Land vehicles – Skates – Shoe attaching means
Patent
1991-11-27
1993-03-02
Camby, Richard M.
Land vehicles
Skates
Shoe attaching means
A63C 900
Patent
active
051903091
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a ski binding for a cross country ski or touring ski;
BACKGROUND OF THE INVENTION
Such a ski binding is described in the WO 87/03211 (corresponding to U.S. Pat. No. 4,993,742). The swivel part in this known ski binding is designed as a toggle lever and can, in the closed position of the binding, be swivelled together with the holding cup against the force of an elastic element. Such a cross country ski binding with the cross country ski boot fitting said binding is commercially available and has proven to be successful.
The elastic element is in this known cross country ski binding arranged in front of the swivel part and is supported on an upwardly directed arm of the swivel part. The elastic element itself is designed as a plastic block. This plastic block rests in the non-stressed position of the binding flat on the forwardly directed side of the swivel part. The swivel part together with the holding cup is swivelled upwardly during the walking movement, with the elastic element being compressed. The point of application of the respective restoring force changes during the swivelling caused by the swivelling movement and the change in form of the compressed elastic element. Furthermore, a problem results with the use of plastic springs in that the spring action is, among others, influenced by the outside temperature. Furthermore, plastic springs age relatively quickly under the influence of the weather and sun and must then be replaced.
A similar ski binding in EP-A2 0183000 suggests a use of a compression spring as the elastic element. However, this compression spring is also arranged in front of the swivel part and is supported on its forwardly directed side. Therefore, this known ski binding has also the problem of not exactly defining a point of application of the restoring force. Furthermore, the spring is subjected to weather and in particular to dirt and ice.
The purpose of the invention is to avoid the disadvantages of the known ski bindings and to design a ski binding of the above-mentioned type such that the restoring force of the spring is applied to a point selectable by the designer and also the spring characteristic can be designed selectively and is essentially independent of outside influences, like temperature, weather and dirt.
SUMMARY OF THE INVENTION
The objects and purposes of the invention have been met by providing a ski binding for a cross country or touring ski. The ski binding includes a swivel part and a holding cup both pivotal in unison about a transversely extending axle against the force of an elastic element and also with respect to one another. The swivel part is a two-arm toggle lever and carries a locking pin on a first lever arm thereof and an axle for a lock part on a second lever arm thereof. The second lever arm of the swivel part extends downwardly and forwardly. The elastic element includes a spring arranged in an elongated recess in the base plate of the bearing block and directly stresses the second lever arm of the swivel part.
The set goal is achieved according to the invention due to the fact that the second lever arm of the swivel part, viewed in the closed and not stressed position of the ski binding, extends directed downwardly and forwardly, it is possible to arrange the elastic element protected in the ski binding housing below the swivel element. This enables also the use of a metal spring which is applied to a point on the second lever arm of the swivel part, which point can be selected by the designer.
Another aspect of the invention is that the spring is supported at one end on a support surface of the second lever arm of the swivel part and at the other end on a rear boundary wall of the elongated recess and according to which the second lever arm carries a projection for the support and mounting of the spring. This is a particularly advantageous embodiment of the ski binding embodying the invention.
A still further aspect of the invention is a feature that enables the selective limitation of t
REFERENCES:
patent: 4993742 (1991-02-01), Wittmann et al.
patent: 5044655 (1991-09-01), Garou
Erdei Roland
Spitaler Engelbert
Wittmann Heinz
Camby Richard M.
HTM Sport-und Freizeitgeraete Gesellschaft m.b. H.
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