Patent ID: 7131410

Claim:
A solenoid spool valve comprising: a spool valve having a generally cylindrical sleeve provided with a fluid input port, a fluid output port, and a spool supported in the sleeve for axial displacement; a spring abutting a first working face of said spool to energize said spool in a first axial direction; and an electromagnetic actuator for providing an axial drive force to a second working face of said spool in a second axial direction that is substantially opposite to said first axial direction, wherein said first and second working faces disposed axially inside opposite axial end portions of a bearing that slidably supports said spool in said sleeve, said second working face is formed in an axially recessed portion at an end portion of said spool disposed near said electromagnetic actuator, the bottom face of said recessed portion serving as said second working face is tapered and opened torward said electromagnetic actuator, and a pressure-applying face of said electromagnetic actuator for pushing the bottom face of said recessed portion serving as said second working face is spherical.