[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

US3671987A - Swimmer{3 s shoe - Google Patents

Swimmer{3 s shoe Download PDF

Info

Publication number
US3671987A
US3671987A US18053A US3671987DA US3671987A US 3671987 A US3671987 A US 3671987A US 18053 A US18053 A US 18053A US 3671987D A US3671987D A US 3671987DA US 3671987 A US3671987 A US 3671987A
Authority
US
United States
Prior art keywords
sole
shoe
fin
foot
lower edge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US18053A
Inventor
Jean Mayor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Materiaux SA
Original Assignee
Materiaux SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Materiaux SA filed Critical Materiaux SA
Application granted granted Critical
Publication of US3671987A publication Critical patent/US3671987A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B31/00—Swimming aids
    • A63B31/08—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs
    • A63B31/10—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs held by, or attachable to, the hands or feet
    • A63B31/11—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs held by, or attachable to, the hands or feet attachable only to the feet
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/08—Bathing shoes ; Aquatic sports shoes
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B31/00—Swimming aids
    • A63B31/08—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs
    • A63B31/10—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs held by, or attachable to, the hands or feet
    • A63B31/11—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs held by, or attachable to, the hands or feet attachable only to the feet
    • A63B2031/115—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs held by, or attachable to, the hands or feet attachable only to the feet with blade at an angle to the plane of the foot when in use, e.g. to reduce plantar flexion
    • A63B2031/117—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs held by, or attachable to, the hands or feet attachable only to the feet with blade at an angle to the plane of the foot when in use, e.g. to reduce plantar flexion with blade lying substantially in the body-symmetrical plane, e.g. for breast stroke

Definitions

  • This invention relates to the provision of swimming shoes for aiding those swimming the breast stroke. While the flipper" type swim fin made in the shape of a web foot is will known, a fin of this type handicaps instead of helps the person who, for one reason or another, swims the breast stroke. In fact, the natural motion of the legs cannot be performed normally if the foot is extended by a fin of the above-mentioned type. But, observations show that there are advantages in giving the swimmer doing the breast stroke a shoe which facilitates floating with natural leg motions. These means are, for example, particularly useful during life saving operations or when swimmers must move in the water while carrying loads, or are otherwise restricted in their motions. Further, shoes which facilitate floating with natural leg motions are useful to swimmers during underwater diving expeditions.
  • an object of the present invention to provide a swimming shoe which not only allows the legs to be moved in a natural fashion while one swims the breast stroke but aids in the performance of this maneuver.
  • Another object of this invention is to provide a pair of swimming shoes which accomplish the above objects, each of whichis of one-piece, flexible construction.
  • Still another object of this invention is to provide a swimming shoe which permits the swimmer to walk on dry land while wearing a pair.
  • a swimming shoe constructed according to the present invention has a sole portion which is adapted to be attached in any known manner to the foot and a scoop-like fin portion extending downwardly from the underside of the sole.
  • the joint between the fin and thesole extends in the same direction as the longitudinal axis of the latter, and the hollow of the scoop faces inwardly towards the instep portion of the sole.
  • FIG. 1 is a view in perspective of the swimming shoe
  • FIG. 2 is a cross-sectional view in increased scale taken I through the mid-section of the shoe shown in FIG. 1;
  • FIG. 1 is a cross-sectional view in increased scale taken I through the mid-section of the shoe shown in FIG. 1;
  • the two components are molded in one piece from a flexible moldable material, such as, natural known or synthetic rubber, or various well known synthetic resins.
  • a rear extension 3 can be provided at the upper portion of the heel of the shoe.
  • the toe portion of shoe 2 preferably has an opening 5 therein to allow for better fir and flow-through of water during use.
  • fin 1 has a double curved surface reminiscent of that of a paddle in a Pclton turbine, wherein two depressions or pouches are formed side by side in the concave face of the scoop.
  • Triangular extensions 7 and 8 divided by indentation 6 extend downwardly from he front and rear portions of the fin.
  • the curved junction line between the fin 1 and the sole 4 of the shoe starts at the extreme back of the heel at a point situated essentially midway between the inside and outside edges of the sole. It then extends obliquely in relation to the sole in order to reach the outer edge of the latter at a central portion and then returns towards the inner edge of the sole near the toe portion of the shoe having the opening 5.
  • the front edge of the fin falls from the front of the shoe along a peripheral curve directed downwardly towards the 70 front and inside of the foot while the back edge falls from the back of the heel along a peripheral curve aimed downwardly and further back while extending towards the inside of the foot. Therefore, at the point of its greatest length, the fin is longer than the shoe.
  • the thickness of the fin increases from the lower edge to the top.
  • the line along which the fin is cut by atransverse plane with respect to the shoe is a smooth line having a radius of curvature which is minimum in the area of the sole of the shoe and increases progressively towards the lower edge.
  • the fin 1 can be folded down under pressure towards the sole of the shoe which enables the swimmer to walk on the ground while wearing a pair. Since the shoe is made of one piece of flexible material such as, rubber, the fin does not tend to lose its shape or break and resumes its original shape when free.
  • the fin can fold under the sole of the shoe when the swimmer walks on the ground.
  • a means of connecting the fin in a folded position under the sole can be devised.
  • a tie normally attached to the top of the shoe and wrapped around the ankle, but which can be wrapped under the fin and attached at the level of the ankle, could be constructed.
  • Other means of tying could also be devised.
  • the fin could also, in an alternate version, be connected to connecting rods or to the outer edge of the sole.
  • a swimming shoe comprising a sole, means for attaching said sole to the wearer's foot, and a fin of flexible material extending downwardly from the under face of the sole, said fin having a concave scoop-shaped surface with its concavity toward the inside of said sole, said fin being joined to said sole along a curved line extending from the middle of the heel portion to the inside edge of the toe of said sole, with the central portion of said joint coinciding with the outer edge of the central portion of said sole, the lower edge of said fin having an indentation of triangular shape in its central portion and forming on both sides of said indentation a pair of obliquely and upwardly extending edge portions.
  • a shoe according to claim 1 wherein the shape of said fin in a transverse cross section taken through the midpoint thereof is defined by a smooth curve, the center of curvature of which lies at a height between said lower edge and said joint, the minimum radius of curvature of said curve being situated closer to the under side of the sole than to the lower edge of said fin.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

A swimming shoe adapted especially to aid in the performance of the breast stroke comprising: a sole, means for attaching the sole to the foot of the wearer and a scoop-shaped fin extending from the underside of the sole. The joint between the fin and the sole extends in substantially the same direction as the longitudinal axis of the sole, and the scoop portion of the fin opens towards the inward side of the wearer''s foot.

Description

United States Patent Mayor 1 June 27, 1972 [54] SWIMMERS SHOE [72] Inventor: Jean Mayor, Lausanne, Switzerland [73] Assignee: Materiaux S.A., Lausanne, Canton of Vaud, Switzerland [22] Filed: March 10, 1970 2! Appl. No.: 18,053
[30] Foreign Application Priority Data March l3, i969 Switzerland ..3829/69 [52] 0.8. CI ..9/309, 9/304 [5 1] Int. Cl. ..A63b 31/10 [58] Field of Search ..9/309, 304
[56] References Cited UNITED STATES PATENTS 3,521,312 7/1970 Gang "9/309 1,590,484 6/1926 Volker ..9/ 304 1,424,207 8/1922 Manning. ....9/ 309 1,983,609 12/1934 Hudson ..9/304 Primary Examiner-Duane A. Reger AttorneyStevens, Davis, Miller & Mosher [57] ABSTRACT A swimming shoe adapted especially to aid in the performance of the breast stroke comprising: a sole, means for attaching the sole to the foot of the wearer and a scoop-shaped fin extending from the underside of the sole. The joint between the fin and the sole extends in substantially the same direction as the iongitudinal axis of the sole, and the scoop portion of the fin opens towards the inward side of the wearer's foot.
5 Claims, 2 Drawing Figures This invention relates to the provision of swimming shoes for aiding those swimming the breast stroke. While the flipper" type swim fin made in the shape of a web foot is will known, a fin of this type handicaps instead of helps the person who, for one reason or another, swims the breast stroke. In fact, the natural motion of the legs cannot be performed normally if the foot is extended by a fin of the above-mentioned type. But, observations show that there are advantages in giving the swimmer doing the breast stroke a shoe which facilitates floating with natural leg motions. These means are, for example, particularly useful during life saving operations or when swimmers must move in the water while carrying loads, or are otherwise restricted in their motions. Further, shoes which facilitate floating with natural leg motions are useful to swimmers during underwater diving expeditions.
It is, accordingly, an object of the present invention to provide a swimming shoe which not only allows the legs to be moved in a natural fashion while one swims the breast stroke but aids in the performance of this maneuver.
It isa further object of this invention to provide a swimming shoe which facilitates floating in the water using natural leg motions.
Another object of this invention is to provide a pair of swimming shoes which accomplish the above objects, each of whichis of one-piece, flexible construction.
Still another object of this invention is to provide a swimming shoe which permits the swimmer to walk on dry land while wearing a pair.
A swimming shoe constructed according to the present invention has a sole portion which is adapted to be attached in any known manner to the foot and a scoop-like fin portion extending downwardly from the underside of the sole. The joint between the fin and thesole extends in the same direction as the longitudinal axis of the latter, and the hollow of the scoop faces inwardly towards the instep portion of the sole.
Further objects and advantages of the present invention will become apparent with reference to the drawings, showing a preferred embodiment thereof, in which:
FIG. 1 is a view in perspective of the swimming shoe;
FIG. 2 is a cross-sectional view in increased scale taken I through the mid-section of the shoe shown in FIG. 1; FIG. 1
shows a scoop-shaped fin l attached to a shoe portion 2 which is adapted to fit the foot of the wearer. Preferably, the two components are molded in one piece from a flexible moldable material, such as, natural known or synthetic rubber, or various well known synthetic resins.
In order to more closely fit the shape and size of the foot, as well as to provide a more secure binding thereto, a rear extension 3 can be provided at the upper portion of the heel of the shoe.
The toe portion of shoe 2 preferably has an opening 5 therein to allow for better fir and flow-through of water during use.
As can been seen from FIG. 1, fin 1 has a double curved surface reminiscent of that of a paddle in a Pclton turbine, wherein two depressions or pouches are formed side by side in the concave face of the scoop.
Triangular extensions 7 and 8 divided by indentation 6 extend downwardly from he front and rear portions of the fin.
The curved junction line between the fin 1 and the sole 4 of the shoe starts at the extreme back of the heel at a point situated essentially midway between the inside and outside edges of the sole. It then extends obliquely in relation to the sole in order to reach the outer edge of the latter at a central portion and then returns towards the inner edge of the sole near the toe portion of the shoe having the opening 5.
The front edge of the fin falls from the front of the shoe along a peripheral curve directed downwardly towards the 70 front and inside of the foot while the back edge falls from the back of the heel along a peripheral curve aimed downwardly and further back while extending towards the inside of the foot. Therefore, at the point of its greatest length, the fin is longer than the shoe.
It can be seen from FIG. 2 that the thickness of the fin increases from the lower edge to the top.
Finally, it is noted with respect to FIG. 2 that the line along which the fin is cut by atransverse plane with respect to the shoe is a smooth line having a radius of curvature which is minimum in the area of the sole of the shoe and increases progressively towards the lower edge.
In operation, when a swimmer makes the normal leg motions of the breast stroke, and the feet are brought together at the end of the motion, a thrust is created through the displacement of water behind. Thanks to the curved shape of the fin I and the indention 6, thrust is considerably increased when the swimmer is wearing the shoe as herein described. Furthermore, while wearing the instant shoes, a swimmer, though heavily laden, can remain afloat without fatigue even while carrying a load or while handicapped in his motions, for example, by his clothes.
Due to its special shape, the fin 1 can be folded down under pressure towards the sole of the shoe which enables the swimmer to walk on the ground while wearing a pair. Since the shoe is made of one piece of flexible material such as, rubber, the fin does not tend to lose its shape or break and resumes its original shape when free.
The configuration shown in the drawings is not the only one conceivable for the fin of a swimming shoe according to the invention. In fact, instead of a double curved surface one could make a fin with a single curved surface, for example, in a cylindrical form or even, if suitable, in a flat surface extending at right angles with the sole. l-Iowever, tests have shown that the type having the double curve represented in the drawings gives better results.
The fin can fold under the sole of the shoe when the swimmer walks on the ground. In order to facilitate this folding ability, a means of connecting the fin in a folded position under the sole can be devised. For example, a tie normally attached to the top of the shoe and wrapped around the ankle, but which can be wrapped under the fin and attached at the level of the ankle, could be constructed. Other means of tying could also be devised.
Finally, instead of being connected to the shoe along a line extending the length of the sole, the fin could also, in an alternate version, be connected to connecting rods or to the outer edge of the sole.
Having thus described my invention, I claim:
1. A swimming shoe comprising a sole, means for attaching said sole to the wearer's foot, and a fin of flexible material extending downwardly from the under face of the sole, said fin having a concave scoop-shaped surface with its concavity toward the inside of said sole, said fin being joined to said sole along a curved line extending from the middle of the heel portion to the inside edge of the toe of said sole, with the central portion of said joint coinciding with the outer edge of the central portion of said sole, the lower edge of said fin having an indentation of triangular shape in its central portion and forming on both sides of said indentation a pair of obliquely and upwardly extending edge portions.
2. A shoe according to claim 1 wherein the shape of said fin in a transverse cross section taken through the midpoint thereof is defined by a smooth curve, the center of curvature of which lies at a height between said lower edge and said joint, the minimum radius of curvature of said curve being situated closer to the under side of the sole than to the lower edge of said fin.
3. The shoe of claim 1 wherein said means for attaching said sole to the wearer's foot is a shoe-shaped member integrally connected to said sole.
4. The shoe of claim 3 wherein an upwardly rising extension is provided at the heel portion of said shoe-shaped member and an opening is provided in the toe is said shoe-shaped member.
5. The shoe of claim 1 in which said fin is adapted to be folded against the underside of said sole in order to allow for walking on dry land.
a t-as:

Claims (7)

1. A swimming shoe comprising a sole, means for attaching said sole to the wearer''s foot, and a fin of flexible material extending downwardly from the under face of the sole, said fin having a concave scoop-shaped surface with its concavity toward the inside of said sole, said fin being joined to said sole along a curved line extending from the middle of the heel portion to the inside edge of the toe of said sole, with the central portion of said joint coinciding with the outer edge of thE central portion of said sole, the lower edge of said fin having an indentation of triangular shape in its central portion and forming on both sides of said indentation a pair of obliquely and upwardly extending edge portions.
2. A shoe according to claim 1 wherein the shape of said fin in a transverse cross section taken through the midpoint thereof is defined by a smooth curve, the center of curvature of which lies at a height between said lower edge and said joint, the minimum radius of curvature of said curve being situated closer to the under side of the sole than to the lower edge of said fin.
2. A shoe according to claim 1 wherein the shape of said fin in a transverse cross section taken through the midpoint thereof is defined by a smooth curve, the center of curvature of which lies at a height between said lower edge and said joint, the minimum radius of curvature of said curve being situated closer to the under side of the sole than to the lower edge of said fin.
3. The shoe of claim 1 wherein said means for attaching said sole to the wearer''s foot is a shoe-shaped member integrally connected to said sole.
3. The shoe of claim 1 wherein said means for attaching said sole to the wearer''s foot is a shoe-shaped member integrally connected to said sole.
4. The shoe of claim 3 wherein an upwardly rising extension is provided at the heel portion of said shoe-shaped member and an opening is provided in the toe is said shoe-shaped member.
5. The shoe of claim 1 in which said fin is adapted to be folded against the underside of said sole in order to allow for walking on dry land.
US18053A 1969-03-13 1970-03-10 Swimmer{3 s shoe Expired - Lifetime US3671987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH382969A CH504213A (en) 1969-03-13 1969-03-13 Swimmer shoe

Publications (1)

Publication Number Publication Date
US3671987A true US3671987A (en) 1972-06-27

Family

ID=4264355

Family Applications (1)

Application Number Title Priority Date Filing Date
US18053A Expired - Lifetime US3671987A (en) 1969-03-13 1970-03-10 Swimmer{3 s shoe

Country Status (10)

Country Link
US (1) US3671987A (en)
AT (1) AT302857B (en)
BE (1) BE747322A (en)
CA (1) CA924342A (en)
CH (1) CH504213A (en)
DE (1) DE2009381C3 (en)
FR (1) FR2038960A5 (en)
GB (1) GB1299492A (en)
NL (1) NL160171C (en)
NO (1) NO124465B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310938A (en) * 1978-02-27 1982-01-19 Dieter Eichler Swimming shoe for breast stroke
US4813668A (en) * 1987-07-28 1989-03-21 Solloway Daniel S Aquatic boot
US5389058A (en) * 1993-10-18 1995-02-14 Torrington Capital Limited Method and apparatus for exercising the lower back
FR2805470A1 (en) * 2000-02-29 2001-08-31 Christian Aussedat Lower leg muscular exerciser flipper having shoe section with lower swim blade section having rigid strips and directly underneath/lengthening foot.
US20030148855A1 (en) * 2002-02-05 2003-08-07 Ryland David E. Apparatus and method for developing a proper swimming whip kick and training the competitive breaststroker
US6851394B1 (en) * 2002-10-16 2005-02-08 Christopher S. Young Boot and harness swimming system for an animal
US9364717B2 (en) 2014-01-16 2016-06-14 Kathleen Davis Swimming fin
US10765916B2 (en) * 2016-04-20 2020-09-08 Raimund Hennemann, Christian Guber, Claudia Kemény, Flap Fin GbR Swim Shoe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19630548C1 (en) * 1996-07-17 1997-11-20 Toan Dat Dipl Ing Tran Shoe for diver or swimmer
DE19654309A1 (en) * 1996-12-24 1997-11-20 Robert Hermann Swimming-shoe with flaps for leg-swimming and breast stroke

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1424207A (en) * 1921-01-28 1922-08-01 William P Manning Legging
US1590484A (en) * 1923-07-27 1926-06-29 Volker Waldemar Device for the augmentation of human swimming performances
US1983609A (en) * 1933-10-16 1934-12-11 Willis T Hudson Swimming shoe
US3521312A (en) * 1968-11-05 1970-07-21 Vitan M Ganev Swim shoe and swim fin assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1424207A (en) * 1921-01-28 1922-08-01 William P Manning Legging
US1590484A (en) * 1923-07-27 1926-06-29 Volker Waldemar Device for the augmentation of human swimming performances
US1983609A (en) * 1933-10-16 1934-12-11 Willis T Hudson Swimming shoe
US3521312A (en) * 1968-11-05 1970-07-21 Vitan M Ganev Swim shoe and swim fin assembly

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310938A (en) * 1978-02-27 1982-01-19 Dieter Eichler Swimming shoe for breast stroke
US4813668A (en) * 1987-07-28 1989-03-21 Solloway Daniel S Aquatic boot
US5389058A (en) * 1993-10-18 1995-02-14 Torrington Capital Limited Method and apparatus for exercising the lower back
FR2805470A1 (en) * 2000-02-29 2001-08-31 Christian Aussedat Lower leg muscular exerciser flipper having shoe section with lower swim blade section having rigid strips and directly underneath/lengthening foot.
US20030148855A1 (en) * 2002-02-05 2003-08-07 Ryland David E. Apparatus and method for developing a proper swimming whip kick and training the competitive breaststroker
US6866615B2 (en) * 2002-02-05 2005-03-15 David E. Ryland Apparatus and method for developing a proper swimming whip kick and training the competitive breaststroker
US6851394B1 (en) * 2002-10-16 2005-02-08 Christopher S. Young Boot and harness swimming system for an animal
WO2004071587A2 (en) * 2003-02-05 2004-08-26 Ryland David E Swimming whip kick apparatus and method
WO2004071587A3 (en) * 2003-02-05 2005-02-24 David E Ryland Swimming whip kick apparatus and method
US9364717B2 (en) 2014-01-16 2016-06-14 Kathleen Davis Swimming fin
US10765916B2 (en) * 2016-04-20 2020-09-08 Raimund Hennemann, Christian Guber, Claudia Kemény, Flap Fin GbR Swim Shoe

Also Published As

Publication number Publication date
FR2038960A5 (en) 1971-01-08
DE2009381A1 (en) 1970-10-01
DE2009381C3 (en) 1981-07-02
NL160171C (en) 1979-10-15
NL7003518A (en) 1970-09-15
NL160171B (en) 1979-05-15
CH504213A (en) 1971-03-15
BE747322A (en) 1970-08-17
NO124465B (en) 1972-04-24
AT302857B (en) 1972-10-25
GB1299492A (en) 1972-12-13
DE2009381B2 (en) 1980-11-20
CA924342A (en) 1973-04-10

Similar Documents

Publication Publication Date Title
US2889563A (en) Swim flipper
US5924902A (en) Amphibious swimming and walking shoe
US3671987A (en) Swimmer{3 s shoe
US4521220A (en) Swim fin for breaststroke swimmers
KR102007892B1 (en) Flipper shoes
US5356323A (en) Closed shoe swim fin
WO2016045444A1 (en) Rubber swimming fin
US5896676A (en) Wade fishing leg gaiter
AU674914B2 (en) Swim fin with variable stiffness
US3107372A (en) Swimming shoes
US5087217A (en) Swimming shoe
US3432868A (en) Float-equipped wading boots with propelling fins
US3867734A (en) Swimming flipper
US20040209534A1 (en) Swim fin with fabric foot pocket
US5899781A (en) Swim fin incorporating pronation compensation structure
US2172938A (en) Swimming sandal
US10478672B1 (en) Walkable water shoe with incorporated swim fin appendage
JP2016036533A (en) Auxiliary tool for underwater propulsion, and underwater clothing with the same
WO1997035644A1 (en) Amphibious footwear
US5273469A (en) Composite swim fin with cantilevered heel
JPH0434722Y2 (en)
US2073570A (en) Swimming shoe
US671378A (en) Swimming-shoe.
US1674801A (en) Swimming appliance
US9649535B2 (en) Lower leg and boot swimming fin system