Solenoid driving device and solenoid valve

Details Solenoid driving device and solenoid valve Solenoid driving device and solenoid valve

2006-04-18

2006-04-18

Walczak, David J. (Department: 3751)

Valves and valve actuation

Electrically actuated valve

Including solenoid

C335S261000, C335S251000

Reexamination Certificate

active

07028980

ABSTRACT:
A solenoid driving device includes a coil formed by winding a coil wire on a bobbin formed of a non-magnetic material, end portions formed of a magnetic material which are disposed adjacent to both ends of the coil, a yoke formed of a magnetic material which is disposed encompassing the coil and the end portions, and a plunger disposed slidably in a hollow portion formed within the bobbin and end portions. The plunger includes a base formed of a magnetic material, a first layer formed of a non-magnetic material, and a second layer formed of a non-magnetic material having a friction coefficient smaller than that of the first layer. This allows magnetism to be severed between the plunger and end portions.

REFERENCES:
patent: 3851285 (1974-11-01), Rothfuss et al.
patent: 6547215 (2003-04-01), Matsusaka et al.
patent: 2002/0101314 (2002-08-01), Oishi et al.
patent: 2003/0116739 (2003-06-01), Murao et al.
patent: 0 148 018 (1985-07-01), None
patent: 2003-134781 (2003-05-01), None
patent: 2003-134781 (2003-05-01), None

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