Patent ID: 6241268
Filing Date: 2001-06-05
Classification: A61G

Abstract:
Arrangement of a wheelchair drive ring for a wheel of a wheelchair, wherein:the wheelchair drive ring is separate from the wheel of the wheelchair and exhibits a drive-actuating surface facing in a direction outward from the wheelchair wheel,the wheelchair drive ring having means for attachment to a rim of the wheelchair wheel,with respect to a top dead center cross section, an upper concave drive-actuating surface of the wheelchair drive ring is transformed directly into a lower convex drive-actuating surface, which is transformed into a circular gripping part on the underside of the upper-facing drive-actuating surface,said upper concave drive-actuating surface and the gripping part of the wheelchair drive ring are transformed jointly into a downward angled finger guard,said finger guard extending in towards a center of the wheel,friction increasing gripping material is provided only on the upper concave drive-actuating surface,the wheelchair drive ring is formed by a hollow profile, which extends along a periphery of the wheelchair drive ring,the upper concave drive-actuating surface is formed by the upper surface of a tapering cross-sectional part of the hollow profile facing upward at an angle,the finger guard is formed by a prolongation of the tapering end of the hollow profile, andthe drive-actuating surface and the finger guard extend around the periphery of the entire wheelchair drive ring.