Land vehicles – Skates – Shoe attaching means
Patent
1991-11-27
1993-03-16
Johnson, Brian
Land vehicles
Skates
Shoe attaching means
280632, A63C 918
Patent
active
051938405
DESCRIPTION:
BRIEF SUMMARY
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 sidewalls of the holding cup are connected by a crossbar in this known ski binding, which crossbar has a locking groove. The swivel part, which is pivotal with a holding cup about a common transversely extending axle carries on its upwardly directed extension an axle to which a lock part with a locking nose is hinged. The locking nose extends into the locking groove of the crossbar of the holding cup when the ski binding is closed. Such a cross country ski binding with the cross country ski boot, which fits the binding, can also be obtained commercially and has proven to be successful in practice.
However, it has been found that the closing of the binding may possibly be difficult when snow, ice or dirt has accumulated or been compacted under the holding cup or under the cross country ski boot during a stepping into the binding. The holding cup is in such a case not completely swung down and the locking nose of the lock cannot fully extend into the locking groove of the holding cup. The locking nose of the lock presses onto the crossbar caused by the force of the locking spring, however, an unintended opening of the ski binding can occur in the case of very strong vibrations.
The purpose of the invention is to improve the known ski binding such that a reliable closing of the same occurs even when snow, ice or dirt accumulations prevent the complete downward swing of the holding cup. In particular a stepless adjustment of the lock part is thereby desired in case the amount of snow or dirt under the holding cup becomes slowly worn away during skiing. Furthermore, the entire height of the ski binding is less.
SUMMARY OF THE INVENTION
The objects and purposes of the invention have been met by providing a ski binding for a cross country ski or touring ski. The ski binding includes a swivel part and a holding cup both pivotal about a transversely extending first axle against the force of an elastic element in unison as well as with respect to one another. The swivel part is constructed as a two-arm toggle lever and carries therewith a locking pin on a first lever arm thereof and a second axle for a lock part on a second lever arm thereof. The holding cup has in a front area thereof a crossbar connecting its sidewalls, which crossbar is constructed as a locking nose at its front end. The locking nose is defined by a first arcuate surface extending around the transversely extending first axle and a contiguous arcuate holding surface. A lock part is provided and includes an arcuate surface region around the second axle. When the ski binding is in the closed position, tangential planes tangent to the arcuate holding surface and to the arcuate surface region define a forwardly open acute angle .alpha. in a range of 1 to 15 degrees (preferably 3 to 10 degrees) with respect to one another.
Due to the face that the holding cup has in its front region a crossbar connecting its sidewalls, which crossbar is constructed as a locking nose having at its front end a first surface extending approximately in the form of a cylindrical sleeve section extending around the transversely extending axle and with a contiguous second surface designed like a further cylindrical sleeve section and extending in direction of the transversely extending axle and operating as a holding surface, that the lock has a locking region arranged around the locking axle along a cylindrical sleeve section, and that, viewed in the closed and not stressed position of the ski binding, the axis of the cylindrical sleeve section forming the holding surface is spaced forwardly from the axle of the cylindrical sleeve section forming the locking region, it is guaranteed that even without a complete downward swinging of the holding cup the locking region of the lock part grips sufficiently far under the holding surface of the locking nose that a reliable c
REFERENCES:
patent: 4722613 (1988-02-01), Jungkind
patent: 4909532 (1990-03-01), Provence et al.
patent: 4917399 (1990-04-01), Holzl
Erdei Roland
Spitaler Engelbert
Wittman Heinz
HTM Sport- und Freizeitgeraete Gesellschaft m.b.H.
Johnson Brian
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