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Check valve for micro electro mechanical structure devices

  • US 6,834,671 B2
  • Filed: 12/22/2003
  • Issued: 12/28/2004
  • Est. Priority Date: 07/26/2001
  • Status: Expired due to Fees
First Claim
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1. A check valve for micro electromechanical structure devices, said check valve being connectable to a supercritical fluid hydraulic system being rapidly charged with pressurized fluid under superatmospheric pressures and comprising:

  • a) a valve body having a fluid inlet conduit and a fluid outlet conduit;

    b) a valve chamber of a larger internal diameter than said conduits being interposed between said fluid inlet and fluid outlet conduit in fluid flow communication with said fluid inlet and fluid outlet conduits, a valve seat being formed between said valve chamber and an adjoining end of said fluid input conduit;

    c) a fluid bypass channel connecting said fluid outlet conduit and said valve chamber;

    d) and a freely movable valve member being located in said valve chamber and having an external diameter in slidable contact with the internal diameter of said valve chamber, said valve member being axially displaced into a first valve-open position within said chamber facilitating an unobstructed flow by said pressurized fluid from said inlet conduit into said bypass channel through said valve chamber for charging said system, and responsive to a letdown of pressure upon said system having been charged, said valve member being axially displaced within said valve chamber into contact with said valve seat in a second valve-closing position so as to inhibit fluid flow through said check valve and seal said supercritical fluid hydraulic system.

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