Abstract: A rotary vane pump comprising a housing having an inner cam surface defining a chamber and an inlet and an outlet port establishing fluid communication. A plurality of vanes are arranged substantially radially about a central vane axis of rotation. A rotatable carousel rotor is positioned on a drive axis displaced a predetermined distance from the central vane axis. The carousel has slot members positioned in it for reciprocally carrying each vane during the rotation of the vane. A one-piece central rotor gear is rotatably mounted on the central axis for pivotally coupling each vane at a point offset from the vane axis to establish rocking lever action between the carousel and the vanes upon rotation of the vanes.