Self-locking screw threads

Details Self-locking screw threads Self-locking screw threads

1976-04-15

1978-01-31

Britts, Ramon S.

Brushing, scrubbing, and general cleaning

10 10R, F16B 3930

Patent

active

040710670

ABSTRACT:
A screw threaded member having a thread with at least two portions of different form, one portion being of standard form and the other portion, a locking portion, having its root and crest offset from the standard lead, the offset of the crest being in the same direction as and greater than the offset of the root, the flanks of the locking thread being correspondingly displaced and the flank on the side of the thread which is displaced away from the standard pitch line being bulged outwardly. The root offset may be between one third and two thirds of the offset of the crest. The offsets may be in either direction but are preferably in that direction which moves the lead flank away from the standard pitch line.

REFERENCES:
patent: 2371365 (1945-03-01), Tomalis et al.
patent: 3444916 (1969-05-01), Thurston
patent: 3459250 (1969-08-01), Tabor
patent: 3481380 (1969-12-01), Breed
patent: 3523565 (1970-08-01), Olsen
patent: 3661194 (1972-05-01), MacFarlane et al.
patent: 3885613 (1975-05-01), Evans

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