Patent ID: 7478885

Claim:
A cap member for an internally geared bicycle hub comprising: a cap body including an outer cylindrical part having a threaded section configured to threadedly engage a hub shell of the internally geared bicycle hub, the outer cylindrical part having a first axial end section and a second axial end section, the first axial end section extending toward an outboard end of the internally geared bicycle hub and the second axial end section extending toward an inboard area of the internally geared bicycle hub, and a side wall part having a central opening configured such that a driver of the internally geared bicycle hub disposed at least partially inside the hub shell can extend therethrough, the side wall part being configured to extend radially inward from the first axial end section of the outer cylindrical part; a first seal member arranged on the side wall part of the cap body and configured to contact the driver, the side wall part including an inner cylindrical part adjacent to the opening, and the first seal member being installed on an internal circumferential surface of the inner cylindrical part, the first seal member being elastically secured to the internal circumferential surface of the inner cylindrical part; and a second seal member made of an elastic material, arranged at the second axial end section of the outer cylindrical part, the second seal member configured to contact the hub shell, the second seal member is being installed in an annular recess formed at the second axial end section of the outer cylindrical part, such that the second seal member protrudes axially further than the second axial end section away from the first axial end section.