Normally closed solenoid valve

Details Normally closed solenoid valve Normally closed solenoid valve

2007-07-10

2007-07-10

Bastianelli, John (Department: 3753)

Valves and valve actuation

Electrically actuated valve

Remote or follow-up control system for electrical actuator

C251S129150, C251S337000

Reexamination Certificate

active

10887318

ABSTRACT:
A normally closed solenoid valve includes a fixed core, a valve portion including a valve seat and a valve body, a movable core disposed between the fixed core and the valve seat, a resilient biasing member for biasing the movable core in a valve-closing direction and a coil. When energized, the coil generates an attracting force between the movable core and the fixed core against a biasing force by the resilient biasing member to cause the movable core to retreat from an initial position where the valve seat is in a closed state. When a characteristic graph line of spacing distance/attracting force that defines the attracting force in relation with a spacing distance between the fixed core and the movable core provides an inclination A (N/mm) at the initial position, the compression resiliency coefficient of the resilient biasing member is set to A (N/mm).

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European Search Report dated Nov. 8, 2004.

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