Bone cement applicator with retractable mixing rod and method for production of a bone cement

摘要

#$%^&*AU2019203699A120200116.pdf#####Bone cement applicator with retractable mixing rod and method for production of a bone cement Abstract The invention relates to a bone cement applicator comprising a cartridge (1) with an internal space (11), whereby the cartridge (1) comprises, on a front side, a cartridge head (6) with a dispensing opening for expulsion of the bone cement (48) from the internal space (11), and whereby the cartridge (1) comprises a thread (8) on a rear side situated opposite from the front side of the cartridge (1), a dispensing plunger (12), whereby the bone cement powder (4) is contained between the dispensing plunger (12) and the cartridge head (6) in the internal space (11) of the cartridge (1); a threaded tube (9) that is arranged at the rear side of the dispensing plunger (12) that faces away from the cartridge head (6), whereby the threaded tube (9) comprises a counter thread (45) matching the thread (8) on the rear side of the cartridge (1) and the counter thread (45) of the threaded tube (9) engages the thread (8) on the rear side of the cartridge (1), and whereby the dispensing plunger (12) is arranged such as to be mobile in the internal space (11) of the cartridge (1) along the cylinder axis of the internal space (11) in the direction of the cartridge head (6) by screwing the threaded tube (9) into or onto the cartridge (1); a receptacle (2), whereby the receptacle (2) is plugged into the threaded tube (9) on a rear side of the threaded tube (9) that is opposite from the dispensing plunger (12), and is mobile in the threaded tube (9); and a mixing rod (7), whereby the mixing rod (7) with a mixer (10) fastened to it is arranged in the internal space (11) of the cartridge (1), whereby the mixing rod (7) is connected, on a side opposite from the mixer (10), to a front side of the receptacle (2) that faces the dispensing plunger (12), whereby the mixing rod (7) is guided through a feedthrough in the dispensing plunger (12) and is supported in the feedthrough such as to be axially mobile, and whereby the mixing rod (7) is connected to the receptacle (2) such as to be detachable, and the mixing rod (7) detached from the receptacle (2) can be pushed into the receptacle (2), when the receptacle (2) is being propelled in the direction of the cartridge head (6). The invention also relates to a method for production of a bone cement using said bone cement applicator. (Figure 1)1 /8 28 18 23 24 26 2 15 5 20 L-------21 3 2 27 30 36 45 45 3 7 13 8 1 32 32 14 -- 12 10 -1 11 1 1 4 43 3 38 Fig. 1