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Load cell pressure sensor for pump cassette

  • US 5,319,979 A
  • Filed: 12/15/1992
  • Issued: 06/14/1994
  • Est. Priority Date: 12/15/1992
  • Status: Expired due to Term
First Claim
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1. A pressure detection mechanism for use with a processor controlled pumping apparatus having a removable pumping cassette, the detection mechanism comprising:

  • a mechanism housing mounted in the pumping apparatus;

    means for sensing force mounted in the housing;

    a plunger axially slidable in the housing having a first and second end, the first plunger end adapted for perpendicular abutting contact with the pumping cassette, the second plunger end adapted for abutting contact with the force sensing means;

    bearing means mounted in the housing for providing axial sliding for the plunger to axially contact the sensing means;

    biasing means mounted on the housing for biasing the sensing means axially into contact with the housing; and

    means for transmitting force signals from the sensing means to the processor of the pumping apparatus.

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