Power-assisted valve

Pumps – Correlated pump and motor or clutch control – Pump distributor control

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Details

13753311, 137872, 251 82, 417399, 417507, 417539, 417900, F04B 2102

Patent

active

043392334

ABSTRACT:
A power-assisted valve is provided which is particularly effective for systems handling viscous materials, such as certain metering systems. The check valve operates effectively even with highly-filled viscous resins used in such systems. The valve includes a valve seat and a valve ball which can be urged toward the valve seat to a closed position by a fluid-powered cylinder and piston. The piston rod is separate from the valve ball so that the ball can rotate relative to the valve seat.

REFERENCES:
patent: 862867 (1907-08-01), Eggleston
patent: 2843050 (1958-07-01), Harper
patent: 3386388 (1968-06-01), Rosenberg
patent: 4030860 (1977-06-01), Standlick
patent: 4118799 (1978-10-01), Krueger
patent: 4171191 (1979-10-01), Krueger

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