Patent ID: 8057340
Filing Date: 2011-11-15
Classification: F16G

Abstract:
1. A chain having inner links with right and left inner plates, each having a pair of bushing holes, a pair of front and rear bushings having central portions spanning between and having two bushing end portions press-fitted into said bushing holes of said right and left inner plates , said chain having outer links with right and left outer plates, each having a pair of pin holes, a pair of front and rear pins press-fitted into said pin holes of said pair of right and left outer plates, pair of pins passing through said bushings, said bushing holes and having two pin end portions press-fitted into said pin holes to cause said inner and outer links to be alternately connected to each other in a longitudinal direction of the chain, wherein the inner circumferential surface of said bushing has at least one groove in the axial direction thereof, and inner circumferential edge portions of both of said bushing end portions are chamfered, said chain including a resin liner member composed of a self-lubricating resin capable of melt-fabrication insert-molded on an inner circumferential surface of said bushing such that the outer surface of the resin member has a central portion which confronts the central portion of said bushing in the axial direction thereof, and said resin member has a solidified protrusion in said groove, and wherein further said resin liner member has flared end portions complementary to said chamfered edge portions of said inner circumferential bushing end portions, and capturing said bushing between said flared end portions to prevent axial displacement of said resin liner member within said bushing.