Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Thread or shank structure
Patent
1998-05-29
1999-02-09
Wilson, Neill
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Thread or shank structure
411437, 411510, 411553, F16B 2100, F16B 3504
Patent
active
058685375
ABSTRACT:
The retainer pin includes a plurality of longitudinal rows of radially extending wings about a circumference of a shank. The radially extending wings within any one row are longitudinally offset from longitudinally adjacent wings by a pitch. The wings of circumferentially adjacent rows are offset by a distance equal to one half of the pitch thereby forming a double helix. The double helix configuration of the radially extending wings creates a screw-like configuration which is used to engage a partially threaded aperture.
REFERENCES:
patent: 2730154 (1956-01-01), Aspey
patent: 4430035 (1984-02-01), Rodseth
patent: 4728238 (1988-03-01), Chisholm et al.
patent: 4900210 (1990-02-01), Buchanan et al.
patent: 5306098 (1994-04-01), Lewis
Dorn Paul J.
Latal James F.
Illinois Tool Works Inc.
Wilson Neill
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