Accession Number : ADD015969

Title :   Self Locking Set Screw.

Descriptive Note : Patent, Filed 3 Feb 93, patented 14 Sep 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Tucchio, Michael A

Report Date : 14 Sep 1993

Pagination or Media Count : 4

Abstract : A threaded, locking set screw with standard outer dimensions having a threaded body, an expansion plug, and a retaining wedge. The threaded body has a tapered cavity at its bottom end. The expansion plug and retaining wedge are inserted into the cavity in the body. The base of the plug extends from the cavity, and the plug is held in place by a force fit between the wedge and a retaining slot in the body. When the set screw is tightened against a part, the plug is forced into the cavity. Because of a locking taper between the plug and the cavity, the plug exerts an outward force on the inner surface of the cavity causing the set screw body to expand radially, thus, locking the set screw in place.

Descriptors :   *SCREWS, *LOCKING FASTENER DEVICES, *SCREW THREADS, *PATENTS, CAVITIES, EXPANSION, PLUGS, SLOTS, STANDARDS, TAPER, WEDGES

Subject Categories : Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE