Surgery – Controlled release therapeutic device or system – Implanted dynamic device or system
Reexamination Certificate
2011-01-11
2011-01-11
Desanto, Matthew F (Department: 3763)
Surgery
Controlled release therapeutic device or system
Implanted dynamic device or system
C604S132000, C604S288020
Reexamination Certificate
active
07867221
ABSTRACT:
A medical device and displacement-based over-pressurization mechanism (OPM) for use with the same. The OPM may be positioned in or along a refill passageway of the device. It may include a valve plunger having a portion in biased, abutting contact with a reservoir surface that moves as the reservoir volume changes. The reservoir surface may move between a full position and a refill position. The OPM is preferably configured to close and occlude the refill passageway when the reservoir and reservoir surface reach the full position, e.g., before reaching an overfill position. A sensor may also be provided to detect a position of the valve plunger.
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Desanto Matthew F
Medtronic Inc.
Mueting Raasch & Gebhardt, P.A.
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