Changeable changeover head for puncture instrument, has locking ring, cover, sealing ring and floating ring, whereby locking ring is provided with separation plate on its upper side, in whose center opening is available

摘要

Changeable changeover head (20) has a locking ring (21), cover (22), a sealing ring (23) and a floating ring (24). The locking ring is provided with a separation plate (211) on its upper side, in whose center an opening (212) is available. The cover places on the upper area of the locking ring and an upper plate (221) is provided in its central position, in whose center an opening (222) is available. An appropriate distance is formed between the separation plate of the locking ring and the upper plate of the cover for receiving the sealing ring, whereby a floating ring is arranged at the outer circumference of the sealing ring, whose outer diameter corresponds to the inner diameter of the cover and inner diameter to the outer diameter of the sealing ring and by which the position of the sealing ring is maintained in the center.