Fluid handling – Systems – Sequentially closing and opening alternately seating flow...
Patent
1985-08-14
1986-04-01
Michalsky, Gerald A.
Fluid handling
Systems
Sequentially closing and opening alternately seating flow...
13759617, F15B 13044
Patent
active
045791465
ABSTRACT:
A three-port solenoid-operated valve has a fluid passage defined in a solenoid, a first port at an inlet end of the fluid passage, and second and third ports at an outlet end of the fluid passage. A cylindrical plunger is movably disposed in the fluid passage, and a slider is slidably supported in the plunger. A first-port valve body is normally urged by a first spring to be held against an end surface of the slider for opening the first port when the solenoid is de-energized. A third-port valve body is normally urged by a second spring for closing the third port when the solenoid is de-energized and is energized by a lower current. A pusher is fixedly mounted in the plunger for pushing the third-port valve body in a direction to open the third port in response to movement of the plunger when the solenoid is energized by a higher current. A third spring acts between the pusher and the opposite end surface of the slider for normally urging the pusher and the slider apart from each other. The second spring has a smallest spring force, the third spring has a largest spring force, and the first spring has an intermediate spring force between the spring forces of the second and third springs.
REFERENCES:
patent: 3921666 (1975-11-01), Leiber
patent: 3970111 (1976-07-01), Brune et al.
patent: 3989063 (1976-11-01), Brouwers et al.
patent: 4526203 (1985-07-01), Leiber
patent: 4534382 (1985-08-01), Tanguy
Nakanishi Nobuyasu
Nomura Yoshihisa
Tsuru Naohiko
Michalsky Gerald A.
Nippondenso Co. Ltd.
Toyota Jidosha & Kabushiki Kaisha
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