Surgery – Controlled release therapeutic device or system – Implanted dynamic device or system
Reexamination Certificate
2007-08-14
2007-08-14
DeSanto, Matthew (Department: 3763)
Surgery
Controlled release therapeutic device or system
Implanted dynamic device or system
C604S152000
Reexamination Certificate
active
10331187
ABSTRACT:
A piston-type drive mechanism in combination with a positive pressure reservoir for delivery of infusion medium. A coil capable of being electrically activated to provide an electromagnetic field. The coil surrounds a piston channel extending in an axial direction. The piston channel provides a passage for communication of infusion medium from the positive pressure reservoir to an outlet chamber. A piston is located within the piston channel and is moveable axially within the channel to a forward position. The piston is moved toward a retracted position, when the coil is not energized. As the piston is moved to its forward position, pressure moves a valve member into an open position. When the valve member is in the open position, medium from the piston chamber is discharged into the outlet chamber. An outlet is provided in flow communication with the outlet chamber, for discharging infusion medium from the outlet chamber.
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EP Search Report as issued in European Patent Application No. 03796554.8-2310, Mailing date: Feb. 14, 2006.
Bosley Robert W.
Gray John
DeSanto Matthew
Foley & Lardner LLP
Medtronic Minimed Inc.
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