CA2002060C - Energy efficient hinged ski boot - Google Patents
Energy efficient hinged ski bootInfo
- Publication number
- CA2002060C CA2002060C CA 2002060 CA2002060A CA2002060C CA 2002060 C CA2002060 C CA 2002060C CA 2002060 CA2002060 CA 2002060 CA 2002060 A CA2002060 A CA 2002060A CA 2002060 C CA2002060 C CA 2002060C
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- CA
- Canada
- Prior art keywords
- telescopic tube
- shell
- ski boot
- flex
- rigid
- 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.)
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Abstract
A hinged ski boot comprising a lower shell, continuous with an unsupported soft upper shell, forming one continuous compound shell. The rigid lower shell has a forwardly located reinforced area for engagement of the front ski binding and a control linkage.
The lower rigid shell has a recessed rearwardly located reinforced area for engagement of the rear ski binding and shaft hinges. A skeletal shaft, front cuff and rear cuff form one continuous portion, devoid of fastening means and is hingedly secured to the lower rigid shell.
A tubular control linkage connects the front of the rigid shell to an intermediate portion of the shaft.
This control linkage provides both forward and rearward flex control, provides flex progressiveness, provides a flex biasing, limits maximum ankle movement, provides forward-lean adjustment and comprises a piston air pump, actuated by ankle flex, to draw cold stale air from the front of the shell cavity.
The combination of a rigid lower shell and a non supported soft upper shelf reduces unwanted air invasion into the shell cavity and provides a non critical shaft hinge location.
The structure of the ski boot is both weight efficient and energy efficient.
The lower rigid shell has a recessed rearwardly located reinforced area for engagement of the rear ski binding and shaft hinges. A skeletal shaft, front cuff and rear cuff form one continuous portion, devoid of fastening means and is hingedly secured to the lower rigid shell.
A tubular control linkage connects the front of the rigid shell to an intermediate portion of the shaft.
This control linkage provides both forward and rearward flex control, provides flex progressiveness, provides a flex biasing, limits maximum ankle movement, provides forward-lean adjustment and comprises a piston air pump, actuated by ankle flex, to draw cold stale air from the front of the shell cavity.
The combination of a rigid lower shell and a non supported soft upper shelf reduces unwanted air invasion into the shell cavity and provides a non critical shaft hinge location.
The structure of the ski boot is both weight efficient and energy efficient.
Description
This invention relates generally to ski boots and is more particularly related to improvements which afford the skier to more efficiently transmit muscular effort to skis.
A primary object of this invention is to provide an energy efficient hinged ski boot.
Another object of this invention is to provide a novel ski boot in which various flex and forward-lean related parameters can be changed quickly and conveniently on slope under visual control with reference to clearly marked indicia.
One more object is to reduce heatloss from the feet by providing a novel shell structure and establishing an air flow within ,the shell that move6 air towards the .
forward portion of the shell to control temperature and humidity within the shell.
These and other objects of this invention will become clear from the following description.
It is an object of this invention to provide a ski boot in which the shell comprises a rigid portion that transmits to the ski bindings. via the shortest possible route. the major forces exerted on the rigid portion of the shell. This rigid portion comprises a sole that extends upwards to just below the ankle. where it engages two shaft hinges. This rigid portion also covers the upper frontal area of the shell, where it engages a control linkage through lockable and hingeable mounting means.
It is also an object of this invention to provide a ski boot in which a portion of its shell comprises a non supported soft portion that conforms to the foot and ankle. This portion of the shell, which may bear a resemblance to a basket-ball boot, extends to above the ankle. It affords support to the foot and ankle, prevents the foot from lifting through means as laces, buckles or other fastening means and provides protection from the elements. It conforms to the upper foot and ankle without contributing substantially to forward and rearward flex of the boot. The rigid portion of the shell and the soft portion of the shell are joined together to form one continuous single compound shell. The area of the foot and ankle that according to this invention is being supported exclusively by the soft shell is in conventional hinged boats being supported by a more or less flexible shaft and shell. Secured to the outside of the rigid portion of the shell are hinges. engaging a forwardly and rear-wardly pivotable shaft.
It is an object of this invention to reduce shaft weight by providing a more efficient shaft structure than is found in conventional ski boots.
A forwardly and rearwardly substantially open architecture characterizes the skeletal shaft, while elimination of structure weakening overlap and fastening means provides a further improved strength to weight ratio.
This skeletal shaft comprises two transverse oppositely disposed side flanges, a front cuff and a rear cuff, all forming one continuous portion.
At its lower limits. the skeletal shaft is hingedly secured to the outside of the rigid portion of the shell and extends upwards from the hinges to its upper edge limit.
A primary object of this invention is to provide an energy efficient hinged ski boot.
Another object of this invention is to provide a novel ski boot in which various flex and forward-lean related parameters can be changed quickly and conveniently on slope under visual control with reference to clearly marked indicia.
One more object is to reduce heatloss from the feet by providing a novel shell structure and establishing an air flow within ,the shell that move6 air towards the .
forward portion of the shell to control temperature and humidity within the shell.
These and other objects of this invention will become clear from the following description.
It is an object of this invention to provide a ski boot in which the shell comprises a rigid portion that transmits to the ski bindings. via the shortest possible route. the major forces exerted on the rigid portion of the shell. This rigid portion comprises a sole that extends upwards to just below the ankle. where it engages two shaft hinges. This rigid portion also covers the upper frontal area of the shell, where it engages a control linkage through lockable and hingeable mounting means.
It is also an object of this invention to provide a ski boot in which a portion of its shell comprises a non supported soft portion that conforms to the foot and ankle. This portion of the shell, which may bear a resemblance to a basket-ball boot, extends to above the ankle. It affords support to the foot and ankle, prevents the foot from lifting through means as laces, buckles or other fastening means and provides protection from the elements. It conforms to the upper foot and ankle without contributing substantially to forward and rearward flex of the boot. The rigid portion of the shell and the soft portion of the shell are joined together to form one continuous single compound shell. The area of the foot and ankle that according to this invention is being supported exclusively by the soft shell is in conventional hinged boats being supported by a more or less flexible shaft and shell. Secured to the outside of the rigid portion of the shell are hinges. engaging a forwardly and rear-wardly pivotable shaft.
It is an object of this invention to reduce shaft weight by providing a more efficient shaft structure than is found in conventional ski boots.
A forwardly and rearwardly substantially open architecture characterizes the skeletal shaft, while elimination of structure weakening overlap and fastening means provides a further improved strength to weight ratio.
This skeletal shaft comprises two transverse oppositely disposed side flanges, a front cuff and a rear cuff, all forming one continuous portion.
At its lower limits. the skeletal shaft is hingedly secured to the outside of the rigid portion of the shell and extends upwards from the hinges to its upper edge limit.
The height of the skeletal shaft is defined as the distance between the shaft hinges and the upper edge limit of the skeletal shaft. Relative to the physical size of the skier, the height of the skeletal shaft 5 approximates 3/4 the distance between the skier s ankle joint and knee cap.
The shaft, according to this invention, in its preferred embodiment, has no on slope fastening or adjustment means. To facilitate easy foot entry and 10 foot exit without means for shaft cuff adjustment, the upper edge of the front cuff slants downwardiy from front to rear under an angle of approximately 60 degree with the vertical axis of the shaft.
The upper edge of the rear cuff continues 15 this downward slant in sine with the upper edge of the front cuff. Compared to a non slanted upper cuff edge, the area available for foot entry is increased from approximately circular to approximately elliptical.
The lower edges of the front cuff form a front 20 arch having its apex disposed over the transverse center of the boot. The distance between the upper edge of the front arch and the upper edge of the front cuff, disposed directly above the apex of the front arch, represents the narrowest portion of the front cuff.
25 which amounts to approximately 2~ inches.
The distance between the upper edge of the rear arch and the upper edge of the rear cuff, disposed directly above the apex of the rear arch, represents the narrowest portion of the rear cuff, which amounts to approximately 30 2 inches. The lower sides of the front and rear arches form the cower front and rear limits of the vertical portion of the shaft, which at its cower limit engages the shaft hinges.
The shaft, according to this invention, in its preferred embodiment, has no on slope fastening or adjustment means. To facilitate easy foot entry and 10 foot exit without means for shaft cuff adjustment, the upper edge of the front cuff slants downwardiy from front to rear under an angle of approximately 60 degree with the vertical axis of the shaft.
The upper edge of the rear cuff continues 15 this downward slant in sine with the upper edge of the front cuff. Compared to a non slanted upper cuff edge, the area available for foot entry is increased from approximately circular to approximately elliptical.
The lower edges of the front cuff form a front 20 arch having its apex disposed over the transverse center of the boot. The distance between the upper edge of the front arch and the upper edge of the front cuff, disposed directly above the apex of the front arch, represents the narrowest portion of the front cuff.
25 which amounts to approximately 2~ inches.
The distance between the upper edge of the rear arch and the upper edge of the rear cuff, disposed directly above the apex of the rear arch, represents the narrowest portion of the rear cuff, which amounts to approximately 30 2 inches. The lower sides of the front and rear arches form the cower front and rear limits of the vertical portion of the shaft, which at its cower limit engages the shaft hinges.
The tubular portion formed by front and rear cuffs is slightly conical and converges downwardiy for improved fit. The skeletal shaft as described, facilitates foot entry and exit and provides fit without requiring means 5 for on slope adjustment of either front or rear cuff for foot entry nor requiring repositioning of front or rear cuff after foot entry.
To provide personalized fitting, the shafts can be changed quickly for a more compatible size and can be 10 further customized through use of interchangeable padding on the inside of the cuffs.
To provide proper ankle fit throughout the full flex range, conventional hinged boots require alignment between the pivot point of the boot hinges and the 15 pivot point of the ankle joint.
It ie an object of this invention to provide a hinged ski boot which is more tolerant to hinge misalignment.
The skeletal shaft as described, leaves the soft portion of the shelf substantially exposed and unsupported.
20 The support of foot and ankle is provided exclusively by the support afforded by the soft portion of the shell.
This soft portion conforms to foot and ankle, independent of hinge position or alignment. Fit ie entirely determined by the soft portion of the shell and is not affected by 25 hinge misalignment. In the upper area of the shaft, where the cuffs engage the skier's leg. the effects of hinge misalignment are negligible, resulting from the increased distance to the hinges.
Another object of this invention is to provide a 30 forwardiy disposed tubular control linkage that affords implementation of various flex related parameters.
To provide personalized fitting, the shafts can be changed quickly for a more compatible size and can be 10 further customized through use of interchangeable padding on the inside of the cuffs.
To provide proper ankle fit throughout the full flex range, conventional hinged boots require alignment between the pivot point of the boot hinges and the 15 pivot point of the ankle joint.
It ie an object of this invention to provide a hinged ski boot which is more tolerant to hinge misalignment.
The skeletal shaft as described, leaves the soft portion of the shelf substantially exposed and unsupported.
20 The support of foot and ankle is provided exclusively by the support afforded by the soft portion of the shell.
This soft portion conforms to foot and ankle, independent of hinge position or alignment. Fit ie entirely determined by the soft portion of the shell and is not affected by 25 hinge misalignment. In the upper area of the shaft, where the cuffs engage the skier's leg. the effects of hinge misalignment are negligible, resulting from the increased distance to the hinges.
Another object of this invention is to provide a 30 forwardiy disposed tubular control linkage that affords implementation of various flex related parameters.
This control linkage comprises a flex control portion and a forward-lean portion.
The flex control portion in its basic embodiment comprises two telescopic tubes. the inner and the outer telescopic tube. The outer telescopic..tube is lockabiy attached towards its proximate end to a third telescopic tube comprising two outwardly rearwardly curving arms, forming the forward-lean portion. These arms are hingedly and positionai seleatably engaged with an intermediate portion of the side flanges of the shaft.
The inner telescopic tube is hingedly and lockably secured towards its distal end to the front of the rigid shell.
The inner telescopic tube comprises two identical longitudinal slots. One slot is disposed in one wall, medially between the upper and lower margins of this tube.
The other slot is disposed diametrically opposite. The outer telescopic tube has two slots mating the same position as the slots of the inner telescopic tube. Inside the inner telescopic tube is a compressively resilient element providing flex control by exerting pressure on two pins.
One of these pins traverses the distal ends of the slots of both telescopic tubes, while the other pin traverses the proximate ends of the slots of both telescopic tubes.
When no force is applied between the distal and proximate end of the flex control portion, the distal limits of the slots of the inner telescopic tube and the distal limits of the slots of the outer telescopic tube are juxtaposed.
Similarly, the proximate limits of the slots of the inner telescopic tube and the proximate limits of the slots of the outer telescopic tube are juxtaposed. The linkage will remain in the position through the pressure of the compressiveiy resilient element exerted onto the pins and on the engaged limits of the slots.
The flex control portion in its basic embodiment comprises two telescopic tubes. the inner and the outer telescopic tube. The outer telescopic..tube is lockabiy attached towards its proximate end to a third telescopic tube comprising two outwardly rearwardly curving arms, forming the forward-lean portion. These arms are hingedly and positionai seleatably engaged with an intermediate portion of the side flanges of the shaft.
The inner telescopic tube is hingedly and lockably secured towards its distal end to the front of the rigid shell.
The inner telescopic tube comprises two identical longitudinal slots. One slot is disposed in one wall, medially between the upper and lower margins of this tube.
The other slot is disposed diametrically opposite. The outer telescopic tube has two slots mating the same position as the slots of the inner telescopic tube. Inside the inner telescopic tube is a compressively resilient element providing flex control by exerting pressure on two pins.
One of these pins traverses the distal ends of the slots of both telescopic tubes, while the other pin traverses the proximate ends of the slots of both telescopic tubes.
When no force is applied between the distal and proximate end of the flex control portion, the distal limits of the slots of the inner telescopic tube and the distal limits of the slots of the outer telescopic tube are juxtaposed.
Similarly, the proximate limits of the slots of the inner telescopic tube and the proximate limits of the slots of the outer telescopic tube are juxtaposed. The linkage will remain in the position through the pressure of the compressiveiy resilient element exerted onto the pins and on the engaged limits of the slots.
2 0 02o so The position of the flex control portion as described will be referred to as the relaxed position. In this position, the resiliently compressive element is minimally compressed.
It is an object of this invention to preset the minimum forward and rearward force required to yield any forward or rearward movement, to provide quick longitudinal weight shift, normally associated with stiff boots.
Forward or rearward ankle flex will only result in weight shift along the longitudinal axis of the ski to the extend that it develops forward or rearward counter force. This being the reason most advanced skiers prefer a relatively stiff boot. In conventional ski boots and conventional hinged ski boots, a small amount of ankle flex will result in a correspondingly small amount of forward or rearward counterforce. In the boot according to this invention, the degree of precompression of the compressively resilient element, with the flex control linkage in the relaxed position, determines which minimum counter force must exist prior to any forward or rearward ankle movement. when the compressive or extending force between the inner and outer telescopic tubes does not exceed the pressure of the compressively resilient element on the pins, the tubes will not move relative to each other.
Only when the compressive or extending force between the inner and outer telescopic tubes exceeds the pressure of the compressively resilient element, will the tubes readjust their position relative to each other over a distance determined by the characteristics of the compressively resilient element.
It is an object of this invention to preset the minimum forward and rearward force required to yield any forward or rearward movement, to provide quick longitudinal weight shift, normally associated with stiff boots.
Forward or rearward ankle flex will only result in weight shift along the longitudinal axis of the ski to the extend that it develops forward or rearward counter force. This being the reason most advanced skiers prefer a relatively stiff boot. In conventional ski boots and conventional hinged ski boots, a small amount of ankle flex will result in a correspondingly small amount of forward or rearward counterforce. In the boot according to this invention, the degree of precompression of the compressively resilient element, with the flex control linkage in the relaxed position, determines which minimum counter force must exist prior to any forward or rearward ankle movement. when the compressive or extending force between the inner and outer telescopic tubes does not exceed the pressure of the compressively resilient element on the pins, the tubes will not move relative to each other.
Only when the compressive or extending force between the inner and outer telescopic tubes exceeds the pressure of the compressively resilient element, will the tubes readjust their position relative to each other over a distance determined by the characteristics of the compressively resilient element.
Another object of this invention is the conservation of the forward and rearward angular momentum of forward and rearward ankle flex.
Unless forward angular momentum, after it has been converted from a forward to a rearward movement by a forwardly responsive flex control means, can be received, stored and returned by a rearwardly responsive flex control means, initial angular momentum will be dissipated.
Conventional hinged ski boots do not have means to efficiently control rearward flex. This invention provides a forwardly disposed flex control linkage. This linkage is of sufficient physical dimension to provide ample capacity to efficiently receive. store and return the energy of both forward and rearward anguiar momentum as expressed by the forward and rearward flexing at the ankle.
At maximum forward ankle flex, the compressively resiiient element is maximally compressed. At maximum rearward ankle flex, the compressively resilient element is again maximally compressed, storing the energy initiated by forward or rearward ankle flex and providing both identical forward and rearward ankle flex response.
Other objects of this invention are to clearly limit the absolute maximum forward and rearward ankle movement regardless of the force of the forward or rearward ankle flex and to provide controlled.progressiveness of ankle flex.
Both are determined by the characteristics and structure of the compressively resiiient element.
Further objects of this invention are to provide for adjustment to control the degree of forward-lean, provide ranges of free movement and provide for complete disengagement of the flex control portion.
The forward-lean portion of the control linkage engages hingediy with the shaft, it also engages the outer telescopic tube and can be locked to the outer telescopic tube in various different positions. providing for various different angles of forward-lean.
For these different positions. reference can be made to clearly visible forwardly disposed marked indicia.
The forward-lean portion can also be locked in positions where it facilitates a limited amount of free movement as is desirable for some modes of skiing. Furthermore, both flex and forward-lean can be adjusted by changing the engagement position of the forward-lean portion.
Another aspect of this invention is to provide quickly interchangeable flex control portions.
By pulling the flex control portion out of the distal mounting means and disengaging the forward-lean portion by pulling up the forward-lean adjustment lever. the flex control portion can be removed and replaced quickly under visual control, without requiring removal of the ski boot.
In most conventional ski boots and particularly the rear entry type ski boots, the shaft does not conform too well to the contour of the leg throughout the entire flex range . When pressed forwards, a void of one inch behind the leg is not uncommon. When pressed rearwards.
a similar void develops in front of the leg. Each time a forward or rearward movement is made, a wedge shaped column of air, extending from the top of the shaft down to the ankle is replaced by fresh air. This condition, commonly known as gapping. not only adversely affects the skier's control over the ski. it also contributes significantly to temperature related discomforts such as cold feet and numb feet.
It is an object of this invention to improve temperature control by having the soft portion of the shell provide proper fit and air seal along the lower leg and ankle, independent of ankle flex.
Another object of this invention is to improve air management within the shell by providing a piston air pump to control air circulation within the shell.
This air pump is located near the distal end of the flex control portion and is actuated by movements between two telescopic tubes. This air pump comprises a piston that passes air on compression and seals on suction.
This piston engages slidabiy with the inner wail of the inner telescopic tube. The front of the inner telescopic is closed to form a lowpressure chamber. Near the distal end of this inner telescopic tube is a short tube that passes through the front of the rigid shell and is solidly secured to the rigid shell. This short tube also passes through an aperture proximate to the distal end in the lower wall of the inner telescopic tube, at an angle with the longitudinal axis of the telescopic tubes of approximately 90 degree. This short tube. together with a resilient pad and a retaining clip. form the distal mounting means, hingedly and lockably securing the distal end of the flex control portion to the rigid shell. forming a sealed air passage between the rigid shell cavity and the inner telescopic tube. This short tube contains an air valve allowing air to flow from the front of the shell cavity to the lowpressure chamber of the inner telescopic tube and not vice versa. The reduced air pressure in the front of the shell causes air to be drawn in around the upper extremities of the soft shell.
_g_ 2oo2oso The airflow is relatively slow and quickly assumes the temperature of its surroundings. This air flows to the front of the boot where it replaces cooler air.
Furthermore. the humidity inside the shell is reduced to improve foot comfort.
Another object of this invention is to enhance air temperature control within the shell by providing flexible tubing that permits air from a preferred area of the skiers'suit to enter the shell cavity.
It is an object of this invention to reduce the weight of the shell by providing a more efficient shell structure.
The main forces acting on the rigid portion of the shell are applied to the flex control mounting means and the shaft hinges from where they are transmitted through the rigid shell to the ski. bindings. By having the engagement area of the front binding disposed closely to the flex control mounting means and by having the engagement area of the rear binding disposed closely to the engagement area of the shaft hinges. the stress to the rigid shell is reduced to a minimum. allowing a more efficient and lighter shell structure. A forwardly disposed reinforced area continuous with the distal flex control mounting means provides for front binding to boot engagement. A shortened sole provides a rearwardiy disposed reinforced recessed areas immediately posterior to the shaft hinges and inferior to the insole. for rear binding to boot engagement.
It will be understood that although boots are generally used in pairs. only one boot will be shown and described in detail.
- IO -These together with other and more specific objects and advantages will become apparent from the following description hen taken in conjunction with the accompanying drawings forming a part thereof, wherein:
Figure 1 shows a side view of the boot, and Figure 2 shows a front view of the boot without the control linkage, and Figure 3 shows a cross-sectional view of the distal mounting means. and Figure 4 shows another cross-sectional view of the distal mounting means, and Figure 5 shows a side view of the complete control linkage with the flex control portion in the relaxed position and the forward-lean portion in the locked position, and Figure 6 shows a top view of figure 5, and Figure 7 shows a top view of a portion of the outer telescopic tube, showing locking holes and slidable free movement slots, and Figure 8. and figure 9 show a top view of the forward-lean portion in various partially engaged positions, and Figure 10 shows a side view of the flex control portion in the relaxed position, and Figure 11 shows a cross-sectional view of figure 10, and Figure 12 shows a side view of the flex control portion in the extended position, and Figure 13 shows a cross-sectional view of figure 12, and Figure 14 shows a side view of the flex control portion in the compressed position, and Figure 15 shows a cross-sectional view of figure 14, and Figure 16 and figure 17 show sectional views of the compressively resilient element, and Figure 16 shows a sectional view of a discrete portion of the resilient element.
Referring to the drawings with the aid of reference numerals. the main parts of the boot are shown in figures 1 and 2, in which 25 designates the shell, 50 the skeletal shaft. 70 the control linkage, 75 the flex control portion and 125 the forward-lean portion.
The shell comprises a rigid lower portion 26, made out of plastic, reinforced plastic or any other suitable material. This rigid shell portion 26 comprises a rear-wardly disposed reinforced area 27 for engagement of the rear ski binding and a forwardiy disposed reinforced area for engagement of the front aki binding. 28. Figure 3 shows a cross-section of the flex control mounting means in which a short rigid tube 29 is anchored in the rigid shell portion 26 and is surrounded by a soft rubber pad 30 assuring an airtight seal. This short tube contains a one way air valve 32. Figure 4 shows a different cross-section of the flex control mounting means and shows notches 33 for locking tube 29 onto the distal end of the flex control linkage. Shell 25 also comprises a soft upper shell portion 39. made out of leather, plastic or any other suitable material. The rigid shell portion 26 comprises two hinges 35 and 36, which hingedly secure the outside of shell portion 26 to skeletal shaft 50.
The skeletal shaft comprises two side flanges, 51 and 52, a front cuff 53 and a rear cuff 54. The upper edge limits of the front cuff are indicated by 55 and the upper edge limits of the front arch, formed by the front of sections 51 and 52 and the lower edge limits of the front cuff is indicated by 56. The upper edge limits of the rear cuff are indicated by 57. The upper edge limits of the rear arch formed by the rear of sections 51, 52 and the lower edge limits of the rear cuff are indicated by 58.
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The shaft also comprises an air hose 59, which communicates with the upper rear shell cavity. The side flanges 51 and 52 have a number of adjustment holes, 60, 61, 62, 63, 64 and 65 to hingediy receive the arms of the forward-lean portion 125.
Shaft 50 in its preferred embodiment is made out of high strength aluminum but could also be made out of plastic, reinforced plastic or any other suitable material.
The control linkage 70 comprises two main portions, a flex control portion 75, and a forward-lean portion 125.
The flex control portion 75 comprises an inner telescopic tube 76. This tube is hingedly secured to the rigid shell via a short tube 29, passing through aperture 77. As shown in figure 4, this inner telescopic tube is removably locked onto tube 29 by two clips, 78 and 79, which engage notches 33. These clips are assisted in exerting pressure by resilient pad 80. Tube 76 is closed at its distal end.
The view in figures 5 and 6 shows the control linkage comprising the flex control portion and the forward-lean portion, in the relaxed position. The inner telescopic tube is partially surrounded by an outer telescopic tube 81.
Hoth tubes have two slots disposed diametrically opposite and parallel to the longitudinal axis of the tubes. The outer telescopic tube is partly surrounded by and locked onto a third telescopic tube forming the forward-lean portion 125. The forward-lean portion is hingedly secured to the shaft via two rearwardly outwardly curving arms 127 and 128. Near the end of these arms are intermediate hinging means 129, 130. These intermediate hinging means form part of the hinges that secure this portion via screws 131, 132 to anyone of the three sets of adjustment holes 60-61, 62-63, or 64-65. Each set of adjustment holes provides a different flex and forward-lean.
Zoo2oso The forward-lean portion of the control linkage is positionally selectably and lockabiy secured to the outer telescopic tube. A flexible lever 133 is at one end pivotably secured to the tubular portion 126 of the forward-lean portion with rivet 134. This lever extends past the distal limit of the tubular portion 126 and curves upwards at its nonsecured end to form a handle 135, facilitating lifting by hand. This lever has a pin 136 protruding downwardly, attached at the lower part of its downwards curve, proximate to the handle. This lever can be lifted and rotated to insert pin 136 into either mode selecting hole 137, 138 or 139, providing different angles of forward-lean. Figure 7 shows a sectional top view of the outer telescopic tube and shows two slldabie free movement slots of unequal length 82, 83 and four locking holes 84, 85, 86 and 87 in the outer telescopic tube. When pin 136 is inserted into mode selecting hole 138, the third telescopic tube can be locked through pin 136 onto any one of the locking holes 84, 85, 86 or 87, providing various 20' amounts of forward-lean. Though only four holes are shown, it is obvious that any number of locking holes at any regular or irregular spacing can be provided to afford any desirable range of forward-lean adjustment. When pin 136 is inserted into either mode selecting hole 137 or 139, the forward=-lean portion can be slidably cocked through pin 136 onto anyone of the siidabie free movement slots 82 or 83 providing various amounts of free movement. The third telescopic tube has two slots 140 and 141 disposed diametrically opposite and medially 91n both side walls, extending the available range of forward-lean adjustment.
Figures 6, 8 and 9 show how the lever can be rotated to a position of selectable forward-lean.
Figure 6 shows a selected forward-lean position. Figure 8 shows a selected amount of free movement and figure 9 shows a selected different amount of free movement.
Figure 5 shows a side view of the control linkage in which the flex control portion is in the relaxed position and locked onto the forward-lean portion.
Figure 6 shows a top view of figure 5 and shows the positionai relationship between the various portions.
Figure 10 shows a side view of the flex control portion in the relaxed position. Figure 11 shows a cross-section of figure 10 with the flex control portion in the relaxed position and the compressively resilient element 90 in its minimally compressed position, which is its precompressed position. figure 11 also shows two pins, 100 and 101 that pass through longitudinal slots 104 and 105 of the outer telescopic tube. The limits of the slots are designated as 106, 107 for the proximate limits of the slots of the inner telescopic tube and as 108, 109 for the distal limits of the slots of the inner telescopic tube. and as 110, 111 for the proximate limits of the slots of the outer telescopic tube and as 112, 113 for the distal limits of the slots of the outer telescopic tube. The compressively resilient element 90 presses pin 100 against the slot limits 106, 107, 110, 111 and also presses pin 101 against the slot limits 108, 109, 112, 113, maintaining the tubes in the relaxed position relative to each other as long as the compressive or extending forces do not exceed the preset pressure of the compressively resilient element. Figure 12 shows a side view of the flex control portion in the extended position. while figure 13 shows a cross-section of figure 12. In this position, the compressively resilient element is maximally compressed.
This maximally extended position is reached when pin 100 engages the proximate slot limits 106, 107 of the inner telescopic tube and when pin 101 engages the distal limits 112, 113 of the slots of the outer telescopic tube.
In this position. further extending force will not result in any further movement. Within a range. the amount of movement caused by a certain amount of force depends on the characteristics of the compreasively resilient element.
Figure 14 shows a side view of the flex control portion in the maximally compressed position. while figure 15 shows a cross-section of figure 14. In this position, the compressively resilient element is again maximally compressed. This maximally compressed position is reached when pin 100 engages the limits 110, 111 of the slots of the outer telescopic tube and when pin 101 engages the slot limits 108, 109 of the inner telescopic tube. In this position, further compressive force will not result in any further movement. Within a range, the amount of movement caused by a certain force will depend on the characteristics of the compresaively resilient element.
It is an object of this invention to provide a wide range of various flex parameters.
The compressively resilient element in its preferred embodiment as shown in figures 11, 13, 15 and shown in more detail in figures 16, 17 and 18 comprises a number of metal or otherwise rigid disks 91, separated by a compressively resilient rubberlike material, 92.
Figures 16 and 17 show some typical patterns in which this rubberiike material can be deposited between the disks. The pattern, the amount and the resilience of the material deposited between the disks determines at which pressure two adjacent disks will reach maximum compression and limits the maximum forward or rearward ankle flex.
The metal disks prevent buckling of the resilient element without reducing the choice of deposit patterns.
The compressively resilient element as shown in figures 11, 13 and 15 may form one precompressed muiticeli element or may comprise a number of selected single cell elements stacked together to provide any degree of flex progressiveness to afford the desired personalized flex patterns. One such single element is shown in figure 18.
It is obvious that many alternative embodiments can be contrived such as through the use of different materials, compression springs, rubberlike tension elements or tension springs without departing from the spirit of this invention Figures 1. 13 and I5 show a piston pump in which a piston 120 is driven by pin 101 via connecting rod 121.
When this piston is moved forwards, the air volume in front of the piston is reduced, resulting in an increase in air pressure. This increase in air pressure causes air to escape around the circumference of the piston.
when this piston is moved rearwards, a decrease in air pressure results, causing the piston to seal around its circumference and air to be drawn through the one way valve, disposed in the distal flex control mounting means.
Figures 11, 13 and 15 show how the position of the piston is related to the various positions of the inner and outer telescopic tubes. It will be noted that the piston is moved only when the flex control portion is moved from the relaxed position towards the extended position and that the stroke of the piston depends on the amount of rearward ankle flex.
It is obvious that many alternative embodiments can be envisioned such as different piston arrangements different valve configurations and various means of piston actuation 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.
The boot as described relates firstly to attached boots commonly used for Alpine skiing. However, some aspects of this invention may read on Nordic skiing, the more recently emerged snow-boards and various non attached athletic boots.
a i I
_ 18 _ .
Unless forward angular momentum, after it has been converted from a forward to a rearward movement by a forwardly responsive flex control means, can be received, stored and returned by a rearwardly responsive flex control means, initial angular momentum will be dissipated.
Conventional hinged ski boots do not have means to efficiently control rearward flex. This invention provides a forwardly disposed flex control linkage. This linkage is of sufficient physical dimension to provide ample capacity to efficiently receive. store and return the energy of both forward and rearward anguiar momentum as expressed by the forward and rearward flexing at the ankle.
At maximum forward ankle flex, the compressively resiiient element is maximally compressed. At maximum rearward ankle flex, the compressively resilient element is again maximally compressed, storing the energy initiated by forward or rearward ankle flex and providing both identical forward and rearward ankle flex response.
Other objects of this invention are to clearly limit the absolute maximum forward and rearward ankle movement regardless of the force of the forward or rearward ankle flex and to provide controlled.progressiveness of ankle flex.
Both are determined by the characteristics and structure of the compressively resiiient element.
Further objects of this invention are to provide for adjustment to control the degree of forward-lean, provide ranges of free movement and provide for complete disengagement of the flex control portion.
The forward-lean portion of the control linkage engages hingediy with the shaft, it also engages the outer telescopic tube and can be locked to the outer telescopic tube in various different positions. providing for various different angles of forward-lean.
For these different positions. reference can be made to clearly visible forwardly disposed marked indicia.
The forward-lean portion can also be locked in positions where it facilitates a limited amount of free movement as is desirable for some modes of skiing. Furthermore, both flex and forward-lean can be adjusted by changing the engagement position of the forward-lean portion.
Another aspect of this invention is to provide quickly interchangeable flex control portions.
By pulling the flex control portion out of the distal mounting means and disengaging the forward-lean portion by pulling up the forward-lean adjustment lever. the flex control portion can be removed and replaced quickly under visual control, without requiring removal of the ski boot.
In most conventional ski boots and particularly the rear entry type ski boots, the shaft does not conform too well to the contour of the leg throughout the entire flex range . When pressed forwards, a void of one inch behind the leg is not uncommon. When pressed rearwards.
a similar void develops in front of the leg. Each time a forward or rearward movement is made, a wedge shaped column of air, extending from the top of the shaft down to the ankle is replaced by fresh air. This condition, commonly known as gapping. not only adversely affects the skier's control over the ski. it also contributes significantly to temperature related discomforts such as cold feet and numb feet.
It is an object of this invention to improve temperature control by having the soft portion of the shell provide proper fit and air seal along the lower leg and ankle, independent of ankle flex.
Another object of this invention is to improve air management within the shell by providing a piston air pump to control air circulation within the shell.
This air pump is located near the distal end of the flex control portion and is actuated by movements between two telescopic tubes. This air pump comprises a piston that passes air on compression and seals on suction.
This piston engages slidabiy with the inner wail of the inner telescopic tube. The front of the inner telescopic is closed to form a lowpressure chamber. Near the distal end of this inner telescopic tube is a short tube that passes through the front of the rigid shell and is solidly secured to the rigid shell. This short tube also passes through an aperture proximate to the distal end in the lower wall of the inner telescopic tube, at an angle with the longitudinal axis of the telescopic tubes of approximately 90 degree. This short tube. together with a resilient pad and a retaining clip. form the distal mounting means, hingedly and lockably securing the distal end of the flex control portion to the rigid shell. forming a sealed air passage between the rigid shell cavity and the inner telescopic tube. This short tube contains an air valve allowing air to flow from the front of the shell cavity to the lowpressure chamber of the inner telescopic tube and not vice versa. The reduced air pressure in the front of the shell causes air to be drawn in around the upper extremities of the soft shell.
_g_ 2oo2oso The airflow is relatively slow and quickly assumes the temperature of its surroundings. This air flows to the front of the boot where it replaces cooler air.
Furthermore. the humidity inside the shell is reduced to improve foot comfort.
Another object of this invention is to enhance air temperature control within the shell by providing flexible tubing that permits air from a preferred area of the skiers'suit to enter the shell cavity.
It is an object of this invention to reduce the weight of the shell by providing a more efficient shell structure.
The main forces acting on the rigid portion of the shell are applied to the flex control mounting means and the shaft hinges from where they are transmitted through the rigid shell to the ski. bindings. By having the engagement area of the front binding disposed closely to the flex control mounting means and by having the engagement area of the rear binding disposed closely to the engagement area of the shaft hinges. the stress to the rigid shell is reduced to a minimum. allowing a more efficient and lighter shell structure. A forwardly disposed reinforced area continuous with the distal flex control mounting means provides for front binding to boot engagement. A shortened sole provides a rearwardiy disposed reinforced recessed areas immediately posterior to the shaft hinges and inferior to the insole. for rear binding to boot engagement.
It will be understood that although boots are generally used in pairs. only one boot will be shown and described in detail.
- IO -These together with other and more specific objects and advantages will become apparent from the following description hen taken in conjunction with the accompanying drawings forming a part thereof, wherein:
Figure 1 shows a side view of the boot, and Figure 2 shows a front view of the boot without the control linkage, and Figure 3 shows a cross-sectional view of the distal mounting means. and Figure 4 shows another cross-sectional view of the distal mounting means, and Figure 5 shows a side view of the complete control linkage with the flex control portion in the relaxed position and the forward-lean portion in the locked position, and Figure 6 shows a top view of figure 5, and Figure 7 shows a top view of a portion of the outer telescopic tube, showing locking holes and slidable free movement slots, and Figure 8. and figure 9 show a top view of the forward-lean portion in various partially engaged positions, and Figure 10 shows a side view of the flex control portion in the relaxed position, and Figure 11 shows a cross-sectional view of figure 10, and Figure 12 shows a side view of the flex control portion in the extended position, and Figure 13 shows a cross-sectional view of figure 12, and Figure 14 shows a side view of the flex control portion in the compressed position, and Figure 15 shows a cross-sectional view of figure 14, and Figure 16 and figure 17 show sectional views of the compressively resilient element, and Figure 16 shows a sectional view of a discrete portion of the resilient element.
Referring to the drawings with the aid of reference numerals. the main parts of the boot are shown in figures 1 and 2, in which 25 designates the shell, 50 the skeletal shaft. 70 the control linkage, 75 the flex control portion and 125 the forward-lean portion.
The shell comprises a rigid lower portion 26, made out of plastic, reinforced plastic or any other suitable material. This rigid shell portion 26 comprises a rear-wardly disposed reinforced area 27 for engagement of the rear ski binding and a forwardiy disposed reinforced area for engagement of the front aki binding. 28. Figure 3 shows a cross-section of the flex control mounting means in which a short rigid tube 29 is anchored in the rigid shell portion 26 and is surrounded by a soft rubber pad 30 assuring an airtight seal. This short tube contains a one way air valve 32. Figure 4 shows a different cross-section of the flex control mounting means and shows notches 33 for locking tube 29 onto the distal end of the flex control linkage. Shell 25 also comprises a soft upper shell portion 39. made out of leather, plastic or any other suitable material. The rigid shell portion 26 comprises two hinges 35 and 36, which hingedly secure the outside of shell portion 26 to skeletal shaft 50.
The skeletal shaft comprises two side flanges, 51 and 52, a front cuff 53 and a rear cuff 54. The upper edge limits of the front cuff are indicated by 55 and the upper edge limits of the front arch, formed by the front of sections 51 and 52 and the lower edge limits of the front cuff is indicated by 56. The upper edge limits of the rear cuff are indicated by 57. The upper edge limits of the rear arch formed by the rear of sections 51, 52 and the lower edge limits of the rear cuff are indicated by 58.
,..~..
The shaft also comprises an air hose 59, which communicates with the upper rear shell cavity. The side flanges 51 and 52 have a number of adjustment holes, 60, 61, 62, 63, 64 and 65 to hingediy receive the arms of the forward-lean portion 125.
Shaft 50 in its preferred embodiment is made out of high strength aluminum but could also be made out of plastic, reinforced plastic or any other suitable material.
The control linkage 70 comprises two main portions, a flex control portion 75, and a forward-lean portion 125.
The flex control portion 75 comprises an inner telescopic tube 76. This tube is hingedly secured to the rigid shell via a short tube 29, passing through aperture 77. As shown in figure 4, this inner telescopic tube is removably locked onto tube 29 by two clips, 78 and 79, which engage notches 33. These clips are assisted in exerting pressure by resilient pad 80. Tube 76 is closed at its distal end.
The view in figures 5 and 6 shows the control linkage comprising the flex control portion and the forward-lean portion, in the relaxed position. The inner telescopic tube is partially surrounded by an outer telescopic tube 81.
Hoth tubes have two slots disposed diametrically opposite and parallel to the longitudinal axis of the tubes. The outer telescopic tube is partly surrounded by and locked onto a third telescopic tube forming the forward-lean portion 125. The forward-lean portion is hingedly secured to the shaft via two rearwardly outwardly curving arms 127 and 128. Near the end of these arms are intermediate hinging means 129, 130. These intermediate hinging means form part of the hinges that secure this portion via screws 131, 132 to anyone of the three sets of adjustment holes 60-61, 62-63, or 64-65. Each set of adjustment holes provides a different flex and forward-lean.
Zoo2oso The forward-lean portion of the control linkage is positionally selectably and lockabiy secured to the outer telescopic tube. A flexible lever 133 is at one end pivotably secured to the tubular portion 126 of the forward-lean portion with rivet 134. This lever extends past the distal limit of the tubular portion 126 and curves upwards at its nonsecured end to form a handle 135, facilitating lifting by hand. This lever has a pin 136 protruding downwardly, attached at the lower part of its downwards curve, proximate to the handle. This lever can be lifted and rotated to insert pin 136 into either mode selecting hole 137, 138 or 139, providing different angles of forward-lean. Figure 7 shows a sectional top view of the outer telescopic tube and shows two slldabie free movement slots of unequal length 82, 83 and four locking holes 84, 85, 86 and 87 in the outer telescopic tube. When pin 136 is inserted into mode selecting hole 138, the third telescopic tube can be locked through pin 136 onto any one of the locking holes 84, 85, 86 or 87, providing various 20' amounts of forward-lean. Though only four holes are shown, it is obvious that any number of locking holes at any regular or irregular spacing can be provided to afford any desirable range of forward-lean adjustment. When pin 136 is inserted into either mode selecting hole 137 or 139, the forward=-lean portion can be slidably cocked through pin 136 onto anyone of the siidabie free movement slots 82 or 83 providing various amounts of free movement. The third telescopic tube has two slots 140 and 141 disposed diametrically opposite and medially 91n both side walls, extending the available range of forward-lean adjustment.
Figures 6, 8 and 9 show how the lever can be rotated to a position of selectable forward-lean.
Figure 6 shows a selected forward-lean position. Figure 8 shows a selected amount of free movement and figure 9 shows a selected different amount of free movement.
Figure 5 shows a side view of the control linkage in which the flex control portion is in the relaxed position and locked onto the forward-lean portion.
Figure 6 shows a top view of figure 5 and shows the positionai relationship between the various portions.
Figure 10 shows a side view of the flex control portion in the relaxed position. Figure 11 shows a cross-section of figure 10 with the flex control portion in the relaxed position and the compressively resilient element 90 in its minimally compressed position, which is its precompressed position. figure 11 also shows two pins, 100 and 101 that pass through longitudinal slots 104 and 105 of the outer telescopic tube. The limits of the slots are designated as 106, 107 for the proximate limits of the slots of the inner telescopic tube and as 108, 109 for the distal limits of the slots of the inner telescopic tube. and as 110, 111 for the proximate limits of the slots of the outer telescopic tube and as 112, 113 for the distal limits of the slots of the outer telescopic tube. The compressively resilient element 90 presses pin 100 against the slot limits 106, 107, 110, 111 and also presses pin 101 against the slot limits 108, 109, 112, 113, maintaining the tubes in the relaxed position relative to each other as long as the compressive or extending forces do not exceed the preset pressure of the compressively resilient element. Figure 12 shows a side view of the flex control portion in the extended position. while figure 13 shows a cross-section of figure 12. In this position, the compressively resilient element is maximally compressed.
This maximally extended position is reached when pin 100 engages the proximate slot limits 106, 107 of the inner telescopic tube and when pin 101 engages the distal limits 112, 113 of the slots of the outer telescopic tube.
In this position. further extending force will not result in any further movement. Within a range. the amount of movement caused by a certain amount of force depends on the characteristics of the compreasively resilient element.
Figure 14 shows a side view of the flex control portion in the maximally compressed position. while figure 15 shows a cross-section of figure 14. In this position, the compressively resilient element is again maximally compressed. This maximally compressed position is reached when pin 100 engages the limits 110, 111 of the slots of the outer telescopic tube and when pin 101 engages the slot limits 108, 109 of the inner telescopic tube. In this position, further compressive force will not result in any further movement. Within a range, the amount of movement caused by a certain force will depend on the characteristics of the compresaively resilient element.
It is an object of this invention to provide a wide range of various flex parameters.
The compressively resilient element in its preferred embodiment as shown in figures 11, 13, 15 and shown in more detail in figures 16, 17 and 18 comprises a number of metal or otherwise rigid disks 91, separated by a compressively resilient rubberlike material, 92.
Figures 16 and 17 show some typical patterns in which this rubberiike material can be deposited between the disks. The pattern, the amount and the resilience of the material deposited between the disks determines at which pressure two adjacent disks will reach maximum compression and limits the maximum forward or rearward ankle flex.
The metal disks prevent buckling of the resilient element without reducing the choice of deposit patterns.
The compressively resilient element as shown in figures 11, 13 and 15 may form one precompressed muiticeli element or may comprise a number of selected single cell elements stacked together to provide any degree of flex progressiveness to afford the desired personalized flex patterns. One such single element is shown in figure 18.
It is obvious that many alternative embodiments can be contrived such as through the use of different materials, compression springs, rubberlike tension elements or tension springs without departing from the spirit of this invention Figures 1. 13 and I5 show a piston pump in which a piston 120 is driven by pin 101 via connecting rod 121.
When this piston is moved forwards, the air volume in front of the piston is reduced, resulting in an increase in air pressure. This increase in air pressure causes air to escape around the circumference of the piston.
when this piston is moved rearwards, a decrease in air pressure results, causing the piston to seal around its circumference and air to be drawn through the one way valve, disposed in the distal flex control mounting means.
Figures 11, 13 and 15 show how the position of the piston is related to the various positions of the inner and outer telescopic tubes. It will be noted that the piston is moved only when the flex control portion is moved from the relaxed position towards the extended position and that the stroke of the piston depends on the amount of rearward ankle flex.
It is obvious that many alternative embodiments can be envisioned such as different piston arrangements different valve configurations and various means of piston actuation 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.
The boot as described relates firstly to attached boots commonly used for Alpine skiing. However, some aspects of this invention may read on Nordic skiing, the more recently emerged snow-boards and various non attached athletic boots.
a i I
_ 18 _ .
Claims (17)
1. A ski boot comprising: a shell; mounting means; a flex control portion; adjustment means; a forward-lean portion;
lower hinging means; intermediate hinging means; and a skeletal shaft; characterized in that said skeletal shaft comprises: two transversely spaced distinct rigid side flanges; and at least one rigid cuff portion; said lower hinging means hingedly securing lower portions of the side flanges to the shell, and said at least one cuff portion securing the upper portions of the side flanges in a fixed transversely spaced position, and wherein the forward-lean portion comprises: two transversely spaced rearwardly outwardly curving arms; said arms being hingedly secured to an intermediate portion of the side flanges via the intermediate hinging means, and wherein the flex control portion is rearwardly, detachably secured to the forward-lean portion via the adjustment means and is forwardly detachably secured to a forward portion of the shell via the mounting means.
lower hinging means; intermediate hinging means; and a skeletal shaft; characterized in that said skeletal shaft comprises: two transversely spaced distinct rigid side flanges; and at least one rigid cuff portion; said lower hinging means hingedly securing lower portions of the side flanges to the shell, and said at least one cuff portion securing the upper portions of the side flanges in a fixed transversely spaced position, and wherein the forward-lean portion comprises: two transversely spaced rearwardly outwardly curving arms; said arms being hingedly secured to an intermediate portion of the side flanges via the intermediate hinging means, and wherein the flex control portion is rearwardly, detachably secured to the forward-lean portion via the adjustment means and is forwardly detachably secured to a forward portion of the shell via the mounting means.
2. A ski boot as defined in claim 1, wherein said two transversely spaced distinct rigid side flanges comprise an average width; an average length, approximate to the height of the skeletal shaft; wherein said at least one rigid cuff portion comprises an average width; and wherein the ratio of side flange width to side flange length approximates a factor of 8, and further, wherein the ratio of rigid cuff portion width to side flange length approximates a factor of 5, facilitating foot entry and exit with a minimum shaft and cuff adjustment.
3. A ski boot as defined in claim 1, wherein the forward-lean portion comprises: adjustment means.
characterized by; a lever; a locking pin; and mode selecting holes; said locking pin being attached to said lever to be selectively insertable into one of said mode selecting holes and wherein the flex control portion comprises: an outer telescopic tube; and wherein said outer telescopic tube comprises: at least one locking hole; said at least one locking hole capable of being penetrated by said lever attached locking pin for longitudinal adjustably and detachably securing said outer telescopic tube onto said forward-lean portion.
characterized by; a lever; a locking pin; and mode selecting holes; said locking pin being attached to said lever to be selectively insertable into one of said mode selecting holes and wherein the flex control portion comprises: an outer telescopic tube; and wherein said outer telescopic tube comprises: at least one locking hole; said at least one locking hole capable of being penetrated by said lever attached locking pin for longitudinal adjustably and detachably securing said outer telescopic tube onto said forward-lean portion.
4. A ski boot as defined in claim 3, wherein said outer telescopic tube comprises: at least one slidable free movement slot; said at least one slidable free movement slot capable of being penetrated by said lever attached locking pin for longitudinally slidably detachably securing said outer telescopic tube onto said forward-lean portion.
5. A ski boot as defined in claim 1, wherein the flex control portion comprises: an inner telescopic tube; and wherein the mounting means comprises: a plug; and outer surface notches; said plug being attached to a forward portion of the shell and wherein the mounting means further comprises: an aperture; and retaining clips; disposed within a forward portion of said inner telescopic tube and wherein said plug, said notches and said clips cooperate to detachably secure said inner telescopic tube onto the forward shell portion.
6. A ski boot as defined in claim 1, wherein the flex control portion comprises: an inner telescopic tube; an outer telescopic tube; and wherein said inner telescopic tube and said outer telescopic tube comprise: longitudinal slots; and pins; wherein said longitudinal slots are diametrically opposed in the inner and outer telescopic tube walls and wherein said pins transversely extend through said longitudinal slots, bi-directionally limiting longitudinal movement between the tubes.
7. A ski boot as defined in claim 6, wherein the inner telescopic tube comprises: a resilient element; and wherein said resilient element is longitudinal slidable enclosed within the inner telescopic tube, and wherein the resilient element exerts pressure onto the pins, urging the pins apart, providing resilient resistance to forward and rearward shaft movement.
8. A ski boot as defined in claim 7, wherein the resilient element comprises: a compressively resilient material; and rigid disks; and wherein said compressively resilient material is deposited onto the surface of the disks and wherein said disks are perpendicular to the inner walls of the inner telescopic tube and are longitudinal slidably guided by the inner walls of the inner telescopic tube, preventing buckling of said resilient element.
9. A ski boot as defined in claim 7, wherein the resilient element comprises: discrete portions of compressively resilient material; and rigid disks; and wherein said discrete portions of compressively resilient material are deposited in distinctly spaced separate units onto the surface of said disks and wherein the disks are perpendicular to the inner walls of the inner telescopic tube and are slidably guided by the inner walls of the inner telescopic tube, preventing buckling of the resilient element, and providing a wide range of flex characteristics.
10. A ski boot as defined in claim 6, wherein the flex control portion comprises: a piston air pump; and wherein the piston air pump is actuated by the movement between the inner and outer telescopic tubes.
11. A ski boot as defined in claim 5, wherein the plug comprises: a tubular portion; and a one way air valve; said one way air valve being disposed within the tubular portion, allowing air to flow from or be drawn out of a forward portion of the shell through said tubular portion.
12. A ski boot as defined in claims 1 or 2, wherein the distinct rigid side flanges comprise a composite material.
13. A ski boot as defined in claims 1 or 2, wherein the distinct rigid side flanges comprise a metal.
14. A ski boot as defined in claims 1 or 2, wherein the distinct rigid side flanges comprise aluminum.
15. A ski boot as defined in claims 1 or 2, wherein the rearwardly outwardly curving arms comprise a composite material.
16. A ski boot as defined in claims 1 or 2, wherein the rearwardly outwardly curving arms comprise a metal.
17. A ski boot as defined in claims 1 or 2, wherein the rearwardly outwardly curving arms comprise aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2002060 CA2002060C (en) | 1989-11-02 | 1989-11-02 | Energy efficient hinged ski boot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2002060 CA2002060C (en) | 1989-11-02 | 1989-11-02 | Energy efficient hinged ski boot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2002060A1 CA2002060A1 (en) | 1991-05-02 |
| CA2002060C true CA2002060C (en) | 1999-12-14 |
Family
ID=4143446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2002060 Expired - Lifetime CA2002060C (en) | 1989-11-02 | 1989-11-02 | Energy efficient hinged ski boot |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2002060C (en) |
-
1989
- 1989-11-02 CA CA 2002060 patent/CA2002060C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2002060A1 (en) | 1991-05-02 |
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| EEER | Examination request | ||
| MKEX | Expiry |