CA1050579A - Ski boot heel lock - Google Patents
Ski boot heel lockInfo
- Publication number
- CA1050579A CA1050579A CA238,577A CA238577A CA1050579A CA 1050579 A CA1050579 A CA 1050579A CA 238577 A CA238577 A CA 238577A CA 1050579 A CA1050579 A CA 1050579A
- Authority
- CA
- Canada
- Prior art keywords
- lever
- lock
- ski
- heel
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
ABSTRACT
In a ski lock having a base secured to a ski, a lever means secured to the base and having two extensions such that when one extension is pressed a bearing surface holds a ski boot heel against the ski and when the other extension is pressed the bearing surface releases the heel from the ski.
In a ski lock having a base secured to a ski, a lever means secured to the base and having two extensions such that when one extension is pressed a bearing surface holds a ski boot heel against the ski and when the other extension is pressed the bearing surface releases the heel from the ski.
Description
S'7~
This inyention relates to a ski boot heel lock and specifically a heel lock which can he used with cross-country or touring skis.
Cross country skiing re~uires a binding to attach a ski boot to ; that ski which permits the heel of the boot to lift fr~ the ski during use.
Bindings which hold only the toe o~ the boot to the ski are satisfactory for most of cross-country skiing, however there are downhill parts of ski trails upon which would be much easier to travel if the ski boot heel were attached to the ski. This would permit greater control of the skis, and would also encourage safer skiing particularly for those people who partake of both downhill and cross-country skiing, as there is a strong tendency for a down-hill skier to follow the downhill practice of leaning forward when cross-country skiing. Such a practice is disastrous with known cross-country bindings as the skier will topple forwards. The older type of bindings, such as a cable harness, held the toe of the boot onto the ski, and they could be arranged to hold down the heel of the boot onto the ski, however ~ such an arrangement would require stopping on the trail and coupling the ; heel end of the cable onto hooks attached to the ski. Such coupling would have to be done by hand and would also create a hazard on a ski trail by having to stop on the trail.
There is therefore a requirement to have a cross-country binding which can be quickly operated while skiing to clamp and unclamp the heel of a boot onto a ski.
This invention relates to a ski boot heel lock which can be used in conjunction wi~h cross-country bindings, the lock being operable during ., :
skiing to secure or free the heel of the boot. It is arranged so that it can be operated by the tips of the ski poles.
Generally, the invention in one of its embodiments consists of a hase plate secur~ble to a ski, a first lever pivotally secured to the rear end of the base plate, a second leYer pivotally secured to the front end of the first leYer, and a bell crank leYer secured by one of its ends to the front end of the base plate and by the midpoint to the front end of the second ., .
~1--~35~
leyer. The o~her end of the bell crank lever has a bearing surface which can clamp the heel of the ski boot to a ski through a corresponding bearing surface on the heel. By having extensions, at the rear end of the Eirst lever and the rear end of the second leYer, and a tension spring between the rear end of the first leYer and the front end of the second leYer, the clamping of the Eront end of the bell cr~nk lever to the heel can be achieved.
~ arious types oE structure can be used to achieve the same pur-pose as that achieved by the referred to embodiment, and there can also be provided a safety release mechanism if required.
The invention will now be described with reference to the accom-panying drawings in which:
Eigure 1 is a side elevational view of an embodiment of the apparatus of this invention showing part of a ski and ~ki boot, Figure 2 is a perspective view of the apparatus of Figure 1, Figure 3 is a side elevational view of a modified clamping means to that shown in Figure 1, -Figure ~ is a plain view of part of the modified clamping means of Figure 3, Figure 5 is a side elevational view of another type of clamping means which can be used with the embodiment of Figure 3, Figure 6 is a front eleYational view showing a heel element and the clamping means of Figure 5, Figure ~ is a further embodiment of the apparatus of th;.s inven-tion, Figure 8 i8 a partial side elevational view of a ski boot heel .
showing a modified connector for use with the embodiment of Figure 7, Figure 9 i8 a front sectional ~levational yiew sho~ing a safety release mechanism, and Figure lO is a side elevational view, partly in section, of another embodimen~ of the apparatus o this inYention.
~ ëferring specifically to Figures 1 and 2 the heel lock is depicted secured to a ski, part of which is shown. ~he heel lock consists ,. ~ , ',, ' ~ . , ' ,: ' .. ~ ., ' ' ~5~57~
of a base 1 haying holes fo~ acco~odatin~ screws 3. ~ first leyex 5 ~s piYotally secured to the rear end o~ the base 1, by a shaft 7. ~n extension 9 extends rearwardly past the shaft 7, this extension having a dimple 11 which can locate a ski pole tip.
A second lever 13 is piYotally secured at lts rear end to the front end of the first lever S, by a shaft 15. An extension 17 extends rear-` wardly of the axle 15 and has a dimple 19 for accommodating the tip of a ski pole.
A third bell crank lever 21 is pivotally secured by one end of the front end of the base 1 through an axle 23, and through its midpoint to .
the front end of the second lever 13 through axle 25.
The first, second and ~hird levers all have a roughly U-shaped cross-section as shown in Figure 2 and are conveniently made of sheet material, however it is obvious that any type of suitable construction could be utilized.
`~
To be able to lock the heel of the ski boot to a ski, it is pre-ferable to haYe a special attachment on the heel, and Figure 1 shows such an attachment 27, which is a curved plate 29 secured by screws 31 and having ~, a ridge 33 at its upper end which can be contacted by the front end of the ' ,1 ` .:
lever 21 which is formed with a suitable bearing surface 3S.
A coil spring 37 is stretched between axles 7 and 25, and, looking at Figure 1, it will be seen that pressure applied to dimple 19 will force levers 5 and 13 to an overcenter substantially longitudinally aligned posi-tion and hence rotate bell crank lever 21 so that its beaxing surface 35 pushed against ridge 33 on a ski boot heol. The spring 37 will hold levers S and 13 in the overcenter position. Pressure upon dimple 11 will rotate -j lever 5 in an anti-clock~ise direction and the spring 37 will then assist in the movement and rotate bell crank lever 21 so that pressure is removed ~ from the ridge 33 and the bearing surface 35 ls withdrawn away from the heel.
-~ Extension 1~ provides a stop for the relative movements o~ levers 5 and 13 30 ~hen in an aligned position, and extension 9 provides a stop for the move-ment of léver S against the ski during the unlocked position so controlling the amount of rotation of the bell crank lever 21.
, .
, ,~ .
.
In Figures 3 and 4 there is shown an embodiment of the apparatus of Figure l, which utili~es, instead oL bell crank lever 21, a line 39 which has a bearing surface 41 to which can be connected a plate 43 by studs 45.
j By utilizing such an arrangement, it is possible to replace plate 43 to take into account wear or different types of attach~ents on ski boot heels.
In Figures 5 and 6, a further e~bodiment is shown in which the plate as shown in Figures 3 and 4 is modified to include a V-shaped ridge 47 which cooperates with a V-shaped groove 49 which is formed in the ski boot attachment. By utili~ing such a structure, any transverse moYement between the ski and heel is also limited as well as the vertical movement.
; In the embodiment shown in Figure 7J the heel lock consists of a base 51, a first lever 53 pivotally secured by its rear end to the base 51 through an axle 55; a seond lever 57 pivotally secured to the front end of lever 53 by an axle 59, and a spring 61 between axle 55 and an axle 53 at the front end of the second lever. ~oth levers have e~tensions at their rearwardly facing ends which are respectively numbered 65 and 67 and they serve the sa~e purpose as extensions 9 and 17 as discussed with reference to Figure 1. At the front end oE the base 51 there is provided a block 59 having a longitudinal centrally located bore 71 through which a rod 73 can slide. The rod 73 has an enlarged end 75 which is pivotally secured to the front end of the second leYer through the axle 63. Alternatively, the en-larged part 75 can be formed with an integral axle 53 iE desired.
` The attachment to be fitted to a ski boot heel, in this instance, is of a U-shape having side portions 77 which are secured to a heel by screws i - 79, and a raised portion 81 having a hole 83 through wllich rod 73 can fit to locate the heel on a ski when required. The engagement and withdrawal :; of the rod 73 in hole 83 is controlled by pressing extension 75 to withdraw , the rod and pressing extension 67 to engage the rod.
Figure 8 shows an embodi~nent of an attachment to the heel of the ski boot which can be used as an alternative to the attachment shown in Figure 7, and it consists of an externally threaded member 85 having a bore ~ -4-., :
: ;' , ' ' ,' , : ' , ' ' ' " ' ' ' , ' ' ~5~jt5~
87 and a flange 89 for ~se in inserting member 85 into a prefoxmed hole in the heel. ~ore 87 is sized to accommodate rod 73.
: In ~igure 9 there is shown a means of pivoting the levers of the previous embodiments by utilizing a base 91 ~hich has transverse threaded bores 93 into which are inserted a ball 95, a spring 97, and a stud ~9.
The levers are provided with dimples 101 for accummodating the balls 95, and by utili~ing such a pivoting arrangement, a sa~ety release mechanism is created such that if an excessive load is placed upon the lock mechanism when it is holding a heel in place upon a ski, the lock will separate and free the heel so avoiding injury to the skier. Obviously, other types of arrangement of a similar type could be utiliæed to provide a release mechanism, although due to the loose fitting of cross-country ski boots, which permit the foot to be withdrawn from the boot during an excessive pulling force, such release mechanism need only be utilized if extra injury protection is required. ;
In Fi~ure 10 there is shown a final embodiment of the lock of this invention which consists of a base 102 which has vertical extensions 103 and 104. A lever 105 of substantially T-shaped section is pivoted at its central region by an axle 107 which passes through vertical extension 103. Operation of the lever is accomplished through extensions 109 and 111. The lower end of the lever 105 is pivotally secured through axle 113 to a rod 115 which is positioned so that it can reciprocate in a bore 117 provided in the second extension 104. A positioning arrangement is provided by a ball 119 spring loaded by spring 121 held in place by stud 123 such that the ball 119 can engage in detent 125 and 127. A heel attachment 129 to cooperate with the ~ . rod 115 can be of the same form as that shown in Fi~ures 7 or ~. ru ; n~ert c the rod 115 into the heel attachment, extension 109 is pressed so permitting ball 119 to fall in detent 127, and to withdraw rod 115 from the heel attach-ment, extenslon 111 is pressed so permitting ball 119 to fall into detent 125.
I~ will be seen that with any of the embodiments descxibed above it will be relatively easy to secure or xelease a heel to or from a ski while :i . . ., .. i .
the person i8 skiing merely by pushing the appropriate lever with a ski pole ~5~
,. , , , : ,. . . .
.. . . :
7~
tip such that when sections of a cross-country trail are approached which rcquire extra firm control of the skiis, the heel of the ski boot can be clamped temporarily to the ski until this seciton of trail has been trans-~, Yersed.
It is also to be understood that various ~odifications of thislock are envisaged within the scope of this invention which are only as limited by the following claims.
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This inyention relates to a ski boot heel lock and specifically a heel lock which can he used with cross-country or touring skis.
Cross country skiing re~uires a binding to attach a ski boot to ; that ski which permits the heel of the boot to lift fr~ the ski during use.
Bindings which hold only the toe o~ the boot to the ski are satisfactory for most of cross-country skiing, however there are downhill parts of ski trails upon which would be much easier to travel if the ski boot heel were attached to the ski. This would permit greater control of the skis, and would also encourage safer skiing particularly for those people who partake of both downhill and cross-country skiing, as there is a strong tendency for a down-hill skier to follow the downhill practice of leaning forward when cross-country skiing. Such a practice is disastrous with known cross-country bindings as the skier will topple forwards. The older type of bindings, such as a cable harness, held the toe of the boot onto the ski, and they could be arranged to hold down the heel of the boot onto the ski, however ~ such an arrangement would require stopping on the trail and coupling the ; heel end of the cable onto hooks attached to the ski. Such coupling would have to be done by hand and would also create a hazard on a ski trail by having to stop on the trail.
There is therefore a requirement to have a cross-country binding which can be quickly operated while skiing to clamp and unclamp the heel of a boot onto a ski.
This invention relates to a ski boot heel lock which can be used in conjunction wi~h cross-country bindings, the lock being operable during ., :
skiing to secure or free the heel of the boot. It is arranged so that it can be operated by the tips of the ski poles.
Generally, the invention in one of its embodiments consists of a hase plate secur~ble to a ski, a first lever pivotally secured to the rear end of the base plate, a second leYer pivotally secured to the front end of the first leYer, and a bell crank leYer secured by one of its ends to the front end of the base plate and by the midpoint to the front end of the second ., .
~1--~35~
leyer. The o~her end of the bell crank lever has a bearing surface which can clamp the heel of the ski boot to a ski through a corresponding bearing surface on the heel. By having extensions, at the rear end of the Eirst lever and the rear end of the second leYer, and a tension spring between the rear end of the first leYer and the front end of the second leYer, the clamping of the Eront end of the bell cr~nk lever to the heel can be achieved.
~ arious types oE structure can be used to achieve the same pur-pose as that achieved by the referred to embodiment, and there can also be provided a safety release mechanism if required.
The invention will now be described with reference to the accom-panying drawings in which:
Eigure 1 is a side elevational view of an embodiment of the apparatus of this invention showing part of a ski and ~ki boot, Figure 2 is a perspective view of the apparatus of Figure 1, Figure 3 is a side elevational view of a modified clamping means to that shown in Figure 1, -Figure ~ is a plain view of part of the modified clamping means of Figure 3, Figure 5 is a side elevational view of another type of clamping means which can be used with the embodiment of Figure 3, Figure 6 is a front eleYational view showing a heel element and the clamping means of Figure 5, Figure ~ is a further embodiment of the apparatus of th;.s inven-tion, Figure 8 i8 a partial side elevational view of a ski boot heel .
showing a modified connector for use with the embodiment of Figure 7, Figure 9 i8 a front sectional ~levational yiew sho~ing a safety release mechanism, and Figure lO is a side elevational view, partly in section, of another embodimen~ of the apparatus o this inYention.
~ ëferring specifically to Figures 1 and 2 the heel lock is depicted secured to a ski, part of which is shown. ~he heel lock consists ,. ~ , ',, ' ~ . , ' ,: ' .. ~ ., ' ' ~5~57~
of a base 1 haying holes fo~ acco~odatin~ screws 3. ~ first leyex 5 ~s piYotally secured to the rear end o~ the base 1, by a shaft 7. ~n extension 9 extends rearwardly past the shaft 7, this extension having a dimple 11 which can locate a ski pole tip.
A second lever 13 is piYotally secured at lts rear end to the front end of the first lever S, by a shaft 15. An extension 17 extends rear-` wardly of the axle 15 and has a dimple 19 for accommodating the tip of a ski pole.
A third bell crank lever 21 is pivotally secured by one end of the front end of the base 1 through an axle 23, and through its midpoint to .
the front end of the second lever 13 through axle 25.
The first, second and ~hird levers all have a roughly U-shaped cross-section as shown in Figure 2 and are conveniently made of sheet material, however it is obvious that any type of suitable construction could be utilized.
`~
To be able to lock the heel of the ski boot to a ski, it is pre-ferable to haYe a special attachment on the heel, and Figure 1 shows such an attachment 27, which is a curved plate 29 secured by screws 31 and having ~, a ridge 33 at its upper end which can be contacted by the front end of the ' ,1 ` .:
lever 21 which is formed with a suitable bearing surface 3S.
A coil spring 37 is stretched between axles 7 and 25, and, looking at Figure 1, it will be seen that pressure applied to dimple 19 will force levers 5 and 13 to an overcenter substantially longitudinally aligned posi-tion and hence rotate bell crank lever 21 so that its beaxing surface 35 pushed against ridge 33 on a ski boot heol. The spring 37 will hold levers S and 13 in the overcenter position. Pressure upon dimple 11 will rotate -j lever 5 in an anti-clock~ise direction and the spring 37 will then assist in the movement and rotate bell crank lever 21 so that pressure is removed ~ from the ridge 33 and the bearing surface 35 ls withdrawn away from the heel.
-~ Extension 1~ provides a stop for the relative movements o~ levers 5 and 13 30 ~hen in an aligned position, and extension 9 provides a stop for the move-ment of léver S against the ski during the unlocked position so controlling the amount of rotation of the bell crank lever 21.
, .
, ,~ .
.
In Figures 3 and 4 there is shown an embodiment of the apparatus of Figure l, which utili~es, instead oL bell crank lever 21, a line 39 which has a bearing surface 41 to which can be connected a plate 43 by studs 45.
j By utilizing such an arrangement, it is possible to replace plate 43 to take into account wear or different types of attach~ents on ski boot heels.
In Figures 5 and 6, a further e~bodiment is shown in which the plate as shown in Figures 3 and 4 is modified to include a V-shaped ridge 47 which cooperates with a V-shaped groove 49 which is formed in the ski boot attachment. By utili~ing such a structure, any transverse moYement between the ski and heel is also limited as well as the vertical movement.
; In the embodiment shown in Figure 7J the heel lock consists of a base 51, a first lever 53 pivotally secured by its rear end to the base 51 through an axle 55; a seond lever 57 pivotally secured to the front end of lever 53 by an axle 59, and a spring 61 between axle 55 and an axle 53 at the front end of the second lever. ~oth levers have e~tensions at their rearwardly facing ends which are respectively numbered 65 and 67 and they serve the sa~e purpose as extensions 9 and 17 as discussed with reference to Figure 1. At the front end oE the base 51 there is provided a block 59 having a longitudinal centrally located bore 71 through which a rod 73 can slide. The rod 73 has an enlarged end 75 which is pivotally secured to the front end of the second leYer through the axle 63. Alternatively, the en-larged part 75 can be formed with an integral axle 53 iE desired.
` The attachment to be fitted to a ski boot heel, in this instance, is of a U-shape having side portions 77 which are secured to a heel by screws i - 79, and a raised portion 81 having a hole 83 through wllich rod 73 can fit to locate the heel on a ski when required. The engagement and withdrawal :; of the rod 73 in hole 83 is controlled by pressing extension 75 to withdraw , the rod and pressing extension 67 to engage the rod.
Figure 8 shows an embodi~nent of an attachment to the heel of the ski boot which can be used as an alternative to the attachment shown in Figure 7, and it consists of an externally threaded member 85 having a bore ~ -4-., :
: ;' , ' ' ,' , : ' , ' ' ' " ' ' ' , ' ' ~5~jt5~
87 and a flange 89 for ~se in inserting member 85 into a prefoxmed hole in the heel. ~ore 87 is sized to accommodate rod 73.
: In ~igure 9 there is shown a means of pivoting the levers of the previous embodiments by utilizing a base 91 ~hich has transverse threaded bores 93 into which are inserted a ball 95, a spring 97, and a stud ~9.
The levers are provided with dimples 101 for accummodating the balls 95, and by utili~ing such a pivoting arrangement, a sa~ety release mechanism is created such that if an excessive load is placed upon the lock mechanism when it is holding a heel in place upon a ski, the lock will separate and free the heel so avoiding injury to the skier. Obviously, other types of arrangement of a similar type could be utiliæed to provide a release mechanism, although due to the loose fitting of cross-country ski boots, which permit the foot to be withdrawn from the boot during an excessive pulling force, such release mechanism need only be utilized if extra injury protection is required. ;
In Fi~ure 10 there is shown a final embodiment of the lock of this invention which consists of a base 102 which has vertical extensions 103 and 104. A lever 105 of substantially T-shaped section is pivoted at its central region by an axle 107 which passes through vertical extension 103. Operation of the lever is accomplished through extensions 109 and 111. The lower end of the lever 105 is pivotally secured through axle 113 to a rod 115 which is positioned so that it can reciprocate in a bore 117 provided in the second extension 104. A positioning arrangement is provided by a ball 119 spring loaded by spring 121 held in place by stud 123 such that the ball 119 can engage in detent 125 and 127. A heel attachment 129 to cooperate with the ~ . rod 115 can be of the same form as that shown in Fi~ures 7 or ~. ru ; n~ert c the rod 115 into the heel attachment, extension 109 is pressed so permitting ball 119 to fall in detent 127, and to withdraw rod 115 from the heel attach-ment, extenslon 111 is pressed so permitting ball 119 to fall into detent 125.
I~ will be seen that with any of the embodiments descxibed above it will be relatively easy to secure or xelease a heel to or from a ski while :i . . ., .. i .
the person i8 skiing merely by pushing the appropriate lever with a ski pole ~5~
,. , , , : ,. . . .
.. . . :
7~
tip such that when sections of a cross-country trail are approached which rcquire extra firm control of the skiis, the heel of the ski boot can be clamped temporarily to the ski until this seciton of trail has been trans-~, Yersed.
It is also to be understood that various ~odifications of thislock are envisaged within the scope of this invention which are only as limited by the following claims.
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.
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~:
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, ~, ::
: :
,........................................................................ .. .
.. ' , ,~
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. .
, ,: ,
Claims (15)
IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a ski lock having a base secured to a ski, a lever means secured to the base and having two extensions such that when one extension is pressed a bearing surface holds a ski boot heel against the ski and when the other extension is pressed the bearing surface releases the heel from the ski.
2. The lock of claim 1, wherein said lever means includes a first lever pivoted by one end to the base, and a second lever pivoted by one end to the other end of said first lever.
3. The lock of claim 2, wherein said lever means includes a third lever pivoted between the other end of said second lever and the base.
4. The lock of claim 3, wherein the bearing surface is integral with said third lever.
5. The lock of claim 3, wherein the bearing surface is releaseably secured to said third lever.
6. The lock of claim 1, including an attachment on the heel cooperable with said bearing surface.
7. The lock of claim 2, wherein said lever means includes a longitudinally reciprocable rod pivotally secured to the other end of said second lever.
8. The lock of claim 4 or 5, wherein said bearing surface has a V-shaped ridge for transverse location.
9. The lock of claim 6, wherein said attachment includes a ridge around the back of said heel.
10. The lock of claim 9, including a V-shaped groove in said ridge.
11. The lock of claim 6, wherein said attachment includes a longitudinally extending bore at the back of said heel.
12. The lock of claim 1, wherein said lever means includes a T-shaped lever having two extensions and a reciprocably mounted rod.
13. The lock of claim 12, including spring loaded halls secured from said base, and detents on said T-shaped lever cooperable with said balls holding said lever as required in its operable or non operable position.
14. The lock of claims 1, 2 or 3 wherein said lever means are pivotally mounted on the base by axles passing through the lever means.
15. The lock of claims 1, 2 or 3 wherein said lever means are pivotally mounted on the base by spring loaded balls biased into detents in the lever means so forming a safety release mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA238,577A CA1050579A (en) | 1975-10-29 | 1975-10-29 | Ski boot heel lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA238,577A CA1050579A (en) | 1975-10-29 | 1975-10-29 | Ski boot heel lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1050579A true CA1050579A (en) | 1979-03-13 |
Family
ID=4104390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA238,577A Expired CA1050579A (en) | 1975-10-29 | 1975-10-29 | Ski boot heel lock |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1050579A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4261595A (en) * | 1978-03-22 | 1981-04-14 | Smialowski Antoni J | Ski boot heel lock |
| US4417749A (en) * | 1980-09-03 | 1983-11-29 | Naepflin Hans | Ski binding with step-in frame |
| US4646586A (en) * | 1984-06-01 | 1987-03-03 | Antonio Rapisarda | Device for connecting a bicycle pedal to a cycling shoe |
-
1975
- 1975-10-29 CA CA238,577A patent/CA1050579A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4261595A (en) * | 1978-03-22 | 1981-04-14 | Smialowski Antoni J | Ski boot heel lock |
| US4417749A (en) * | 1980-09-03 | 1983-11-29 | Naepflin Hans | Ski binding with step-in frame |
| US4646586A (en) * | 1984-06-01 | 1987-03-03 | Antonio Rapisarda | Device for connecting a bicycle pedal to a cycling shoe |
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