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Injection device

  • US 20040092877A1
  • Filed: 09/15/2003
  • Published: 05/13/2004
  • Est. Priority Date: 03/27/2001
  • Status: Active Grant
First Claim
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1. A drive mechanism for an injection device in which a piston is successively moved in relation to a first end of a medicament cartridge containing a medicament selectively to drive a bung closing a first end of the medicament cartridge into the medicament cartridge to expel medicament through a delivery member located at a second end of the medicament cartridge, in which the drive mechanism comprises a piston member, a semi rigid belt connected at a first end to the piston member, a belt drive means to drive the semi rigid belt and a dose setting mechanism to control the driving of the semi rigid belt is characterised in that the belt drive means comprises a first cable means connected at a first end to a second end of the semi rigid belt and at a second end to a first spool.

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