Valves and valve actuation – Electrically actuated valve – Including solenoid
Patent
1989-08-30
1990-09-04
Rosenthal, Arnold
Valves and valve actuation
Electrically actuated valve
Including solenoid
25112915, 25112907, F16K 3106
Patent
active
049538250
ABSTRACT:
An electromagnetic proportional flow control valve includes an electromagnetic solenoid having a bobbin with an axial bore and a fixed core in the axial bore. A valve housing defines a first port, a second port and a valve seat fludically positioned between the first and second ports, while a valve is normally in a closing position for closing the valve seat and interrupting fluid communication between the first and second ports. A movable core is fixed to the valve and positioned relative to the electromagnetic solenoid such that the movable core is attracted to the fixed core upon excitation of the electromagnetic solenoid. As a result, the valve may move from the closing position upon excitation of the electromagnetic solenoid to fluidically communicate the first and second ports. An annular diaphragm is positioned between the valve and the electromagnetic solenoid and is sealingly mounted to the movable core so as to form a fluid tight pressure chamber on a side of the diaphragm opposite the valve. A passage in the movable core fluidically communicates the pressure chamber with the second port so that forces acting on the valve due to pressure differences across the valve are cancelled.
REFERENCES:
patent: 3627257 (1971-12-01), Stampfli
patent: 4830332 (1989-05-01), Miura et al.
patent: 4858886 (1989-08-01), Tatara
Hashimoto Kenji
Ito Shoji
Osumi Toru
Aisin Seiki Kabushiki Kaisha
Rosenthal Arnold
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