DRUG DELIVERY DEVICE WITH COMPRESSIBLE FLUID CHAMBERS
First Claim
1. A drug delivery device comprising:
- housing walls;
a compressible dispensing chamber containing a drug fluid having t first outlet and an enclosed first base, said compressible dispensing chamber being situated inside a first compartment supported by the housing walls with the first base attached to a plunger; and
a driver for imparting forward and backward movements of the plunger, said forward movement for moving the drug fluid toward the first outlet.
1 Assignment
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Accused Products
Abstract
A drug delivery device utilizing compressible fluid chambers for actuation is disclosed. The device includes a compressible dispensing chamber situated in a first compartment and a compressible filler-fluid chamber in flow communication with the first compartment. The compressible dispensing chamber is attached with a reciprocating plunger for dispensing the drug fluid. The drug chamber is refillable with a refill container that uses a compressible pouch containing the refill drug fluid. The refilling process is failsafe enabled by the insertion of the refill container needle only at the correct position to activate an internal contact switch. The compressible-wall configurations enable low dispensing forces without leakage of the drug fluid.
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Citations
15 Claims
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1. A drug delivery device comprising:
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housing walls; a compressible dispensing chamber containing a drug fluid having t first outlet and an enclosed first base, said compressible dispensing chamber being situated inside a first compartment supported by the housing walls with the first base attached to a plunger; and a driver for imparting forward and backward movements of the plunger, said forward movement for moving the drug fluid toward the first outlet. - View Dependent Claims (2, 3, 4, 6, 7, 11, 12, 13)
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5. A refill system of an implantable drug delivery device comprising:
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an implantable drug delivery device having a compressible dispensing chamber containing a drug fluid having a first outlet and an enclosed first base, said first base being attached with a plunger and the first outlet having collapsible wails forming a outlet flow channel; a refill container having a compressible drug chamber containing the drug fluid and a needle with an injection opening; and a drive means for imparting forward and backward movements of the plunger, said forward movement for moving the drug fluid toward the first outlet and said backward movement draws the drug fluid from the refill container into the dispensing chamber when the needle is inserted into the first outlet to pinch on said collapsible walls to block the outlet flow channel. - View Dependent Claims (8, 9, 10, 14, 15)
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Specification