Abstract: Machine tool, comprising a base (1) with a bottom (10) and a peripheral wall (11) of predetermined height to delimit an internal volume of predetermined capacity and open at the top, in which on the upper edge of said wall (11) is placed, removably, a pierced cover (2), or a work-piece carrier surface provided with through holes (20) through which a refrigerant liquid is free to fall, and wherein an electric motor (4), on which is engaged a tool holder (7), is placed in said inner volume, and wherein said electric motor (4) is inserted in a protection chamber (5) which protects it from the refrigerant liquid passing through said holes (20). The electric motor (4) is connected to corresponding lowering and lifting means, by means of which the tool holder (7) is lowered and raised accordingly, so producing the lifting and lowering of a respective tool (3) through the cover (2).

Abstract: A mixer/stirrer motor-reducer (e.g. as part of a mixer, stirrer or similar building machine), includes an electric motor (2) and a reducer (3) kinematically connected to the motor via a gear train (4, 6, 8) and with a relevant output shaft (9) intended for moving a mixing tank (10; 110). The motor-reducer (1) is provided with a box-shaped shell (15) made of insulating material. The shell (15) is open laterally, is able to include the casing (12) of the electric motor (2), is closable by a flange (19) and is made of electrically insulating material and is interposed between the motor (2) and the reducer (3).

Abstract: Improved paddle mixer, including a stationary drum solid to a support frame, with a vertical shaft engaged with a motor-reducer unit and provided with a plurality of transverse arms to each of which at least a paddle is fixedly or otherwise rotatively connected, wherein each of the paddles, being fixed with respect to the relevant support arms, is made up of two like plates disposed at the free end of the corresponding arm and between which a rubber element is interposed so that, by the rotation of the shaft, that is, during the blending of the materials introduced inside the drum, the rubber element provides for scraping the side or respectively bottom wall of the drum.