CA1058647A - Ski traction device with tensioned pivotal traction pins - Google Patents
Ski traction device with tensioned pivotal traction pinsInfo
- Publication number
- CA1058647A CA1058647A CA305,578A CA305578A CA1058647A CA 1058647 A CA1058647 A CA 1058647A CA 305578 A CA305578 A CA 305578A CA 1058647 A CA1058647 A CA 1058647A
- Authority
- CA
- Canada
- Prior art keywords
- ski
- traction
- section
- base plate
- clamp head
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C7/00—Devices preventing skis from slipping back; Ski-stoppers or ski-brakes
- A63C7/08—Stoppage blades attachable to the skis in such manner that these blades are permanently in the operative position
Landscapes
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
Abstract of the Disclosure A ski traction device particularly, but not exclus-ively, for use with a cross-country ski. The traction device comprises a unitary base plate which is securable to a top face of a ski. A traction element cooperates with the base plate and has at least one traction pin, a clamp head and a seat section. The traction element is hingeably retainable by the base plate for pivotal movement to permit arcuate dis-placement of the traction pin adjacent a side of the ski when the base plate is secured to the top face of the ski. The seat section restricts the arcuate displacement of the traction pin to an axis extending substantially transverse to the plane of the top face of the ski. A catch is formed by an upstanding flexible section of the base plate for releasably retaining the clamp head therein. A spring action is provided with the traction element to urge the clamp head away from the catch of the base plate.
Description
-The present invention relates to a traction device for mounting on a ski, preferably but not exclusively, of the cross country type whereby the traction device may be engaged in a position to enhance the traction of the ski on a ground surface.
Various types of traction devices have been provided for skis such as disclosed in U. S. Patent 3,899,184, issued on August 12, 1975 to George S, Haddad. However, such traction devices are complex in cons~ruction, have many moving parts and therefore are subject to ~lore malfunctions and failures and easilyclogged up with snow and ice. Also such devices are relatively expensive to fabricate because they require many parts, weld joints and difficult assembly.
It is a feature of the present invention to provide a ski traction device of relatively simple construction, easy to construct and install A further feature of the present invention is to provide a ski traction device which is of light-weight con-struction, has very few parts and therefore easy to operate ?O and subject to less malfunctions.
According to the above features, from a broad aspect, the present invention provides a ski traction device parti-cularly, but not exclusively, for use with a cross-country ski.
The traction device comprises a unitary base plate which is securable to a top face of a ski. A traction element co-operates with the base plate and has at least one traction pin, a clamp head and a seat section. The traction element is hingeably retainable by the base plate for pivotal move-ment to permit arcuate displacement of the traction pin '0 adjacent a side of the ski when the base plate is secured to the top face o~ the ski. The seat section restricts the arcuate
Various types of traction devices have been provided for skis such as disclosed in U. S. Patent 3,899,184, issued on August 12, 1975 to George S, Haddad. However, such traction devices are complex in cons~ruction, have many moving parts and therefore are subject to ~lore malfunctions and failures and easilyclogged up with snow and ice. Also such devices are relatively expensive to fabricate because they require many parts, weld joints and difficult assembly.
It is a feature of the present invention to provide a ski traction device of relatively simple construction, easy to construct and install A further feature of the present invention is to provide a ski traction device which is of light-weight con-struction, has very few parts and therefore easy to operate ?O and subject to less malfunctions.
According to the above features, from a broad aspect, the present invention provides a ski traction device parti-cularly, but not exclusively, for use with a cross-country ski.
The traction device comprises a unitary base plate which is securable to a top face of a ski. A traction element co-operates with the base plate and has at least one traction pin, a clamp head and a seat section. The traction element is hingeably retainable by the base plate for pivotal move-ment to permit arcuate displacement of the traction pin '0 adjacent a side of the ski when the base plate is secured to the top face o~ the ski. The seat section restricts the arcuate
- 2 - ~
q~
1058~;47 displa¢ement of the traction pin to an axis extending sub-stantially transverse to the plane of the top face of the ski. A catch is formed by an upstanding flexible section of the base plate for releasably retaining the clamp head therein. A spring action is provided with the traction element to urge the clamp head away from the catch of the base pla~e.
BRIEF DESCRIPTION OF DRAWINGS
A preferred embodiment of the present invention will now be described with reference to the accompanying drawings in which:-FIGURE 1 is a perspective view illustrating a preferred position for mounting the traction device on a cross-country ski, ~5 FIGURE 2 is a top view of the traction device mounted on a ski, FIGURE 3 is a side section view along section lines III-III of Figure 2, and FIGURE 4 is a perspective view of the traction ~O element.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring now to the drawings, there is shown generally at 10 the traction device of the present inven-tion and consisting essentially of a unitary base plate 11 and a traction element 12 associated therewith and spring biased by a spring means herein coil spring 9 secured to the base plate 11. As shown in Figure 1, the base plate 11 is mounted on a top surface 13 of a cross-country ski 14 by means of screws 15 located in screw holes 15' at desirable positions in the base plate 11. Preferably the traction device 10 is mounted forwardly of the standard ski ~., ' ~058647 binding 16 whereby it can be more easily operated by the skier.
Referring now more specifically to Figures 2,
q~
1058~;47 displa¢ement of the traction pin to an axis extending sub-stantially transverse to the plane of the top face of the ski. A catch is formed by an upstanding flexible section of the base plate for releasably retaining the clamp head therein. A spring action is provided with the traction element to urge the clamp head away from the catch of the base pla~e.
BRIEF DESCRIPTION OF DRAWINGS
A preferred embodiment of the present invention will now be described with reference to the accompanying drawings in which:-FIGURE 1 is a perspective view illustrating a preferred position for mounting the traction device on a cross-country ski, ~5 FIGURE 2 is a top view of the traction device mounted on a ski, FIGURE 3 is a side section view along section lines III-III of Figure 2, and FIGURE 4 is a perspective view of the traction ~O element.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring now to the drawings, there is shown generally at 10 the traction device of the present inven-tion and consisting essentially of a unitary base plate 11 and a traction element 12 associated therewith and spring biased by a spring means herein coil spring 9 secured to the base plate 11. As shown in Figure 1, the base plate 11 is mounted on a top surface 13 of a cross-country ski 14 by means of screws 15 located in screw holes 15' at desirable positions in the base plate 11. Preferably the traction device 10 is mounted forwardly of the standard ski ~., ' ~058647 binding 16 whereby it can be more easily operated by the skier.
Referring now more specifically to Figures 2,
3 and 4, the base plate 11 is provided with three spaced apart screw holes 15' for receiving the screws 15 therein to fasten the base plate 11 on the top surface of a ski.
The base plate 11 is formed of a flexible material such as polymeric material or flexible tempered metallic sheet material and defines a catch 17 in a front upstanding portion of the base plate for releasably retaining a clamp head 18 forming part of the traction element 12. m e catch 17 is constituted by an upstanding flexible section of the base plate shaped to define a mouth opening of elongated cavity 25 immediately above the top surface 19 of the base plate 11 whereby the catch applies clamping pressure to the clamp head 18 when positioned in the cavity 25. As shown, the cavity 25has a stop qhoulder 25' to retain the clamp head 18.
The coil spring 9 is secured to the top face of the plate 11 by screw 15 which also secures the plate to the top surface 13 of the sXi 14. The spring 9 has an up-wardly extending section 9' with an end engaging section 9"
which engages the rear surface 18' of the clamp head 18 to apply a pressure against it, even after release of the head 18 from the catch 17 so that the traction pins con-stantly tend to assume a vertical position as shown in Figure 3 when the clamp head 18 is in a catch engaged position, as shown in phantom lines 12', in Figure 3, the section 9" of the spring is applying an upward pressure sufficient to cause the head 18 to be displaced out of engagement with the cavity 25 when the catch 17 is dis-placed outwardly therefrom.
The top end of the catch 17 defines an engage-able tab 20 whereby to permit application of downward pressure to flex the upstanding section or catch 17 to permit release and displacement of the clamp head 18 by the spring 9, as described above. A cavity or through bore 21 is provided in the tab 20 to receive an end of a ski pole (not shown) whereby to facilitate transferring the downward pre~sure onto the engageable tab 20 to cause flexing of the catch 17 to release the clamp head 18.
. As illustrated more clearly in Figure 4, the traction element 12 is formed of a rigid heat treated steel or equivalent wire member shaped at both ends to define a first section to constitute two opposed traction pins 30. The wire is then bent at right angles to each traction pin 30 in a second section thereof to fonm a pivot rod section 31. The wire is then shaped into a third section from the end of the pivot rod section, at substan-tially 90 angle rearwardly of the section 31 at 34 and then upwardly at 35 to consitute`the clamp head 18. This third section has two parallel legs 32 interconnected at a common end by a bridge section 33 which defines the clamp head 18 and the other end of the legs 32 are each connected to a respective one of the pivot rod sections 31.
As shown in Figures 2 and 3, the pivot rod sections 31 are retained in axially aligned respective sleeve 34 formed integrally with the base plate 11 and extending above the top surface 19 of the base plate along respective sides thereof to retain the arms 31 above the surface 13 of the ski, see Figure 3. The pivot rod sections 31 are retained in the sleeves 34 for axial rotation about their common long axis 35. When the clamp ~OS8647 head 18 is released from engagement with the catch 17 by flexing the catch 17 outwardly, the traction element will be displaced in the direction of arrow 36 (see Figure 2) to assume a position where the upward section 32 of the clamp head section 18 is not quite perpendicular to the top surface 13 of the ski 14 due to resistance of the ground surface. However, as the ski is displaced in the direction of arrow 38, the engaging ends 30', which are crimped to form an enlargement engage into the surface beneath the ski to cause the clamp head section 18 to assume a vertical position as shown in Figure 3. A flat seat surface 39 is provided under the clamp head section 18 to transfer the force in the traction element 12 onto the surface 19 of the plate 11. Also, the surface 39 prevents the traction pins 30 from being angulated forwardly past the transverse vertical axis of the ski (the pins 31 in a downward vertical position relative to the plane of the top surface 13 of the ski).
In operation, in order to disengage the traction element 12 to bring it to a rest position, it is neces-sary to press down on the clamp head section 18, by apply-ing the end of a ski pole (not shown) in a punch hole or cavity 40 formed in the section 18, until it snaps into retention in the elongate cavity 25 of the catch 17.
Depending on the "softness" of the snow/ice surface on which the ski is resting, it could be necessary to slide the ski forward (always remaining in contact with the snow surface) in the direction of arrow 8 to move the pin legs 32 (partially) towards the horizontal position to facilitate positioning the end of a ski pole in the cavity 40. The traction pins 30 are now facing in a -~058647 position substantially parallel to the long axis of the ski 14 and free from engagement. To engage the pins 30 in a surface below the ski 14, the end of a ski pole (not shown) is inserted in the bore 21 of the tab 20 and down-ward pressure is applied on the catch 17 to release the clamp head 18 under the action of the spring 9 as dec- -cribed above and the pins 30 will engage to provide posi-tive traction of the ski as these traction pins are longer than the thicknes~ of the ski. As the skier displaces the ski, the force applied on the pin 30 is transferred to the top of the plate 11 as previously described.
It i5 within the ambit of the present invention to cover any obvious modifications of the examples of the preferred embodiment described hereinabove, provided such modifications fall within the scope of the invention as broadly defined by the appended claims.
The base plate 11 is formed of a flexible material such as polymeric material or flexible tempered metallic sheet material and defines a catch 17 in a front upstanding portion of the base plate for releasably retaining a clamp head 18 forming part of the traction element 12. m e catch 17 is constituted by an upstanding flexible section of the base plate shaped to define a mouth opening of elongated cavity 25 immediately above the top surface 19 of the base plate 11 whereby the catch applies clamping pressure to the clamp head 18 when positioned in the cavity 25. As shown, the cavity 25has a stop qhoulder 25' to retain the clamp head 18.
The coil spring 9 is secured to the top face of the plate 11 by screw 15 which also secures the plate to the top surface 13 of the sXi 14. The spring 9 has an up-wardly extending section 9' with an end engaging section 9"
which engages the rear surface 18' of the clamp head 18 to apply a pressure against it, even after release of the head 18 from the catch 17 so that the traction pins con-stantly tend to assume a vertical position as shown in Figure 3 when the clamp head 18 is in a catch engaged position, as shown in phantom lines 12', in Figure 3, the section 9" of the spring is applying an upward pressure sufficient to cause the head 18 to be displaced out of engagement with the cavity 25 when the catch 17 is dis-placed outwardly therefrom.
The top end of the catch 17 defines an engage-able tab 20 whereby to permit application of downward pressure to flex the upstanding section or catch 17 to permit release and displacement of the clamp head 18 by the spring 9, as described above. A cavity or through bore 21 is provided in the tab 20 to receive an end of a ski pole (not shown) whereby to facilitate transferring the downward pre~sure onto the engageable tab 20 to cause flexing of the catch 17 to release the clamp head 18.
. As illustrated more clearly in Figure 4, the traction element 12 is formed of a rigid heat treated steel or equivalent wire member shaped at both ends to define a first section to constitute two opposed traction pins 30. The wire is then bent at right angles to each traction pin 30 in a second section thereof to fonm a pivot rod section 31. The wire is then shaped into a third section from the end of the pivot rod section, at substan-tially 90 angle rearwardly of the section 31 at 34 and then upwardly at 35 to consitute`the clamp head 18. This third section has two parallel legs 32 interconnected at a common end by a bridge section 33 which defines the clamp head 18 and the other end of the legs 32 are each connected to a respective one of the pivot rod sections 31.
As shown in Figures 2 and 3, the pivot rod sections 31 are retained in axially aligned respective sleeve 34 formed integrally with the base plate 11 and extending above the top surface 19 of the base plate along respective sides thereof to retain the arms 31 above the surface 13 of the ski, see Figure 3. The pivot rod sections 31 are retained in the sleeves 34 for axial rotation about their common long axis 35. When the clamp ~OS8647 head 18 is released from engagement with the catch 17 by flexing the catch 17 outwardly, the traction element will be displaced in the direction of arrow 36 (see Figure 2) to assume a position where the upward section 32 of the clamp head section 18 is not quite perpendicular to the top surface 13 of the ski 14 due to resistance of the ground surface. However, as the ski is displaced in the direction of arrow 38, the engaging ends 30', which are crimped to form an enlargement engage into the surface beneath the ski to cause the clamp head section 18 to assume a vertical position as shown in Figure 3. A flat seat surface 39 is provided under the clamp head section 18 to transfer the force in the traction element 12 onto the surface 19 of the plate 11. Also, the surface 39 prevents the traction pins 30 from being angulated forwardly past the transverse vertical axis of the ski (the pins 31 in a downward vertical position relative to the plane of the top surface 13 of the ski).
In operation, in order to disengage the traction element 12 to bring it to a rest position, it is neces-sary to press down on the clamp head section 18, by apply-ing the end of a ski pole (not shown) in a punch hole or cavity 40 formed in the section 18, until it snaps into retention in the elongate cavity 25 of the catch 17.
Depending on the "softness" of the snow/ice surface on which the ski is resting, it could be necessary to slide the ski forward (always remaining in contact with the snow surface) in the direction of arrow 8 to move the pin legs 32 (partially) towards the horizontal position to facilitate positioning the end of a ski pole in the cavity 40. The traction pins 30 are now facing in a -~058647 position substantially parallel to the long axis of the ski 14 and free from engagement. To engage the pins 30 in a surface below the ski 14, the end of a ski pole (not shown) is inserted in the bore 21 of the tab 20 and down-ward pressure is applied on the catch 17 to release the clamp head 18 under the action of the spring 9 as dec- -cribed above and the pins 30 will engage to provide posi-tive traction of the ski as these traction pins are longer than the thicknes~ of the ski. As the skier displaces the ski, the force applied on the pin 30 is transferred to the top of the plate 11 as previously described.
It i5 within the ambit of the present invention to cover any obvious modifications of the examples of the preferred embodiment described hereinabove, provided such modifications fall within the scope of the invention as broadly defined by the appended claims.
Claims (7)
1. A ski traction device comprising a unitary base plate, means for mounting said base plate to a top face of a ski; a traction element having at least one traction pin, a clamp head and a seat section; said traction element being hingeably retainable by said base plate for pivotal movement to permit arcuate displacement of said at least one traction pin adjacent a side of a ski when said base plate is secured to said top face of said ski, said seat section restricting said arcuate displacement of said traction pin to an axis extending substantially transverse to the plane of said top face of said ski, a catch formed by an upstanding flexible section of said base plate for releasably retaining said clamp head therein, and tension means urging said clamp head away from said catch.
2, A ski traction device as claimed in claim 1, wherein said upstanding flexible section of said base plate is shaped to define a mouth opening to resiliently clamp said clamp head therein.
3, A ski traction device as claimed in claim 2, wherein said upstanding flexible section further defines an engageable tab to permit application of pressure to said flexible section to permit said tension means to urge said clamp head away from said mouth opening.
4, A ski traction device as claimed in claim 3, wherein a cavity is provided in a top face of said engageable tab to receive an end of a ski pole to transfer downward pressure thereto.
5. A ski traction device as claimed in claim 2, wherein said traction element is formed by a single rigid wire member shaped to define a first section constituting said traction pin, a second section extending from a first end thereof at right angles to said first section to form a pivot rod section, and a third section having a first part defining said seat section and extending rearwardly at right angles from an opposed end of said second section and a second part extending upwardly at right angles to constitute said clamp head.
6, A ski traction device as claimed in claim 5, wherein there are two traction pins formed by said rod-like member and two pivot rod sections, said pivot rod sections being inter-connected by said third section whereby said two pivot rod sections lie coaxially with said two traction pins disposed on a respective side of a ski.
7. A ski traction device as claimed in claim 6, wherein said two pivot rod sections are retained in sleeves on said base plate for axial rotation about their long axis, said second part of said third section extending substantially parallel to said traction pins, said tension means being a coil spring secured on said base plate between said sleeves and said catch and acting on said third section to urge said clamp head away from said catch when positioned therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA305,578A CA1058647A (en) | 1978-06-15 | 1978-06-15 | Ski traction device with tensioned pivotal traction pins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA305,578A CA1058647A (en) | 1978-06-15 | 1978-06-15 | Ski traction device with tensioned pivotal traction pins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1058647A true CA1058647A (en) | 1979-07-17 |
Family
ID=4111701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA305,578A Expired CA1058647A (en) | 1978-06-15 | 1978-06-15 | Ski traction device with tensioned pivotal traction pins |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1058647A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4884822A (en) * | 1988-04-11 | 1989-12-05 | Boisselle Rene P | Ski spurs |
-
1978
- 1978-06-15 CA CA305,578A patent/CA1058647A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4884822A (en) * | 1988-04-11 | 1989-12-05 | Boisselle Rene P | Ski spurs |
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