Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1989-06-19
1990-11-06
Chambers, A. Michael
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
251 45, 25112915, F16K 3112
Patent
active
049679961
ABSTRACT:
The pilot type controlled electromagnetic valve system in accordance with the present invention is opened and closed principally by means of automatic remote control.
The controlled valve system comprises a main valve F; a pilot valve G for opening and closing the main valve F by means of the fluid pressure on the primary side; a latching solenoid H for opening and closing the pilot valve G; and a solenoid drive control unit I for driving the solenoid H by supplying a discharge current from a capacitor to the solenoid. A pulse discharge current is supplied to the solenoid H from the capacitor C only when the pilot valve G is opened or closed, and no excitation current is supplied continuously through the coil of the solenoid. As a result, the power source battery can be reduced in size, and therefore virtually no accidents take place in the controlled valve system due to no heat generation in the coil.
REFERENCES:
patent: 3372899 (1968-03-01), McPherson
patent: 3379406 (1968-04-01), Greer
patent: 3439895 (1969-04-01), Marandi
patent: 4099701 (1978-11-01), Berger
patent: 4256133 (1981-03-01), Coward et al.
patent: 4679766 (1987-07-01), Cuming
Ideta Eiji
Nishino Koji
Sonoda Yoshiteru
Tomita Atsuo
Tsubomoto Koichi
Chambers A. Michael
Kiyohara Masako
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