Abstract: A cutting knife is provided for a cutting tool for severing cement beads of window panes that are cemented in motor vehicles. The cutting knife is formed from a flat material which is bent into the shape of an U. The knife comprises a cutting portion forming one leg of the U, a securement portion forming the other leg of the U, and an intermediate bridge that connects the cutting portion with the securement portion. The securement portion is provided at its free end with an opening for securing the knife to an oscillatory drive unit of the cutting tool and tapers from this securement opening toward the intermediate bridge. In one embodiment, the securement portion is provided with a curved section at the end adjacent the intermediate bridge. In another embodiment, the cutting portion has a cross-section with a central section that is defined by two parallel surfaces. A serrated or saw-like cutting edge is preferably provided on the cutting portion.

Abstract: A motor-driven machine with variable torque setting includes a motor, a planetary gearing driving a work spindle and a rotatably mounted internal gear actuating a motor de-energizer against the action of a spring force when a settable limit torque is exceeded. To achieve a compact design, a torsion spring element extending in the axial direction alongside the planetary gearing is provided for generating the spring force. The torsion spring element carries a swivel element at one end which engages a cam on the internal gear and is held at an opposite end in a support so that the swivel element can swivel out of an initial position against the action of the force of the torsion spring element to de-energize the motor.