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Medical pump

  • US 20040267201A1
  • Filed: 06/19/2003
  • Published: 12/30/2004
  • Est. Priority Date: 06/18/2003
  • Status: Active Grant
First Claim
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1. A medical pump, comprising a reservoir having a fluid enclosing portion;

  • a tubular element, the inside of which is arrangeable in fluid communication with the fluid enclosing portion for allowing fluid to pass into the tubular element;

    an inner seal movable inside the tubular element between an advanced and a retracted position, wherein the inner seal is retractable from the advanced position to enable the fluid to be transferred from the fluid enclosing portion into an internal space defined by the tubular element and the retracted inner seal, and wherein the inner seal is advanceable from the retracted position for delivering out of the pump fluid present in said internal space;

    wherein said fluid enclosing portion contains a volume of fluid sealed from communication with air and the fluid enclosing portion is adapted to reduce in volume essentially to the same extent as any volume of fluid transferred into said internal space of the tubular element.

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