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US 8,771,239 B2Granted
Drive mechanisms suitable for use in drug delivery devices
AssigneeSanofi-Aventis Deutschland GmbH
InventorsMalcolm Boyd, Richard Letham, David Plumptre, Robert Veasey, James May
Life of this patent
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Abstract
The present invention relates to drive mechanisms suitable for use in drug delivery devices, in particular pen-type injectors, wherein a number of pre-set doses of medicinal product can be administered. In particular, the present invention relates to such drug delivery devices where a user may activate the drug delivery device.
Claims11
A drive mechanism for use with a delivery device, the drive mechanism comprising:
- a rack that is moveable in a proximal direction and in a distal direction;
- a piston rod coupled with said moveable rack, said piston rod comprising a first plurality of indentations along at least a portion of said piston rod;
- and
- a rotating component engaged with said movable rack such that it transfers movement between said movable rack and said piston rod,
- said rotating component releasably engaged with said first plurality of indentations of said piston rod, and
- a carrier releasable engaged with said piston rod, said carrier allowing relative movement between said rotating component and said piston rod.
3 more elements
Dependencies are inferred from the claim text.