Positive thread start fastener

Details Positive thread start fastener Positive thread start fastener

1993-05-20

1994-06-14

Lindsey, Rodney M.

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

Externally threaded fastener element, e.g., bolt, screw, etc.

Pilot end having means enhancing fastening or installation

411366, 411411, F16B 2500

Patent

active

053204670

ABSTRACT:
A fastener includes an annular body having a screw thread spiraling therearound. The thread has a crest and a pair of front and back flanks extending laterally therefrom, with a start end disposed adjacent to a front end of the body. The start end is flat from the back flank to the front flank and is inclined at an acute back angle relative to a helical axis of the crest for facing the start end toward a back end of the body.

REFERENCES:
patent: 447775 (1891-03-01), Higbee
patent: 2152681 (1929-04-01), Caminez
patent: 2564029 (1951-08-01), Peterson
patent: 3183531 (1965-05-01), McKewan
patent: 4755092 (1988-07-01), Yaniv
patent: 4840526 (1989-06-01), Bourdonne
patent: 4952110 (1990-08-01), Avgoustis et al.
patent: 4981406 (1991-01-01), Weiss et al.
patent: 5073073 (1991-12-01), Kazino et al.

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