초록 ▼

An electrically-operated plunger-type valve assembly includes a housing, an electromagnetic actuator and a plunger assembly, which is positioned in the housing and supported for movement in the housing. The valve assembly includes a biasing member, which applies a force to the plunger assembly to cl

An electrically-operated plunger-type valve assembly includes a housing, an electromagnetic actuator and a plunger assembly, which is positioned in the housing and supported for movement in the housing. The valve assembly includes a biasing member, which applies a force to the plunger assembly to close the communication between inlet and outlet ports to thereby close the valve assembly. The actuator generates a magnetic field to move the plunger assembly against the biasing member force to move the plunger assembly to control the valve. The plunger assembly includes a seal that seals the communication passage to close the valve when the plunger assembly is moved to its closed position. Pressurized fluid in the inlet port causes the seal to radially seal against the communication passage, which reduces the required biasing member spring force and reduces the energy needed to move the plunger assembly.

대표청구항 ▼

1. An electrically-operated plunger-type valve assembly comprising:a housing having an interior chamber, an inlet port, and an outlet port, said interior chamber having a communication passage between said inlet port and said outlet port; an electromagnetic actuator positioned in said interior chamb

1. An electrically-operated plunger-type valve assembly comprising:a housing having an interior chamber, an inlet port, and an outlet port, said interior chamber having a communication passage between said inlet port and said outlet port; an electromagnetic actuator positioned in said interior chamber; a plunger assembly positioned in said interior chamber and supported for reciprocal axial movement in said interior chamber between a first position and a second position, said communication passage being open to permit communication between said inlet port and said outlet port when said plunger assembly is moved to said first position thereby opening said valve assembly, and said communication passage being closed between said inlet port and said outlet port when said plunger assembly is moved to said second position whereby said valve assembly is closed; and a biasing member applying a spring force to said plunger assembly to urge said plunger assembly to said second position, said electromagnetic actuator generating a magnetic field having sufficient magnitude to move said plunger assembly against said force of said biasing member to move said plunger assembly to said first position when said electromagnetic actuator is energized to selectively move said plunger assembly between said first and second positions to control the communication between said inlet port and said outlet port, and said plunger assembly having a seal member sealing said communication passage to close communication between said inlet port and said outlet port when said plunger assembly is moved to said second position, and said seal member being acted upon by pressurized fluid in said inlet port to radially seal against said communication passage whereby said spring force of said biasing member can be reduced which in turn reduces the amount of energy needed to move said plunger assembly between said first and second positions.