Plunger assembly for patient infusion device
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United States of America Patent
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Issued Date -
Jun 5, 2008
app pub date -
Jun 6, 2002
filing date -
Jun 6, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A device for delivering fluid, such as insulin, to a patient. The device includes an exit port assembly, a syringe-like reservoir including a side wall extending along a longitudinal axis towards an outlet connected to the exit port assembly, and a plunger assembly received in the reservoir. The plunger assembly includes a longitudinal segment connecting first and second lateral segments. The longitudinal segment includes a spring biasing the first and the second lateral segments longitudinally apart, and an actuator arranged to overcome the spring and bias the first and the second lateral segments longitudinally together upon actuation. Successively actuating the actuator causes longitudinal movement of the plunger assembly towards the outlet of the reservoir in order to cause fluid to be dispensed from the reservoir to the exit port assembly. According to one exemplary embodiment, the actuator comprises an elongated shape memory element.
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