Patent ID: 8070713

Claim:
A disposable injector comprising: a housing ( 10 ), in which or on whichâ€”respectively at least in certain areasâ€”at least one mechanical spring-energy storage, at least one cylinder-piston unit ( 100 ) which can be filled at least occasionally with active ingredient, at least one piston-actuating plunger ( 60 ) and at least one actuating unit ( 80 ) are arranged, a spring-energy storage ( 50 ) includes at least one pre-stressed spring element, at least part of the piston-actuating plunger ( 60 ) is positioned between the spring-energy storage ( 50 ) and a piston ( 111 ) of the cylinder-piston unit ( 100 ), the housing ( 10 ) has at least one draw hook ( 21 ) having at least one support surface ( 23 ) respectively in the region of its free end, the piston-actuating plunger ( 60 ) rests on the support surface ( 23 ), the piston actuating plunger ( 60 ) has a longitudinal central bore ( 68 ) and the plunger ( 60 ) has a plunger disc ( 73 ) proximate one end thereof, the actuating unit ( 80 ) includes a compression rod ( 65 ) having a shaft ( 66 ) in slideable relationship with the bore ( 68 ), two pendulum rods ( 67 ) are articulated on or proximate the lower end of the shaft ( 66 ), at least a part of the actuating unit ( 80 ) including the compression rod ( 65 ) and the pendulum rods ( 67 ) are guided and supported in the piston-actuating plunger ( 60 ), and wherein the actuating unit ( 80 ) has an actuating position ( 9 ) which causes lateral outward pushing of the at least one draw hook ( 21 ) for releasing the piston-actuating plunger ( 60 ).