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Process for the filing of a propellant chamber of a gas driven pump

  • US 5,766,150 A
  • Filed: 05/10/1996
  • Issued: 06/16/1998
  • Est. Priority Date: 05/11/1995
  • Status: Expired due to Term
First Claim
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1. A process for the filling of a propellant chamber of a gas pressure driven implantable infusion pump with a fluid propellant, comprising the steps of:

  • dividing a pumping chamber of the gas pressure driven pump into the propellant chamber and a liquid storage chamber,evacuating the propellant chamber of substantially all gases;

    filling a pillow with the propellant, wherein the pillow is essentially permeable to and inert to the propellant;

    inserting the pillow filled with the propellant in the propellant chamber; and

    closing the propellant chamber.

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  • 6 Assignments
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