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Flow regulating control valve and method for regulating fluid flow

  • US 6,688,319 B2
  • Filed: 04/10/2002
  • Issued: 02/10/2004
  • Est. Priority Date: 04/10/2002
  • Status: Expired due to Term
First Claim
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1. A fluid regulating control valve, comprising:

  • a housing having an upstream region and a downstream region and having a control orifice formed therein adjacent the downstream region;

    a piston slidably disposed within the housing, the piston having a fluid passage defining an intermediate region disposed between the upstream region and the downstream region, the piston also having an edge adjacent the upstream region;

    an elastic member disposed within the housing for opposing translation of the piston within the housing;

    a throttling element adjacent the upstream region, the throttling element having a throttling surface adjacent the edge of the piston, the throttling surface and the edge defining a throttling orifice therebetween; and

    an equalization aperture formed in the housing to allow a fluid in the downstream region to enter an equalization chamber defined by a region between an inside surface of the housing and an outside surface of the piston.

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