×

Diaphragm pump cassette

  • US 4,798,589 A
  • Filed: 06/15/1987
  • Issued: 01/17/1989
  • Est. Priority Date: 06/15/1987
  • Status: Expired due to Term
First Claim
Patent Images

1. A cassette for use in a volumetric infusion pump comprising:

  • a cassette body having a volumetric chamber disposed therein, said chamber including an opening such that a piston of corresponding size is capable of sliding into the chamber through the opening, said cassette body further comprising a base surrounding said opening;

    a piston which is capable of reciprocating within said volumetric chamber;

    means for allowing fluids to enter and leave the volumetric chamber in response to the reciprocating movement of the piston;

    a diaphragm disposed between the piston and the volumetric chamber;

    a cuff formed around the periphery of said diaphragm for attachment to said cassette body; and

    a diaphragm casing twistingly engageable with said cassette body by inserting said diaphragm casing into a first position and rotating said casing approximately 90 degrees into a second position for securing said cuff of said diaphragm between said casing and said base of said cassette body.

View all claims
  • 15 Assignments
Timeline View
Assignment View
    ×
    ×