Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Metallic resilient securing means
Patent
1997-03-05
1999-02-02
Green, Brian K.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Metallic resilient securing means
411352, 411970, 411999, F16B 2118
Patent
active
058655824
ABSTRACT:
A one-directional captive screw attachable to a panel that is hand tightenable, but requires a tool to loosen once hand tightened. The captive screw includes a screw having a head with a recess and a threaded portion, a knob having a central longitudinal axis coaxial with the screw, a one-directional ratchet between the knob and the screw. The ratchet engages to allow the screw to be tightened in a clockwise direction using the knob, and disengages when rotated in a counterclockwise direction, such that a tool is required to loosen the screw by use of the recess.
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Southco Latches and Access hardware Handbook 45 NA, pp. B19-B22 & C1-C44.
Dickerson Harry L.
Ellis Thomas J.
Conley Frederick
Green Brian K.
Southco Inc.
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