Abstract: A circularly oscillating saw, used mainly in the surgical field which, while having minimal dimensions, must have a high cutting capacity with an atraumatic cool cut, without running hot itself. The saw provides a direct connection of the saw blade with an eccentric and a suitable bearing approximately in the center between the saw blade tip and the eccentric, which provides a circularly oscillating cutting. The saw allows a cut to take place not only in parallel to the saw blade but in all directions of a plane. In addition, contamination of a wound by lubricants and bearing debris is prevented because of the excellent transport of chips and coolant. Also, the saw is to easily cleaned, sterilized and repaired while the manufacturing of this precision instrument is efficient. An internal cooling protects from the saw running-hot and ensures an optimal coolant supply. Drive-side and output-side sealing devices achieve a hermetic sealing-off of the saw mechanism.

Abstract: An endoscope for resecting tissue inside body cavities, the principal feature of which is that the endoscopic tube contains a shaft carrying a grinding or milling head, which allows precise removal of scar tissue or other fairly firm tissue under endoscopic control without leaving irregular or thermally damaged wound sites.