Abstract: In a saw for surgical purposes comprising a saw blade holder movable by a motor and a saw blade fixable in the saw blade holder, to enable insertion and removal of the saw blade without a tool, it is proposed that the saw blade holder comprise an insert guide for the saw blade with a holdback projection, that the saw blade carry a resilient detent projection which in a relaxed position, with the saw blade inserted in the insert guide, engages the holdback projection from behind, and that an actuating element be mounted on the saw blade holder for displacement against the resilient detent projection, the actuating element moving the resilient detent projection, during the insertion, into a tensioned position in which the detent projection is pushable past the holdback projection when the saw blade is pulled out of the saw blade guide.

Abstract: In a striking tool for surgical instruments with a sleeve-shaped gripping part, a tool holder which is slidingly displaceable in the latter in the longitudinal direction thereof, and an oscillatingly driven piston which is slidingly displaceable in the gripping part in the longitudinal direction thereof and has two striking surfaces which strike corresponding contact surfaces of the tool holder and thereby act upon the latter with impulses acting in opposite directions, to enable selective generation of blows in the striking direction and in the pulling-out direction without converting the tool, it is proposed that the actual stroke of the piston in the gripping part be limited such that is it smaller than the double-strike stroke which the piston would have to cover, with the tool holder held firmly in the gripping part, from the striking of the first striking surface against the contact surface to the striking of the second striking surface against the second contact surface, and that the tool holder be mou