Spring-powered infusion pump

Abstract

A spring-powered infusion pump includes a syringe barrel 20 having two opposing openings 30, 55 forming two chambers 80, 90 between the first opening 30 and the plunger 40, and the second opening 55 and the plunger 40. The dispenser opening 30 has a one-way valve 35 to selectively release fluid retained within the first chamber 80. The second opening 55 is capped, and a spring 60 is compressed between the plunger 40 and syringe cap 50 within the second chamber 90. The spring 60 applies a force to the plunger 40 in the direction of the first opening 30. However, the one-way valve 35 retains the fluid within the first chamber 80, despite the force applied to the plunger 40, until a tubing set 70 equipped with an infuser connector 75 is attached to the dispenser opening 30 of the syringe barrel 20. The infuser connector 75 is insertable through the one-way valve 35 and thus provides a passageway for the fluid retained within the first chamber 80 of the syringe barrel 20. Once attached, the force from the spring 60 causes the plunger 40 to move toward the dispenser opening 30, thereby dispensing the fluid from the first chamber 80 through the infuser connector 75 and one-way valve 35 into the tubing set 75.

Dependencies are inferred from the claim text.