Patent ID: 8075515

Claim:
A disposable injector comprising: a hollow pot-shaped housing ( 10 ), in which or on which—respectively at least in certain areas—at least one mechanical spring-energy storage ( 50 ), 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, the spring-energy storage ( 50 ) includes at least one pre-stressed spring-loaded element and 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 has at least one compression bar ( 21 ) having a fixed end and a free end, the at least one compression bar ( 21 ) either operably affixed to the housing ( 10 ) at the fixed end thereof via a spring-loaded element ( 52 ) for forcing normally radially outwardly the at least one compression bar ( 21 ) at the free end, or formed monolithically as part of the housing ( 10 ) and having a sprung-elastic flexional beam ( 28 ) which is self-biased in a radially outward direction, the compression bar ( 21 ) in the region of its free end having at least one support surface ( 23 ),—the piston-actuating plunger ( 60 ) rests on the least one support surface ( 23 ),—the actuating unit ( 80 ) has a locked position ( 8 ), the actuating unit ( 80 ) in the locked position ( 8 ) operatively arranged to laterally secure the at least one compression bar ( 21 ),—at least one sealing cap ( 120 ) in sterile sealing relationship with the at least one cylinder-piston unit ( 100 ), the actuating unit ( 80 ) in the locked position ( 8 ) in secure resting relationship with sealing cap ( 120 ), and—the actuating unit ( 80 ) has a triggering position ( 9 ), the actuating unit ( 80 ) in the triggering position ( 9 ) in receptive relationship with the at least one compression bar ( 21 ) to effect lateral retreat of the at least one compression bar ( 21 ) when the piston-actuating plunger ( 60 ) is released.