Abstract: Foldable link rod system to be placed on a travelling frame comprises pivotally suspended link rods (16, 18) for raising and lowering an operation platform (14). A rotating stool (20) constitutes the connection between two link rods (16 and 18) which are placed in continuation to each other. The one part of the rotating stool (20) is linked to the free end of the first link rod (16) which at its opposite end is pivotally linked to a swinging rod system (26, 28, 30, 32). The second link rod (18) is linked to the other part of the rotating stool and at its other end it is linked to the operation platform (14). The two link rods are pivotal by means of each of their swinging devices (54-70) which are supported on the travelling frame (10, 12) and the rotating stool (20), respectively.

Abstract: A plant for de-icing especially surfaces of aeroplanes, comprising the use of at least two sources (10, 12) of liquid media that are different from each other and capable of being sprayed separately or as a mixture, comprising a number of positive liquid pumps (16, 22) corresponding to the number of media, which pumps all have the same capacity or a predetermined interrelated capacity ratio and terminate in a common spray pipe (24). The connection of the liquid pumps to the sources includes at least one of the sources to at least one of the liquid pumps. In a hydraulic system comprising hydraulic motors (56, 52) for driving the liquid pumps (16, 22) at least two of motors are connected to a common hydraulic pressure pump (32) controlled by way of pressure compensation (33) to work with at least two pressure stages subject to a ratio corresponding to that of the capacity of at least one liquid pump to the total capacity of both liquid pumps.

Abstract: A vehicle for deicing aircraft comprises an undercarriage (1) having a lifting device (4,5,6,7) carrying a closed operation cabin (3). The vehicle includes a spray device for applying spray fluid to the aircraft, and this spray device comprises a pump and a connected spray nozzle. To avoid frequent adjustments of the position of the carriage and to allow spray operations close to the areas to be sprayed, the spray nozzle is supported on a longitudinally adjustable lightweight boom (20) carried by the cabin (3). The cabin (3) is further pivotally supported by a turntable construction (15,16) relative to the carriage (1). The nozzle is also connected to remote control devices in the cabin (3) for pivotal movement of the nozzle about two axes extending perpendicular to each other. The two pivot axes are appropriately intersecting in a point coinciding with the direction of the jet from the nozzle.