Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Frangible member
Patent
1997-11-12
1998-08-11
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Frangible member
411 61, 411182, 411908, F16B 1304, F16B 3704
Patent
active
057918457
ABSTRACT:
A device for anchoring a threaded fastener in a drywall or blind hole is molded in one flat piece having two half cylinders joined by a thin frangible hinge. Each half-cylinder carries half of a threaded bore divided axially. When folded together the two half-cylinders form a cylindrical headed anchor with a continuously threaded passage extended part way to the hinge. A threaded fastener advances readily down the bore until the unthreaded portion is reached. The fastener, as it advances in that portion, forces the halves apart, rupturing the hinge and anchoring the device.
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Blum Alvin S.
Wilson Neill R.
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