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CONTROLLING FLOW OF MEDICAL FLUIDS

  • US 3,823,724 A
  • Filed: 05/25/1973
  • Issued: 07/16/1974
  • Est. Priority Date: 05/25/1973
  • Status: Expired due to Term
First Claim
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1. A pinch valve assembly for controlling the flow of medical fluids comprising:

  • a non-sterile body;

    a groove in the surface of said body;

    a sterile disposable pliable tube of synthetic material having memory disposed at least in part in the said surface groove;

    a non-sterile stem;

    means mounting the stem within said body for (a) lineal reciprocation between extended and retracted positions and (b) rotational displacement between functional and nonfunctional positions;

    means normally biasing the stem into one of said two lineal positions;

    force-applying means displacing the stem into the other of said two lineal positions counter to said bias;

    an arm carried by the stem and juxtaposed the groove when the stem is in the functional rotational position such that the arm pinches the tube closed against the body groove to prevent fluid flow through the tube when the stem is in a first of said two lineal positions, and the arm releases the tube to accommodate the flow of medical fluid through the tube when in the second of said two lineal positions;

    means rotataionally displacing the stem and arm to the nonfunctional rotational position whereby the tube, after it becomes contaminated, may be readily removed from the groove and replaced in the groove by another sterile tube, following which the stem and arm are returned to their functional rotational position.

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