Variable Volume, Shape Memory Actuated Insulin Dispensing Pump
2 Assignments
0 Petitions
Accused Products
Abstract
A portable pumping system provides insulin or other drugs to a user. A shape memory element is used to actuate the pump and an intelligent system controls the actuator in order to minimize stresses within the system and provide accurate and reliable dosage delivery. The control system utilizes various types of feedback to monitor and optimize the position of the pumping mechanisms. Physical design aspects also minimize stress and the combination of the physical design aspects and the intelligent operation of the system results in a lightweight and cost effective pump that may be used in a disposable fashion if desired.
74 Citations
15 Claims
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1-9. -9. (canceled)
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10. A hydraulic pump comprising:
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a chamber; a piston within the chamber; a shape memory element that drives the piston; a stroke length equal to the maximum distance of travel of a pumping surface of the piston; a position sensing mechanism that senses the position of the piston; and a positioning system including a linear feedback mechanism, wherein the positioning system moves the piston in increments less than the stroke length, resulting in a partial piston stroke. - View Dependent Claims (11, 12, 13, 14)
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15-27. -27. (canceled)
Specification