Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Multipart
Patent
1988-02-08
1989-03-07
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Multipart
335305, 252 6254, 411908, F16B 3502, H01F 702
Patent
active
048101486
ABSTRACT:
A drain bolt wherein a recess is formed at the end of a male-threaded portion of a bolt body, and a sinker portion of a synthetic resin magnet is embedded in the recess of the bolt body so that a projecting portion of the magnet is projected from the end of the male-threaded portion of the bolt body. The projecting portion of the synthetic resin magnet is larger in diameter than the sinker portion. A plurality of grooves are formed on the side of the projecting portion of the synthetic resin magnet along its length.
REFERENCES:
patent: 1281842 (1918-10-01), Rosnick et al.
patent: 2242830 (1941-05-01), Lisle
patent: 2755932 (1956-07-01), Cohn
patent: 2870384 (1959-01-01), Brooks
patent: 3126617 (1964-03-01), Blume
patent: 3867299 (1975-02-01), Rohatgi
patent: 4549157 (1985-10-01), Loubier
Aisa Junzo
Kosugi Eizi
Ishikawa Tekko Kabushiki Kaisha
Kirby Thomas F.
Nilles James E.
Wilson Neill R.
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