Screw coupling joint

Details Screw coupling joint Screw coupling joint

1988-04-21

1991-01-15

Arola, Dave W.

Pipe joints or couplings

Particular interface

Tapered

2853344, 285351, 285369, 285383, F16L 2500

Patent

active

049848291

ABSTRACT:
A screw coupling joint having a sealing portion between an outer circumference formed in convex in an axial direction of the coupling joint at the end of the male screw portion and an inner circumference formed in taper at an inner part of the female screw portion. The female screw portion has a stopper end positioned to be contacted, when the coupling joint is assembled, by the inner end of the male screw portion. The taper is between 1.degree. and 3.degree. and the inner diameter D.sub.1 of the female screw and the outer diameter D.sub.2 of the male screw have the relationship D.sub.2 >D.sub.1 at a tangent point therebetween. The end of the male screw portion and the end of the stopper are vertical or perpendicular to the axis of the coupling joint.

REFERENCES:
patent: 1218359 (1917-03-01), Beatty
patent: 1932427 (1933-10-01), Stone
patent: 2532632 (1950-12-01), MacArthur
patent: 2992019 (1961-07-01), MacArthur
patent: 3870351 (1975-03-01), Matsuki
patent: 4085951 (1978-04-01), Morris
patent: 4153283 (1979-05-01), Hellmund et al.
patent: 4384737 (1983-05-01), Reusser

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