Fluid swivel assembly

Details Fluid swivel assembly Fluid swivel assembly

1988-07-21

1990-05-15

Nicholson, Eric K.

Pipe joints or couplings

With fluid pressure seal

285351, 285 98, 285281, 277 24, 277206R, F16L 1702

Patent

active

049252194

ABSTRACT:
A fluid swivel is described, of a type which forms an annular chamber and a pair of gap passages extending in opposite directions from the chamber to the environment, with face seals along each gap passage. The fluid swivel uses a minimum number of parts and minimizes entrapment of sediment in the isolation seal lying between the chamber and the closest pressure seal. The high pressure ends of the primary and secondary seals in each gap passage, face in opposite radial directions, and the low pressure end of each secondary seal lies about as far from the axis of rotation of the swivel as the low pressure end of the corresponding primary seal. The gap passage includes a tapered portion leading from the annular chamber to the isolation seal, to enable circulation of fluid up to the isolation seal to minimize the buildup of sediment.

REFERENCES:
patent: 4561679 (1985-12-01), Choate
patent: 4647076 (1987-03-01), Pollack et al.
patent: 4647077 (1987-03-01), Ethridge et al.
patent: 4662657 (1987-05-01), Harvey et al.
patent: 4669758 (1987-06-01), Feller et al.
patent: 4756559 (1988-07-01), Shimada et al.
patent: 4781404 (1988-11-01), Tharp et al.
patent: 4819966 (1989-04-01), Gibb
patent: 4828292 (1989-05-01), Jansen

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