CA2028698C - Ski boot - Google Patents
Ski bootInfo
- Publication number
- CA2028698C CA2028698C CA 2028698 CA2028698A CA2028698C CA 2028698 C CA2028698 C CA 2028698C CA 2028698 CA2028698 CA 2028698 CA 2028698 A CA2028698 A CA 2028698A CA 2028698 C CA2028698 C CA 2028698C
- Authority
- CA
- Canada
- Prior art keywords
- guide element
- frame
- footwear
- hinging means
- article
- 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
Links
- 238000007688 edging Methods 0.000 claims description 5
- 210000002683 foot Anatomy 0.000 abstract description 26
- 210000003423 ankle Anatomy 0.000 abstract description 14
- 210000003205 muscle Anatomy 0.000 abstract description 7
- 230000003387 muscular Effects 0.000 abstract description 7
- 210000003484 anatomy Anatomy 0.000 abstract description 2
- 230000006978 adaptation Effects 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 239000003351 stiffener Substances 0.000 abstract 1
- 230000027455 binding Effects 0.000 description 2
- 238000009739 binding Methods 0.000 description 2
- 244000309466 calf Species 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 210000001699 lower leg Anatomy 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Human anatomy provides angular ankle movement, known as dorsi flexion and plantar flexion, far in excess of that required for modern Alpine Skiing. The musculature of the lower leg is well adapted for controlling a foot sized lever. However, when the foot is extended to ski size dimensions, muscular strength is inadequate to afford the skier proper control over his position in relation to the ski, a position commonly referred to as forward-lean.
Conventional ski boots assist the skier maintaining the correct forward-lean position by using resilient stiffeners in combination with articulated areas or hinges, to effectively reduce the importance of the lower leg muscles as part of the total skier to ski equation and replace active muscle action by static positioning means.
The ski boot according to this invention uses the principles of leverage, reducing available angular ankle movement into a lesser and more controllable angular forward-lean movement, providing muscular adaptation, optimizing forward-lean control.
Conventional ski boots assist the skier maintaining the correct forward-lean position by using resilient stiffeners in combination with articulated areas or hinges, to effectively reduce the importance of the lower leg muscles as part of the total skier to ski equation and replace active muscle action by static positioning means.
The ski boot according to this invention uses the principles of leverage, reducing available angular ankle movement into a lesser and more controllable angular forward-lean movement, providing muscular adaptation, optimizing forward-lean control.
Description
2,028,698 in response to Examiner's report DISCLOSURE
Ski boots form an indispensable link between the feet, lower leg and skis. In the art of skiing, the angle between the lower leg and the transverse axis of the ski is normally maintained in a fixed position) providing for ski edging.
The angle between the lower leg and the longitudinal ski axis varies continually, depending on the actions of the skier. This movement is known as ankle flex. From a human anatomical point of view, skis are an unnatural extension of the feet. During skiing and more particularly during vigorous skiing, the leg muscles are subjected to forces which are frequently outside the range of muscular capability. Ski boots are designed to provide sufficient support to the ankle to maintain the proper ankle flex without placing too great a stress on the leg muscles. While the forces exerted on the leg muscles are high, the amount of ankle movement required for skiing is relatively small.
An angular movement of twenty five degrees will suffice for normal skiing. Average human anatomy provides ankle flex in the range of forty five degrees or more. It is an object of this invention to provide a multiple hinged ski boot wherein the angle of ankle flex as expressed by the angle between the foot and leg is reduced to a lesser angle as expressed by the angle between the leg and ski, providing reduced muscle stress and better muscular control.
2,028,698 in response to Examiner's report The ski boot according to this invention comprises three separate main portions, connected together at three hinged or articulated areas, coacting with a telescopic guide element, creating a system wherein ankle flex provides a reduced leg to ski angular movement and wherein the force of ankle flex is less than the force of the leg to ski angular movement.
It will be understood that although boots are generally used in pairs, only one boot will be shown and described in detail. These together with other and more specific objects and advantages will become apparent from the following description when taken in conjunction with the accompanying drawings forming a part thereof, wherein:
Figure 1 is a diagrammatic side elevational view of a multiple hinged ski boot illustrating the operating principles of the ski boot according to this invention showing the foot in the dorsi flexed position.
Figure 2 is another side elevational view showing the foot in the plantar flexed position.
Figure 3 is a side elevational view of the ski boot showing the foot in the intermediate flexed position.
Figure 4 is a forward elevational view of the boot, showing the foot in the intermediate flexed position.
Figure 5 is a sectional view of the telescopic guide element taken along the plane of line 5-5 of figure 3.
Figure 6 is a top plan view shown along the plane of line 2,028,698 in response to Examiner's report 6-6 of figure 3, showing an air valve to adjust air flow.
Figure 7 is a side elevational view of the rigid and soft boot portions.
Referring to the drawings in detail:
Figure 1 is a diagrammatic side elevational view of a multiple hinged ski boot showing the structural portions of the boot relative to the ski, wherein portion 10 is a ski, having a tip or spatula 11 and a tail 12) whereupon is releasably attached a frame 20. Frame portion 20 is forward releasably attached to the ski at 21 and is rearward releasably attached to the ski at 22. A risid font nnrtinn 30 is forwardly vertical hingedly attached to frame portion at 31.
Rearwardly, foot portion 30 is hingedly attached to shaft 15 portion 40 at 41 via the rearward hinging means.
Intermediately, shaft portion 40 is hingedly attached via the intermediate hinging means at 46 to a telescopic guide element, comprising an upper portion 50) an intermediate portion 60 and lower portion 70. Portion 70 is rigidly 20 attached to the forward portion of the frame, intermediate 21 and 31. The geometry as described confines the path of travel of intermediate hinging means 46 to an extension of the longitudinal axis of the telescopic guide element) forcing the intermediate hinging means to move along a rearwardly and upwardly trajectory. Figure 1 diagrammatically shows the foot in the dorsi flexed x,028,698 in response to Examiner's report 1998/ 11 / l b position while figure 2 diagrammatically shows identical portions with the foot in the plantar flexed position. Angle a' represents the angle between foot and lower leg or ankle flex while angle b', known as the forward-lean angle) represents the angle between the lower leg and the longitudinal ski axis. Angle b' is the only angle considered of importance in modern Alpine skiing. Angle c' represents the angle between the longitudinal axis of the telescopic guide element and the longitudinal axis of the frame.
As is clear from figures 1 and 2, the location of the hinging means, angle c', the telescopic guiding action of the guide element and the geometry between the various separate portions, angular ankle movement a' is transformed into a reduced leg to ski angular movement b', forward-lean) which, governed by accepted rules of leverage, is accompanied by proportionally reduced stress on the muscles of the lower leg. The a' to b' angle reduction ratio as exemplified in figures 1 and 2 approximates a factor of two.
A two fold reduction in ankle flex a' provides more than adequate angular movement b') resulting in an effective doubling of muscular leg force related to ski control.
It is an object of this invention to provide a multiple hinged ski boot, coacting with a telescopic guide element, wherein the lower leg force of the skier is increased by the a' to b' ratio of ankle flex reduction, affording the skier 2,028,698 in response to Examiner's report improved muscular control over forward-lean angle b'. The multiple hinged ski boot as described, unlike a conventional hinged ski boot, depends entirely on muscular effort to control and maintain the desired forward-lean angle b'. The unoccupied boot as described offers only minimal resistance to forward or rearward angular movement of the shaft. It is advantageous to assist the musculature of the leg by resiliently urging the boot into the desired mean forward-lean position. It is an object of this invention to provide a multiple hinged ski boot coacting with a telescopic guide element, wherein the forward-lean angle is resiliently urged towards a preset mean angle. Figure 3 is a side elevational view of the boot, showing the foot in the intermediate flexed position and wherein 20 comprises a rigid frame. The lower frame portion can be of conventional boot sole shape and dimension and is secured to the ski at 21 and 22 by means of release bindings. In the ski boot according to this invention, the size of the sole is not directly related to the size of the foot and can be custom shortened to individual requirements. Portion 23 is a sole protector to be fitted to a shortened sole.
It is an object of this invention to provide a ski boot having a sole sizable to various required dimensions.
Forwardly and continuous with the side walls and release binding engaging forward limits of frame sole 20 is a rearwardly open and forwardly closed box shaped frame 2,028,698 in response to Examiner's report portion 24 which vertical hingedly engages the forward sides of rigid foot portion 30 through forward hinging means 31-32 which transmit all torsional forces between frame sole 20 and foot portion 30. Portion 24 is also rigidly continuous with tubular portion 27 which secures lower telescopic tube 70 to the frame portion and transfers all forces exerted on this tube to the frame portion. Rearwardly, foot portion 30 is upwardly open between 33 and 34-35 providing rearward foot entry. Foot portion 30 can be shaped in various different manners, be both functional and eye pleasing while allowing for internal padding to improve fit and thermal insulation. Portion 30 coacts with a soft boot portion 36, which allows rear boot entry and provides rearward closure.
The soft boot portion is not shown in figure 3, focussing attention to the structural characteristics of the ski boot.
Foot portion 30 hingedly receives shaft 40 at rearward hinging means 41,42, transmitting all torsional forces between foot portion 30 and shaft portion 40. Shaft 40 is rigid, one piece and extends upwards to the maximum diameter of the calf of the leg. The shaft comprises a short internally padded tubular upper area 43, which at its side margins narrows downwardly to form side flanges 44 and 45.
The flanges comprise intermediate hinging means 46-47 to hingedly receive the proximate end of upper telescopic tube 50, which hingedly engages both side flanges of the shaft simultaneously, guides the 2,028,698 in response to Examiner's report intermediate hinging means along the longitudinal guide element axis.and transmits forces between the shaft and the forward portion of frame sole 20 via telescopic tubes 60 and 70 and box shaped frame portion 24.
The guide element as shown in figure 3, comprises three telescopic slidably engaged portions. An upper portion 50) an intermediate portion 60 and a lower portion 70. Portion 70 is secured to portion 27 by screw 28, allowing for easy attachment and detachment of the telescopic guide element.
It is an object of this invention to provide for quickly interchangeable guide elements of various relaxed length and urging force towards relaxed length. Screw 28 allows portion 27 to engage portion 70 at various selected points along the longitudinal axis of portion 70. Portion 70 may comprise a rigid adapter portion, allowing portion 70 to be secured to portion 27 providing an oblique angle between the longitudinal axis of the guide element and the longitudinal axis of portion 27. Portion 70 may be engaged to portion 27 through a resilient adapter portion, resiliently securing portion 70 to portion 27. The proximate end of 50 comprises two oppositely disposed) upwardly outwardly curving arms 51 and 52 which pivotally engage shaft side flanges 44-45, through intermediate hinging means 46 and 47.
Figure 4 is a forward elevational view of the boot, showing the foot in the intermediate flexed position and particularly showing the telescopic guide element, the 2,028,698 in response to Examiner's report attachment to frame portion 27 and the outwardly curving arms 51 and 52 and their hinged attachment to shaft side flanges 44 and 45.
Figure 5 is a view of the telescopic guide element taken along the plane of line 5-5 of figure 3, showing the three telescopic tubes in the partly compressed position. Also shown is coil spring 80 which at 71 is attached to the lower portion of lower telescopic tube 70 and which at 53 is attached to the upper portion of upper telescopic tube 50) urging the unoccupied boot towards the intermediate flexed position.
The upper portion of tube 50 is closed off by baffle 54, which comprises a one way air valve 55, transforming the telescopic tubes into a piston air pump, actuated by movement between the tubes) The lower portion of tube 70 communicates with the forward area of the foot portion via a one way air valve, causing air to be drawn out of the forward foot portion, improving foot comfort. Figure 6 is a top plan view of baffle 54, closing the upper end of the upper telescopic tube 50 and shows an adjustable air valve 55, which allows adjustment of air flow by partially closing aperture 56. Air valve 55 is free to pivot around rivet 57, allowing adjustment of the airflow and controlling resistance to telescopic movement. Additional hydraulic or pneumatic damping means may be provided.
_g_ 2,028,698 in response to Examiner's report Various embodiments are known from the automotive industry and do not require further description.
The coil spring may advantageously be replaced by more weight efficient rubber like resilient materials. The telescopic tubes in the ski boot according to this invention comprise friction reducing self lubricating plastic surfaces. The friction may also be reduced by using ball bearings or other means known in the art. In an alternative embodiment, the telescopic tubes may be replaced by a scissor type guiding element. Figure 7 is a side elevational view of the rigid and soft boot portions wherein 36 is the soft boot portion. It is obvious that many alternative embodiments can be envisioned without departing from the spirit of this invention. Therefore) the scope of this invention is not limited to the exact embodiments as shown) but only as indicated by the appended claims.
_g_
Ski boots form an indispensable link between the feet, lower leg and skis. In the art of skiing, the angle between the lower leg and the transverse axis of the ski is normally maintained in a fixed position) providing for ski edging.
The angle between the lower leg and the longitudinal ski axis varies continually, depending on the actions of the skier. This movement is known as ankle flex. From a human anatomical point of view, skis are an unnatural extension of the feet. During skiing and more particularly during vigorous skiing, the leg muscles are subjected to forces which are frequently outside the range of muscular capability. Ski boots are designed to provide sufficient support to the ankle to maintain the proper ankle flex without placing too great a stress on the leg muscles. While the forces exerted on the leg muscles are high, the amount of ankle movement required for skiing is relatively small.
An angular movement of twenty five degrees will suffice for normal skiing. Average human anatomy provides ankle flex in the range of forty five degrees or more. It is an object of this invention to provide a multiple hinged ski boot wherein the angle of ankle flex as expressed by the angle between the foot and leg is reduced to a lesser angle as expressed by the angle between the leg and ski, providing reduced muscle stress and better muscular control.
2,028,698 in response to Examiner's report The ski boot according to this invention comprises three separate main portions, connected together at three hinged or articulated areas, coacting with a telescopic guide element, creating a system wherein ankle flex provides a reduced leg to ski angular movement and wherein the force of ankle flex is less than the force of the leg to ski angular movement.
It will be understood that although boots are generally used in pairs, only one boot will be shown and described in detail. These together with other and more specific objects and advantages will become apparent from the following description when taken in conjunction with the accompanying drawings forming a part thereof, wherein:
Figure 1 is a diagrammatic side elevational view of a multiple hinged ski boot illustrating the operating principles of the ski boot according to this invention showing the foot in the dorsi flexed position.
Figure 2 is another side elevational view showing the foot in the plantar flexed position.
Figure 3 is a side elevational view of the ski boot showing the foot in the intermediate flexed position.
Figure 4 is a forward elevational view of the boot, showing the foot in the intermediate flexed position.
Figure 5 is a sectional view of the telescopic guide element taken along the plane of line 5-5 of figure 3.
Figure 6 is a top plan view shown along the plane of line 2,028,698 in response to Examiner's report 6-6 of figure 3, showing an air valve to adjust air flow.
Figure 7 is a side elevational view of the rigid and soft boot portions.
Referring to the drawings in detail:
Figure 1 is a diagrammatic side elevational view of a multiple hinged ski boot showing the structural portions of the boot relative to the ski, wherein portion 10 is a ski, having a tip or spatula 11 and a tail 12) whereupon is releasably attached a frame 20. Frame portion 20 is forward releasably attached to the ski at 21 and is rearward releasably attached to the ski at 22. A risid font nnrtinn 30 is forwardly vertical hingedly attached to frame portion at 31.
Rearwardly, foot portion 30 is hingedly attached to shaft 15 portion 40 at 41 via the rearward hinging means.
Intermediately, shaft portion 40 is hingedly attached via the intermediate hinging means at 46 to a telescopic guide element, comprising an upper portion 50) an intermediate portion 60 and lower portion 70. Portion 70 is rigidly 20 attached to the forward portion of the frame, intermediate 21 and 31. The geometry as described confines the path of travel of intermediate hinging means 46 to an extension of the longitudinal axis of the telescopic guide element) forcing the intermediate hinging means to move along a rearwardly and upwardly trajectory. Figure 1 diagrammatically shows the foot in the dorsi flexed x,028,698 in response to Examiner's report 1998/ 11 / l b position while figure 2 diagrammatically shows identical portions with the foot in the plantar flexed position. Angle a' represents the angle between foot and lower leg or ankle flex while angle b', known as the forward-lean angle) represents the angle between the lower leg and the longitudinal ski axis. Angle b' is the only angle considered of importance in modern Alpine skiing. Angle c' represents the angle between the longitudinal axis of the telescopic guide element and the longitudinal axis of the frame.
As is clear from figures 1 and 2, the location of the hinging means, angle c', the telescopic guiding action of the guide element and the geometry between the various separate portions, angular ankle movement a' is transformed into a reduced leg to ski angular movement b', forward-lean) which, governed by accepted rules of leverage, is accompanied by proportionally reduced stress on the muscles of the lower leg. The a' to b' angle reduction ratio as exemplified in figures 1 and 2 approximates a factor of two.
A two fold reduction in ankle flex a' provides more than adequate angular movement b') resulting in an effective doubling of muscular leg force related to ski control.
It is an object of this invention to provide a multiple hinged ski boot, coacting with a telescopic guide element, wherein the lower leg force of the skier is increased by the a' to b' ratio of ankle flex reduction, affording the skier 2,028,698 in response to Examiner's report improved muscular control over forward-lean angle b'. The multiple hinged ski boot as described, unlike a conventional hinged ski boot, depends entirely on muscular effort to control and maintain the desired forward-lean angle b'. The unoccupied boot as described offers only minimal resistance to forward or rearward angular movement of the shaft. It is advantageous to assist the musculature of the leg by resiliently urging the boot into the desired mean forward-lean position. It is an object of this invention to provide a multiple hinged ski boot coacting with a telescopic guide element, wherein the forward-lean angle is resiliently urged towards a preset mean angle. Figure 3 is a side elevational view of the boot, showing the foot in the intermediate flexed position and wherein 20 comprises a rigid frame. The lower frame portion can be of conventional boot sole shape and dimension and is secured to the ski at 21 and 22 by means of release bindings. In the ski boot according to this invention, the size of the sole is not directly related to the size of the foot and can be custom shortened to individual requirements. Portion 23 is a sole protector to be fitted to a shortened sole.
It is an object of this invention to provide a ski boot having a sole sizable to various required dimensions.
Forwardly and continuous with the side walls and release binding engaging forward limits of frame sole 20 is a rearwardly open and forwardly closed box shaped frame 2,028,698 in response to Examiner's report portion 24 which vertical hingedly engages the forward sides of rigid foot portion 30 through forward hinging means 31-32 which transmit all torsional forces between frame sole 20 and foot portion 30. Portion 24 is also rigidly continuous with tubular portion 27 which secures lower telescopic tube 70 to the frame portion and transfers all forces exerted on this tube to the frame portion. Rearwardly, foot portion 30 is upwardly open between 33 and 34-35 providing rearward foot entry. Foot portion 30 can be shaped in various different manners, be both functional and eye pleasing while allowing for internal padding to improve fit and thermal insulation. Portion 30 coacts with a soft boot portion 36, which allows rear boot entry and provides rearward closure.
The soft boot portion is not shown in figure 3, focussing attention to the structural characteristics of the ski boot.
Foot portion 30 hingedly receives shaft 40 at rearward hinging means 41,42, transmitting all torsional forces between foot portion 30 and shaft portion 40. Shaft 40 is rigid, one piece and extends upwards to the maximum diameter of the calf of the leg. The shaft comprises a short internally padded tubular upper area 43, which at its side margins narrows downwardly to form side flanges 44 and 45.
The flanges comprise intermediate hinging means 46-47 to hingedly receive the proximate end of upper telescopic tube 50, which hingedly engages both side flanges of the shaft simultaneously, guides the 2,028,698 in response to Examiner's report intermediate hinging means along the longitudinal guide element axis.and transmits forces between the shaft and the forward portion of frame sole 20 via telescopic tubes 60 and 70 and box shaped frame portion 24.
The guide element as shown in figure 3, comprises three telescopic slidably engaged portions. An upper portion 50) an intermediate portion 60 and a lower portion 70. Portion 70 is secured to portion 27 by screw 28, allowing for easy attachment and detachment of the telescopic guide element.
It is an object of this invention to provide for quickly interchangeable guide elements of various relaxed length and urging force towards relaxed length. Screw 28 allows portion 27 to engage portion 70 at various selected points along the longitudinal axis of portion 70. Portion 70 may comprise a rigid adapter portion, allowing portion 70 to be secured to portion 27 providing an oblique angle between the longitudinal axis of the guide element and the longitudinal axis of portion 27. Portion 70 may be engaged to portion 27 through a resilient adapter portion, resiliently securing portion 70 to portion 27. The proximate end of 50 comprises two oppositely disposed) upwardly outwardly curving arms 51 and 52 which pivotally engage shaft side flanges 44-45, through intermediate hinging means 46 and 47.
Figure 4 is a forward elevational view of the boot, showing the foot in the intermediate flexed position and particularly showing the telescopic guide element, the 2,028,698 in response to Examiner's report attachment to frame portion 27 and the outwardly curving arms 51 and 52 and their hinged attachment to shaft side flanges 44 and 45.
Figure 5 is a view of the telescopic guide element taken along the plane of line 5-5 of figure 3, showing the three telescopic tubes in the partly compressed position. Also shown is coil spring 80 which at 71 is attached to the lower portion of lower telescopic tube 70 and which at 53 is attached to the upper portion of upper telescopic tube 50) urging the unoccupied boot towards the intermediate flexed position.
The upper portion of tube 50 is closed off by baffle 54, which comprises a one way air valve 55, transforming the telescopic tubes into a piston air pump, actuated by movement between the tubes) The lower portion of tube 70 communicates with the forward area of the foot portion via a one way air valve, causing air to be drawn out of the forward foot portion, improving foot comfort. Figure 6 is a top plan view of baffle 54, closing the upper end of the upper telescopic tube 50 and shows an adjustable air valve 55, which allows adjustment of air flow by partially closing aperture 56. Air valve 55 is free to pivot around rivet 57, allowing adjustment of the airflow and controlling resistance to telescopic movement. Additional hydraulic or pneumatic damping means may be provided.
_g_ 2,028,698 in response to Examiner's report Various embodiments are known from the automotive industry and do not require further description.
The coil spring may advantageously be replaced by more weight efficient rubber like resilient materials. The telescopic tubes in the ski boot according to this invention comprise friction reducing self lubricating plastic surfaces. The friction may also be reduced by using ball bearings or other means known in the art. In an alternative embodiment, the telescopic tubes may be replaced by a scissor type guiding element. Figure 7 is a side elevational view of the rigid and soft boot portions wherein 36 is the soft boot portion. It is obvious that many alternative embodiments can be envisioned without departing from the spirit of this invention. Therefore) the scope of this invention is not limited to the exact embodiments as shown) but only as indicated by the appended claims.
_g_
Claims (14)
1. A triple hinged, framed article of footwear, more particularly a ski boot, for attachment to an article of sports equipment, more particularly a ski, providing angularly coordinated movement between three separate and mutually movable boot portions, comprising:
a frame, for attachment to an article of sports equipment, having a central longitudinal frame axis, a transverse frame axis, a forward frame portion, a rearward frame portion; and a foot portion, having a forward foot portion and a rearward foot portion: and forward hinging means, wherein the forward foot portion is hingedly secured to the forward frame portion via said forward hinging means, further comprising:
a guide element, having a guide element central longitudinal axis, a guide element lower portion and a guide element upper portion, wherein the guide element upper portion is longitudinally movable secured to the guide element lower portion and wherein the guide element lower portion is secured to the forward frame portion, still further comprising: a shaft, having a lower shaft portion and an intermediate shaft portion; rearward hinging means:
and intermediate hinging means, wherein the lower shaft portion is hingedly secured to the rearward foot portion via said rearward hinging means, and wherein the intermediate shaft portion is hingedly secured to the guide element upper portion via said intermediate hinging means, guiding the intermediate shaft portion in a trajectory parallel to the guide element central longitudinal axis.
a frame, for attachment to an article of sports equipment, having a central longitudinal frame axis, a transverse frame axis, a forward frame portion, a rearward frame portion; and a foot portion, having a forward foot portion and a rearward foot portion: and forward hinging means, wherein the forward foot portion is hingedly secured to the forward frame portion via said forward hinging means, further comprising:
a guide element, having a guide element central longitudinal axis, a guide element lower portion and a guide element upper portion, wherein the guide element upper portion is longitudinally movable secured to the guide element lower portion and wherein the guide element lower portion is secured to the forward frame portion, still further comprising: a shaft, having a lower shaft portion and an intermediate shaft portion; rearward hinging means:
and intermediate hinging means, wherein the lower shaft portion is hingedly secured to the rearward foot portion via said rearward hinging means, and wherein the intermediate shaft portion is hingedly secured to the guide element upper portion via said intermediate hinging means, guiding the intermediate shaft portion in a trajectory parallel to the guide element central longitudinal axis.
2. A triple hinged, framed article of footwear, as defined in claim 1, wherein the guide element comprises longitudinally slidable elements.
3. A triple hinged, framed article of footwear, as defined in claim 2, wherein said longitudinally slidable elements comprise telescopic tubes, urging the intermediate shaft portion in an undeviatable trajectory parallel to the guide element central longitudinal axis.
4. A triple hinged, framed article of footwear, as defined in claim 3, wherein the guide element comprises a spring element.
5. A triple hinged, framed article of footwear, as defined in claim 1, wherein the guide element comprises a scissor type guiding mechanism.
6. A triple hinged, framed article of footwear, as defined in claim 1, wherein the guide element central longitudinal axis is diverging upwardly-rearwardly from the central longitudinal frame axis and wherein the guide element central longitudinal axis is centered over the central longitudinal frame axis.
7. A triple hinged, framed article of footwear, as defined in claim 1, wherein the shaft comprises two transversely oppositely disposed rigid side flanges and wherein the guide element upper portion comprises two outwardly curving arms, hingedly engaging an intermediate portion of said shaft side flanges via the intermediate hinging means, urging the intermediate shaft portion in an undeviatable trajectory parallel to the guide element central longitudinal axis.
8. A triple hinged, framed article of footwear, as defined in claim 1 or claim 7, wherein the rearward hinging means is torsionally rigid, transferring edging torque from the shaft side flanges to the foot portion.
9. A triple hinged, framed article of footwear, as defined in claim 1, wherein the foot portion is rigid, transferring edging torque from the rearward hinging means to the forward hinging means.
10. A triple hinged, framed article of footwear, as defined in claim 1, wherein the forward hinging means is torsionally rigid, transferring edging torque from the foot portion to the frame
11.A triple hinged, framed article of footwear, as defined in claim 1, wherein the rotational axis of the foward hinging means is substantially perpendicular to the central longitudinal frame axis and parallel to the transverse frame axis.
12.A triple hinged, framed article of footwear, as defined in claim 1, wherein the frame is rigid, transferring edging torque from the forward hinging means to the forward frame portion and to the rearward frame portion.
13.A triple hinged, framed article of footwear, as defined in claim 1, wherein the frame comprises frame portions for attachment to an article of sports equipment.
14. A triple hinged, framed article of footwear) as defined in claim 13, wherein said frame portions are integral with the forward frame portion and integral with the rearward frame portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2028698 CA2028698C (en) | 1990-10-29 | 1990-10-29 | Ski boot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2028698 CA2028698C (en) | 1990-10-29 | 1990-10-29 | Ski boot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2028698A1 CA2028698A1 (en) | 1992-04-30 |
| CA2028698C true CA2028698C (en) | 1999-10-05 |
Family
ID=4146275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2028698 Expired - Lifetime CA2028698C (en) | 1990-10-29 | 1990-10-29 | Ski boot |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2028698C (en) |
-
1990
- 1990-10-29 CA CA 2028698 patent/CA2028698C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2028698A1 (en) | 1992-04-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |