Patent ID: 7918824

Claim:
A pharmaceutical delivery device comprising: a housing having a first end and a second end spaced in an axial direction; a pharmaceutical containing needled syringe mounted within said housing to be movable in said axial direction from a first position to a second position, wherein an injection tip of a needle of said needled syringe is recessed within said housing when in said first position and projects from said housing beyond said first end when in said second position; a syringe advancing assembly operable to automatically advance said needled syringe from said first position to said second position; and a plunger including an input portion projecting from said housing for manual access by a user, wherein said plunger is operable by the user directly shifting said input portion when said needled syringe is disposed in said second position to inject pharmaceutical from said needled syringe through said needle at a rate adjustably controlled by the user during said injection, wherein said plunger includes a plunger extender automatically movable within said housing from a first location to a second location upon said needled syringe advancing from said first position to said second position, wherein said plunger extender, when in said second location, occupies a space vacated by said needled syringe during advancement from said first position to said second position, whereby said plunger input portion remains stationary relative to said housing during said advancement of said needled syringe; wherein said syringe advancing assembly comprises a trigger disposed on a distal end of said plunger input portion and axially depressible relative to said input portion to actuate said syringe advancing assembly; and wherein said syringe advancing assembly comprises a lock member axially fixed within said housing, and an insertion member rotatably fixed within said housing and releasably engaged with said lock member, said lock member being angularly shiftable by said trigger during the depressing of said trigger to release said insertion member to allow a biasing member to shift said insertion member axially in a proximal direction to drive said needled syringe from said first position to said second position.