Method and system maintaining tightness between parts rotating i

Details Method and system maintaining tightness between parts rotating i Method and system maintaining tightness between parts rotating i

1989-05-15

1991-08-27

Arola, Dave W.

Pipe joints or couplings

With fluid pressure seal

Swivel with flange in socket

285 96, 285100, 285281, 285351, 285 93, 285144, 277 27, 277 28, F16L 2700

Patent

active

050428462

ABSTRACT:
A system for maintaining a tightness between two parts rotatable relative to each other. The system includes at least two sealing units, with each of the sealing units having at least two possible states or conditions, namely, a first state or condition for ensuring a tightness between the two parts and a second state or condition wherein it does not ensure a tightness. Each sealing unit is deformable and includes a drive arrangement for intermittently actuating each of the sealing units.

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patent: 4255946 (1981-03-01), Hansen
patent: 4728125 (1988-03-01), Reneau
patent: 4761023 (1988-08-01), Troxell, Jr.
patent: 4887846 (1989-12-01), Chin et al.

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