Infusion pump
First Claim
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.
2 Assignments
0 Petitions
Accused Products
Abstract
The pump (10 or 150) is adapted to deliver liquid (24 or 166) to an individual. The pump comprises a syringe section (12 or 152) including a syringe barrel (18 or 160) having a nozzle (20 or 162) at one end and a syringe piston (22 or 170) in the barrel (18 or 160), an intermediate section (14 or 154 and 156) mounting a piston rod (46 or 265) for axial movement thereof, one end of the rod (46 or 265) being associated with the piston (22 or 170) for acting on the piston (22 or 170), and a drive section (16 or 158) at the other end of the pump (10 or 150) including a gas spring (113 or 300) associated with the other end of the piston rod (46 or 265) for acting on same to move the piston rod (46 or 265) which moves the syringe piston (22 or 170) to cause liquid to be delivered from the syringe barrel (18 or 160).
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Citations
23 Claims
- 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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16. An insulin infusion pump comprising means for storing a supply of insulin solution and including outlet means, drive means associated with said storage means for acting on said storage means to cause dispensing of liquid therefrom at a predetermined slow rate, and timing means associated with said drive means for dampening movement of a drive member of said drive means, said timing means including a capsule having a dilatant material therein, said drive means including a piston rod extending through said capsule, and means on said piston rod within said capsule against which the dilatant material acts for causing said piston rod to move at a timed rate.
Specification