Patent ID: 7510057
Filing Date: 2009-03-31
Classification: B60T,F16D

Abstract:
1. A parking brake device for a vehicle having a plurality of wheels, having at least one freewheel lock, the freewheel lock comprising: an inner ring, and an outer ring, wherein the inner ring and the outer ring have faces which are situated so as to face toward one another and are formed as opposing cone faces forming an annular gap, wherein a plurality of brake bodies designed as conical rollers are arranged between said faces, wherein the conical rollers are movable by associated actuating members into a release position and into a braking position, and wherein a cone angle of each conical roller is smaller by a defined magnitude than a limit angle arising from a value of the tangent taking into consideration friction angles between the conical rollers and the cone faces of the inner ring and the outer ring.