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Drive mechanisms suitable for use in drug delivery devices

DC CAFC
  • US 9,604,009 B2
  • Filed: 06/30/2014
  • Issued: 03/28/2017
  • Est. Priority Date: 03/03/2003
  • Status: Expired due to Term
First Claim
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1. A drive mechanism for use in a drug delivery device comprising:

  • a housing;

    a dose dial sleeve having a first end, a second end, and an outer surface, where the outer surface has a helical thread engaged with the housing, and the second end has an inwardly directed flange;

    a dose dial grip connected and rotationally fixed to the second end through connection with the inwardly directed flange;

    a drive sleeve releasably connected to the dose dial sleeve;

    a piston rod engaged with the drive sleeve; and

    a clutch located between the dose dial sleeve and the drive sleeve.

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