Modified locking thread form for fastener

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having structure to restrict rotation of threaded – mating... – Comprising a thread lock

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Details

411366, 411411, F16B 3504, F16B 3930

Patent

active

057384720

ABSTRACT:
A threaded fastener has a standard part with a standard thread form characterized by thread walls with a standard included angle, and a modified part complementary to the standard part having a modified thread form characterized by thread walls which are symmetrically inclined with a modified included angle that is different from the standard included angle of the standard part's thread walls, such that the threads of one part make pre-loaded edge contact with the thread walls of the other part. The thread form of the modified part can have an included angle that is greater, less, or compound as compared to the included angle of the standard part. The standard part may be a bolt and the modified part a nut, or vice versa. The modified thread form holds securely even under large vibrational forces, it permits bi-directional use of standard mating threads, is impervious to the build up of tolerances and can be manufactured with a wider range of tolerances without loss of functionality, and distributes loading stresses (per thread) in a manner that decreases the possibility of single thread failure.

REFERENCES:
patent: 271852 (1883-02-01), Hull
patent: 1016897 (1912-02-01), Ryan
patent: 1451484 (1923-04-01), Woodward
patent: 3133578 (1964-05-01), Moskovitz
patent: 3426820 (1969-02-01), Phipard, Jr.

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