Land vehicles – Skates – Shoe attaching means
Patent
1990-03-02
1991-08-27
Mitchell, David M.
Land vehicles
Skates
Shoe attaching means
280611, A63C 900
Patent
active
050428306
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a sole-support plate for ski bindings.
BACKGROUND OF THE INVENTION
A sole-support plate of this type is perhaps described, for example, in Austrian Patent No. 356 561 (corresponding to U.S. Pat. No. 4,268,062). The sole-support plate is thereby held against an unintended lifting off in its mounted state in the form of a spring/groove guide on the base plate of the ski-binding part by means of its two lateral extensions. To lock the sole-support plate on the ski-binding part against a movement in longitudinal direction of the ski, of course further structural parts, as for example, a detent cooperating with a locking recess on the other structural part of the ski binding, are needed.
A further development of this known solution according to Austrian Patent No. 363 020 (corresponding to U.S. Pat. No. 4,268,062) also does not overcome this disadvantage.
Austrian Patent No. 361 824 discloses an adjusting plate, which will be removed after the ski binding has been screwed on tightly. The extensions of the adjusting plate, which extensions are used to receive the screws, are for this purpose provided with fork prongs, which are broken off by the force occurring during tightening of the screws (compare Page 5, lines 17 to 25). Thus the extensions disclosed in this reference cannot be compared to the keyhole-like recesses used in the invention to constantly hold the sole-support plate on the fastening screws. They also do not suggest the solution of the invention.
Devices with keyhole-like constructed recesses on the upper side of the ski or on mounting plates for receiving locking elements provided on ski-binding parts are known from German OS Nos. 23 63 562 and 26 13 387. Of course, these keyhole-like recesses are designed with a closed contour since the locking elements of the binding members are guided exclusively from above into the recesses. A keyhole-like recess with a free straight section, as this is disclosed in the closest state of the art according to Austrian Patent No. 356 561 and has already been considered above, is not disclosed in these two references.
SUMMARY OF THE INVENTION
The purpose of the invention is to provide a sole-support plate of the above-mentioned type such that, aside from the fastening screws needed for fixing the ski-binding part on a ski, no further structural parts are needed for mounting the sole-support plate.
Since according to the invention, the fastening screw acts as a block engageable with a detent in a recess in the sole-support plate, which recess is shaped like a keyhole and opening frontwardly in its straight section to serve as a matching notch, a separate locking mechanism is not needed. Due to the fact that the sole-support plate has at its area facing the ski-binding part the keyhole-like recess, the centerline of which is in alignment with the centerline of the fastening screw on the ski-binding part, the detent being formed by fastening screw itself, a mounting or demounting of the sole-support plate on the ski-binding part is easily possible.
In view of the forces occurring both outwardly and also inwardly in the horizontal plane on the ski-binding parts, it is advantageous to provide a pair of screws symmetrically on opposite sides of a center axis of the base plate.
Actually it would be possible to design the recesses in the sole-support plate, which recesses receive the screwheads, to be suitable for countersunk screws. However, it has been proven to be advantageous if these bores are receiving points with a clearance of approximately 0.5 mm for fillister-head screws. This simplifies the manufacturing process since no attention need be paid to tolerances on fit and still a connection safe from an unintended relative movement between the fillister-head screw and the recesses is guaranteed. A seal ring provided around each fastening screw creates a safe closure for preventing snow, ice and other undesired contaminants from penetrating into the bore holding the screw.
To be complete, it is mentioned that
REFERENCES:
patent: 3977688 (1976-08-01), Imagawa
patent: 4268062 (1981-05-01), Wittmann
patent: 4522422 (1985-06-01), Jaeger
Erdei Roland
Wladar Helmut
Wurthner Hubert
Zotter Johann
Mitchell David M.
TMC Corporation
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