Semi-pilot operated four-way valve
Solenoid controlled valve
Balanced type direct-acting electromagnetic valve Patent #: 5535783
ApplicationNo. 712196 filed on 11/15/2000
US Classes:137/596.17, Motor137/870With electrical actuation
ExaminersPrimary: Michalsky, Gerald A.
Attorney, Agent or Firm
Foreign Patent References
International ClassF15B 013/044
Foreign Application Priority Data1999-11-24 FR
AbstractA miniature solenoid valve comprising:a valve body;an electromagnet having a yoke secured to the body and a plunger core movable relative to the yoke along a longitudinal axis of the electromagnet;a pneumatic chamber formed in the body adjacent to the end of the plunger core that faces away from the yoke, into which chamber there opens out freely a first duct and, each via a respective seat, second and third ducts, with the openings of the second and third ducts facing in opposite directions and being coaxial about the longitudinal axis of the electromagnet; andfirst and second valve members facing the two seats respectively with clearance, the first valve member being carried by the plunger core and the second valve member being carried by moving equipment held in contact with the plunger core so as to be moved therewith, in which the two seats are provided at respective ends of a single seat-carrier piece which includes internally the ends of the second and third ducts, said piece being engaged in the body of the valve along the common axis of the electromagnet and the two seats, and being immobilized in a precise position along said axis and specific to each valve.