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Pressure infusion pump

  • US 5,954,696 A
  • Filed: 12/15/1997
  • Issued: 09/21/1999
  • Est. Priority Date: 12/15/1997
  • Status: Expired due to Fees
First Claim
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1. A portable, ambulatory infusion pump comprising:

  • a housing defining an interior volume, the housing having exterior dimensions so as to be held comfortably in a human hand, the housing further comprising;

    a base;

    a cover, configured to be slidably mounted on the base;

    an end portion, the end portion including an access opening communicating with the interior volume, the access opening configured to receive an infusion set access spike therethrough;

    a pressurization system, further comprising;

    a replaceable, miniature compressed gas cylinder;

    a mechanical pressure regulator coupled to the cylinder by a bushing;

    a flexible inflatable bladder connected to receive pressure-regulated gas, whereby the bladder is pressurized upon introduction of pressure-regulated gas and volumetrically expands in response thereto;

    a pressure member angularly disposed within the housing and having a substantially flat pressure surface;

    a pivotally movable pressure plate, the flexible inflatable bladder disposed between the pressure surface and the pivotally movable pressure plate, the bladder expansion causing the movable pressure plate to rotatable displace in response thereto, the pressure surface and rotatably movable pressure plate defining an area therebetween sized to accept a standard, disposable pre-filled infusion medicament container; and

    a safety interlock assembly, coupled between the pressure regulator and the inflatable bladder, the safety interlock assembly operatively responsive to the cover being completely mated to the housing base, the safety interlock assembly preventing introduction of the pressure-regulated gas to the bladder unless the cover is completely mated to the base.

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