Ski binding for a cross-country or touring ski

Details Ski binding for a cross-country or touring ski Ski binding for a cross-country or touring ski

1988-09-22

1991-02-19

Bertsch, Richard A.

Land vehicles

Skates

Shoe attaching means

A63C 900

Patent

active

049937421

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention relates to a ski binding for a cross-country or touring ski.
2. Description of the Related Art
The type of ski binding mentioned in the introduction is described in Austrian Patent B 357,081. This binding is put on by inserting the sole extension of the ski boot into a retaining shell, during which procedure converging side walls of the stirrup facilitate the insertion. When the retaining shell is then pressed down, which causes the binding to be locked, locking pins enter retaining shell and openings in the sole extension of the ski boot. One disadvantage of this binding is that the retaining shell with its sole plate tilts about an axis located rather far behind and that the swivel axis for the relative motion of the retaining shell and the pivoting part carrying the locking pins lies substantially above the ski surface, thus preventing a natural rolling movement of the sole of the foot on the upper side of the ski. The insertion of the ski boot into the retaining shell from the bottom upwards is unnatural and thus uncomfortable. Furthermore, the anchoring of the retaining shell on the lateral surfaces of the ski is disadvantageous for reasons of stability. Also, arrangement of a movable element projecting outwards from the lateral surfaces of the ski deleteriously affects the skier's motions.
The invention has for its object to adapt, in a ski binding of the kind referred to in the introduction, the skier's stepping into the binding with the ski boot and his striding to the natural motions of the foot and to provide a compact arrangement of the entire ski binding.
This object is achieved by the features of the present invention.
The expedients advocated by the invention ensure an easy and safe stepping into the binding and natural motions during the striding. The whole binding has a compact construction so that there are no components that would protrude from the sides of the ski.
With the ski binding which is described in an older non-prepublished European Application (No. 85112147.5) of the applicant and which constitutes an internal state of the art, retaining shell and pivoting part can be pivoted about a common transverse pin against an elastic element. This transverse pin is held by a supporting structure mounted on the ski. The transverse pin is located in the front area of the two aforementioned components and a spring exerts pressure on retaining shell and pivoting part with the object of forcing them apart. Furthermore, the spring plunger is mounted on an extension of the pivoting part on a pin and, when the binding is in the closed position, locks into a crossbar--provided with a latching groove--of the retaining shell.
Generally, this construction has stood the test of time, but the retention of the ski boot was unsatisfactory, because it wobbled in the retaining shell. In addition, the presence of snow in the binding made stepping-in difficult. Also, there was no expedient that would prevent the spring plunger from opening inadvertently when it strikes an obstacle during striding. The spring that serves to force apart retaining shell and pivoting part is limited in its dimensions, and thus also in its action, because of design considerations. On stepping into the binding, the retaining shell could swing downwards even before the ski boot was firmly seated in the retaining shell because of its limited closing force.
To overcome the disadvantages of this older approach, the invention aims at achieving several objects, which will be discussed hereinbelow. A first object is to improve the retention of the ski boot in the retaining shell, even in the event that there is snow in the binding.
This object is achieved by the present invention.
The expedients taught by the invention ensure good retention of the ski boot in the retaining shell.
By virtue of the expedients of the present invention the optimum angle of the bearing surfaces is fixed at about 45.degree. so that, on the one hand, if snow is deposited on the bearing surfac

REFERENCES:
patent: 4484762 (1984-11-01), Salomon
patent: 4533154 (1985-08-01), Bernard et al.

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