Patent ID: 6916004
Filing Date: 2005-07-12
Classification: F16K,Y10T

Abstract:
1. An electromagnetic valve for opening and closing a fluid flow passage by operating a plunger under a magnetic force of a solenoid, said electromagnetic valve comprising: a valve head provided at one of opposite ends of the plunger; a fixed valve seat including an orifice providing a fluid flow passage, the valve head being adapted to abut against the valve seat to close the orifice, to thereby close the fluid flow passage; and a spring which resiliently presses the valve head in a direction for abutment of the valve head against the valve seat to close the orifice, wherein either one of the valve head and the valve seat is formed from a metallic material and the other of the valve head and the valve seat is formed from a non-metallic material having a greater hardness than said metallic material, wherein the valve head comprises a ball made of said non-metallic material, and is provided at the end of the plunger through a metal diaphragm.