US20040209534A1

US20040209534A1 - Swim fin with fabric foot pocket

Info

Publication number: US20040209534A1
Application number: US10/418,526
Authority: US
Inventors: Richard Graham
Original assignee: NEOFIN Inc
Current assignee: NEOFIN Inc
Priority date: 2003-04-17
Filing date: 2003-04-17
Publication date: 2004-10-21

Abstract

A swim fin comprises a symmetrical fin blade. The symmetrical fin blade has a symmetrical foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the symmetrical foot pocket receiving portion to the tip portion along side portions of the blade deck. The symmetrical foot pocket receiving portion has a support portion extending generally parallel to the blade deck. A symmetrical fabric foot pocket is joined to an upper surface of the symmetrical fin blade at the symmetrical foot pocket receiving portion. A symmetrical sole is joined to a lower surface of the symmetrical fin blade at the symmetrical foot pocket receiving portion. The symmetrical sole has a base portion extending generally parallel to the blade deck.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to swim fins. More particularly, the present invention relates to a swim fin with a fabric foot pocket.

2. Description of the Related Art

Swim fins are used in a variety of water sports and recreational activities, as well as in many professional endeavors. A swim fin may be worn on a user's foot while swimming to generate propulsive forces that are greater than the propulsive forces that can be generated without a swim fin. The swim fin allows the user to swim faster and have greater control over the user's movement in the water. Accordingly, swim fins are popular with many athletes and professionals.

Some swim fins are molded from plastic or rubber material. Some foot holding elements of swim fins are also formed of molded plastic or rubber material. Some of these foot holding elements are generally uncomfortable for a user. The foot holding elements may fit imperfectly or irritate the user's foot after extended use.

Additionally, some fins are formed with asymmetrical blades or asymmetrical foot holding elements. Some fins are also formed with foot holding elements that are angled relative to portions of the fin blade. Some of these fins may generate unwanted forces on the user's feet, ankles and knees as the user swims. Additionally, some of these fins are expensive to produce.

Additionally, other features of traditional swim fins have inherent inefficiencies in their construction that reduce propulsive forces and create drag on the fin.

SUMMARY OF THE INVENTION

Features of a preferred embodiment of the present invention improve upon conventional swim fins with the use of a fabric foot pocket and other improved fin features. Features of a preferred embodiment of the present invention maximize propulsive forces, minimize injury to the user and reduce manufacturing and production costs of swim fins. Some of the applications and configurations of the improved swim fin will be discussed below. It should be noted that the following discussion relates to several distinct features and not all of the features need to be present in any single embodiment of the present invention. Thus, some of the features may be used with other features in some applications while other applications will only reflect one of the features. Moreover, the features, aspects and advantages of the invention, as recited in the appended claims, can be applied in still other configurations within the scope of the invention, which will become apparent to those of ordinary skill in the art.

Accordingly, in one embodiment of the invention, a swim fin comprises a symmetrical fin blade having a foot pocket receiving portion. A fabric foot pocket is joined to an upper surface of the symmetrical fin blade at the foot pocket receiving portion.

In yet another embodiment, a swim fin comprises a fin blade having a symmetrical foot pocket receiving portion. A symmetrical fabric foot pocket is joined to an upper surface of the fin blade at the symmetrical foot pocket receiving portion.

In still another embodiment, a swim fin comprises a fin blade having a foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck. The foot pocket receiving portion has a support portion extending generally parallel to the blade deck. A fabric foot pocket is joined to an upper surface of the fin blade at the foot pocket receiving portion.

A further embodiment involves a swim fin comprising a fin blade having a foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck. The fin blade has fillets along intersections of the side ribs and the blade deck. A fabric foot pocket is joined to an upper surface of the fin blade at the foot pocket receiving portion.

According to another embodiment, a swim fin comprises a fin blade having a foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck. The fin blade has a plurality of grooves on upper and lower surfaces of the blade deck extending from the foot pocket receiving portion to the tip portion. A fabric foot pocket is joined to an upper surface of the fin blade at the foot pocket receiving portion.

In another embodiment, a swim fin comprises a fin blade having a foot pocket receiving portion. A fabric foot pocket is joined to an upper surface of the fin blade at the foot pocket receiving portion. The fabric foot pocket has an upper portion and a lower portion. The upper portion has a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap portion with a buckle having a double bar configuration.

In still another embodiment, a swim fin comprises a fin blade having a foot pocket receiving portion. A fabric foot pocket is joined to an upper surface of the fin blade at the foot pocket receiving portion. The fabric foot pocket has an upper portion and a lower portion. The upper portion has a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap portion with a strap keeper loop.

In a further embodiment, a swim fin comprises a fin blade having a foot pocket receiving portion. A fabric foot pocket is joined to an upper surface of the fin blade at the foot pocket receiving portion. The fabric foot pocket has an upper portion and a lower portion. The lower portion extends generally parallel to the upper portion.

According to another embodiment, a swim fin comprises a fin blade having a foot pocket receiving portion. A fabric foot pocket is joined to an upper surface of the fin blade at the foot pocket receiving portion. The fabric foot pocket has an upper portion and a lower portion. The lower portion has a stretchable fabric bottom layer defining multiple drain holes. The multiple drain holes include a primary drain hole and a series of smaller secondary drain holes. The series of smaller secondary drain holes include drain holes being defined such that the series of smaller secondary drain holes extends further toward a toe region and side portions of the stretchable fabric bottom layer than the primary drain hole extends.

In yet another embodiment, a swim fin comprises a fin blade having a foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck. A fabric foot pocket is joined to an upper surface of the fin blade at the foot pocket receiving portion. A sole is joined to a lower surface of the fin blade at the foot pocket receiving portion. The sole has a base portion extending generally parallel to the blade deck.

In another embodiment, a swim fin comprises a symmetrical fin blade. The symmetrical fin blade has a symmetrical foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the symmetrical foot pocket receiving portion to the tip portion along side portions of the blade deck. The symmetrical foot pocket receiving portion has a support portion extending generally parallel to the blade deck. The symmetrical fin blade has fillets along intersections of the side ribs and the blade deck. The symmetrical fin blade has a plurality of grooves on upper and lower surfaces of the blade deck extending from the symmetrical foot pocket receiving portion to the tip portion. A symmetrical fabric foot pocket is joined to an upper surface of the symmetrical fin blade at the symmetrical foot-pocket receiving portion. The symmetrical fabric foot pocket has an upper portion and a lower portion. The upper portion has a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap portion with a strap keeper loop and a buckle having a double bar configuration. The lower portion extends generally parallel to the upper portion and has a stretchable fabric bottom layer defining multiple drain holes. The multiple drain holes include a primary drain hole and a series of smaller secondary drain holes. The series of smaller secondary drain holes include drain holes defined such that the series of smaller secondary drain holes extends further toward a toe region and side portions of the stretchable fabric bottom layer than the primary drain hole extends. A symmetrical sole is joined to a lower surface of the symmetrical fin blade at the symmetrical foot pocket receiving portion. The symmetrical sole has a base portion extending generally parallel to the blade deck. The symmetrical sole and the symmetrical fin blade define multiple drain holes generally corresponding to the multiple drain holes defined in the stretchable fabric bottom layer of the lower portion of the symmetrical fabric foot pocket.

According to another embodiment, a method of making a swim fin comprises the steps of forming a fin blade having a symmetrical foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the symmetrical foot pocket receiving portion to the tip portion along side portions of the blade deck. Forming a symmetrical fabric foot pocket having an upper portion and a lower portion. The upper portion has a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap portion. The lower portion extends generally parallel to the upper portion and has a stretchable fabric bottom layer. Joining the symmetrical fabric foot pocket to an upper surface of the fin blade at the symmetrical foot pocket receiving portion.

In another embodiment, a method of making a symmetrical fabric foot pocket comprises the steps of forming an upper portion of a symmetrical fabric foot pocket by having a first stretchable fabric layer with a curved end, and side portions. Placing a second less-stretchable fabric layer with a curved end, and side portions over at least part of an upper surface of the first stretchable fabric layer. Joining the first stretchable fabric layer to the second less-stretchable fabric layer, and attaching a heel strap to at least part of the first stretchable fabric layer and at least part of the second less-stretchable fabric layer. Forming a lower portion of the symmetrical fabric foot pocket by having a stretchable fabric bottom layer with a curved end, and side portions, and defining at least one drain hole in the stretchable fabric bottom layer. Placing the upper portion of the symmetrical fabric foot pocket over the lower portion of the symmetrical fabric foot pocket such that the curved ends of the first and second layers of the upper portion are aligned with the bottom layer of the lower portion and such that the upper and lower portions are generally symmetrical about a longitudinal centerline. Joining the upper portion of the symmetrical fabric foot pocket with the lower portion of the symmetrical fabric foot pocket around the curved ends and along the side portions such that the upper and lower portions form a pocket having an opening at an end opposite the curved ends.

In still another embodiment, a symmetrical fabric foot pocket for a swim fin comprises an upper symmetrical portion and a lower symmetrical portion. The upper symmetrical portion has a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap. The lower symmetrical portion has a stretchable fabric bottom layer. The lower symmetrical portion extends generally parallel to the upper symmetrical portion.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects and advantages of the present invention are described below with reference to a preferred embodiment, that is intended to illustrate, but not to limit the present invention. The drawings contain five figures. [0023]
FIG. 1 is a side elevational view of a swim fin incorporating features of the present invention; [0024]
FIG. 2 is an exploded perspective view of the bottom of the swim fin of FIG. 1; [0025]
FIG. 3 is top view of the swim fin of FIG. 1; [0026]
FIG. 4 is a bottom view of the swim fin of FIG. 1, with the heel strap portion removed; and [0027]
FIG. 5 is a cross-sectional view of the swim fin of FIG. 1, taken along the cross-sectional line identified by the [0028] reference numeral 5 in FIG. 4.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 1 illustrates a [0029] swim fin 10, including a fabric foot pocket 12. The swim fin 10 is described herein with reference to one preferred embodiment. In a preferred embodiment of the present invention a fabric foot pocket 12, a fin blade 14, and a fin sole 16 are joined together to form a swim fin 10.
Fabric Foot Pocket [0030]
As shown in FIGS. 1 through 3, the [0031] fabric foot pocket 12 has a fabric pocket portion 18 and a heel strap portion 20. The fabric pocket portion 18 preferably covers a portion of a user's foot from the user's toes to about the user's arch and, more desirably, to about the center of the user's arch. The heel strap portion 20 preferably defines a space for a user's heel, such that when the swim fin is worn by a user, the user's heel extends beyond the fabric pocket portion 18 of the foot pocket 12. Additionally, the user's heel preferably extends beyond the fin blade 14 and fin sole 16. The fabric pocket portion 18 preferably extends over an edge of the fin blade 14 and fin sole 16 to provide a comfortable fit for the user. The heel strap portion 20 passes around the back of the heel of the user and is connected to each side of the fabric pocket portion 18 to hold the foot of the user within the foot pocket 12.
The [0032] fabric foot pocket 12 has an open heel configuration that is preferable to foot holding elements used on some other fins. Closed heel configurations generally fit only one size foot. The foot of a user may not fit precisely in a fin having a closed heel configuration, such as, for example, a bootie or fin sock. The foot holding element may be too large or too small for a user's foot. Additionally, fins with closed heel configurations may trap more sand or foreign objects within the foot holding element. An open heel configuration with an adjustable heel strap portion 20 allows for a precise fit on the user's foot. Additionally, the same fin may accommodate feet of varying sizes simply by adjusting the heel strap portion 20. Finally, the open heel configuration is less likely to trap sand and foreign objects.
The [0033] fabric foot pocket 12 has a closed toe configuration that is preferable to foot holding elements used on some other fins. Open toe configurations generally expose a user's toes to objects in the water that may harm the user, such as, for example, rocks or coral. Additionally, open toe configurations do not generally insulate the toes of a user from cold water. The closed toe configuration of the foot pocket protects the user's toes from injury and acts to insulate the user's foot from cold water.
The [0034] fabric foot pocket 12 has a comfortable fabric pocket portion 18 that is preferable to foot holding elements used on some other fins. Some fins incorporate foot holding elements that have a generally rigid construction. These types of foot holding elements may be rigid about the toe region. In some cases, a user may develop a foot cramp because the toe portion of the rigid foot holding element may be confining the user's toes. Additionally, these types of foot holding elements may be rigid on the instep region or other locations where the foot of the user may rub and chafe. The comfortable fabric pocket portion 18 of the foot pocket 12 comfortably holds the foot of the user on the fin.
The [0035] foot pocket 12 preferably has a generally symmetrical shape about a longitudinal centerline. Foot pockets with a generally symmetrical shape have advantages over asymmetrical foot pockets, such as foot pockets that are formed to resemble the shape of a user's foot. Symmetrical pockets help ensure a balanced distribution of force over the fin blade. Additionally, symmetrical pockets tend to hold a user's foot in a position that help's prevent rotation of the fin blade during use. Such rotation can be the cause of injuries to the user or loss of propulsive force during use. Furthermore, symmetrical pockets are cheaper and easier to manufacture and assemble than asymmetrical foot pockets. Finally, swim fins with symmetrical foot pockets often may be used interchangeably on either foot providing users with greater flexibility when dealing with multiple pairs of fins.
The [0036] foot pocket 12 has an upper portion 22 and a lower portion 24. The lower portion 24 of the foot pocket 12 will be discussed further below. The upper portion 22 of the foot pocket 12 preferably has a first layer of stretchable fabric 26. The first layer of stretchable fabric 26 preferably is a stretchable foam fabric, such as, for example, Neoprene. The first layer of stretchable fabric 26 preferably is a strip of fabric having at least one curved end. Preferably, the curved end of the first fabric layer generally forms an arc. Preferably, the curved end of the fabric corresponds to the toe region of the foot pocket 12. The first layer of stretchable fabric preferably provides a comfortable fit about the toes and arch of the user while holding the foot snuggly.
The [0037] upper portion 22 of the foot pocket 12 preferably has a second layer of fabric 28. The second layer of fabric 28 preferably is less stretchable than the first layer of fabric 26. The second layer of fabric 28 preferably is made of a fabric such as, for example, Cordura or Codra. The second layer of fabric 28 preferably is a strip of fabric having at least one curved end. Preferably, the curved end of the second fabric layer generally forms an arc. Preferably, the curved end of the fabric corresponds to the toe region of the foot pocket 12. The second layer 28 preferably corresponds in shape with at least a portion of the first layer 26. Preferably, the curved end of the second layer 28 corresponds with the curved end of the first layer 26. The second layer 28 preferably is shorter than the first layer 26. The second layer 28 preferably does not extend in a direction opposite its curved end as far as the first layer 26 extends in a direction opposite its curved end. The second less stretchable fabric layer 28 provides increased support to the upper portion 22 of the foot pocket 12 while maintaining flexibility. The extra support is useful to help transfer force from the user's foot to the fin blade 14 as the user kicks. Additionally, the second less stretchable fabric layer 28 of the foot pocket 12 helps prevent tearing of the foot pocket 12.
The second less [0038] stretchable fabric layer 28 of the foot pocket 12 preferably does not give or flex significantly under the force generated by the user's kick. The second less stretchable fabric layer 28 preferably provides a surface that is strong enough to accommodate the full force of the user's downward stroke and transfer that force to the fin blade 14, generating increased propulsion for the user.
The [0039] second layer 28 of the upper portion 22 preferably is joined to the first layer 26 of the upper portion 22. The second layer 28 preferably is placed over the first layer 26 such that the curved ends of the layers are aligned and the first layer 26 extends beyond the second layer 28 in a direction opposite the curved ends. The second layer 28 preferably is joined to the first layer 26 at least at a location where the first layer 26 extends beyond the second layer 28,. The layers preferably are joined together with at least one strip of tape material 30, such as, for example, Nylon tape, being placed over the two layers 26, 28 and sewn down with thread 32, such as, for example, Nylon thread. Preferably, at least a second strip of tape material 34 is placed over the two layers 26, 28 and the first strip of tape material 30, and sewn down with thread 36, to strengthen the connection between the layers. Preferably, the connection between the first stretchable layer 26 and the second less stretchable layer 28 is strong enough, and provides adequate support for the layers 26, 28, so that the layers 26, 28 do not tear or pucker under the forces generated by normal use.
The [0040] upper portion 22 of the foot pocket 12 preferably comprises an instep strap 38, as best seen in the cross sectional view of FIG. 5. The instep strap 38 preferably is an adjustable strap. The instep strap 38 provides additional support along the instep of the foot of the user. By adjusting the instep strap 38 to fit snuggly over the top of the foot the force generated by the foot can be transferred to the fin blade more effectively. The instep strap 38 preferably has a first piece 40 and a second piece 42. The pieces preferably comprise fabric material such as, for example, Nylon webbing. The first piece 40 of the instep strap 38 preferably has a section of fabric including either hook or loop fasteners. The second piece 42 of the instep strap 38 preferably has a section of fabric including either loop or hook fasteners to releasably join with the hook or loop fasteners of the first piece 40 of the instep strap 38.
Preferably, a [0041] section 44 of the first piece 40 of the instep strap 38 is attached toward one side 46 of the fabric pocket portion 18 such that the two ends 48, 50 of the first piece 40 extend toward another side 52 of the fabric pocket portion 18 where the second piece 42 of the instep strap 38 is attached. The second piece 42 of the instep strap 38 preferably has the loop or hook fasteners on upper and lower sides of the piece. The first piece 40 of the instep strap 38 preferably has hook or loop fasteners on the two ends 48, 50 of the of first piece 40 such that one end 48 is fastened to the upper side of the second piece 42 and the other end 50 is fastened to the lower side of the second piece 42.
The [0042] first piece 40 of the instep strap 38 preferably also has a section of material, such as, for example, Nylon tape, extending from at least one end to form a pull-tab (not shown). The instep strap 38 preferably is joined to the upper portion 22 of the foot pocket 12. Preferably the instep strap 38 is joined to the first layer 40 of the upper portion 22 of the foot pocket 12, toward side edges 46, 52 of the fabric pocket portion 18, as will be described further.
Additionally, in other embodiments, the [0043] instep strap 38 may be a single strap that is joined to one side of the foot pocket 12. The instep strap 38 may be placed over the instep of the user's foot and through a loop on another side of the foot pocket 12. The instep strap 38 may then be adjustably fastened by folding the instep strap 38 back on itself and releasably attaching one part of the instep strap 38 to another part of the instep strap 38 using hook and loop fasteners.
Referring to FIG. 3, a [0044] portion 54 of the first fabric layer 26 of the upper portion 22 of the foot pocket 12 preferably is folded up and over the instep strap 38. Advantages of folding a portion 54 of the first fabric layer 26 over the instep strap include, first, providing a streamlined housing for the instep strap to reduce drag on the fin that may be caused by the instep strap as the user travels through the water, and second, providing a soft rolled edge or surface for contacting the foot of the user to prevent chaffing and blistering. An end of the folded portion 54 preferably is turned under and stitched forming a finished edge 56. The folded portion 54 of the first fabric layer 26 covering the instep strap 38 preferably is joined at least to another portion of the first fabric layer 26 toward its side edges 46, 52, as will be described further.
The [0045] foot pocket 12 has a heel strap portion 20 that is joined to the upper portion 22 of the foot pocket 12 on the fabric pocket portion 18. Preferably the heel strap portion 20 comprises side sections 58, 60 that are attached to the upper portion 22 of the foot pocket 12. The heel strap side sections 58, 60 preferably comprise a relatively non-stretchable material such as, for example, Nylon webbing. The heel strap portion 20 has advantages over heel strap portions of some other swim fins. Some swim fins have heel straps that are fastened through pins that are molded into the fin blade. The pins on some of these types of fins may break through the fin blade. Additionally, some swim fins have heel straps that have multiple or complicated fitting parts, including metal parts. These parts may break or corrode after prolonged exposure to the water. The heel strap portion 20 has the advantage of distributing force over the foot pocket to reduce the likelihood of breakage. Additionally, the materials used in the heel strap portion and foot pocket are less likely to corrode.
The [0046] side sections 58, 60 of the heel strap 20 preferably extend along sides of the upper portion 22 of the foot pocket 12. The side sections 58, 60 of the heel strap 20 preferably are attached to at least part of the second fabric layer 28 of the upper portion 22. The side sections 58, 60 of the heel strap 20 preferably are also attached to at least part of one or more strips of tape material 30, 34 joining the first fabric layer 26 with the second fabric layer 28 of the upper portion 22 of the foot pocket 12. Additionally, each side section 58, 60 of the heel strap 20 preferably is attached to the first fabric layer 26 of the upper portion 22 and also attached to one of the pieces 40, 42 of the instep strap 38 toward a respective side edge 46, 52 of the fabric pocket portion 18.
One of the [0047] side sections 58 of the heel strap 20 preferably passes under the folded portion 54 of the first fabric layer 26, through a slit formed near the location where the material is folded. The other side section 60 of the heel strap 20 preferably passes over, and is also attached to, the folded portion 54 of the first fabric layer 26, such that the folded portion 54 is bound, on that respective side edge, to the side section 60 of the heel strap 20, one of the pieces 42 of the instep strap 38, and the rest of the first layer 26 of, the upper portion 22.
The [0048] heel strap portion 20 of the foot pocket 12 preferably comprises a buckle 62. The buckle 62 preferably is attached to the side section 60 of the heel strap 20 that passes over the folded portion 54 of the first fabric layer 26 of the upper section 22 of the fabric foot pocket 12. The buckle 62 preferably has a double bar configuration. The side section 60 of the heel strap 20 that passes over the folded portion 54 of the foot pocket 12 preferably is looped over one of the bars of the buckle 62 and attached to the upper portion 22 of the foot pocket 12 on both sides of the loop 64. The buckle 62 preferably is a curved tension lock buckle with a high release. The buckle 62 preferably is made of a plastic material such as, for example, Acetal or Nylon plastic.
The [0049] heel strap portion 20 of the foot pocket 12 preferably comprises a central strap section 66 and an extension strap section 68. The central strap section 66 of the heel strap 20 preferably comprises a pad 70, a stretchable strap segment 72, and a strap keeper 74. The pad 70 preferably is a stretchable fabric such as, for example, Neoprene. In order to enhance comfort and distribute the force acting on the heel, the pad 70 is desirably about an inch and a half wide. Additionally, the pad is preferably thicker than, and at least as soft as, the stretchable strap segment 72. Desirably, the pad is at least about an eighth of an inch thick and at least as soft as Neoprene. The stretchable strap segment 72 preferably is an elastic strap having a combination of fabrics, such as, for example, rubber and Nylon, woven together. An advantage of a stretchable strap segment 72 is that the strap will fit tightly on the heel of the user and stretch open for ease of entry or exit of the user's foot.
The [0050] pad 70 preferably is joined to the stretchable strap segment 72. Preferably, the pad 70 is sewn directly onto the stretchable strap segment 72. The strap keeper 74 preferably is a loop of plastic material, such as, for example, Nylon plastic, that preferably is secured between the pad 70 and the stretchable strap segment 72, the loop extending away from the pad 70 to receive the loose end of the extension strap segment 68 described further below.
One side of the [0051] central strap section 66 is joined to the side section 58 of the heel strap 20 that passes under the folded portion 54 of the foot pocket 12. An end 76 of the side section 58 of the heel strap 20 passing under the folded portion 54 extends beyond an edge of the fabric pocket portion 18 of the foot pocket 12. The end 76 of the side section 54 preferably is joined to both the stretchable strap segment 72 and the pad 70 of the central strap section 66 of the heel strap 20. Additionally, an end 78 of the pad 70 closest the end 76 of the side section 58 preferably extends beyond the edge of the stretchable strap segment 76, toward the fabric pocket portion 18 of the foot pocket 12, and preferably is joined to the first fabric layer 26 of the upper portion 22 of the foot pocket 12.
The [0052] heel strap portion 20 of the foot pocket 12 preferably comprises an extension strap section 68. The extension strap section 68 of the heel strap 20 preferably is a relatively non-stretchable material such as, for example, Nylon webbing. The extension strap section 68 preferably is joined to both the stretchable strap segment 72 and the pad 70 of the central strap section 66 of the heel strap 20. The extension strap section 68 preferably is sufficiently long to be looped through the buckle 62. The extension strap section 68 can be moved through the buckle 62 to adjust the effective length of the heel strap portion 20 relative to the ends of the fabric foot pocket 18. The loose end of the extension strap section 68 can be placed through the loop of the strap keeper 74 located on the central strap section 66.
As mentioned previously, the [0053] foot pocket 12 has an upper portion 22 and a lower portion 24. The lower portion 24 of the foot pocket 12 extends generally parallel to the upper portion 22. The lower portion 24 of the foot pocket 12 preferably comprises at least a bottom layer of stretchable fabric 80. The bottom layer of stretchable fabric 80 preferably is a stretchable foam fabric, such as, for example, Neoprene. The bottom layer of stretchable fabric 80 preferably is a strip of fabric having at least one curved end. Preferably, the curved end of the bottom fabric layer 80 generally forms an arc. Preferably, the curved end of the fabric corresponds to the toe region of the foot pocket 12.
The [0054] bottom layer 80 preferably corresponds in shape with at least a portion of the first layer 26 of the upper portion 22 of the foot pocket 12. Preferably, the curved end of the bottom layer 80 corresponds with the curved ends of the first and second layers 26, 28 of the upper portion 20. The bottom layer 80 preferably is shorter than the first layer 26 of the upper portion 22 and preferably longer than the second layer 28 of the upper portion 22. The bottom layer 80 preferably does not extend in a direction opposite its curved end as far as the first layer 26 extends in a direction opposite its curved end, when the first layer 26 is in an unfolded orientation. However, when the first layer 26 of the upper portion 22 is folded over, as described previously, the length of the first layer 26, from the curved end to the fold, preferably is generally the same as the length of the bottom layer 80 from its curved end to its opposite end. The bottom layer 80 preferably extends in a direction opposite its curved end further than the second layer 28 of the upper portion 22 extends in a direction opposite its curved end.
The [0055] bottom layer 80 of the lower portion 24 of the foot pocket 12 preferably defines one or more drain holes 82. The bottom layer 80 preferably defines at least one relatively larger primary drain hole 84 and preferably multiple relatively smaller secondary drain holes 86, of potentially various sizes, preferably located toward the curved end of the bottom layer 80 and extending toward the sides 88, 90 of the bottom layer 80. Preferably, a series of smaller secondary drain holes 86 extend further toward the toe region and the side portions 88, 90 of the stretchable fabric bottom layer 80 than the primary drain hole 84 extends toward the toe region and the side portions 88, 90.
The sizes of the drain holes [0056] 82 may vary depending on the size of the fin 10. In one embodiment, the primary drain hole 84 preferably is about one half of an inch in diameter, a centrally located secondary drain hole 86 preferably is about one quarter of an inch in diameter, and other secondary drain holes 86 preferably are about one eighth of an inch in diameter. Incorporating multiple holes 82 in the foot pocket 12 allows for better drainage of sand and water from the foot pocket while maintaining the strength and integrity of the foot pocket 12. By increasing the number of holes defined in the foot pocket, and spreading them out over the toe and side regions where sand may accumulate, more water is likely to circulate in the foot pocket 12 to flush out sand and other foreign objects.
The [0057] upper portion 22 of the foot pocket 12 preferably is joined to the lower portion 24 of the foot pocket 12 such that a space 92 is defined between the upper and lower portions 22, 24. As previously discussed, the upper portion 22, preferably comprises first and second layers 26, 28 (preferably aligned and joined with at least one strip of tape material 30), a heel strap portion 20 (preferably having heel strap side sections 58, 60, a buckle 62, a central strap section 66, and an extension strap section 68), and an instep strap 38 (preferably covered by a folded over portion 54 of the first layer 26). The lower portion 24 preferably comprises a bottom layer 80 as described above.
The [0058] upper portion 22 preferably is placed over the lower portion 24 such that the curved ends of the first and second layers 26, 28 of the upper portion 22 are aligned with the bottom layer 80 of the lower portion 24. The lower portion 24 preferably is joined to the upper portion 22 at least around the curved ends and along the side portions 88, 90, the upper and lower portions 22, 24 forming a pocket 92 having an opening at an end opposite the curved ends. The upper and lower portions 22, 24 preferably are joined together with at least one strip of webbing material (not shown), such as, for example, Nylon webbing, being placed around the edges of the upper and lower portions 22, 24. The upper and lower portions 22, 24 and upper and lower ends of the webbing material preferably are sewn together at least around the curved ends and along the side portions 88, 90 of the upper and lower portions 22, 24 of the foot pocket 12.
The [0059] complete foot pocket 12, including upper and lower portions 22, 24, preferably is placed on the fin blade 14 and joined to the fin blade 14 and fin sole 16 as described below.
Fin Blade [0060]
The [0061] fin blade 14 preferably comprises a tip portion 94 at one end of the blade 14 and a foot pocket receiving portion 96 at another end of the blade 14. The fin blade 14 also comprises side ribs 98, 100 extending from the tip portion 94 to the foot pocket receiving portion 96 along the edges of the blade 14. The fin blade 14 has a blade deck 102 located generally between the tip portion 94 and the foot pocket receiving portion 96 and between the side portions of the blade 14. The fin blade 14 preferably is a single molded piece of plastic.
The [0062] fin blade 14 preferably has a generally symmetrical shape about a longitudinal centerline. The tip 94 of the blade 14 preferably has two side edges 104, 106 that are about equidistant from a longitudinal centerline and about equidistant from the foot pocket receiving portion 96. A center section 108 of the tip 94 of the blade 14 preferably extends beyond the side edges 104, 106 to form a central tip 108 located along a longitudinal centerline. The symmetrical shape of the fin blade 14 spreads the force generated during a user's kick equally across the width of the blade 14. Accordingly, permanent blade warping and stress on a user's ankles and knees that may be associated with nonsymmetrical blades are greatly reduced and more propulsive force is generated.
Embodiments of the invention may include fins of many different lengths or structures. The length and shape of a fin blade preferably may vary depending on the type of activity the fin is designed for. For example, in one embodiment, the swim fin is a surf style swim fin designed for use while body surfing or body boarding. In one embodiment of a surf style swim fin, the fin blade preferably is from about 10 inches long to about 16 inches long. Other embodiments of the invention include fitness fins, skin diving fins, SCUBA diving fins, and many other types of fins. The length of the fin blade may vary significantly depending on the type of intended use or the type of user. [0063]
The foot [0064] pocket receiving portion 96 of the fin blade 14 preferably has a shape that generally corresponds to the shape of the fabric foot pocket 12. The foot pocket receiving portion 96 preferably has a generally symmetrical shape about a longitudinal centerline to correspond with a symmetrical fabric foot pocket 12. The foot pocket receiving portion 96 preferably has a support portion 110 for contacting the fabric foot pocket 12.
The [0065] support portion 110 of the foot pocket receiving portion 96 preferably extends generally parallel to the blade deck 102. The parallel extension of the support portion 110 of the foot pocket receiving portion 96 relative to the blade deck 102 holds the foot pocket 12 generally parallel to the blade deck 102. This allows a user to kick without creating undue stress on the user's foot or ankle that may be caused if the support portion 110 of the foot pocket receiving portion 96 is angled relative to the blade deck 102. Some angled configurations of the support portion 110 may tend to cause a user's foot rotate, potentially injuring the user or resulting in less propulsive force generated by the user.
Additionally, the foot [0066] pocket receiving portion 96 preferably defines one or more holes 112 corresponding to the holes 82 defined in the bottom layer 80 of the lower portion 24 of the fabric foot pocket 12. The holes 112 may be the same size and configuration as the holes 82 in the fabric foot pocket 12, or they may be of different sizes and configurations. Preferably, the holes 112 are defined and configured such that water and sand can be flushed from the fabric foot pocket 12 out of the fin 10.
The sizes of the [0067] holes 112 may vary depending on the size of the fin 10. In one embodiment, one of the holes 112, preferably corresponding to the primary drain hole 84, desirably is about one inch in diameter, while other holes 112, corresponding to secondary drain holes 86, preferably are about one quarter of an inch in diameter to about three eighths of an inch in diameter. In some embodiments, holes 112 may be formed during the molding process. In some embodiments, holes 112 may be punched or drilled following the molding process.
The [0068] fin blade 14 preferably has fillets 114 along intersections of the side ribs 98, 100 and the blade deck 102. The fillets 114 are curved portions of the fin blade 14 that join the side ribs 98, 100 to the top and bottom surfaces of the blade deck 102. Incorporating fillets 114 along intersections of side ribs 98, 100 and blade decks 102 provides greater strength against bending than a swim fin having side ribs that join the blade deck at right angles. The added strength of the blade creates greater propulsion forces for the user.
The [0069] fin blade 14 preferably has a plurality of grooves 116 defined on a surface of the blade deck 102. Preferably, the grooves 116 are defined on upper and lower surfaces of the blade deck 102. Preferably, the grooves 116 extend from the foot pocket receiving portion 96 to the tip portion 94 of the blade 14. The grooves 116 act as water flow channels that direct the water toward the tip 94 of the fin blade 14 as a user moves forward through the water. The grooves 116 preferably are uninterrupted by surfaces that would create turbulence. The grooves 116 help to prevent drag on the fin that can be caused by alternative grooves or waffle designs that are oriented on the blade so that they interfere with the free flow of water toward the tip of the blade, which is the end of the blade as a user moves forward through the water.
Additionally, the [0070] fin blade 14 preferably has a tapered strut 118 extending out from the blade deck 102 along the bottom surface of the fin blade 14. The strut 118 provides further support for the fin blade 14 and keeps it from folding or bending excessively.
Fin Sole [0071]
The [0072] fin sole 16 has a base portion 120 preferably with tread 122 formed thereon. The tread 122 preferably is diamond shaped and preferably is distributed uniformly over the sole 16. An advantage of tread 122 is to assist in preventing a user from slipping when walking on hard surfaces such as boat docks, rocks or jetties. The fin sole 16 preferably is a single molded piece of plastic or rubber material. Additionally, in some other embodiments of the invention, the fin sole 16 may be formed as an integral part of the fin blade 14 rather than as a separate piece.
The fin sole [0073] 16 preferably has a shape that generally corresponds to the shape of the foot pocket receiving portion 96 on the fin blade 14. The fin sole 16 preferably has a generally symmetrical shape about a longitudinal centerline to correspond with a symmetrical foot pocket receiving portion 96. The sole 16 preferably is joined to a lower surface of the fin blade 14 at the foot pocket receiving portion 96. The sole 16 preferably has a fabric material, such as, for example, Nylon webbing, attached along its outer edges. The fabric material preferably is attached to the upper and lower surfaces of the sole 16 along the edges of the sole 16. Strips of fabric material preferably extend from the sole 16 near the side edges of the sole 16 nearest the opening 92 in the foot pocket 12. The strips of fabric material preferably are folded up around the edge of the fin blade and joined with the foot pocket in the assembly process.
Additionally, the fin sole [0074] 16 preferably defines one or more holes 124 corresponding to the holes 82 defined in the bottom layer 80 of the lower portion 24 of the fabric foot pocket 12 or the holes 112 defined in the foot pocket receiving portion 96 of the fin blade 14. The holes 124 may be the same size and configuration as the holes 82, 112 in the fabric foot pocket 12 or fin blade 14, or they may be of different sizes and configurations. Preferably, the holes 124 are defined and configured such that water and sand can be flushed from the fabric foot pocket 112 out of the fin 10. Additionally, the size and configuration of the holes 82, 112, 124 in the swim fin 10 preferably are sized and configured to allow for adequate flushing of the foot pocket 12 while maintaining strength and integrity of the support portion 110 of the foot pocket receiving portion 96 and the base portion 120 of the fin sole 16.
The sizes of the [0075] holes 124 may vary depending on the size of the fin 10. In one embodiment, one of the holes 124, preferably corresponding to the primary drain hole 84, desirably is about one inch in diameter, while other holes 124, corresponding to secondary drain holes 86, preferably are about one quarter of an inch in diameter to about three eighths of an inch in diameter. Additionally, the support portion 110 of the foot pocket receiving portion 96 preferably is at least about one sixteenth of an inch thick and the base portion 120 of the fin sole 16 preferably is about one eighth of an inch thick. In some embodiments, holes 124 may be formed during a molding process. In some embodiments, holes 124 may be punched or drilled following a molding process. Incorporating multiple holes of varying sizes spread over a bottom portion of the fin, as opposed to a single large central hole, provides drainage to a greater effective area while maintaining the strength and stability of the foot pocket 12, fin blade 14 and fin sole 16.
The [0076] base 120 of the fin sole 16 preferably is configured such that, when the base 120 of the fin sole,16 is joined to the foot pocket receiving portion 96 of the fin blade 14, the base portion 120 of the fin sole 16 extends generally parallel to the blade deck 102. The extension of the base 120 of the fin sole 16 generally parallel to the blade deck 102 allows the user to keep the fin blade 14 generally parallel with the bottom of the user's foot. This allows the user to maximize the propulsive force of each kick. Additionally, the user is better able to walk or run outside of the water because the fin blade 14 is elevated with respect to the fin sole 16, and the fin blade 14 is not angled substantially relative to the fin sole 16. Fin blades that are angled relative to fin soles may experience increased wear on the blade, and may cause the user to walk unevenly. Accordingly, a swim fin having a blade 14 that is elevated from, and generally parallel to, the base 120 of the fin sole 16 maximizes propulsion, acts to prevent wear on the fin blade 14, and facilitates walking or running by the user.
Swim Fin [0077]
As best shown in FIGS. 2, 3 and [0078] 4, the swim fin 10 preferably is formed by placing the fabric foot pocket 12, having an upper portion 22 and lower portion 24, over the fin blade 14 at the foot pocket receiving portion 96. Additionally, the fin sole 16 is placed below the fin blade 14 at the foot pocket receiving portion 96. The fabric foot pocket 12, and the fin sole 16 preferably have generally corresponding shapes for alignment with the foot pocket receiving portion 96 of the fin blade 14. The fin sole 16 preferably is glued onto a bottom portion of the foot pocket receiving portion 96.
The [0079] fabric foot pocket 22 preferably is sewn to the fin blade 14 and the fin sole 16 around the curved end and side portions 88, 90. Preferably, strips of fabric material of the fin sole 16 are folded up around the edge of the fin blade 14 and joined with the foot pocket 12 in the assembly process. The lower portion 24 of the fabric foot pocket 12 preferably is also sewn to the fin blade 14 and the fin sole 16 along the open edge of the foot pocket 12. Preferably, the stitch attaching the lower portion 24 of the fabric foot pocket 12 to the fin blade 14 and fin sole 16 does not extend all the way to the side portions 88, 90 of the foot pocket 12. The spaces on either side of the stitch act to allow water to enter the fin between the foot pocket 12 and the fin blade 14 and facilitate flushing sand out of the fin. Additionally, the lower portion 24 of the foot pocket preferably extends slightly beyond the edge of the fin blade 14 and the fin sole 16 to comfortably protect the bottom of the user's foot from chaffing or cuts.
The embodiments described above include many features that improve the comfort and performance of a swim fin, and that effectively reduce manufacturing and production costs. Although this invention has been disclosed in the context of a preferred embodiments, it will be understood by those of skill in the art that the present invention extends beyond the specifically disclosed embodiments to other alternative embodiments and/or uses of the invention and obvious modifications and equivalents thereof. Accordingly, the invention is to be defined solely by the appended claims. [0080]

Claims

What is claimed is:

1. A swim fin comprising a symmetrical fin blade having a foot pocket receiving portion; and a fabric foot pocket being joined to an upper surface of the symmetrical fin blade at the foot pocket receiving portion.

2. The swim fin of claim 1, wherein the foot pocket receiving portion and the fabric foot pocket are symmetrical.

3. The swim fin of claim 2, additionally comprising a sole being joined to a lower surface of the fin blade at the foot pocket receiving portion, wherein the sole is symmetrical.

4. The swim fin of claim 1, wherein the symmetrical fin blade additionally comprises a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck, and the foot pocket receiving portion has a support portion extending generally parallel to the blade deck.

5. The swim fin of claim 1, wherein the symmetrical fin blade additionally comprises a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck, and the symmetrical fin blade has fillets along intersections of the side ribs and the blade deck.

6. The swim fin of claim 1, wherein the symmetrical fin blade additionally comprises a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck, and the symmetrical fin blade has a plurality of grooves on upper and lower surfaces of the blade deck extending from the foot pocket receiving portion to the tip portion.

7. The swim fin of claim 1, additionally comprising a sole being joined to a lower surface of the symmetrical fin blade at the foot pocket receiving portion, wherein the fin blade additionally comprises a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck, and wherein the sole has a base portion extending generally parallel to the blade deck.

8. The swim fin of claim 1, wherein the fabric foot pocket has an upper portion and a lower portion, and the upper portion has a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap portion with a strap keeper loop and a buckle that has a double bar configuration.

9. The swim fin of claim 1, wherein the fabric foot pocket has an upper portion and a lower portion, and the lower portion extends generally parallel to the upper portion.

10. The swim fin of claim 1, wherein the fabric foot pocket has an upper portion and a lower portion, the lower portion has a stretchable fabric bottom layer defining multiple drain holes, the multiple drain holes include a primary drain hole and a series of smaller secondary drain holes, and the series of smaller secondary drain holes include drain holes being defined such that the series of smaller secondary drain holes extends further toward a toe region and side portions of the stretchable fabric bottom layer than the primary drain hole extends.

11. The swim fin of claim 10, additionally comprising a sole being joined to a lower surface of the symmetrical fin blade at the foot pocket receiving portion, wherein the sole and the symmetrical fin blade define multiple drain holes generally corresponding to the multiple drain holes defined in the stretchable fabric bottom layer of the lower portion of the fabric foot pocket.

12. A swim fin comprising a fin blade having a symmetrical foot pocket receiving portion; and a symmetrical fabric foot pocket being joined to an upper surface of the fin blade at the symmetrical foot pocket receiving portion.

13. The swim fin of claim 12, wherein the fin blade is symmetrical.

14. The swim fin of claim 12, additionally comprising a sole being joined to a lower surface of the fin blade at the symmetrical foot pocket receiving portion, wherein the sole is symmetrical.

15. The swim fin of claim 12, wherein the fin blade additionally comprises a tip portion, a blade deck, and side ribs extending from the symmetrical foot pocket receiving portion to the tip portion along side portions of the blade deck, and the symmetrical foot pocket receiving portion has a support portion extending generally parallel to the blade deck.

16. The swim fin of claim 12, wherein the fin blade additionally comprises a tip portion, a blade deck, and side ribs extending from the symmetrical foot pocket receiving portion to the tip portion along side portions of the blade deck, and the fin blade has fillets along intersections of the side ribs and the blade deck.

17. The swim fin of claim 12, wherein the fin blade additionally comprises a tip portion, a blade deck, and side ribs extending from the symmetrical foot pocket receiving portion to the tip portion along side portions of the blade deck, and the fin blade has a plurality of grooves on upper and lower surfaces of the blade deck extending from the symmetrical foot pocket receiving portion to the tip portion.

18. The swim fin of claim 12, additionally comprising a sole being joined to a lower surface of the fin blade at the symmetrical foot pocket receiving portion, wherein the fin blade additionally comprises a tip portion, a blade deck, and side ribs extending from the symmetrical foot pocket receiving portion to the tip portion along side portions of the blade deck, and wherein the sole has a base portion extending generally parallel to the blade deck.

19. The swim fin of claim 12, wherein the symmetrical fabric foot pocket has an upper portion and a lower portion, and the upper portion has a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap portion with a strap keeper loop and a buckle that has a double bar configuration.

20. The swim fin of claim 12, wherein the symmetrical fabric foot pocket has an upper portion and a lower portion, and the lower portion extends generally parallel to the upper portion.

21. The swim fin of claim 12, wherein the symmetrical fabric foot pocket has an upper portion and a lower portion, the lower portion has a stretchable fabric bottom layer defining multiple drain holes, the multiple drain holes include a primary drain hole and a series of smaller secondary drain holes, and the series of smaller secondary drain holes include drain holes being defined such that the series of smaller secondary drain holes extends further toward a toe region and side portions of the stretchable fabric bottom layer than the primary drain hole extends.

22. The swim fin of claim 21, additionally comprising a sole being joined to a lower surface of the fin blade at the symmetrical foot pocket receiving portion, wherein the sole and the fin blade define multiple drain holes generally corresponding to the multiple drain holes defined in the stretchable fabric bottom layer of the lower portion of the symmetrical fabric foot pocket.

23. A swim fin comprising a fin blade having a foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck, the foot pocket receiving portion having a support portion extending generally parallel to the blade deck; and a fabric foot pocket being joined to an upper surface of the fin blade at the foot pocket receiving portion.

24. The swim fin of claim 23, wherein the fin blade is symmetrical.

25. The swim fin of claim 23, wherein the foot pocket receiving portion and the fabric foot pocket are symmetrical.

26. The swim fin of claim 25, additionally comprising a sole being joined to a lower surface of the fin blade at the symmetrical foot pocket receiving portion, wherein the sole is symmetrical.

27. The swim fin of claim 23, wherein the fin blade has fillets along intersections of the side ribs and the blade deck.

28. The swim fin of claim 23, wherein the fin blade has a plurality of grooves on upper and lower surfaces of the blade deck extending from the foot pocket receiving portion to the tip portion.

29. The swim fin of claim 23, additionally comprising a sole being joined to a lower surface of the fin blade at the foot pocket receiving portion, wherein the sole has a base portion extending generally parallel to the blade deck.

30. The swim fin of claim 23, wherein the fabric foot pocket has an upper portion and a lower portion, and the upper portion has a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap portion with a strap keeper loop and a buckle that has a double bar configuration.

31. The swim fin of claim 23, wherein the fabric foot pocket has an upper portion and a lower portion, and the lower portion extends generally parallel to the upper portion.

32. The swim fin of claim 23, wherein the fabric foot pocket has an upper portion and a lower portion, the lower portion has a stretchable fabric bottom layer defining multiple drain holes, the multiple drain holes include a primary drain hole and a series of smaller secondary drain holes, and the series of smaller secondary drain holes include drain holes being defined such that the series of smaller secondary drain holes extends further toward a toe region and side portions of the stretchable fabric bottom layer than the primary drain hole extends.

33. The swim fin of claim 32, additionally comprising a sole being joined to a lower surface of the fin blade at the foot pocket receiving portion, wherein the sole and the fin blade define multiple drain holes generally corresponding to the multiple drain holes defined in the stretchable fabric bottom layer of the lower portion of the fabric foot pocket.

34. A swim fin comprising a fin blade having a foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck, the fin blade having fillets along intersections of the side ribs and the blade deck; and a fabric foot pocket being joined to an upper surface of the fin blade at the foot pocket receiving portion.

35. A swim fin comprising, a fin blade having a foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck, the fin blade having a plurality of grooves on upper and lower surfaces of the blade deck extending from the foot pocket receiving portion to the tip portion; and a fabric foot pocket being joined to an upper surface of the fin blade at the foot pocket receiving portion.

36. A swim fin comprising a fin blade having a foot pocket receiving portion; and a fabric foot pocket being joined to an upper surface of the fin blade at the foot pocket receiving portion, the fabric foot pocket having an upper portion and a lower portion, the upper portion having a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap portion with a buckle having a double bar configuration.

37. A swim fin comprising a fin blade having a foot pocket receiving portion; and a fabric foot pocket being joined to an upper surface of the fin blade at the foot pocket receiving portion, the fabric foot pocket having an upper portion and a lower portion, the upper portion having a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap portion with a strap keeper loop.

38. A swim fin comprising a fin blade having a foot pocket receiving portion; and a, fabric foot pocket being joined to an upper surface of the fin blade at the foot pocket receiving portion, the fabric foot pocket having an upper portion and a lower portion, the lower portion extending generally parallel to the upper portion.

39. A swim fin comprising a fin blade having a foot pocket receiving portion; and a fabric foot pocket being joined to an upper surface of the fin blade at the foot pocket receiving portion, the fabric foot pocket having an upper portion and a lower portion, the lower portion having a stretchable fabric bottom layer defining multiple drain holes, the multiple drain holes including a primary drain hole and a series of smaller secondary drain holes, the series of smaller secondary drain holes including drain holes being defined such that the series of smaller secondary drain holes extends further toward a toe region and side portions of the stretchable fabric bottom layer than the primary drain hole extends.

40. A swim fin comprising a fin blade having a foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the foot pocket receiving portion to the tip portion along side portions of the blade deck; a fabric foot pocket being joined to an upper surface of the fin blade at the foot pocket receiving portion; and a sole being joined to a lower surface of the fin blade at the foot pocket receiving portion, the sole having a base portion extending generally parallel to the blade deck.

41. A swim fin comprising a symmetrical fin blade having a symmetrical foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the symmetrical foot pocket receiving portion to the tip portion along side portions of the blade deck, the symmetrical foot pocket receiving portion having a support portion extending generally parallel to the blade deck, the symmetrical fin blade having fillets along intersections of the side ribs and the blade deck, the symmetrical fin blade having a plurality of grooves on upper and lower surfaces of the blade deck extending from the symmetrical foot pocket receiving portion to the tip portion; a symmetrical fabric foot pocket being joined to an upper surface of the symmetrical fin blade at the symmetrical foot pocket receiving portion, the symmetrical fabric foot pocket having an upper portion and a lower portion, the upper portion having a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap portion with a strap keeper loop and a buckle having a double bar configuration, the lower portion extending generally parallel to the upper portion and having a stretchable fabric bottom layer defining multiple drain holes, the multiple drain holes including a primary drain hole and a series of smaller secondary drain holes, the series of smaller secondary drain holes including drain holes being defined such that the series of smaller secondary drain holes extends further toward a toe region and side portions of the stretchable fabric bottom layer than the primary drain hole extends; and a symmetrical sole being joined to a lower surface of the symmetrical fin blade at the symmetrical foot pocket receiving portion, the symmetrical sole having a base portion extending generally parallel to the blade deck, the symmetrical sole and the symmetrical fin blade defining multiple drain holes generally corresponding to the multiple drain holes defined in the stretchable fabric bottom layer of the lower portion of the symmetrical fabric foot pocket.

42. A method of making a swim fin comprising the steps of:

forming a fin blade having a symmetrical foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the symmetrical foot pocket receiving portion to the tip portion along side portions of the blade deck;

forming a symmetrical fabric foot pocket having an upper portion and a lower portion, the upper portion having a first stretchable fabric layer, a second less-stretchable fabric layer disposed over at least a portion of an upper surface of the first stretchable fabric layer, and a heel strap portion, the lower portion extending generally parallel to the upper portion and having a stretchable fabric bottom layer; and

joining the symmetrical fabric foot pocket to an upper surface of the fin blade at the symmetrical foot pocket receiving portion.