Pipe joints or couplings – Liquid seal – With relative motion
Patent
1980-12-18
1984-05-22
Arola, Dave W.
Pipe joints or couplings
Liquid seal
With relative motion
285 94, 285 98, 285190, 285281, F16L 1700
Patent
active
044497385
ABSTRACT:
A rotary fluid coupling for conveying fluid from a stationary shaft to a hub rotatably mounted on the shaft, or vice versa. The coupling is characterized in having a shaft provided with an axial passageway extending therethrough, one end of the passageway being connected to a source of high pressure fluid and the other being connected to a source of high-viscosity sealing fluid (e.g., a lubricant). A piston in the passageway separates the high-viscosity sealing fluid from the high pressure fluid, the latter being conveyed to the surrounding hub through radial passageways formed in an enlarged diameter portion of the shaft. The high-viscosity sealing fluid is applied to both ends of the enlarged diameter portion of the shaft to form a seal which prevents escape of the high pressure fluid.
REFERENCES:
patent: 2210088 (1940-08-01), Longfield
patent: 2270927 (1942-01-01), Braune
patent: 3479061 (1969-11-01), Smookley et al.
patent: 3746372 (1973-07-01), Hynes et al.
Arola Dave W.
Gebr. Eickhoff Maschinenfabrik und Eisengiesserei m.b.H.
Murray Thomas H.
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