Patent ID: 8931758
Filing Date: 2015-01-13
Classification: F16K,Y10T

Abstract:
1. A solenoid valve comprising: a valve sleeve including a spool arranged therein in a movable condition in the axial direction; a solenoid case connected to one end portion in the axial direction of said valve sleeve; a molded object mounted inside of said solenoid case and including a coil; a center post provided on the valve sleeve side of the inside of said molded object; a side ring provided on the opposite side from said valve sleeve of the inside of said molded object; a plunger arranged in said side ring and said center post in a movable condition in the axial direction, said plunger being moved in the axial direction by magnetic force generated by said coil; a breathing hole formed in proximity to an end portion of the solenoid case side on said valve sleeve, the breathing hole allowing a fluid to flow into and from a space on the spool side of said plunger, and a breathing groove formed on any one or both of said center post and said spool, and forming a fluid passage communicating with said space on the spool side of said plunger and said breathing hole when said spool is arranged closest to said plunger and a plunger side end portion of said spool and a spool side end portion of said center post come in contact with each other; wherein said breathing hole is formed to communicate with said breathing groove communicating with the space on said spool side of said plunger to a void formed at an end portion on the valve sleeve side of said solenoid case between an inner surface of said solenoid case and an outer surface of said molded object.