Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Member or portion thereof located between substructure and...
Patent
1979-04-12
1981-03-24
Britts, Ramon S.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Member or portion thereof located between substructure and...
411163, 411544, 411908, F16B 3924
Patent
active
042574650
ABSTRACT:
An improved lock washer is described for locking nuts or bolts into their fastened positions. A molded plastic washer has a series of integral dimples or lock projections extending radially outwardly and downwardly from one of the washer contact surfaces. These integral projections are turned circumferentially during the tightening of the nut or bolt and the circumferential positioning of the dimples resists an unscrewing movement of the nuts or bolts.
REFERENCES:
patent: 3212387 (1965-10-01), Madansky
patent: 3519279 (1970-07-01), Wagner
patent: 3572414 (1971-03-01), Onufer
Britts Ramon S.
Wilkie, Jr. Alexander C.
Winfred M. Berg, Inc.
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