Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1985-05-20
1986-11-04
Cohan, Alan
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
G05D 1600
Patent
active
046205616
ABSTRACT:
This invention is directed to a differential control valve. The differential pressure is maintained by differing area surfaces on a piston assembly which will be balanced at a predetermined differential established at the manufacturing operation. There is a spring member operating on two valve balls which provides a delayed pressurization of the controlled chamber. The control valve has a ball valve at the exit port to control the low pressure side of the differential control valve assembly, providing a fail-safe system with no adjustments required after manufacture if there is a pressure increase downstream.
REFERENCES:
patent: 3021858 (1962-02-01), Kirk
Bandag Licensing Corporation
Cohan Alan
Hill Frank B.
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