Other

James M Enger

Kevin G Nowobilski

Ronald G Diller

A latching coil valve device is provided, comprising a body providing an inlet and an outlet; an actuatable valve unit connecting said inlet to said outlet, and latching mechanisms for latching the actuatable valve unit in open or closed positions, respectively. The actuatable valve unit comprises a solenoid and a pilot operated valve comprising a primary valve member and a pilot valve member. The solenoid comprises a coil assembly and a plunger assembly. Energizing the coil of the solenoid moves the plunger to open and close the valve. The latching mechanism for latching the actuatable valve unit in the open position comprises a permanent magnet and the latching mechanism for latching the actuatable valve unit in the closed position comprises a coil spring. Only a momentary pulse of voltage needs to be applied to the coil of the solenoid in order open or close the valve. Once in the opened or closed positions, the permanent magnet or the coil spring, respectively, latches the valve. Means to tune the characteristics of the voltage pulse required to open and close the valve are provided by an adjustment mechanism for adjusting the position of the permanent magnet with respect to the plunger.

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Schaumburg, IL, United States of America

James M Enger