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Flow control/shut-off valve assembly

  • US 9,410,636 B2
  • Filed: 03/17/2015
  • Issued: 08/09/2016
  • Est. Priority Date: 01/25/2014
  • Status: Active Grant
First Claim
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1. A flow valve assembly comprising:

  • a piston operable between an open position and a closed position;

    a controller mechanically coupled to the piston to operate the piston between the open position and the closed position when the rate of fluid flow exceeds a predetermined value, the controller comprising;

    a first linkage member operable between a first position in which the piston is in the open position, and a second position in which the piston is in the closed position;

    a second linkage member having a first end pivotally coupled to the first linkage member to move the first linkage between the first position and the second position and a second end;

    a first biasing member having a first end coupled to the second linkage member between the first end and the second end a second end connected to a support such that, when the first linkage member is in the second positon, the first biasing member biases the first linkage member toward the first position.

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