Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Head driving structure
Patent
1993-09-16
1995-03-28
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Head driving structure
411910, 411919, F16B 2300, F16B 3506
Patent
active
054011337
ABSTRACT:
Panels of a security paneling system are secured to a support member with a plurality of security fastening assemblies consisting of a security fastener and a security washer. The security fastener includes a shank connected to a slotless head including a peripheral edge portion having a special shape. The security fastener is rotatable for installation and removal with a special driving tool including a driver head which has a cavity with an internal shape corresponding to the shape of the peripheral edge portion of the security fastener head and is adapted to fit over and drivingly engage the peripheral edge portion. The security washer includes a central aperture through which the shank of the security fastener extends and a recess concentric with the aperture for receiving the head of the security fastener. The recess has a bottom wall on which the head of the security fastener rests, a depth at least about as deep as the height of the peripheral edge portion of the security fastener, and a minimum inside dimension approximating but slightly greater than the maximum outside dimension of the tool driver head to permit the cavity of the tool to fit over the head and drivingly engage the peripheral edge portion, thereby minimizing access to the head of the security fastener with a tool other than the special driving tool.
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Avdel Technical Data; AVSAFE; Slotless, Tamper Resistant Screws; Series FP/FR/FG.
SpecData; Item No. 3; Alcan Building Products; May 1990.
Design Sales Associates; 3/1.02 Section at Panel Joint; Item No. 1.
Environmental Interiors Inc.; Celline Security Acoustical Ceiling System; Working Drawings For Optional Concealed Fastening System; Item No. 5.
Environmental Interiors Inc.; Celline Security Acoustical Ceiling System; Working Drawings and Specifications; Item No. 4.
Wildeck, Inc.
Wilson Neill R.
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