Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1987-04-20
1988-09-06
Schwadron, Martin P.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137501, 137503, G05D 701, F16K 1730
Patent
active
047685409
ABSTRACT:
A flow control valve comprising a housing formed with an intake passage, a drain passage and a discharge passage; a main spool and an auxiliary spool which are slideably housed within the housing; a first orifice disposed between the intake passage and the discharge passage; a second orifice disposed between the intake passage and the discharge passage and having an open area variable in response to displacement of the auxiliary spool; a drain orifice disposed between the first orifice and the drain passage and having an open area variable in response to displacement of the main spool; the main spool being movable in response to a first differential pressure; the auxiliary spool being movable in response to a second differential pressure; and a control ring secured within the housing and adapted to vary the open area of the first orifice in response to displacement of the auxiliary spool movable in response to the second differential pressure.
REFERENCES:
patent: 2214250 (1940-09-01), Landrum
patent: 2865397 (1958-12-01), Cherault
patent: 4361166 (1982-11-01), Honaga et al.
patent: 4549566 (1985-10-01), Fujiwara et al.
Mochizuki Teruhiko
Tanaka Atsushi
Atsugi Motor Parts Company Limited
Hepperle Stephen M.
Schwadron Martin P.
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