Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having structure to restrict rotation of threaded – mating... – Structure is coaxial – distinct member that restricts nut piece
Patent
1986-10-16
1988-11-15
Wilson, Neill
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having structure to restrict rotation of threaded, mating...
Structure is coaxial, distinct member that restricts nut piece
411437, 411941, F16B 39284, F16B 3716
Patent
active
047845538
ABSTRACT:
A vibration-resistant attachment device involving a threaded stud having thread crests, and a sheet metal member having an aperture the edge of which constitute an element of an interrupted female screw thread through which element the threaded stud extends. The sheet metal member has a resilient tab which is struck from it, and the tab has an anti-backoff structure providing a sharp cutting edge which engages at least one thread crest, and enables by-passing movement of the crest when the stud is turned in a screwing-on direction with respect to the sheet metal member, and which bites into the crest so as to resist subsequent movement of the stud in an unscrewing direction. The construction is especially adapted for securement of a knob to a cigar lighter ignitor plug.
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Bittman Mitchell D.
Casco Products Corporation
Wilson Neill
LandOfFree
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