CA2359375A1 — Injection device

USPTO Abstract

The invention relates to an injection device comprising a container (80) whi ch receives a cartridge (52) which contains an injection fluid (53) and to whos e proximal end an injection needle (76) can be fixed. The container (80) can b e displaced in a housing (50, 48, 46, 36) between a proximal and a distal terminal position. A plunger (108) for expelling injection fluid (53) from t he cartridge (52) is arranged in the housing and guided in a guide member (124) such that during injection it can be axially displaced but not rotated in relation to the housing. The plunger has an external thread (159) which is guided in an inner thread (152) of an adjustment member (151) serving to control the injection dose. Between the container (80) and the plunger (108) a frictional engagement coupling (162, 250) is provided for which in the manne r of a slipping coupling serves to transmit at least part of an axial movement of the plunger (108) to the container (80).