Internal-pressure-bearing female screw

Details Internal-pressure-bearing female screw Internal-pressure-bearing female screw

1988-06-09

1990-09-25

Wilson, Neill R.

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

Externally threaded fastener element, e.g., bolt, screw, etc.

Thread or shank structure

411436, 285333, 220 3, F16B 3504, F16L 2500

Patent

active

049589733

ABSTRACT:
An internal-pressure-bearing female screw adapted to be applied with a varying composite load due to variation of an internal pressure, in which the thread contact heights of the female screw are formed so as to be successively lowered along the direction of an applied tensile load, whereby the bending moments per unit length at the bottom of valleys of the respective female screw threads are equalized to reduce the maximum bending moment and the bending moment amplitude.

REFERENCES:
patent: 2641488 (1953-06-01), Dunn et al.
patent: 2772102 (1956-11-01), Webb
patent: 3083043 (1963-03-01), Thornhill
patent: 3210096 (1965-10-01), Van Der Wissel
patent: 3266363 (1966-08-01), Bronson et al.
patent: 3664540 (1972-05-01), Witkin
patent: 4189975 (1980-02-01), Nisida et al.
patent: 4549754 (1985-10-01), Saunders et al.

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