Abstract: An assisted power steering system and a method for assisting a turning of a steered wheel of a steering system comprising an energy source arranged to assist the turning of the steered wheel, a sensor arrangement arranged to detect direction of the turning, and a control unit arranged to control the energy source based on data from the sensor arrangement, wherein the sensor arrangement comprises at least one first digital sensor arranged to indicate the direction of the turning.

Abstract: Arrangement at tiller truck, at which the communication between the handle and the truck itself is done via a serial connection, for instance a serial cable (31) between a logic unit in the handle and a logic unit in the truck itself. A drive control (7, 8) includes a number of Hall-sensors (19) that are successively activated by a magnet (17) that is in turn mechanically activated, so that via a logic circuit a varied drive current is fed to the drive motor. The Hall-sensors (18) are arranged on a circuit card 19 that also include logic circuits. A safety control (belly button) (9) that is arranged on the handle. If the belly button is depressed this is on an inward protruding arm (21) provided with a magnet 22 that at this movement is moved so that it will influence one or several Hall elements belonging to the drive control (7, 8), at which however the magnet (22) is on the other side of a circuit card (20) that carries the Hall elements.

Abstract: In order to increase safety of lift trucks, a weight indication for the driver is provided so that the driver may know how heavy a load he is handling,. This weight indication is obtained by measuring the current to the motor of the hydraulic pump. In order to eliminate the risk that monetary variations may result in faulty measurements preferably a mean value of current is taken for a certain time or the value of the measured current is added during a fixed time interval. Obtained values are then multiplied by a conversion factor so that the weight in, for instance, kilograms is obtained and delivered to a suitable display device. Obtained values also may be used to provide a warning by sound or light should the load exceed the maximum allowed.