Dose setting limiter

  • US RE41,956 E1
  • Filed: 05/04/2005
  • Issued: 11/23/2010
  • Est. Priority Date: 09/16/1999
  • Status: Expired due to Term
First Claim
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1. A limiting mechanism that prevents setting of a dose that exceeds the injectable amount of liquid left in a cartridge of an injection device wherein a dose is set by rotating a dose setting member relative to a driver and away from a fixed stop in the injection device, and the dose is injected by rotating pressing an injection button which rotates back the dose setting member which during this rotation carries the driver with it to rotate this driver which moves the piston rod forward, wherein the driver is provided with a track having a length which is related to the total injectable amount of medicament in the cartridge and which track is engaged by a track follower coupled to the dose setting member to follow rotation of this dose setting member and wherein the driver is disk shaped and the track has a spiral shape which is engaged by the track follower which is flexibly coupled to the dose setting member so that the track follower can be moved radially when it follows the track of the driver element.

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