Patent ID: 6202813
Filing Date: 2001-03-20
Classification: B60B,F16D,Y10T

Abstract:
A ratchet mechanism for a bicycle hub comprising:a first hub member (20,20') having a first peripheral surface;a second hub member (7,75) having a second peripheral surface facing the first peripheral surface;wherein the first hub member (20,20') and the second hub member (7,75) are rotatable relative to each other;a plurality of pawls (30,30') supported by the first hub member (20,20');a plurality of ratchet teeth (11,11') supported by the second hub member (7,75);a biasing mechanism (23,95) for biasing the plurality of pawls (30,30') toward the plurality of ratchet teeth (11,11'); anda pawl control mechanism (60,100) disposed between the first peripheral surface and the second peripheral surface and responsive to relative rotation of the first hub member (20,20') and the second hub member (7,75) for allowing at least one of the plurality of pawls (30,30') to contact the plurality of ratchet teeth (11,11') when the first hub member (20,20') and the second hub member (7,75) rotate relative to each other in one direction and for preventing each the plurality of pawls (30,30') from contacting the plurality of ratchet teeth (11,11') when the first hub member (20,20') and the second hub member (7,75) rotate relative to each other in an opposite direction.