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Combined metering valve and pressure regulating valve

  • US 8,656,944 B2
  • Filed: 10/10/2008
  • Issued: 02/25/2014
  • Est. Priority Date: 10/10/2008
  • Status: Active Grant
First Claim
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1. A valve combining a metering function and a pressure regulating function comprising:

  • a valve housing to house a metering valve, said metering valve being movable by a control to meter an amount of fluid delivered from an inlet to an outlet;

    a pressure regulating valve being moveable relative to said metering valve, said pressure regulating valve being received within the valve housing and being supplied with a pressure delivered into said inlet on a first face, and a pressure downstream of said outlet on a second face, and said pressure regulating valve acting to regulate a pressure difference between the inlet and outlet;

    said control including an electronic control for selectively moving the metering valve;

    said electronic control controlling a difference in pressure of fluid at opposed sides of said metering valve;

    said pressure regulating valve being slidable along a portion of said metering valve, such that said pressure regulating valve and said metering valve move along coaxial axes;

    wherein said metering valve has a first enlarged land which meters the flow of a fluid from the inlet through the outlet; and

    wherein said pressure regulating valve controls an amount of fluid that is delivered from the inlet to a second outlet leading to a bypass line.

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