Fluid handling – With leakage or drip collecting
Patent
1986-05-05
1987-09-22
Walton, George L.
Fluid handling
With leakage or drip collecting
13762523, 13762524, 91375A, 91375R, 251283, 251309, F16K 11083, F15B 908
Patent
active
046948490
ABSTRACT:
A hydraulic valve has a tapered plug rotatable in a complementary tapered bore in a stationary housing so that the axial position of the plug controls the magnitude of a leakage path between the two parts. The magnitude of the leakage path is sensed and used to control the axial position of the plug in a negative feedback arrangement so that the valve plug floats on a film of escaping hydraulic fluid and can be readily rotated by a low power actuator. Ports in the stationary member and passages in the plug are arranged so that both static and preferably also dynamic and hydraulic forces acting on the plugs are balanced. The valve is contained in a closed housing, preferably together with the actuator.
REFERENCES:
patent: 2079774 (1937-05-01), Shipley
patent: 3110322 (1963-11-01), Bozoyan
patent: 3296939 (1967-01-01), Eddy
patent: 3296940 (1967-01-01), Eddy et al.
patent: 3404704 (1968-10-01), Adams
patent: 4272056 (1981-06-01), Komamura et al.
patent: 4335745 (1982-06-01), Bouveret et al.
patent: 4387737 (1983-06-01), Tobiasz
patent: 4428399 (1984-01-01), Masuda et al.
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