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Cassette for an infusion pump

  • US 5,904,668 A
  • Filed: 03/06/1995
  • Issued: 05/18/1999
  • Est. Priority Date: 03/06/1995
  • Status: Expired due to Fees
First Claim
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1. A cassette adapted to be insertable into an infusion pump having a rotary pump wheel and removable from said infusion pump, said cassette comprising:

  • a housing having a length, a width, and a height, said housing having an upper surface with a first aperture formed therein, said length of said housing being about six times said height of said housing, said height of said housing being about twice said width of said housing;

    a length of flexible tubing supported by said housing;

    a first vertically movable member having a first surface and a second surface, said first surface having a portion which is arcuate in shape and adapted to substantially conform with a path of rotation defined by said rotary pump wheel of said infusion pump, said second surface being disposed within said aperture formed in said upper surface of said housing so that said first vertically movable member may be vertically displaced due to physical contact with said second surface of said first vertically movable member;

    a second vertically movable member disposed in said housing, said second vertically movable member having a slot formed therein, a portion of said flexible tubing being disposed within said slot, said second vertically movable member being movable between a clamped position in which said flexible tubing is clamped to prevent any substantial liquid flow therethrough and an unclamped position in which substantial liquid flow through said flexible tubing is enabled; and

    a spring for biasing said second vertically movable member to said clamped position.

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