Rotary fluid coupling

Details Rotary fluid coupling Rotary fluid coupling

1980-03-31

1983-08-02

Arola, Dave W.

Pipe joints or couplings

With lubrication

285 98, 285100, 285108, 285190, F16L 1700

Patent

active

043962122

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 an annular piston which surrounds the shaft and which forms a wall of a chamber connecting a duct in the shaft to a duct in the wall of the hub. A seal is disposed around the shaft between the piston and a closed end of a bore in the hub. In the bore between the piston and the seal is a lubricating material such that pressure exerted on the piston by fluid in the aforesaid chamber will be transmitted by the lubricating material to the seal, preferably a labyrinth seal.

REFERENCES:
patent: 945180 (1910-01-01), Ljungstrom
patent: 2245281 (1941-06-01), Klopak
patent: 2270927 (1942-01-01), Browne
patent: 2349696 (1944-05-01), Behrens
patent: 2558990 (1951-07-01), Stahl et al.
patent: 2877026 (1959-03-01), Payne et al.
patent: 2937029 (1960-05-01), Colby
patent: 2985468 (1961-05-01), Shaw et al.
patent: 3694008 (1972-09-01), Slator

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