Abstract: A filtering device, allowing to provide an effective filtering without either requiring particular efforts to the user or imposing him or her to operate in excessively hard positions, comprises a filtering element comprised between a first and a second supporting surface, the distance between the supporting surfaces being adjustable, so as to compress the filtering element by moving the supporting surfaces the nearer the other, and actuating device apt to modify the distance of the supporting surfaces. The actuating device is selectively connectable to a surface of the supporting surfaces in a such way that the actuating device can alternatively move unrelated to motion of the surfaces so as to be placed in an operative configuration or move integral to the surface so as to modify the distance between the surfaces in order to compress the filtering element.

Abstract: A whirlpool bathtub (1) comprises a plurality of units (2) for generating flows of water and/or air in the tub (1); each unit (2) comprising, attachable to a wall (1a) of the tub (1) with a through hole, at least: a flow generating chamber (3) with a water passage/feed opening (4), an impeller (5) for generating flows and a nozzle (6), delimiting the chamber (3), and designed to allow the directional outfeed of the flow towards the inside of the tub (1); impeller (5) drive means (7), connected to the impeller by a transmission shaft (8), and located on the outside of the wall (1a); means (9) for supplying air to the chamber (3) which are connected to the chamber (3) and designed to allow the air to be mixed with the water which can be carried into the chamber (3).

Abstract: A hydraulic pump with permanent-magnet motor having a preset direction of rotation, comprising a permanent-magnet motor connected to an impeller with curved vanes which is rotatably accommodated in a volute. The volute is predominantly symmetrical with respect to a line being directed toward an intake port and passing through a rotation axis of the impeller.

Abstract: The method and the corresponding device allow to start a synchronous motor with the chosen rotation direction, with a very high static torque, without requiring any modification of the structure of the synchronous motors currently in use, by means of an adapted electronic circuit managed by a microprocessor.