Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1982-06-15
1986-07-08
Nilson, Robert G.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
123571, 137 85, 13759617, 1376275, 137907, G05D 1606
Patent
active
045987297
ABSTRACT:
A negative pressure control valve for generating a negative pressure has an inlet port communicating with a negative pressure source, an outlet port communicating with a negative pressure load, a diaphragm chamber with one surface defined by a diaphragm, and an atmospheric pressure chamber adjacent to the diaphragm chamber through the diaphragm and communicating with atmospheric pressure. The diaphragm holds a valve holding member. A solenoid operated mechanism which moves the valve holding member to a first or second position in accordance with an exciting current is disposed in the atmospheric pressure chamber. The valve holding member has a valve mechanism which communicates the diaphragm chamber with the atmospheric pressure chamber at the first position and seals a channel between those chambers at the second position. The solenoid operated mechanism selectively communicates the diaphragm chamber with the atmospheric pressure chamber.
REFERENCES:
patent: 3071147 (1963-01-01), Dudzinski
patent: 3545472 (1970-12-01), Franz
patent: 3590849 (1971-07-01), Austin
patent: 3921666 (1975-11-01), Leiber
patent: 4079753 (1978-03-01), Popp
patent: 4120214 (1978-10-01), Toda
patent: 4166476 (1979-09-01), Yamanaka
Itou Kazuo
Kawagoe Michio
Naito Mitikatu
Tanaka Masaaki
Tsuzuki Kunihiro
Nilson Robert G.
Nippondenso Co. Ltd.
Toyota Jidosha Kogyo Kabushiki Kaisha
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