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DRIVE MECHANISM FOR A DRUG DELIVERY DEVICE

  • US 20120071836A1
  • Filed: 04/20/2010
  • Published: 03/22/2012
  • Est. Priority Date: 04/30/2009
  • Status: Abandoned Application
First Claim
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1. Drive mechanism for a drug delivery device for dispensing of a dose of a medicinal product, comprising:

  • a holder for a product-containing cartridge, the cartridge having a piston slidably arranged therein in an axial direction,a piston rod to be operably engaged with the cartridge'"'"'s piston for dispensing of a dose of the medicinal product,at least one adjusting member displaceably arranged in axial direction relative to the piston and/or relative to the piston rod for eliminating axial clearance between the piston and the piston rod, wherein the adjusting member is attached to a proximal end of the piston or is pre-assembled to a distal portion of the piston rod and further comprises a receptacle to receive a distal portion of the piston rod,an interlock means adapted to interact with the adjusting member for locking the piston rod'"'"'s distal portion in place at an arbitrary position inside the adjusting member'"'"'s receptacle.

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