Wall anchor with self-drilling capability

Details Wall anchor with self-drilling capability Wall anchor with self-drilling capability

1979-09-12

1982-03-30

Britts, Ramon S.

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

Having separate expander means

With hole forming means

411 57, 411 71, F16B 1306

Patent

active

043221947

ABSTRACT:
A unitary hollow plastic screw anchor which is capable of being hammered or otherwise driven into a hollow wall, with a weakened separation plane adjacent the entrance portion which is sufficiently strong to hold together during installation in the wall, and sufficiently weak to split apart when a screw is inserted into the installed anchor. Features of the anchor include a generally cross-shaped entrance end for minimal penetration resistance, a generally rectangular interior with arcuate screw centering grooves, a single turn helix adjacent the wall-engaging flange thereof to start the screw, an internal step configuration to accommodate screws of varying diameter, and two longitudinal slots which compress during installation to further reduce penetration resistance.

REFERENCES:
patent: 2412517 (1946-12-01), Klein
patent: 3280875 (1966-10-01), Fischer
patent: 3431813 (1969-03-01), Johnson
patent: 3613497 (1971-10-01), Heldermann
patent: 3703120 (1972-11-01), Van Buren, Jr.
patent: 4085651 (1978-04-01), Koscik

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