Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Including a series of elements – one element restricting two...
Patent
1984-03-30
1986-09-23
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Including a series of elements, one element restricting two...
411120, 411372, 411402, F16B 3902
Patent
active
046132651
ABSTRACT:
A screw-type fastener having a threaded shank and a head integral therewith, and adapted to be driven into a structure by axial rotation about its longitudinal central axis in a driving direction such that the head is countersunk, is improved by forming the head with at least two ribs protruding from the surface thereof and extending radially outward from the central axis. The ribs define a corresponding number of sector-shaped cavities adapted to receive a filler material for engaging the ribs so as to prevent the fastener from axially rotating in a direction opposite the driving direction and to thereby secure the fastener against loosening.
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Smith Gary L.
Whitcomb, Jr. Adrian H.
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