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US 12,409,268 B2Granted
Pumping fluid delivery systems and methods using force application assembly
AssigneeDEKA Products Limited Partnership
InventorsDean Kamen, Larry Brian Gray, Eric Yeaton
Life of this patent
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Abstract
A method of dispensing a therapeutic fluid from a line includes providing an inlet line connectable to an upstream fluid source. The inlet line is in downstream fluid communication with a pumping chamber. The pumping chamber has a pump outlet. The method also includes actuating a force application assembly so as to restrict retrograde flow of fluid through the inlet while pressurizing the pumping chamber to urge flow through the pump outlet. A corresponding system employs the method.
Claims21
A system for pumping a medical fluid through a line in an infusion pump, the system comprising:
- a pumping chamber in the infusion pump comprising:
- an inlet in fluid connection with a fluid source;
- and
- a pump outlet;
- an inlet sealing member comprising a sealing spring;
- a pump compressing member comprising a return spring;
- and
- a pump plate directly attached to the inlet sealing member and the pump compressing member;
- wherein during a compressive stroke the pump compressing member is driven towards the pumping chamber and the sealing spring transmits a driving force to the inlet sealing member, and
- wherein the compressive stroke causes a restriction of retrograde flow of fluid from the pumping chamber through the inlet and causes an increase in pressure within the pumping chamber.
7 more elements
Dependencies are inferred from the claim text.