Patent ID: 6096010
Filing Date: 2000-08-01
Classification: A61M

Abstract:
A medication delivery pen comprising:a pen-needle assembly;a vial retainer including a vial containing a medication to be delivered and having said pen-needle removably attached to a distal end;a housing having said vial retainer mounted to a distal end and including;a dose control mechanism for setting a desired dose to be delivered from the vial;a drive mechanism for dispensing the desired dose from the vial when in an armed condition;means for arming said drive mechanism into the armed condition; andmeans for indicating whether said drive mechanism is in the armed position;wherein said dose control mechanism includes a dose knob and a dose barrel, andwherein said means for arming said drive mechanism arms said drive mechanism when said dose knob is pulled a predetermined distance out of said housing, said arming means including:a sliding sleeve slidably mounted on said dose knob having a distal edge and a detent on an outer surface; anda shoulder on a proximal side of said dose barrel that contacts said distal edge of said sliding sleeve to push said sliding sleeve out of the proximal end of a pawl assembly on said housing and into the armed position.