Device for positively locking a screw in a tapped hole

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...

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Details

403 19, 411263, 411293, 411312, 411321, F16B 3902

Patent

active

042521670

ABSTRACT:
The device comprises in combination a screwthreaded block and a screw which are hollow and have screwthreads of opposite direction. These screwthreads cooperate with screwthreads of respectively corresponding direction formed in the inner wall of the tapped hole. There are provided means for stopping the block, and means for preventing rotation between the block and the screw.

REFERENCES:
patent: 501345 (1893-07-01), Holmes
patent: 965445 (1910-07-01), Davis
patent: 1413024 (1922-04-01), Harrell
patent: 2147899 (1939-02-01), Hoern
patent: 3104493 (1963-09-01), Nalle
patent: 3630261 (1971-12-01), Gley

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