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Apparatus for controlling flow and pressure measurement

  • US 4,648,868 A
  • Filed: 09/30/1985
  • Issued: 03/10/1987
  • Est. Priority Date: 09/30/1985
  • Status: Expired due to Term
First Claim
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1. An apparatus comprising:

  • a valve body having a chamber and first and second ports communicating with said chamber;

    a valve element mounted at least partially in the chamber of the valve body for rotational movement relative to the valve body between first and second rotational positions and for axial movement relative to the valve body between first and second axial positions;

    said valve element and said valve body cooperating to define a flow passage between said ports which provides different flow characteristics in the first rotational position than in the second rotational position when the valve element is in said first axial position; and

    means responsive to movement of the valve element to the second axial position at least when the valve element is at the first rotational position for providing for flush flow through said chamber and between said ports with the flush flow being greater than the flow in either of said rotational positions with the valve element in said first axial position.

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