Abstract: A rotary pump is provided with a pump housing, a rotor situated in the pump housing and rotatable by means of a drive shaft, and also blade elements which are accommodated so that they can slide in grooves on the periphery of the rotor, and which interact in a sealing manner with a fixed cam surface. The pump housing is composed of three pump housing parts tightly connected to each other, the central pump housing part containing the cam surface. In order to simplify the housing, a port plate is provided with supply ports and discharge ports and accommodated in the central pump housing part. Preferably, the blade elements rest with one of their sides faces against an end face which is formed by the inward-facing surface of an outer pump housing part.

Abstract: A continuously variable transmission provided with a primary pulley mounted on a primary shaft and a secondary pulley mounted on a secondary shaft. A transmission is passed over said pulleys. Both the primary pulley and the secondary pulley comprise a pair of discs. At least one of said discs is axially movable by a hydraulic cylinder, so as to adjust the position of the transmission around the pulleys and thus the transmission ratio of the transmission. The pump for providing fluid for said hydraulic cylinders has a regulable delivery, so as to enhance the transmission efficiency.

Abstract: Auxiliary equipment in a vehicle such as dynamo, fan, pumps etcetera are coupled to an engine by a continuously variable transmission. The pump is connected to the secondary shaft of the transmission, whereas the rest of the equipment is coupled to the shaft 9 via a controllable clutch. Engaging of the clutch takes place with a signal provided by per example a Pitot tube fixed to a secondary pulley of the transmission in dependence on the number of revolutions of the shaft.