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Medication delivery pen having an improved clutch assembly

  • US 5,921,966 A
  • Filed: 08/11/1997
  • Issued: 07/13/1999
  • Est. Priority Date: 08/11/1997
  • Status: Expired due to Term
First Claim
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1. A medication delivery pen comprising:

  • a housing having a distal end and a proximal end;

    a cartridge retainer for receiving a cartridge containing medication, said cartridge retainer being removably mountable on the distal end of said housing;

    means in said housing for setting a desired dose of medication to be dispensed from the cartridge having a rotatable dose setting knob and a dosing ring that displays the amount of the desired dose being set;

    means in said housing for dispensing the desired dose of medication from the cartridge; and

    means in said dose setting means for controlling torque applied by said rotatable dose setting knob to said dosing ring during rotation of said dosing knob including a clutch having a clutch detent spring attached to said dosing ring and rotatable mounted to said dose setting knob to rotate within said dose setting knob when a predetermined torque is applied to said dose setting knob.

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