Medication delivery pen having an improved clutch assembly
AssigneeBecton, Dickinson and Company
InventorsAntonio A. Bendek, John E. Burbank, III, Charles L. Bush, Jr., Jonathan B. Gabel, Lucio Giambattista, Roger W. Hoeck, Malcolm E. Taylor
Life of this patent
Estimating the term…
Abstract
An improved medication delivery pen is provided for injecting fluids such as insulin within body tissue. The medication delivery pen includes a mechanism that prevents the removal of a cartridge unless an injector button on the medication pen is in a predefined position, a bayonet attachment and an improved clutch assembly in a dose setting mechanism that provides improved control over the torque necessary to rotate a units counter ring in the medication delivery pen using a dose setting knob.
Claims7
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.
Dependencies are inferred from the claim text.