Abstract: An electromagnetic valve having a flow passage opened and closed by the drive of an electromagnet. The electromagnetic opertor includes a casing, an electromagnetic coil, a plunger adapted to be driven by the electromagnetic coil, a sleeve for guiding the plunger, a yoke fitted around the sleeve and formed with an axially extending central portion and a notch in its outer circumference, and a push rod fixed to the plunger. The valve portion includes an outer valve body, having an input port and a discharge port, which is fixed to the casing of the electromagnet with a flange fitted over and mating with the raised central portion of the yoke. An inner valve body is mounted in the outer base and has an axial bore for receiving the push rod. A ball is interposed between the outer valve body and the inner valve body for opening or closing the passage of the valve, extending from the input port to the discharge port, by the drive of the push rod.

Abstract: A coil assembly for an electromagnetic valve to be used in a vehicular hydraulic control circuit. The coil assembly includes an electromagnetic coil, a coil bobbin wound with the electromagnetic coil and having a flange, a terminal holder molded integrally with the flange of the coil bobbin, connection terminals fixed to the terminal holder, an insulating casing covering the coil bobbin and a terminal housing molded integrally with the insulating casing for covering the terminal holder and receiving the connection terminals to form a male connector terminal.

Abstract: A two-way electromagnet has an input port and a discharge port at opposing ends of a flow passage which is opened or closed by the drive of an electromagnet. The two-way electromagnetic valve operating portion or module includes an electromagnetic coil, a plunger adapted to be driven by the electromagnetic coil, a yoke fitted around a sleeve and a push rod fixed in the plunger. The valve portion or module includes an outer valve body in which the input port and a valve seat are formed, an inner valve body formed with a bore for receiving the leading end of the push rod therethrough and a passage communicating with the discharge port. The valve member is a ball arranged between the valve seat of the outer valve body and the inner valve body. The push rod is moved forward when the electromagnetic coil is deenergized to bring the ball into abutment against the valve seat to thereby close the input port.

Abstract: A three-way solenoid valve consisting of a solenoid device portion 20 and a valve portion 40. The same solenoid device portion 20 is used whether the valve is normally open or normally closed. The solenoid device portion 20 comprises a plunger 23 driven by a solenoid coil 27, a sleeve 26 guiding the plunger, a yoke 32 fitted over the sleeve, a push rod 24 mounted to the plunger. The valve portion 40 comprises an inner base 46 having a valve seat, an outer base 42 having a second valve seat, and a ball 48 mounted between the valve seats. The inner base is mounted on the outer base. The front end of the push rod can bear against the ball. The outer base 42 bears against the yoke 32.

Abstract: A resin molding and coil device for an electromagnetic valve for use in a vehicular hydraulic control circuit. The coil device includes a coil bobbin, an electromagnetic coil wound on the coil bobbin, leads extending from the electromagnetic coil, connection terminals connected to the leads and assembled with the coil bobbin, a molding resin covering the entire device excepting portions of the connector terminals and a thermal shock absorber, having high heat resistance, flexibility and insulating value, interposed between the leads and the molding resin. The coil device may further have grooves formed in the coil bobbin with the leads arranged therein.