Fluidtight pipe joint

Details Fluidtight pipe joint Fluidtight pipe joint

1983-02-24

1985-02-26

Arola, Dave W.

Pipe joints or couplings

Particular interface

285334, F16L 3500

Patent

active

045014434

ABSTRACT:
Two metallic pipes to be sealingly interfitted are respectively provided with a plug-shaped male extremity and a socket-shaped female extremity having mating frustoconical peripheral threads and adjoining unthreaded annular peripheral formations closely contacting each other upon assembly. An annular end face of the male extremity and a confronting annular shoulder of the female extremity, lying in planes transverse to the pipe axis, have spiral tracks of trapezoidal profile engaging each other with close positive fit in the fully assembled position, the pitch of these tracks being such as to counter a radial compression of that end face by the interacting unthreaded peripheral formations.

REFERENCES:
patent: 1935673 (1933-11-01), Smith et al.
patent: 2050137 (1936-08-01), Walsh
patent: 2258066 (1941-10-01), Oyen
patent: 3856337 (1974-12-01), Ehm et al.
patent: 3870351 (1975-03-01), Matsuki

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