Patent ID: 7066907

Claim:
An injector device for containing and operating a syringe having an elongate dose-containing capsule ( 1 ) with a needle ( 2 ) projecting from a forward end thereof and a plunger ( 3 ) from a rear end thereof, the device comprising: a first spring ( 13 ) initially in a compressed energized state at a rear end of the device held by a trigger ( 18 ), and a second spring ( 12 ) initially not fully energized and surrounding the capsule ( 1 ), wherein operation of the trigger ( 18 ) releases the first spring ( 13 ) which first expands and moves the syringe forwardly and secondly, when the syringe reaches a needle projecting position, moves the plunger ( 13 ) forwards relative to the capsule ( 1 ) to eject the dose, wherein the second spring ( 12 ), fully compressed by this action, then exerts itself to retract the syringe and its needle, and wherein the device has an integrally moulded two-part body ( 6 , 7 ) formed in an open state, the trigger ( 18 ) also being part of the integral moulding, and in that the body is closed and secured around a dose filled syringe in the retracted position and the first and second coil springs ( 13 , 12 ).