Patent ID: 7219876

Claim:
An electromagnetic valve apparatus comprising: a core having an embedded coil; an armature located facing said core so as to be able to be driven by electromagnetic force; a valve body fitted into a valve seat member for relative reciprocation, said armature being fixed to said valve body by a bolt, and said valve seat member having a valve seat part; wherein the surface of said core facing said armature is flat and the surface of said armature facing said core is convexly spherical; wherein said armature is movable between an attracted position in which said valve body is in a seated position seated on said valve seat part and an unattracted position in which said valve body is in an open position; wherein a distance between a central part of the surface of said core facing said armature and the surface of said armature facing said core is greater than a distance of said valve body between the open position and the seated position such that a gap is secured between the surface of said core facing said armature and the surface of said armature facing said core when said valve body is in the seated position.