Pressure actuated pipe swivel joint

Details Pressure actuated pipe swivel joint Pressure actuated pipe swivel joint

1997-05-29

1999-11-30

Arola, Dave W.

Pipe joints or couplings

With strain relief

285226, 92 34, 92 43, 137 12, 138121, F16L 3500

Patent

active

059929006

ABSTRACT:
A packless swivel joint capable of rotation without the necessity for a mechanical drive includes a hollow tubular member provided with helical corrugations of tight pitch and a corrugation pitch to corrugation with ratio of between two to one to three to one which unwinds to the application of only internal pressure. A limit stop may be provided to limit the amount of unwinding. Annular-shaped bellows of a circular cross section can be utilized to absorb lengthening of the swivel joint in applications where lengthening is to be prevented. In one preferred embodiment, the helical corrugation is preferably continuous.

REFERENCES:
patent: 2563899 (1951-08-01), Wiancko
patent: 2857175 (1958-10-01), Browning et al.
patent: 2867242 (1959-01-01), Harris et al.
patent: 3082795 (1963-03-01), Heller
patent: 3096104 (1963-07-01), Browning
patent: 3318335 (1967-05-01), Heller
patent: 3463011 (1969-08-01), Wehde et al.
patent: 4108050 (1978-08-01), Paynter
patent: 4243253 (1981-01-01), Rogers
patent: 5033270 (1991-07-01), Hardt

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