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Cannula operated pinch valve

  • US 6,461,345 B1
  • Filed: 11/09/1999
  • Issued: 10/08/2002
  • Est. Priority Date: 11/16/1998
  • Status: Expired due to Fees
First Claim
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1. A cannula operated, pinch valve, for use with a reaction vessel, the pinch valve comprising:

  • a) a section of PTFE tubing being compressed along a middle region thereof;

    b) a valve-sealing, elastomeric material through which the PTFE tubing is fitted, the middle region of the tubing being compressed and sealed, wherein the elastomeric material keeps the tubing compressed and sealed;

    c) a shrink-sleeve of suitable dimension fully enclosing the elastomeric material and tubing to form the pinch valve; and

    d) a cap fitted over the pinch valve to seal the pinch valve to the reaction vessel, wherein the reaction vessel is sealed, the seal being broken by insertion of the cannula through the tubing into the reaction vessel, and the reaction vessel being re-sealed upon removal of the cannula therefrom.

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