Patent ID: 8512296

Claim:
An injection device comprising: a housing ( 42 , 52 ) to which a container ( 34 ) having injection fluid ( 32 ) is connectable; a first element ( 94 ) for ejecting injection fluid ( 32 ) from such a container ( 34 ), which first element ( 94 ) is shaped with an external thread ( 92 ); a metering element ( 66 , 88 ; 166 ) that is arranged rotatably relative to the housing ( 42 , 52 ) and has an internal thread ( 90 ) that is in engagement with the external thread ( 92 ) of the first element ( 94 ), which metering element ( 66 , 88 ; 166 ) is rotatable, together with the first element ( 94 ), relative to the housing ( 42 , 52 ) for preselection of an injection dose; and a coupling arrangement which is implemented to block, during an injection operation, a rotation of the first element ( 94 ) relative to the housing ( 52 ) but to enable a rotation of the metering element ( 66 , 88 ; 166 ) relative to the housing ( 42 , 52 ), so that, by means of such a rotation of the metering element ( 66 , 88 ; 166 ) during an injection operation, an axial displacement of the first element in a proximal direction, toward the patient, is performed, in order to eject injection fluid ( 32 ) from such a container ( 34 ).