Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Headed bolt or screw with threads and complementary nut
Patent
1988-04-26
1989-07-25
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Headed bolt or screw with threads and complementary nut
411411, 411938, F16B 3504
Patent
active
048507750
ABSTRACT:
A screw-type fastening device including a male threaded element such as a bolt and a female threaded element such as a nut in which each element contains continuous helical root and crest disposed therein wherein the root and crest include cone-shaped crests and cone-shaped roots at an angle of about 45.degree. to 90.degree., respectively, external and internal chevron-shaped slots at angles of about 135.degree. to 225.degree., respectively, and three pairs of parallel load flanks, respectively, for easily releasing the threaded elements without abrasion and protecting them from self-loosening from each other.
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Choe Kum C.
Lee Jae B.
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