Abstract: A mobile accommodation vehicle having a first free flow opening enabling free air flow between the inside and the outside of the vehicle and a second free flow opening also enabling free air flow between the inside and the outside of the vehicle. The first free flow opening is arranged higher than the second free flow opening in the vehicle. The first free flow opening or the second free flow opening is provided with heat recovery ventilation means which is arranged to enable free air flow through the heat recovery ventilation means, when the heat recovery ventilation means is not in operation.

Abstract: Disclosed is a mobile accommodation vehicle (1) comprising a first free flow opening (2) enabling free airflow between the inside and the outside of the vehicle and a second free flow opening (3) also enabling free airflow between the inside and the outside of the vehicle, wherein the first free flow opening (2) is arranged higher than the second free flow opening (3) in the accommodation vehicle (1). The first free flow opening (2) or the second free flow opening (3) is provided with heat recovery ventilation means (4) and the heat recovery ventilation means (4) is arranged to enable free air flow through the heat recovery ventilation means (4), when the heat recovery ventilation means (4) is not in operation or the heat recovery ventilation means (4) is provided in a third free flow opening (5) if passage through the heat recovery ventilation means (4) is blocked or at least substantially reduced when the heat recovery ventilation means (4) is not in operation.

Abstract: A hydraulic steering arrangement with a steering handwheel which is connected with a hydraulic steering unit, and with a steering motor connected with a pump via a steering valve. In a steering arrangement of this kind, a simple construction is desired, though under maintenance of the required security. For this purpose, the steering valve can optionally be operated by a steering handwheel or by a hydraulic pressure generated by a control pressure generator.

Abstract: The invention concerns a steering arrangement (1) with a steering handwheel (2), which is unrotatably connected with a steering sensor, and with a wheel (3) steered by a steering drive (4) without a mechanically active connection between steering handwheel (2) and steered wheel (3). In this steering arrangement a simple way of realizing a counter action of the steered wheel on the steering handwheel (2) is wanted. For this purpose the steering sensor is made as an electrical machine (6), which works as a generator, for the production of a steering signal and is connected with a switching device (9), whose load behavior is variable.

Abstract: Hydraulic steering arrangement (15) with a steering handwheel (2), which is connected with a manual. pump (3), a pump (18) supplying hydraulic fluid, a steering motor (12) and a steering valve (15) arranged between pump (18) and steering motor (12) and having a valve element (20) steering the flow of hydraulic fluid between the pump (18) and the steering motor (12), the valve element (20) being displaceable by hydraulic pressures originating from the manual pump. In such a steering arrangement it is wanted to create the opportunity of implementing various functions, without having to abandon the ordinary hydraulic control. For this purpose, the valve element (20) has an additional drive (31).

Abstract: The invention concerns a compact drive with an electric motor, a frequency converter and a gear. Such a drive should be made in the most compact way possible. For this purpose frequency converter is arranged at one front end of the motor and the gear is arranged at the other front end of the motor.