Thread forms for preventing disengagement between male and femal

Details Thread forms for preventing disengagement between male and femal Thread forms for preventing disengagement between male and femal

1996-10-07

1999-03-02

Saether, Flemming

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

Having structure to restrict rotation of threaded, mating...

Comprising a thread lock

411411, F16B 3920, F16B 3504

Patent

active

058761683

ABSTRACT:
The present invention provides a male screwthread that does not loosen. In a male screwthread that has a thread ridge formed on an outer peripheral surface of an axial portion and a head portion that forms a tool mating means at one end of this axial portion, loosening and return between the male screwthread and a female screwthread is prevented (self-locking) by a configuration in which the thread ridge thereof is formed to have a major diameter that is larger than a reference value and the half-angle of the head-portion side of the thread ridge is formed to be less than 30 degrees.

REFERENCES:
patent: 3323402 (1967-06-01), Gowen
patent: 3433117 (1969-03-01), Gowen
patent: 5580199 (1996-12-01), Suzuki

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