Device for displacing piston in container holding injectable product comprises drive element for effecting two displacement stages against different resistances via threaded sleeve and spindle systems

摘要

Device comprises a drive element (30) for effecting displacement stages (10, 20) via threaded sleeve and spindle systems (20a, 30i; 10a, 20i). After one of two displacement stages is completed over a specified distance, further displacement in the same direction is effected against at least sectionally higher resistance so that the second displacement stage is also effected.