Rotary vane fluid power unit

Claim 1

A ROTARY VANE FLUID POWER UNIT COMPRISING, IN COMBINATION, A ROTOR, A HOUSING ENCASING SAID ROTOR AND INCLUDING MEANS DEFINING A CAM SURFACE ENCIRCLING SAID ROTOR, SAID CAM, SURFACE BEING SHAPED AND POSITIONED IN RELATION TO THE PERIPHERY OF SAID ROTOR TO DEFINE THEREWITH A WORKING SPACE FOR FLUID, SAID HOUSING DEFINING FLOW PASSAGES COMMUNICATING WITH SAID SPACE AT SPACED POSITIONS THEREALONG, SAID ROTOR DEFINING AN ANNULAR SERIES OF VANE SLOTS THEREIN OPENING OUTWARDLY THROUGH THE PERIPHERY OF THE ROTOR AND BEING SEPARATED BY INTERVENTING SECTORS OF THE ROTORS, A PLURALITY OF VANES MOUNTED IN SAID RESPECTIVE SLOTS TO EXTEND FROM THE PERIPHERY OF THE ROTOR INTO CONTINUOUS ENGAGEMENT WITH SAID CAM SURFACE, EACH VANE BEING SLIDABLE IN ITS SLOT BETWEEN A FULLY EXTENDED POSITION AND A FULLY RETRACTED POSITION TO EFFECT CONTINUOUS ENGAGEMENT OF THE OUTER MARGINAL EDGE OF THE VANE WITH SAID CAM SURFACE UPON ROTATION OF THE ROTOR, EACH VANE HAVING AN INNER EDGE DISPOSED WITHIN THE CORRESPONDING VANE SLOT FOR ALL POSITIONS OF THE VANE AND BEING SHAPED TO DEFINE IN AN INNER PORTION OF THE VANE A NOTCH EXTENDING BETWEEN OPPOSITE SIDES OF THE VANE AND EXTENDING OUTWARDLY IN THE VANE FOR AN EXTENDED DISTANCE WITHIN THE INNER EXTREMITY OF THE VANE, PLUGS DISPOSED WITHIN SAID RESPECTIVE VANE FOR SUBSTANTIAL DISTANCES OUTWARDLY OF THE COACTING VANES FOR SUBSTANTIAL DISTANCES OUTWARDLY OF THE POSITIONS OCCUPIED BY THE INNER EXTREMITIES OF THE RESPECTIVE VANES WHEN THE RESPECTIVE VANES ARE MOVED INTO THEIR RETRACTED POSITIONS IN THE SLOTS BY SAID CAM SURFACE, SAID PLUGS EACH BEING SHAPED AND DIMENSIONED TO FIRMLY ENGAGE SIMULTANEOUSLY THE TWO OPPOSING SIDE SURFACES OF THE ASSOCIATED SLOT TO EFFECT BY MEANS OF THE PLUGS A MUTUAL REINFORCEMENT OF SAID INTERVENING ROTOR SECTORS, THE PORTION OF EACH INTERVENTING ROTOR SECTOR