Reversable pump and motor

Claim 1

IN A REVERSIBLE MACHINE COMPRISING A HOUSING HAVING INLET AND OUTLET PORTS, A ROTOR MOUNTED FOR ROTATION ON A SHAFT IN SAID HOUSING, VANES MOUNTED VANE SLOTS IN SAID ROTOR BEARING ON A VANE TRACK FORMING LOW AND HIGH PRESSURE FLUID CHAMBERS, A STEP ON THE OUTER END OF SAID VANES, PORTS ON SIDE OPPOSITE SAID STEPS LEADING FROM ONE OF SAID FLUID CHAMBERS TO THE INNER END OF ITS MAIN BODY OF EACH SAID VANE, SAID VANES HAVING A SINGLE SEALING CONTACT ON SAID VANE TRACK WITH ITS CENTER IN LINE WITH ITS STEP SIDE EDGE OVER-LAPPING EACH SIDE OF SAID SIDE EDGE FORMING A PREDETERMINED WIDTH OF ITS BEARING SURFACE ON SAID VANE TRACK THROUGH THE SEALING ZONES IN SAID MACHINE, AREAS ON EACH SIDE OF SAID OVER-LAP AND ITS RESPECTIVE INNER END AREAS EXPOSED TO FLUID, WHEN SAID FLUID PRESSURE IS EXPOSED TO EITHER SIDE OF SAID VANE ITS LARGER AREA ON ITS INNER END OVER-BALANCING ITS SMALLER AREA ON ITS OUTER END PROVIDING A SLIDING FRICTION FLUID PRESSURE FORCE PER ITS SQUARE INCH OF AREA BEARING ON SAID VANE TRACK EQUALING ONE HALF OF P.S.I. IN SAID MACHINE THROUGH SAID SEALING ZONES WHILE TRANSFERRING FLUID UNDER HIGH PRESSURE.