Patent ID: 7351046
Filing Date: 2008-04-01
Classification: F16D,F16H

Abstract:
1. A vane-type machine comprising: a drive shaft having an axial direction, having a shaft groove; a rotor driven by the drive shaft, the rotor being rotatably mounted inside a lift ring between two lateral faces, the rotor having a circumferential surface with slots running radially and extend across an entire width of the rotor, the rotor having vanes being bearing-mounted in the slots so as to be radially movable, the drive shaft being connectable to the rotor via a shaft-hub connection, the rotor having a rotor groove; at least one driving element for aiding in transmitting torque between the drive shaft and the rotor, the driving element located between the shaft and the rotor partly in the shaft groove and partly in the rotor groove, the shaft groove and the rotor groove extending axially, and the driving element being a circular cylinder or a sphere; a minimized contact surface minimized in the axial direction between at least one of: the drive shaft and the rotor; the drive shaft and the driving element; and the rotor and the driving element.