Flow restriction system and method for patient infusion device

Patent 7018360 Issued on March 28, 2006. Estimated Expiration Date:

July 16, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Assignee

Insulet Corporation

Application

No. 10198690 filed on 07/16/2002

US Classes:

604/123, From pump injection device604/405, Filter for purifying or washing air entering container604/66, Sensor responsive to body condition604/415, Container with piercable closure600/579, Means for controlling liquid flow604/141, Material impelled by means (e.g., diaphragm, piston) moved by gas or vacuum pressure604/135, Spring drives piston604/132, Material impelled into body by contraction of expanded elastic material reservoir604/80, Gravity feed to body from plural material reservoirs604/131Treating material forced into or out of body by self-acting fluid pressure, motor-driven, or mechanical energy storing means (e.g., pressure infusion or aspiration, etc.)

Examiners

Primary: Lucchesi, Nicholas D.
Assistant: DeSanto, Matthew

Foreign Patent References

4200595 DE 07/01/1993
19920896 DE 09/01/2000
0342947 EP 05/01/1989
0763369 EP 03/01/1997
0867196 EP 03/01/1998
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WO98/00193 WO 01/01/1998
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WO99/56803 WO 11/01/1999
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WO00/29047 WO 05/01/2000
WO00/29049 WO 05/01/2000
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WO00/30705 WO 06/01/2000
WO00/78210 WO 06/01/2000
WO00/48112 WO 08/01/2000
WO00/61215 WO 10/01/2000
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WO01/76684 WO 10/01/2001
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WO02/26282 WO 04/01/2002

International Class

A61M 1/00

Abstract

A device for delivering fluid, such as insulin for example, to a patient. The device includes a flow path having an exit port assembly adapted to connect to a transcutaneous patient access tool, and a reservoir connected to the exit port assembly. The device also includes a flow restriction system having an air removal filter communicating with the flow path and allowing air to exit the flow path and preventing fluid from exiting the flow path, and a flow restrictor positioned within the flow path between the air removal filter and the exit port assembly. Among other features and advantages, the flow restriction system of the present invention allows the flow path of the fluid delivery device to be purged of air, or “primed” prior to operation, such that desired volumes of fluid can be accurately delivered by the device.

Other References

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