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US 4,764,068 AGranted
Knurled cup-point set screw
AssigneeSPS Technologies, Inc.
InventorCorey Crispell
Life of this patent
Estimating the term…
Abstract
A set screw having a novel cup-point for engagement with a shaft or rod. The cup-point has knurling on a portion of its outer circumferential surface and is provided with a smooth frustoconical surface portion adjacent the knurling such that, in use, the smooth surface portion of the cup-point engages the surface of the rod or shaft before the knurling.
Claims6
A set screw comprising:
- a shank having a longitudinal axis and having exterior threads along most of its length, said shank further comprising:
- a frustoconical portion formed with and defining one end of said shank, said frustoconical portion having the same longitudinal axis as said shank and a larger diameter equal to the diameter of, and coterminous with, the threaded portion of said shank;
- a cavity formed within said frustoconical portion in the end of said shank, said cavity being defined by a first portion immediately interior to the outermost portion of said frustoconical portion and comprising a generally cylindrical wall concentric with the longitudinal axis of said shank,
- said cavity cooperating with said frustoconical portion to define therebetween an annular wedge concentric with the longitudinal axis of said shank and terminating in a circular edge, said circular edge defining a plane normal to the longitudinal axis of said shank;
- and
- circumferential knurling, in the form of a plurality of teeth comprising circumferentially alternating spaced crests and roots, said teeth being on the outer surface of said frustoconical point and extending from that portion of the outer surface of said frustoconical portion furthest from the circular edge, towards, but not extending to, said circular edge.
3 more elements
Dependencies are inferred from the claim text.