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Infusion pump with disposable cassette

  • US 4,657,490 A
  • Filed: 03/27/1985
  • Issued: 04/14/1987
  • Est. Priority Date: 03/27/1985
  • Status: Expired due to Fees
First Claim
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1. A pump for parenteral administration of fluid to a patient at a selectable rate comprising:

  • a flexible cassette formed of a pair of substantially flat flexible sheets defining a flow path between an inlet and an outlet, and a pump chamber located in that flow path;

    an instrument body having a compartment receiving the cassette and confining the pump chamber;

    pumping means associated with the instrument body adjacent the compartment for confining the pump chamber, comprising a moveable hub circumferentially surrounded by radially extending petal-shaped sections each of which is pivotally mounted to the hub at its inner end and to a portion of the instrument body at its outer end; and

    activation means for activating the pumping means to move the hub and the petal-shaped sections into the compartment to reduce the volume of the pump chamber at a rate dependent upon the selected rate.

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