1. Device (1) for moving the piston inside the cartridge having a housing (2) of the cartridge and the piston (3) mounted therein for movement along the longitudinal axis (Z) of the housing (2) of the cartridge, wherein the device (1) comprises: - a first portion (4) having first connection means (5) for removably housing the compound (2) of the cartridge with a first portion (4) so that in both directions of the longitudinal axis (Z) of the housing (2) of the cartridge has a fixed connection and / or a frictional connection between the housing (2) of the cartridge and the first part (4), - a second part (6) having second connection means (7, 11a, 11b, 12 7, 12, 17a, 17b) for releasably piston compound (3) of the cartridge with the second part (6) in such a way that in both directions of the longitudinal axis (Z ) of the housing (2) of the cartridge has a fixed connection and / or friction fit between the piston (3) and a second part (6), wherein the first (4) and the second part (6) are movable relative to each other for at intended use device (1) moving at least forward of the piston (3) connected with the second part (6), inside the body (2) of the cartridge connected with the first part (4) along the longitudinal axis (Z) of the housing (2) of the cartridge, and wherein the second connection means (7, 11a, 11b, 12 7, 12, 17a, 17b) are formed so that the establishment and disconnection of the fixed connection and / or friction joint with the piston (3), their shape can be reversibly izmenena.2. The apparatus according to claim 1 for use in filling a cartridge having a housing (2) of the cartridge and the piston (3) disposed therein to be movable along the longitudinal axis (Z) of the housing (2) of the cartridge, liquid pre
