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AssigneeEaton Corporation
InventorsChristian Dragoni, Emmanuel Hermet, Michel Hernandez, Francois Rosaz
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The invention concerns an electrovalve proportional to a field current supplying the field coil (5) axially enclosing a mobile core (76), whereto is secured a push rod (16) sliding in a polar component (9) of the fixed magnetic circuit co-operating with the field coil, actuating a shutter (2, 3) comprising at least a valve (25, 26) co-operating with a seat (28, 29) to open and close the shutter, return means (32, 33) providing it with a stable neutral position relative to the seal when the field current is null, each valve being coaxial to the push rod and actuated thereby. The invention is characterized in that the mechanical linkage between the stem of each valve (17, 27) and, either the stem of the adjacent valve, or the push rod, constitutes a punctual contact.
A solenoid valve that has a response proportional to an inductor current powering an inductor coil surrounding an axially moving core plunger to which there is secured a pushrod sliding in a pole piece of the fixed magnetic circuit and collaborating with the inductor coil, actuating a valve comprising a plurality of valve shutters each collaborating with a seat disposed in a valve body so as to open and close the valve, return means providing each shutter with a stable position of rest with respect to the seat when the inductor current is zero, each valve shutter being coaxial with the pushrod and actuated by it, characterized in that the mechanical connection between the shaft of one valve shutter and the pushrod and respectively the shaft of the adjacent valve shutter is reduced to a point contact wherein the plurality of shutters move together in one direction to close the valve and move together in an opposite direction to open the valve.
Dependencies are inferred from the claim text.