Screw-type fastening device

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Thread or shank structure

Patent

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Details

411436, 411366, F16B 3302

Patent

active

048101494

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 a continuous helical root and crest disposed therein wherein the root and crest include V-shaped crests and V-shaped roots at an angle of 45.degree., respectively, external and internal chevron-shaped slots at angles of 90.degree., respectively, and three pairs of parallel load flanks, respectively, for easily releasing the threaded elements without abrasion and protecting them from self-lossensing from each other.

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patent: 4600224 (1986-07-01), Blose
patent: 4600225 (1986-07-01), Blose
patent: 4652194 (1987-03-01), Tajima et al.

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