Proportional solenoid valve

Valves and valve actuation – Electrically actuated valve – Having means to produce proportional flow

Reexamination Certificate

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Details

C251S129180, C251S285000

Reexamination Certificate

active

06938875

ABSTRACT:
In a proportional solenoid valve, a valve drive portion that includes a coil, a core that is excited by application of a current to the coil, a plunger that is displaced by a magnetic attraction force generated by the excited core, and a spring that biases the plunger in a direction in which a distance to the core is increased. The spring is set so that a space is maintained between the plunger and an attraction surface of the core when the spring is fully compressed.

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