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
1998-02-19
2000-01-18
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
411262, 411383, 411412, F16B 3712, F16B 3502
Patent
active
060152516
ABSTRACT:
A secure threaded fastener, prevented from unexpectedly coming loose, is described. The fastener or a nut or bolt has a coil spring capable of stopping the fastener when the fastener may be unexpectedly rotated in a loosening direction due to an outside force. The coil spring is received in a smooth section of the fastener with one end of the spring being fixed and the other end being movable and so the spring's diameter is changeable in accordance with a rotating direction of the fastener. When the fastener is rotated in a tightening direction, the spring allows the fastener to be smoothly tightened. However, when the fastener is unexpectedly rotated in a loosening direction, the spring prevents the fastener from unexpectedly coming loose.
REFERENCES:
patent: 900589 (1908-10-01), Ratcliffe
patent: 1267656 (1918-05-01), Goserud
patent: 1630958 (1927-05-01), Mauch
patent: 2233889 (1941-03-01), Hood
patent: 2562621 (1951-07-01), Larson
patent: 5449259 (1995-09-01), Clohessey
MacPherson Alan H.
Matsubayashi Hugh H.
Wilson Neill
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