Source: http://www.google.com/patents/US8029250?dq=5,963,646
Timestamp: 2014-03-11 14:24:20
Document Index: 247826053

Matched Legal Cases: ['Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 200680018051', 'Application No. 200680018073', 'Application No. 03770727', 'Application No. 06750300', 'Application No. 10013445', 'Application No. 10013449']

Patent US8029250 - Variable volume, shape memory actuated insulin dispensing pump - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA 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...http://www.google.com/patents/US8029250?utm_source=gb-gplus-sharePatent US8029250 - Variable volume, shape memory actuated insulin dispensing pumpAdvanced Patent SearchPublication numberUS8029250 B2Publication typeGrantApplication numberUS 12/345,563Publication dateOct 4, 2011Filing dateDec 29, 2008Priority dateOct 9, 2002Also published asCA2604498A1, CA2604498C, CA2718306A1, CA2718306C, CN101189431A, CN101189431B, EP1877662A2, EP1877662A4, US7922458, US7993108, US7993109, US8029245, US8047812, US20050238503, US20090105648, US20090105649, US20090112156, US20090112165, US20090163869, US20120083730, WO2006113521A2, WO2006113521A3Publication number12345563, 345563, US 8029250 B2, US 8029250B2, US-B2-8029250, US8029250 B2, US8029250B2InventorsBenjamin M. Rush, Christopher V. Reggiardo, Arthur E. Anderson, IIIOriginal AssigneeAbbott Diabetes Care Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (114), Non-Patent Citations (75), Classifications (44) External Links: USPTO, USPTO Assignment, EspacenetVariable volume, shape memory actuated insulin dispensing pumpUS 8029250 B2Abstract 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.
a shape memory element that drives the piston from a first position to a second position, such that a fluid is drawn into the chamber when the piston is moved from the first position to the second position;
a stroke length equal to the maximum distance of travel between the first position and the second position;
a position sensing mechanism that senses a position of the piston including the first position and the second position, wherein the position sensing mechanism is configured to detect a fault when the piston does not travel the entire stoke length;
a positioning system configured to move the piston in increments less than the stroke length toward at least one of the first position and the second position when the fault is detected, resulting in a partial piston stroke; and
a processor programmed to increase a frequency of the piston movement, wherein the frequency is based on the partial piston stroke, wherein the processor is further programmed to measure a first time period, wherein the first time period is the time it takes for the piston to complete the partial piston stroke, to compare the first time period to a predetermined time period, and to determine that the pump is not primed when the first time period is below the predetermined time period by a threshold amount of time.
2. The pump of claim 1 wherein the position sensing mechanism utilizes optical encoding.
3. The pump of claim 1 wherein the position sensing mechanism utilizes conductive encoding.
4. The pump of claim 1 wherein the position sensing mechanism comprises a magnetic sensor.
5. The pump of claim 1 wherein the position sensing mechanism measures the capacitance between a stationary conductive element and a conductive element that moves with the piston.
6. The pump of claim 1 further comprising one or more switches configured to monitor the position of the piston by sensing a condition of the one or more switches.
7. The pump of claim 6 wherein at least one of the one or more switches is disposed at a first physical limit of the chamber.
8. The pump of claim 1 wherein the position sensing mechanism is an encoding grid.
9. The pump of claim 8, wherein the encoding grid is disposed on the piston.
10. The pump of claim 8, wherein the encoding grid is disposed on an attachment to the piston.
11. A pump comprising:
a shape memory element coupled to the piston and configured to move the piston from a first position of a plurality of positions to a second position of the plurality of positions of a pumping cycle, wherein when the piston is moved from the first position toward the second position, a fluid is drawn into the chamber and wherein when the piston is moved from the second position toward the first position, the fluid is expelled from the chamber;
a position sensing mechanism that senses a position of the piston including a plurality of positions between the first position and the second position, wherein the position sensing mechanism is configured to detect a fault when the piston does not reach at least one of the first position or the second position upon completing the pumping cycle;
a positioning system configured to move the piston to at least one of the plurality of positions between the first position and second position when the fault is detected, resulting in a partial piston stroke; and
a processor programmed to increase a frequency of the piston movement, wherein the frequency is based on the movement of the piston to the at least one of the plurality of positions between the first position and the second position, wherein the processor is further programmed to measure a first time period, wherein the first time period is the time it takes for the piston to complete the partial piston stroke, to compare the first time period to a predetermined time period, and to determine that the pump is not primed when the first time period is below the predetermined time period by a threshold amount of time.
12. The pump of claim 11 wherein the positioning system includes a linear feedback mechanism.
13. The pump of claim 11 wherein the position sensing mechanism utilizes optical encoding.
14. The pump of claim 11 wherein the position sensing mechanism utilizes conductive encoding.
15. The pump of claim 11 wherein the position sensing mechanism comprises a magnetic sensor.
16. The pump of claim 11 wherein the position sensing mechanism measures the capacitance between a stationary conductive element and a conductive element that moves with the piston.
17. The pump of claim 11 further comprising one or more switches configured to monitor the position of the piston by sensing a condition of the one or more switches.
18. The pump of claim 17 wherein at least one of the one or more switches is disposed at a first physical limit of the chamber.
19. The pump of claim 11 wherein the position sensing mechanism is an encoding grid.
20. The pump of claim 19, wherein the encoding grid is disposed on the piston.
21. The pump of claim 19, wherein the encoding grid is disposed on an attachment to the piston.
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