Patent ID: 7297066
Filing Date: 2007-11-20
Classification: F16D,F16J

Abstract:
1. A resin joint boot comprising: a cylindrical large-diameter attachment part at one end thereof to be attached to an outer housing whose outer peripheral contour is configured with a plurality of recessed portions in the circumferential direction; a cylindrical small-diameter attachment part at the other end thereof to be attached to a shaft; and a bellows part interconnecting integrally both, the large-diameter attachment part assuming at its outer peripheral face a circular form in cross-section, being provided, on its external peripheral face, with a circumferentially extending recessed portion for fixation for receiving thereon a ring-form clamping member and being provided, at its inner periphery, with a plurality of lobe portions protruding inward radially in a distributed manner in the circumferential direction; wherein the lobe portions are each made up of an inner wall portion jutting inward radially in a curved form and mating with the recessed portion, an arc-like outer wall portion constituting part of the external peripheral face of the large-diameter attachment part, and a strut wall supporting the inner wall portion relative to the outer wall portion; a tongue-like piece in a manner projecting outward axially is integrally provided on the large-diameter attachment part, at an opening edge face thereof, which is located on the axial outer side and outside of the recessed portion for fixation, and the tongue-like piece is disposed alongside of an external peripheral margin of the opening edge face at an edge face of the outer wall portion of at least one of lobe portions.