Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Securing means pivotable about axis transverse to fastener...
Patent
1985-10-02
1987-05-05
Ridgill, Jr., James L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Securing means pivotable about axis transverse to fastener...
411394, F16B 1304
Patent
active
046628088
ABSTRACT:
A wall anchor having a socket and a drive pin. A passage within the socket receives the drive pin. Fingers on the leading end of the socket have walls in the path of the pin. The fingers pivot into contact with the back surface of the wall by a cam action of the drive pin against the fingers and slightly spaced from a web in front of the fingers. Ribs on the inner wall of the passage grip the drive pin in a ready position. A head on the socket and barbs on the outer wall hold the socket in another part. The fingers have generally flat faces that are barbed to make maximum contact with the wall surface. The drive pin has a shank at its lead portion and helical threads at its trailing portion with a head on the trailing end. The drive pin can be driven by a hammer through the socket and can be withdrawn by the use of a screwdriver.
REFERENCES:
patent: 2033100 (1936-03-01), Kellogg
patent: 2555420 (1951-06-01), Richardson
patent: 3188905 (1965-06-01), Millet
patent: 3213745 (1965-10-01), Dwyer
patent: 3431813 (1969-03-01), Johnson
patent: 4022100 (1977-05-01), Johnson
patent: 4274324 (1981-06-01), Giannuzzi
Lee-Rowan Company
Ridgill, Jr. James L.
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