Rotary vane machine

Claim 1

A ROTARY, VANE MACHINE COMPRISING A ROTOR HAVING A CENTRAL PART, A PLURALITY OF SUBSTANTIALLY RADIAL SLOTS IN SAID CENTRAL PART, VANES MOUNTED IN SAID SLOTS, GUIDE MEANS FOR GUIDING SAID VANES IN SAID SLOTS SO THAT DURING THE ROTATION OF SAID ROTOR SAID VANES CARRY OUT A SUBSTANTIALLY RADIAL MOVEMENT IN SAID SLOTS, ROTOR SIDE WALLS ROTATABLE WITH AND DISPOSED AXIALLY AT BOTH SIDES OF SAID CENTRAL ROTOR PART, SAID CENTRAL ROTOR PART, SAID GUIDE MEANS, SAID VANES, AND SAID ROTOR SIDE WALL TOGETHER DEFINING WORK CHAMBERS WHICH ARE SEPARATED FROM EACH OTHER BY SAID VANES AND ARE LIMITED IN THE AXIAL DIRECTION BY SAID ROTOR SIDE WALLS AND PERIODICALLY INCREASE AND DECREASE IN SIZE AT EACH REVOLUTION OF SAID ROTOR, SUBSTANTIALLY RADIAL SLOTS IN SAID ROTOR SIDE WALLS AT LEAST PARTLY IN ALIGNMENT WITH SAID SLOTS IN SAID CENTRAL ROTOR PART, SAID VANES HAVING EXTENSIONS PROJECTING INTO SAID RADIAL SLOTS IN SAID ROTOR SIDE WALLS AND MOVABLE THEREIN IN A SUBSTANTIALLY RADIAL DIRECTION EACH OF SAID VANES FURTHER HAVING A CENTRAL PRESSURE AREA AT ONE LONGITUDINAL SIDE THEREOF ADJACENT TO SAID CENTRAL ROTOR PART AND ADAPTED TO RECEIVE A PRESSURE MEDIUM, SAID VANE EXTENSIONS HAVING BALANCING AREAS AT THE OPPOSITE LONGITUDINAL SIDE OF EACH VANE ADJACENT TO SAID ROTOR SIDE WALLS AND ADAPTED TO RECEIVE A PRESSURE MEDIUM, SAID BALANCING AREAS BEING CLOSED BY SAID VANES EXTENSIONS RELATIVE TO SAID SLOTS IN SAID ROTOR SIDE WALLS, COMMUNI-