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Infusion pump

  • US 4,561,856 A
  • Filed: 08/18/1983
  • Issued: 12/31/1985
  • Est. Priority Date: 08/18/1983
  • Status: Expired due to Term
First Claim
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1. A pump for delivering liquid to an individual in either an automatic basal mode of delivery or a manual bolus mode of delivery, said pump comprising a syringe section including a syringe barrel having a nozzle at one end and a syringe piston in said barrel, an intermediate section mounting a piston rod for axial movement thereof, one end of said rod being associated with said piston for acting on said piston, said intermediate section including timing means for causing delivery of liquid at a contant rate of basal delivery, a drive section at the other end of said pump including a gas spring associated with the other end of said piston rod for acting on same to move said piston rod to move said syringe piston to cause liquid to be delivered from said syringe barrel and bolus control means associated with said drive section for causing a bolus delivery of liquid, overriding the basal mode of delivery.

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