×

Systems and methods for cassette identification for drug pumps

  • US 5,531,697 A
  • Filed: 04/15/1994
  • Issued: 07/02/1996
  • Est. Priority Date: 04/15/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. A pump apparatus comprising:

  • a control module including a processor and a pumping mechanism for pumping fluid through a fluid tube;

    a base plate selectively mounted to the control module;

    a fluid tube positioned between the base plate and the pumping mechanism of the control module;

    a projection extending from the base plate toward the control module;

    two reciprocally mounted plungers mounted to the control module; and

    two optical sensors mounted to the control module, each of which is capable of sensing a portion of one of the plungers and sending a signal to the processor, the plungers being movable between first and second positions, the first position including the portion of the plunger positioned in a first position relative to the optical sensor, and the second position including the portion of the plunger positioned in a second position different from the first position, at least one of the plungers being moved by the projection.

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