Arrangement for actuating mechanically independent valves in a p

Details Arrangement for actuating mechanically independent valves in a p Arrangement for actuating mechanically independent valves in a p

1974-12-12

1976-08-10

Cohan, Alan

Fluid handling

Systems

Valves with separate, correlated, actuators

91449, 91454, 91461, 13759615, 13759616, F15B 13043, F15B 2000

Patent

active

039735958

ABSTRACT:
A hydraulic interlock arrangement for ensuring that an inlet valve is closed before a discharge valve is opened, and vice versa, each inlet or discharge valve having a hydraulic piston-cylinder unit for actuating the same, a hydraulic pilot valve for operating the piston-cylinder unit and a blocking member for preventing actuation of the pilot valve, the first blocking member being connected to the pressure chamber of the second piston-cylinder unit, and vice versa, so that when the pressure chamber in one piston-cylinder unit is under pressure, the pilot valve of the other piston-cylinder unit cannot be actuated.

REFERENCES:
patent: 2471320 (1949-05-01), Gilson
patent: 2994303 (1961-08-01), Robra et al.
patent: 3289701 (1966-12-01), Booth et al.
patent: 3856037 (1974-12-01), Garrett

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