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US 2017/0290981 A1Published application
Drug Delivery Device with Piston Driver Distal Feature
AssigneeNovo Nordisk A/S
InventorsJesper HOEHOLT, Jens Aage MUNK
Life of this patent
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Abstract
Drug delivery device adapted to receive a cartridge, comprising drug expelling means with a piston driver comprising a distal end adapted to abut and axially move the piston of a loaded cartridge to thereby expel an amount of drug from the cartridge, and a motor assembly for moving the piston driver. The piston driver distal end comprises flexible centring means adapted to frictionally engage a cartridge inner surface proximally of the piston, thereby centring the cartridge and the piston driver distal end relative to the each other.
Claims8
A drug delivery device comprising:
- a compartment adapted to receive and hold a drug-filled cartridge, the cartridge comprising an outlet, a generally cylindrical proximal portion and an axially displaceable piston in sliding engagement with the cartridge inner surface,
- drug expelling structure comprising:
- a piston driver comprising a distal end adapted to abut and axially move, directly or indirectly, the piston of a loaded cartridge to thereby expel an amount of drug from the cartridge through the outlet, and
- a motor assembly for moving the piston driver,
- wherein the piston driver distal end comprises flexible centering structure adapted to frictionally engage a cartridge inner surface proximally of the piston, thereby centring the cartridge and the piston driver distal end relative to the each other.
2 more elements
Dependencies are inferred from the claim text.