Land vehicles – Skates – Shoe attaching means
Patent
1991-11-27
1993-08-31
Culbreth, Eric D.
Land vehicles
Skates
Shoe attaching means
280626, 280629, A63C 9081
Patent
active
052402754
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a safety ski binding.
A safety ski binding of that kind is known and is illustrated in attached FIGS. 1 and 2. It has a sole plate 1, on the front end of which is arranged a holder, as generally indicated by reference numeral 2, for the front edge of the sole of a ski boot 3, while arranged on the sole plate 1 at the rear end thereof is a heel holder 4. The invention is concerned solely with the front holder so that the nature and configuration of the heel holder 4 will not be discussed in detail here and hereinafter in the description of the embodiments by way of example of the invention.
Two sole holders 6 are mounted pivotably by means of pins 7 at the front end of the sole plate 1 which is pivotable about a pin 5, parallel to the surface of the ski. Pivotally connected to the front end of each sole holder 6 is a guide link 8 which in the illustrated holding position of the sole holders 6 bears against the periphery of a release member 9. The release member 9 is pivotably mounted on a pivot axis member 10 and has an abutment finger 11. The two guide links 8 are so oriented relative to the pivot axis member 10 of the release member 9 that the line of their bearing support force intersects that axis member or extends slightly behind same. In addition the two guide links 8 are drawn into a position of bearing against a shoulder on the release member 8, which can be seen in FIG. 2, by a leg spring 12.
In the illustrated holding position of the sole holders 6 they embrace the front edge of the sole of the ski boot 3 and hold it firmly on the sole plate 1, in relation to lateral movements. In addition, the sole plate 1 is resiliently fixed in relation to lateral pivotal movements about the pin 5 by holding means of the heel holder which are known and are therefore not to be described in greater detail herein (see for example EP-A-69 753). If now the foot of the skier is subjected to a lateral torque loading which overcomes the resilient holding means, the holding means permit a lateral pivotal movement of the sole plate 1 about the pin 5, with the entire sole holder 2 also moving with the sole holders 1 in an unchanged holding position. If that lateral torque loading is of only short distance, for example in the situation involving a lateral blow against the ski, the sole plate 1 is returned to its initial position under the effect of the resilient holding means. In that situation there is no safety release action. If however the torque loading is of longer duration, which involves the risk of injury to the leg of the skier, then the sole plate 1 is pivoted further until a pivot angle which is predetermined by virtue of the abutment finger 11 bearing against a wall 13 which is fixed with respect to the ski (see FIG. 1) is exceeded. That causes the abutment finger 11 and therewith the release member 9 to be pivoted so that, depending on the respective direction of pivotal movement, one of the two guide links 8 is moved out of its support position by the shoulder disposed on the release member 9. As soon as the line of the bearing force of that guide link 8 passes in front of the pivot axis member 10, it is no longer possible for the guide link 8 to be supported against the release member 9; the associated sole holder 6 is pivotally deflected and releases the ski boot 3.
That safety ski binding is not without its disadvantages which will now be discussed with reference to FIG. 9: FIG. 9 shows in purely qualitative terms in solid line the desired force/travel configuration of the release force acting on the sole plate 1, during a safety release operation. Accordingly, at the beginning of the pivotal travel of the sole plate 1, the force applied by the holding means of the heel holder 4 is supposed quickly to attain its full value and then remain substantially constant over the entire release travel until safety release occurs, that is to say, until there is a lateral pivotal movement of one of the sole holders 6. When the sole holder 6 is released the spring force of the holding means de
REFERENCES:
patent: 3907318 (1975-09-01), Salomon
patent: 4479664 (1984-10-01), Gertsch
patent: 4779891 (1988-10-01), Freisinger et al.
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