Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1981-10-08
1984-02-14
Cohan, Alan
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137486, 1374875, F16K 31363
Patent
active
044310200
ABSTRACT:
The invention contemplates a system of relatively wide-range solenoid control of pressure-fluid flow from a high-pressure upstream source to a downstream load. In a first range of relatively low rates of flow, the system utilizes the solenoid to actuate a pilot valve for controlled exclusive delivery of pressure fluid to the load, via a throttling orifice; in a second range of higher rates of flow, the pressure drop across the throttling orifice becomes sufficiently great to enable pilot-delivery pressure, upstream from the throttling orifice, to open a main-valve line from the source to the load. The arrangement is such that solenoid-actuating force variation within the first range produces a first characteristic of flow-rate delivery to the load, and is also such that solenoid-actuating force variation beyond the first range produces a second and steeper characteristic of flow-rate delivery to the load.
REFERENCES:
patent: 3135281 (1964-06-01), Morgan
patent: 3213875 (1965-10-01), Spence
Cohan Alan
Marotta Scientific Controls, Inc.
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