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SWITCHING VALVE

  • US 20170089483A1
  • Filed: 03/16/2015
  • Published: 03/30/2017
  • Est. Priority Date: 03/17/2014
  • Status: Abandoned Application
First Claim
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1. A switching valve comprising:

  • a cylinder;

    a sliding core slidable with respect to an inner surface of the cylinder in a given axial direction between a first end portion of the cylinder and a second end portion of the cylinder, the sliding core having a sliding core inner space;

    a poppet seal slidable with respect to an inner surface of the sliding core in the axial direction;

    a seal engagement protrusion protruding toward an opening formed in the sliding core on a first end portion side of the cylinder so as to prevent the poppet seal from falling off;

    a biasing member disposed in the sliding core inner space for biasing the poppet seal toward the seal engagement protrusion;

    a valve seat formed in the first end portion of the cylinder such that the poppet seal can be seated on the valve seat;

    an end port formed in the first end portion of the cylinder and penetrating through the valve seat for communicating with an outside of the cylinder;

    a sliding core internal channel formed in the sliding core and configured to communicate with the opening;

    a sliding core penetrating channel penetrating through a side wall of the sliding core such that the sliding core internal channel and an outer periphery of the sliding core communicate with each other;

    a side wall communication channel disposed between the inner surface of the cylinder and an outer surface of the sliding core so as to communicate with the sliding core penetrating channel; and

    a side wall port formed in a side wall of the cylinder for communicating the side wall communication channel and an outside of the cylinder with each other,wherein the poppet seal is switchable between a first keeping state in which the poppet seal is contact with the end port such that the end port and the side wall port do not communicate with each other and a second state in which the poppet seal is separated from the end port such that the end port and the side wall port communicate with each other.

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