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Control valve with mechanical feedback and method for controlling fluid flow

  • US 6,481,463 B1
  • Filed: 05/19/2000
  • Issued: 11/19/2002
  • Est. Priority Date: 05/21/1999
  • Status: Expired due to Term
First Claim
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1. A single-stage fluid flow cartridge control valve comprising:

  • a cage having openings therethrough;

    a first valve member internally slidable within the cage;

    a second valve member internally slidable within the first valve member; and

    an input mechanism coupled to the second valve member for moving the second valve member, wherein movement of the second valve member selectively opens fluid flow pathways between pairs of the openings, and movement of the first valve member selectively closes the fluid flow pathways;

    wherein the first valve member is a cam follower; and

    wherein the second valve member is a main spool having a bore forming part of the fluid flow pathways.

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