Electromagnetic valve

Details Electromagnetic valve Electromagnetic valve

2005-07-12

2005-07-12

Look, Edward K. (Department: 3751)

Valves and valve actuation

Electrically actuated valve

Including solenoid

C251S359000, C251S368000

Reexamination Certificate

active

06916004

ABSTRACT:
An electromagnetic valve for opening and closing a fluid flow passage by operating a plunger under a magnetic force of a solenoid. The valve comprises a valve head provided at one of opposite ends of the plunger, and a fixed valve seat including an orifice providing a fluid flow passage. The valve head is adapted to abut against the valve seat to close the orifice. A spring resiliently presses the valve head in a direction for abutment of the valve head against the valve seat to close the orifice. Either one of the valve head and the valve seat is formed from a metallic material and the other is formed from a non-metallic material having a greater hardness than the metallic material. It is preferred that the metallic material be a highly corrosion-resistant metal alloy containing Ni in a high amount ratio, and the non-metallic material be of a ceramic type.

REFERENCES:
patent: 5100100 (1992-03-01), Benson et al.
patent: 5253671 (1993-10-01), Kolenc
patent: 5437542 (1995-08-01), Ewing
patent: 5755428 (1998-05-01), Ollivier
patent: 5785297 (1998-07-01), Ha
patent: 5862995 (1999-01-01), Wu
patent: 6431521 (2002-08-01), Jones
patent: 9-72435 (1997-03-01), None
patent: 2002-250451 (2002-09-01), None

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