Fluid handling – Systems – Sequentially progressive opening or closing of plural valves
Patent
1975-07-22
1977-05-31
Cohan, Alan
Fluid handling
Systems
Sequentially progressive opening or closing of plural valves
251 29, F16K 1710
Patent
active
040263274
ABSTRACT:
A rapid opening valve assembly has a housing in which there is positioned a cylinder body slidably receiving, in a cylinder chamber, a valve piston which maintains the valve assembly in an open or closed state. The valve piston has an axial extension which constitutes a spindle and which is received in a spindle chamber formed in the cylinder body. The valve piston is urged into the closed position by a spring, the force of which is opposed by the pressure in the high pressure side of the valve assembly, seeking to move the valve piston away from its seat. In the valve piston there is provided a servochamber which receives a slidable servopiston cooperating with a servovalve seat also carried by the valve piston. The servopiston is urged against its seat by a servospring, the force of which is opposed by the cylinder chamber pressure admitted to an end face of the servopiston through a channel provided in the valve piston. The servochamber communicates with the spindle chamber by a channel passing through the spindle. A conduit connects the high pressure side with the spindle chamber. An auxiliary valve which is arranged in the conduit, has a first position in which the spindle chamber is pressurized from the high pressure side and a second position in which the spindle chamber is depressurized. A rapid opening of the valve piston is effected when the auxiliary valve is switched from its first position to its second position.
REFERENCES:
patent: 558794 (1896-04-01), Ford
patent: 1357837 (1920-11-01), Bouvier
patent: 1637825 (1927-08-01), Klann
patent: 2619112 (1952-11-01), Renick
patent: 2914079 (1959-11-01), Hertrich
patent: 3036587 (1962-05-01), Silver
patent: 3825026 (1974-07-01), Salerno
patent: 3958600 (1976-05-01), Kalb
AEG-Kanis Turbinenfabrik GmbH
Cohan Alan
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