Drive-in expansion fastener

Details Drive-in expansion fastener Drive-in expansion fastener

1980-08-18

1982-10-19

Britts, Ramon S.

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

Having separate expander means

Including sleeve and distinct tapered expander

411 74, 411479, F16B 1306, F16B 1506

Patent

active

043547826

ABSTRACT:
An expansion fastener, especially for walls formed of plaster or drywall, in which a metallic sleeve-like member having spreadable sides is provided with a point at one end and an outwardly extending flange at the other. The fastener can be driven into the wall until the flange engages the outer surface of the wall. The pointed end portion of the fastener is circular in cross-section and truncated. Teeth are spaced longitudinally and extend outwardly but within an imaginary cylinder extended from the pointed end portion. A screw threaded into the member spreads the sides thereof and the teeth outwardly forcing them into the side of a hole formed in the wall when the fastener is driven thereinto.

REFERENCES:
patent: 1095366 (1914-05-01), Abbott
patent: 2582580 (1952-01-01), Bedford, Jr.
patent: 2596952 (1952-05-01), Crowther
patent: 3895732 (1975-07-01), Robinson et al.
patent: 4203193 (1980-05-01), Arthur

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