Patent ID: 7128511
Filing Date: 2006-10-31
Classification: F16B

Abstract:
1. A fastener comprising a body with a thread formed thereon, said body having an end face, a cage rotatably secured to said body and having a radial face directed toward said end face and side walls extending toward and overlying a portion of said body to inhibit axial separation, and a flat washer interposed between said body and said cage, said washer having an inner periphery and an outer periphery with a pair of oppositely directed radial faces extending between said inner and outer peripheries, one of said faces being directed toward said end face of said body and the other of said faces being directed toward said radial face of said cage, opposed pairs of said faces abutting over substantially the entire radial extent thereof upon initial engagement, said faces having complementary cam surfaces formed thereon between said inner periphery and said outer periphery to induce relative axial movement upon rotation between said faces, said cam surfaces including a plurality of inclined facets having an angle of inclination greater than the helix angle of said thread.