Surgery – Controlled release therapeutic device or system – Implanted dynamic device or system
Reexamination Certificate
2011-07-19
2011-07-19
Desanto, Matthew F (Department: 3763)
Surgery
Controlled release therapeutic device or system
Implanted dynamic device or system
C604S288040, C604S152000
Reexamination Certificate
active
07981107
ABSTRACT:
Low profile inlet valve embodiments for a piston pump therapeutic substance infusion device are disclosed that reduce dead volume, occupies little residential space, operates rapidly, and have many other improvements. The therapeutic substance infusion device has a housing, a therapeutic substance reservoir, a power source carried in the housing, electronics, a piston pump, and an inlet valve. The piston pump is configured for pumping therapeutic substance from the therapeutic substance reservoir through an infusion port at a programmed rate. The inlet valve is in fluid communication with a reservoir outlet to control the flow of therapeutic substance into the piston pump. The inlet valve has a substantially coplanar valve surface and valve spring. Many embodiments of the low profile inlet valve and its methods of operation are possible.
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Desanto Matthew F
Medtronic Inc.
Mueting Raasch & Gebhardt, P.A.
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