Medical device

  • US 6,582,408 B1
  • Filed: 07/08/1999
  • Issued: 06/24/2003
  • Est. Priority Date: 07/08/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A medication delivery device comprising:

  • a cartridge assembly comprising a cartridge having a pierceable seal at one end and a moveable stopper at an opposite end;

    a dosage assembly comprising a plunger means for acting on the stopper;

    a mechanism for setting a specified dose; and

    a drive means for advancing the plunger means to deliver the specified dose;

    a needle assembly;

    a first coupling means for coupling and uncoupling the needle assembly to and from the cartridge assembly;

    a second coupling means for coupling and uncoupling the cartridge assembly to and from the dosage assembly;

    wherein the first coupling means comprises a snap lock; and

    wherein the second coupling means is selected such that when a user grasps the needle assembly and applies a force to couple it to and to uncouple it from the cartridge assembly, while simultaneously grasping the dosage assembly and applying an equal but opposite force thereto, the cartridge assembly cannot not move axially with respect to the dosage assembly.

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