Abstract: The saw blade has a non-cutting blade area (2), whose thickness D is smaller than the width of cut S of its cutting area (4). The non-cutting blade area (2) has on either side a thin surface coating (11) of a relatively soft and biologically neutral precious metal. This leads to much better cutting characteristics and to reduced friction. The saw blade is particularly suitable for bone surgery.

Abstract: The present invention relates to a saw blade in which the teeth of the blade are not set and in which the saw blade on each side face has a shallow section formed by etching which at the location of the teeth extends over a part of the height of the teeth.

Abstract: The present invention relates to an electrical bell type motor for driving a surgical tool, with a stator comprising a magnet having the shape of a circular cylinder and a rotor comprising a wire coil of lacquered wire forming a hollow circular cylinder, and a rotor carrier plate made of antimagnetic stainless steel fixed to a rotatable shaft carrying the wire coil. The wire coil at its one front end is fixed to the rotor carrier plate and the other end is self-supporting.

Abstract: The present invention covers a saw blade having a row of teeth with a unique arrangement along its edge and the blade has at least one closed aperture which extends in the direction away from the row of teeth, wherein the part of the saw blade between the row of teeth and the aperture comprises a strip-like element.

Abstract: The present invention relates to a manual tool device, preferably used for surgical operations on bones, of longitudinal shape and to a method for making the same, the device assembly and arrangement, in particular the gearing section by which the driving force of an electrical motor is operatively transmitted to the tool through a gearing mechanism, and the weight of the device provides a well balanced device that is easy to work with in a highly precise manner. The method to produce the manual device represents a simple and rational way of manufacture.

Abstract: A separating device for manually making separations in solid materials in which a separating blade has a row of teeth that performs oscillating movements with a component directed parallel and a component vertical to the row of teeth in which the amplitude is not greater than twice the distance of neighboring teeth.

Abstract: A surgical bone operation instrument that has a straight tube-shaped shaft and arrangement coaxially in relationship to the longitudinal axis of the instrument to form a continuous channel from one end of the instrument to the other including the end parts, which serves for the guidance of materials utilized in the operation of the instrument, and a driving assembly being of a bell-type electrical motor with the stator enclosed within the bell-shaped rotor, the latter having windings of lacquered wire embedded in a plastic material, the windings further being wound to form a hollow cylinder of relatively thin wall thickness to form a part of the bell-shaped rotor, the mechanical structure of the rotor being furthermore reinforced by glass fibers.