Land vehicles – Skates – Shoe attaching means
Patent
1987-11-30
1989-08-22
Marmor, Charles A.
Land vehicles
Skates
Shoe attaching means
280628, A63C 9081, A63C 920
Patent
active
048589462
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a safety ski binding and, in particular, to a ski binding which facilitates release of a ski boot in response to a torsion fall.
A conventional safety ski binding is described in German Patent Publication No. DE-A1-33 42 155. The release of a ski boot from the ski binding disclosed in this publication performs unsatisfactorily in the event of a torsion fall. According to the conventional ski binding, when a sole plate supporting a ski boot is urged to swing laterally, the bias of the locking spring, which keeps the sole plate in the skiing position, is increased. Oftentimes, such bias may produce excessive force, particularly around the location of the skier's ankle.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to eliminate this disadvantage and to provide a safety ski binding which ensures an additional release of the ski boot by movement of the heel holder relative to the sole plate in response to a pure horizontal load. A release of the heel holder may also be provided in response to a rearward torsion fall of the skier.
Additional objects and advantages of the invention will appear in the following description, and other objects and advantages will be obvious from that description. The stated objects and advantages of the invention may be realized by the apparatus and methods particularly pointed out in the appended claims.
To achieve the objects and purposes of the invention, a safety ski binding of this invention comprises a base plate adapted to be fastened to the upper side of the ski and supporting a vertical pivot. A sole plate is pivotally mounted on the pivot and includes at its rear end a heel holder having a sole support. The sole support is acted upon by a locking spring and supports a holding jaw at its front end. The sole plate is pushed by this locking spring in the direction of its central position by means of a roller. The heel holder support has a bearing block that is pivotable with its base about a vertical axle. The sole support and a spring fork receiving the locking spring are mounted on a transverse axle. A locking lever is mounted in the sole support on a further transverse axle having a nose which is detachably locked in the skiing position of the heel holder at the front side of the bearing block. The nose is acted upon by the locking spring via a pressure element. A tread spur, as is generally known from Austrian Patent Publication No. AT-A2- 378 691, is linked to the sole support and is supported on the the sole support when the holding jaw is in the skiing position. The vertical axle for the bearing block is fastened to the sole plate. A further roller is allocated to the bearing block, which is urged by an additional pressure spring against a horizontal cam disposed on the base plate, thereby securing the base of the bearing block against a horizontal swing in the skiing position.
Also, in accordance with the present invention, the roller is mounted on a vertical axle, which is displaceably guided in a slot of the sole plate in the longitudinal direction thereof. This axle supports a horizontal locking pin which projects in the skiing position between the two prongs of a fork bent off from the base of the bearing block.
Further, in accordance with the present invention, the roller is acted upon by the locking spring and is mounted on the sole support. The roller is supported on a cam formed at a bent section of the base plate. The bent section of the base plate extends within a circular-arc-shaped oblong hole in the sole plate, the center of which is along the geometrical axis of the pivot.
Still further, in accordance with the present invention, the spring acting upon the roller is a pressure spring which is adjustable in its bias, such that the spring abutment remote from the roller is in the form of a piston which is mounted in the sole plate and secured against twisting. The piston can be displaced by means of a knurled screw, which is screwed into a threaded bore of a lug of the
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Freisinger Henry
Luschnig Franz
Stritzl Karl
Finlay Tamara L.
Marmor Charles A.
TMC Corporation
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