Land vehicles – Skates – Shoe attaching means
Patent
1990-06-06
1993-04-27
Mitchell, David M.
Land vehicles
Skates
Shoe attaching means
280634, A63C 908
Patent
active
052055752
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a front jaw for holding a ski boot to a ski using a pair of toggle levers which laterally engage the sides of a toe region of the ski boot, and a sole down-holding mechanism oriented between the pair of toggle levers.
BACKGROUND OF THE INVENTION
Such a front jaw is already described in AT-PS 321 170. However, this front jaw has the disadvantage that the release spring is only slightly compressed during a backward twisting fall and thus the work to be done by the swinging-out toggle lever is reduced. During a forward fall, combined with a twisting fall, the release spring did not compress.
In a front jaw with laterally spaced toggle levers the measure of increasing the initial tension of the release spring during a combined frontal and twisting fall and thus reducing the work to be done during a swinging out of one toggle lever, is already known as shown by DE-PS 2 905 837. However, the effect occurs here only during a frontal fall and not also during a backward fall, which is combined with a twisting fall.
In a front jaw according to AT-PS 372 616, the shorter arms of the two toggle levers are supported on a bifurcated intermediate lever. The horizontal arm of the intermediate lever is thereby loaded by a separate sole down-holding means, which is arranged on a vertical locking bolt. Same is supported elevationally movably in a guideway in the base plate. Furthermore, the path of movement of the locking bolt is limited because of the design (compare AT-PS 372 616).
The purpose of the invention is to overcome the disadvantages of the known designs and to provide a particularly simple solution, with which an initial tension of the release spring occurs during a forward fall and during a backward fall, which falls can be combined with a twisting fall.
SUMMARY OF THE INVENTION
A front jaw having two laterally spaced toggle levers which can be swung out against the force of a release spring housed in a housing and through which housing extends a pull rod. In order to cause in this front jaw, during a backward twisting fall, an initial tension of the release spring and thus a reduction in the work of the swinging out toggle lever, the two shorter lever arms of the toggle levers are loaded by a release spring acting through a pull rod onto an angular movable intermediate lever supported on the housing for movement about a pivot axle. The housing consists of first and second parts, of which the first part is fastened to an upper side of the ski. The second part of the housing supports the pivot axle for the intermediate lever. The two toggle levers are pivotally supported each on a further pivot axle inclined with respect to the upper side of the ski. The second part is pivotal about a still further pivot axle extending spaced from the upper side of the ski.
BRIEF DESCRIPTION OF THE DRAWINGS
Exemplary embodiments of the subject matter of the invention are illustrated in the drawings.
FIG. 1 is a vertical longitudinal center cross-sectional view of a first embodiment of a front jaw in the skiing position, and
FIG. 2 is a cross-sectional view taken along the line II--II of FIG. 1.
FIGS. 3 and 4 are vertical longitudinal center cross-sectional views of the front jaw during a frontal fall and during a backward fall.
FIG. 5 illustrates a modification of the embodiment according to FIGS. 1 to 4 in a vertical longitudinal center cross-sectional view, and
FIG. 6 is a cross-sectional view taken along the line VI--VI of FIG. 5.
FIG. 7 illustrates a third embodiment in a vertical longitudinal center cross-sectional view in the skiing position, and
FIG. 8 is a cross-sectional view taken along the line VIII--VIII of FIG. 7.
FIG. 9 illustrates a further embodiment in a vertical longitudinal center cross-sectional view, and
FIG. 10 is a cross-sectional view of a detail taken along the line X--X of FIG. 9.
DETAILED DESCRIPTION
The front jaw illustrated in FIGS. 1 and 2 is identified in its entirety by the reference numeral 300. It has a base plate 301 secured on a ski 3
REFERENCES:
patent: 4336956 (1982-06-01), Richert et al.
patent: 4538828 (1985-09-01), Dimier
patent: 4889359 (1989-12-01), Kowatsch et al.
patent: 5040821 (1991-08-01), Berthet et al.
HTM Sport- und Freizeitgeraete Gesellschaft m.b.H.
Mitchell David M.
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