Wall fastener

Details Wall fastener Wall fastener

1987-01-09

1988-08-23

Gall, Lloyd A.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Including sleeve and distinct tapered expander

F16B 1304

Patent

active

047657880

ABSTRACT:
An improved wall fastener for hollow walls, the fastener having two spreadable anchoring blades designed to spread behind the wall following insertion of a screw thereinbetween. The fastener is made of thin sheet metal which has been hardened through a heat treating process, such as quenching. Complementary engaging means on the blades are used to hold the blades together during the heat treatment and to prevent the separation thereof until the screw insertion.

REFERENCES:
patent: 1435434 (1922-11-01), Voelker
patent: 2133916 (1938-10-01), Churchill
patent: 2191028 (1940-02-01), Miller et al.
patent: 2620537 (1952-12-01), Gobin-Daude
patent: 3148579 (1964-09-01), Giovannetti
patent: 3522756 (1970-08-01), von Wolff
patent: 3550499 (1970-12-01), Ellenberger
patent: 4088054 (1978-05-01), Lippacher et al.
patent: 4203193 (1980-05-01), Arthur
patent: 4322194 (1982-03-01), Einhorn
patent: 4500238 (1985-02-01), Vassiliou

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