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Metering valve with adjustable floating piston and pin assembly

  • US 5,494,070 A
  • Filed: 05/08/1995
  • Issued: 02/27/1996
  • Est. Priority Date: 05/06/1994
  • Status: Expired due to Term
First Claim
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1. An adjustable flow control valve for controlling flow of a fluid from a fluid supply, comprising:

  • (a) a housing defining an internal valve chamber having a first end and a second end, an inlet port opening into the first end of the valve chamber for placing the fluid supply in fluid communication with the valve chamber, and an outlet port for fluid flow to exit from the second end of the valve chamber;

    (b) a floating piston slidably mounted within the valve chamber between the inlet and outlet ports, the piston defining a longitudinal axis and an internal passage aligned on the longitudinal axis permitting fluid flow through the piston from the first end to the second end of the valve chamber;

    (c) a valve seat included in the housing in the second end of the valve chamber, upstream of the outlet port;

    (d) a valve member carried by the floating piston and selectively positionable relative to the piston and to the valve seat between a closed position, wherein the valve member blocks the valve seat to prevent fluid flow through the outlet port, and an open position, wherein the valve member is spaced from the valve seat to permit fluid flow through the outlet port; and

    (e) means for selectively positioning the valve member relative to the piston during operation of the valve to adjust the rate of fluid flow.

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