Patent ID: 7488259
Filing Date: 2009-02-10
Classification: B29C,B29L,F16D,Y10S

Abstract:
1. A resin boot for constant velocity universal joint, comprising: a resin bellows including an approximately conical bellows-shaped portion with an inner hollow space, a small diameter side end portion communicated with the inner space of the bellows-shaped portion and arranged at one end thereof, and a large diameter side end portion communicated with the inner space of the bellows-shaped portion and arranged at the other end thereof; a different thickness portion including a plurality of large thickness portions protruded toward a central axis of the large diameter side end portion and arranged in a circumferential direction at approximately regular intervals and a plurality of small thickness portions, each arranged between the adjacent plurality of large thickness portions and formed thinner in a diametrical direction than the large thickness portions, and formed such that the plurality of large thickness portions and the plurality of small thickness portions are continuously formed in the circumferential direction; and an integrally welded portion between an inner surface of the large diameter side end portion of the resin bellows and the different thickness portion, wherein a different thickness portion is welded and integrated with the inner surface of the large diameter side end portion of the resin bellows by injection molding, whereby the integrally welded portion is formed.