Patent ID: 7559612
Filing Date: 2009-07-14
Classification: B60B

Abstract:
1. A cover for an internally geared bicycle hub comprising: a generally cup-shaped annular housing including a base portion defining a centrally located driving member opening and an outer rim portion located radially outward of the base portion with at least two radially projecting protuberances configured and arranged to engage a cover mating structure on an internally geared bicycle hub; an inner annular seal disposed on the base portion of the annular housing about the driving member opening, the inner annular seal having a resilient seal element and a rigid reinforcement element; and an outer annular seal disposed on the outer rim portion of the annular housing and facing in a substantially opposite radial direction from the radially projecting protuberances, the annular housing further including an inner projecting part extending radially from the base portion into a recess of the inner annular seal such that the inner annular seal is disposed on opposite axial sides of the inner projecting part, and a circumferential flange extending axially from the base portion and coaxially arranged about the driving member opening such that the circumferential flange forms a seat for the inner annular seal and acts as a torque barrier to the inner annular seal, and the rigid reinforcement element being located on a first axial side of the inner projecting part and the outer annular seal being located on a second axial side of the inner projecting part which is opposite the first axial side.