CA1041294A - Sole for cross-country ski boot - Google Patents
Sole for cross-country ski bootInfo
- Publication number
- CA1041294A CA1041294A CA251,119A CA251119A CA1041294A CA 1041294 A CA1041294 A CA 1041294A CA 251119 A CA251119 A CA 251119A CA 1041294 A CA1041294 A CA 1041294A
- Authority
- CA
- Canada
- Prior art keywords
- sole
- recess
- heel
- ridges
- cross
- 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
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B5/00—Footwear for sporting purposes
- A43B5/04—Ski or like boots
- A43B5/0411—Ski or like boots for cross-country
Abstract
ABSTRACT OF THE DISCLOSURE
The sole of a cross-country ski boot or shoe is pro-vided with a recess in the front and possibly in the heel portion thereof, with longitudinally extending triangular ridges in the recess for forcing snow or ice toward the outside edges of a ski.
The sole of a cross-country ski boot or shoe is pro-vided with a recess in the front and possibly in the heel portion thereof, with longitudinally extending triangular ridges in the recess for forcing snow or ice toward the outside edges of a ski.
Description
`~4~;2~4 This invention relates to a sole for an article of foot-wear, and in particular to a sole for a cross-country ski boot or shoe.
Presently available cross-country ski boots or shoes have relatively smooth bottom surfaces with three small cavities near the front end thereof for engaging the pins normally found on the toe plate of cross-country ski bindings. Most, if not all, cross-country skiers experience the problem of snow buildup on the sole of the ski boot or shoe in the area of the ball of the foot, partic-ularly when skiing in wet snow. The snow becomes compacted, forming a hard, sometimes icy mass, which causes discomfort-to the skier, often to such an extent that it is necessary to remove the skis and - dislodge accumulated snow or ice from the sole of the boot or shoe.
The same problem may arise in the heel area of the sole, but to a lesser extent.
The object of the present invention is to provide a sole .
for a cross-country ski boot or shoe which reduces or eliminates ~,~ the problem of snow buildup between the sole and ski, particularly in the area of the ball of the foot.
: ~
~- 20 ~ccordingly, the present invention relates to a sole for a cross-country ski boot or shoe including a front portion; a heel;
a central recess in the bottom surface of the front portion; and a plurality of longitudinally extending ridges in the recess for pushing snow or ice outwardly towards the sides of the sole when in use.
More specifically, the ridges in the recess are of tri-~ angular cross-sectional configuration, the verticies of the ridges - being flush with the outer surface of the sole. The ridges include a central ridge the outer vertex of which is aligned with the long-itudinal axis of a ski when in use, and which is in the form of an isosceles triangle, the triangles defined by the ridges on each side thereof having an inner side which slopes slightly outwardly towards - 1 - ~
L2~4 its associated outer edge of the sole and an outer side sloping in the opposite direction. The grooves mentioned above are defined by the sides of adjacent trianyles.
A similar arrangement of recess and ridges can be provided in the heel of the boot or shoe for preventing the accumulation of snow beneath the heel.
In use because of their shape, the ridges cause snow or ice to be separated into relatively small clumps, i.e. prevent the formation of a large lump of snow or ice1 and push the snow or ice to the outer edges of the sole where the snow or ice can slide from the ski. If the snow accumulates in the grooves between the ridges it ultimately becomes compacted to an ice-like mass, which breaks and falls as the ski moves forward by virtue of the flexing of th~
sole during skiing.
Because there is no flexing i.e. bending of the heel por-tion of the sole during skiing, any heel or at least that portion of the heel incorporating the grooves is preferably formed of a softer material than the remainder of the sole, whereby a flexing occurs when the heel contacts the ski.
Presently available cross-country ski boots or shoes have relatively smooth bottom surfaces with three small cavities near the front end thereof for engaging the pins normally found on the toe plate of cross-country ski bindings. Most, if not all, cross-country skiers experience the problem of snow buildup on the sole of the ski boot or shoe in the area of the ball of the foot, partic-ularly when skiing in wet snow. The snow becomes compacted, forming a hard, sometimes icy mass, which causes discomfort-to the skier, often to such an extent that it is necessary to remove the skis and - dislodge accumulated snow or ice from the sole of the boot or shoe.
The same problem may arise in the heel area of the sole, but to a lesser extent.
The object of the present invention is to provide a sole .
for a cross-country ski boot or shoe which reduces or eliminates ~,~ the problem of snow buildup between the sole and ski, particularly in the area of the ball of the foot.
: ~
~- 20 ~ccordingly, the present invention relates to a sole for a cross-country ski boot or shoe including a front portion; a heel;
a central recess in the bottom surface of the front portion; and a plurality of longitudinally extending ridges in the recess for pushing snow or ice outwardly towards the sides of the sole when in use.
More specifically, the ridges in the recess are of tri-~ angular cross-sectional configuration, the verticies of the ridges - being flush with the outer surface of the sole. The ridges include a central ridge the outer vertex of which is aligned with the long-itudinal axis of a ski when in use, and which is in the form of an isosceles triangle, the triangles defined by the ridges on each side thereof having an inner side which slopes slightly outwardly towards - 1 - ~
L2~4 its associated outer edge of the sole and an outer side sloping in the opposite direction. The grooves mentioned above are defined by the sides of adjacent trianyles.
A similar arrangement of recess and ridges can be provided in the heel of the boot or shoe for preventing the accumulation of snow beneath the heel.
In use because of their shape, the ridges cause snow or ice to be separated into relatively small clumps, i.e. prevent the formation of a large lump of snow or ice1 and push the snow or ice to the outer edges of the sole where the snow or ice can slide from the ski. If the snow accumulates in the grooves between the ridges it ultimately becomes compacted to an ice-like mass, which breaks and falls as the ski moves forward by virtue of the flexing of th~
sole during skiing.
Because there is no flexing i.e. bending of the heel por-tion of the sole during skiing, any heel or at least that portion of the heel incorporating the grooves is preferably formed of a softer material than the remainder of the sole, whereby a flexing occurs when the heel contacts the ski.
2~ The invention will now be described in greater detail with reference to the accompanying drawings, which illustrate preferxed embodiments of the invention, and wherein:
Figure 1 is an elevation view of a sole for a cross-countr~ ski boot (shown in phantom outline) in accordance with the present invention;
Figure 2 is a bottom view of the front portion of the sole of Fig. 1, the heel portion being shown in phantom outline;
Figure 3 is a cross-sectional view taken along line III-III of Fig. 2 or 4.
Figure 4, which appears on the third sheet of drawings; is a bottom view of a second embodiment of the invention;
Figure 5 is a cross-sectional view taken along line V-V
~1~4~99~ ~
of Fig. 4; and ~ igure 6 is a cross-sectional view taken along line VI-VI of Fig. 4.
Referring to the drawings and in particular Figs. 1 and 2, a sole generally indicated at 1 is normally molded or glued onto the bottom of an upper 2. The sole 1 is formed of a plastics material, such as polyvinyl chloride or rubber. However, the type of material used in the sole is not of critical importance, and the invention would still function if other materials were used.
The problem to be solved with the sole of the invention is to prevent the accumulation of snow or ice in an area 4 of a front portion 5 of the sole 1. The front end of the sole 1 is provided with the usual cavities 6 for engaging the pins normally used on cross-country ski bindings for retaining the boot in position.
In order to prevent the buildup of snow or ice in the area 4 of the sole 1, a plurality of elonyated, longitudinally ` extending grooves 8 are provided in such area. The grooves 8 are formed by providing a recess 9 (Fig~ 5) in the front portion 5 of the sole 1 ~ith a plurality of longitudinally extending ridges 10 in such recess. The recess 9 has a straight front edge 12, and ~ rear and side edges defined by a single curve 13, which at the - sides is approximately parallel to the side edges 15 and 16 of the sole 1. Since the sole is produced in a single molding step, no recess without the ridges ever exists; however, for simplicity of description reference is made to the recess, the area 4 of the sole as produced having the appearance of a recess with longitudinally extending triangular ridges 10 therein.
As shown in Fig. 3, the outer verticies 15 of the tri-angular ridges 10 lie in the same plane as bottom surface 17 of the front portion 5 of the sole 1. While the angles definedby the verticies of the triangular ridges lOwith respect to the vertical or horizon-~41299~
tal are not critical, it should be noted that the central ridge 18has sides 20 which slope in opposite directions towards the sides of the sole when the sole is inverted. In this case, by "central"
with respect to the ridge 18 is meant th~t the outer vertex of the ridge 18 ~he longitudinally extending portion of section line V-V
in Fig~ 4) lies above the longitudinal axis of the ski when in use.
Thus, the "centre" of the sole bottom referred to hereinafter is a line extendin~ longitudinally of the sole and loca~ed directly above the longitudinal axis of a ski when in use, assuming, of ~ 10 course, that the toe binding and consequently the boot are properly - positioned on the ski. The angle at the outer vertex of the ridge 18 is 100. The inner sides 22 of the remaining ridges 10 slope slightly towards the centre of the sole bottom when the sole is inverted. The angle between a~vertical line through bottom 23 of a groove 8 between adjacent ridges 10 and an inner side 22 of an adjacent ridge 25 is 10. The outer sides 26 of each ridge 25 has the same slope and direction as the nearest side 20 of the central ridge 18. The sides 27 of the recess have the same slope and direction as the inner sides of the ridges 25, i.e. they slope away from the centre of the recess from the bottom of the last groove toward the side edges of the sole. The front and rear ends 29 and 30, respectively of the recess slope away from the centre of the recess.
As shown in Figs. 4 to 6 and mentioned above, a similar arrangement of a recess and ridges can be provided in the heel of the boot. In the sole of Figs. 4 to 6, the front portion 5 of the sole 1 is provided with pin engaging cavities 6, and longitudinally extending grooves 8 defined by the recess 9 and the ridges 10. The area 32 around the recess 9 is roughenedr i.e. provided with small ~ridges, ~- hut the feature of the sole is optional. It will also be noted that a sole area 33 immediately in front of the recess 9 is smooth; such area normally being used for marking or labelling the product. A shallow, narrow groove 35 extends from the one side of the rear of the instep 36 of the sole around the recess 9 to the other side of the instep for receiving stitching for interconnecting the .
sole to an upper 2. A smooth ridge 37 extends rearwardly from the ~.
back edge of the recess 9 to a heel 38. At its front end 39, such - ri.dge 37 is flush with the bottom surface of the front portion 5 of the sole, and increases in:height rearwardly to the heel. The side edges 41 of the ridge 37 are rounded, so that the ridge promotes the flow of snow or ice away from the centre of the sole. The ~. smooth bottom surface of the ridge 37 can also be used for identify-ing markings.
~` ~ The heel 38-has a rearwardly inclined front face 43, with bevelled side edges 44. The heel is provided with a recess 47 over most of i~s bottom area, the remainder of the heel bottom being ;. provided with small pyramidal projections and a low peripheral flange 49. The recess 47 includes ridges 50 defining grooves 51 similar in shape to the grooves in the front recess 9,~but fewer in number.
: The ridges 50 function in exactly the same manner as such front ridges.
Because there is no fiexing of the heel during skiing, the heel 38 or at least that portion of the heel containing the ~-~ ridges 50 is formed of a more resilient material than the remainder ~:~ of the sole. For example, if the sole is formed of material having a Shore hardness of 60 to 65, the heel is formed of material having a Shore hardness of 50 to 55. Thus during skiing, as the bottom of the heel 38 engages the ski, or snow or ice between the ski and sole, the area of the heel containing the ridges 50 flexes to force the snow or ice outwardly towards the sides of the ski in the same manner as the front ridges 10.
:'
Figure 1 is an elevation view of a sole for a cross-countr~ ski boot (shown in phantom outline) in accordance with the present invention;
Figure 2 is a bottom view of the front portion of the sole of Fig. 1, the heel portion being shown in phantom outline;
Figure 3 is a cross-sectional view taken along line III-III of Fig. 2 or 4.
Figure 4, which appears on the third sheet of drawings; is a bottom view of a second embodiment of the invention;
Figure 5 is a cross-sectional view taken along line V-V
~1~4~99~ ~
of Fig. 4; and ~ igure 6 is a cross-sectional view taken along line VI-VI of Fig. 4.
Referring to the drawings and in particular Figs. 1 and 2, a sole generally indicated at 1 is normally molded or glued onto the bottom of an upper 2. The sole 1 is formed of a plastics material, such as polyvinyl chloride or rubber. However, the type of material used in the sole is not of critical importance, and the invention would still function if other materials were used.
The problem to be solved with the sole of the invention is to prevent the accumulation of snow or ice in an area 4 of a front portion 5 of the sole 1. The front end of the sole 1 is provided with the usual cavities 6 for engaging the pins normally used on cross-country ski bindings for retaining the boot in position.
In order to prevent the buildup of snow or ice in the area 4 of the sole 1, a plurality of elonyated, longitudinally ` extending grooves 8 are provided in such area. The grooves 8 are formed by providing a recess 9 (Fig~ 5) in the front portion 5 of the sole 1 ~ith a plurality of longitudinally extending ridges 10 in such recess. The recess 9 has a straight front edge 12, and ~ rear and side edges defined by a single curve 13, which at the - sides is approximately parallel to the side edges 15 and 16 of the sole 1. Since the sole is produced in a single molding step, no recess without the ridges ever exists; however, for simplicity of description reference is made to the recess, the area 4 of the sole as produced having the appearance of a recess with longitudinally extending triangular ridges 10 therein.
As shown in Fig. 3, the outer verticies 15 of the tri-angular ridges 10 lie in the same plane as bottom surface 17 of the front portion 5 of the sole 1. While the angles definedby the verticies of the triangular ridges lOwith respect to the vertical or horizon-~41299~
tal are not critical, it should be noted that the central ridge 18has sides 20 which slope in opposite directions towards the sides of the sole when the sole is inverted. In this case, by "central"
with respect to the ridge 18 is meant th~t the outer vertex of the ridge 18 ~he longitudinally extending portion of section line V-V
in Fig~ 4) lies above the longitudinal axis of the ski when in use.
Thus, the "centre" of the sole bottom referred to hereinafter is a line extendin~ longitudinally of the sole and loca~ed directly above the longitudinal axis of a ski when in use, assuming, of ~ 10 course, that the toe binding and consequently the boot are properly - positioned on the ski. The angle at the outer vertex of the ridge 18 is 100. The inner sides 22 of the remaining ridges 10 slope slightly towards the centre of the sole bottom when the sole is inverted. The angle between a~vertical line through bottom 23 of a groove 8 between adjacent ridges 10 and an inner side 22 of an adjacent ridge 25 is 10. The outer sides 26 of each ridge 25 has the same slope and direction as the nearest side 20 of the central ridge 18. The sides 27 of the recess have the same slope and direction as the inner sides of the ridges 25, i.e. they slope away from the centre of the recess from the bottom of the last groove toward the side edges of the sole. The front and rear ends 29 and 30, respectively of the recess slope away from the centre of the recess.
As shown in Figs. 4 to 6 and mentioned above, a similar arrangement of a recess and ridges can be provided in the heel of the boot. In the sole of Figs. 4 to 6, the front portion 5 of the sole 1 is provided with pin engaging cavities 6, and longitudinally extending grooves 8 defined by the recess 9 and the ridges 10. The area 32 around the recess 9 is roughenedr i.e. provided with small ~ridges, ~- hut the feature of the sole is optional. It will also be noted that a sole area 33 immediately in front of the recess 9 is smooth; such area normally being used for marking or labelling the product. A shallow, narrow groove 35 extends from the one side of the rear of the instep 36 of the sole around the recess 9 to the other side of the instep for receiving stitching for interconnecting the .
sole to an upper 2. A smooth ridge 37 extends rearwardly from the ~.
back edge of the recess 9 to a heel 38. At its front end 39, such - ri.dge 37 is flush with the bottom surface of the front portion 5 of the sole, and increases in:height rearwardly to the heel. The side edges 41 of the ridge 37 are rounded, so that the ridge promotes the flow of snow or ice away from the centre of the sole. The ~. smooth bottom surface of the ridge 37 can also be used for identify-ing markings.
~` ~ The heel 38-has a rearwardly inclined front face 43, with bevelled side edges 44. The heel is provided with a recess 47 over most of i~s bottom area, the remainder of the heel bottom being ;. provided with small pyramidal projections and a low peripheral flange 49. The recess 47 includes ridges 50 defining grooves 51 similar in shape to the grooves in the front recess 9,~but fewer in number.
: The ridges 50 function in exactly the same manner as such front ridges.
Because there is no fiexing of the heel during skiing, the heel 38 or at least that portion of the heel containing the ~-~ ridges 50 is formed of a more resilient material than the remainder ~:~ of the sole. For example, if the sole is formed of material having a Shore hardness of 60 to 65, the heel is formed of material having a Shore hardness of 50 to 55. Thus during skiing, as the bottom of the heel 38 engages the ski, or snow or ice between the ski and sole, the area of the heel containing the ridges 50 flexes to force the snow or ice outwardly towards the sides of the ski in the same manner as the front ridges 10.
:'
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A cross-country ski boot or shoe sole comprising a front portion; a heel; a first central recess in the bottom surface of said front portion; and a plurality of longitudinally extending ridges in said recess for pushing snow or ice outwardly towards the sides of the sole when in use.
2. A sole according to claim 1, including a second central recess in the bottom surface of said heel; and a plurality of longitudinally extending ridges in said recess for pushing snow or ice outwardly towards the sides of the sole when in use, the portion of said heel containing said recess being resilient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA251,119A CA1041294A (en) | 1976-04-27 | 1976-04-27 | Sole for cross-country ski boot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA251,119A CA1041294A (en) | 1976-04-27 | 1976-04-27 | Sole for cross-country ski boot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1041294A true CA1041294A (en) | 1978-10-31 |
Family
ID=4105792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA251,119A Expired CA1041294A (en) | 1976-04-27 | 1976-04-27 | Sole for cross-country ski boot |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1041294A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4920665A (en) * | 1987-04-13 | 1990-05-01 | Pack Roger N | Pivoting ski boot |
-
1976
- 1976-04-27 CA CA251,119A patent/CA1041294A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4920665A (en) * | 1987-04-13 | 1990-05-01 | Pack Roger N | Pivoting ski boot |
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