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Pressure equalized flow control apparatus and method for endoscope channels

  • US 5,692,729 A
  • Filed: 02/16/1996
  • Issued: 12/02/1997
  • Est. Priority Date: 02/16/1996
  • Status: Expired due to Fees
First Claim
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1. A pressure equalized valve, comprising:

  • an enclosed valve chamber having inlet and outlet ports allowing passage of fluid into and out of the valve chamber;

    a hollow valve conduit positioned within the valve chamber and connecting the inlet port with the outlet port, the valve conduit including a resilient tube with an interior and an exterior;

    a valve actuator positioned at least partially within the valve chamber, the valve actuator being configured to control pinching and unpinching of the resilient tube to regulate fluid flow through the resilient tube of the valve conduit; and

    a pressure equalizing vent coupling the interior of the valve conduit with the exterior of the valve conduit within the valve chamber in a manner that ensures that a fluid pressure within the valve conduit substantially equals a fluid pressure on the exterior of the valve conduit within the valve chamber.

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