Pressure loaded fluid motor with high starting torque

Claim 1

IN FLUID GEAR MOTOR INCLUDING A HOUSING HAVING A HOLLOWED BODY SECTION DEFINING A GEAR CHAMBER, A PAIR OF MATING GEARS ARRANGED TO ROTATE IN SAID GEAR CHAMBER AND PRESENTING MESHING TEETH, SAID GEAR CHAMBER PROVIDED WITH AN INLET ON ONE SIDE OF SAID GEARS AND WITH A LOW PRESSURE DISCHARGE ON THE OUTLET SIDE OF SAID GEARS, IN END PLATE CLOSING ONE END OF SAID GEAR CHAMBER AND CONFRONTING THE END FACES OF SAID GEARS AT THE END, THE IMPROVEMENT COMPRISING: A PRESSURE SEALING PLATE BETWEEN THE END FACES OF SAID GEARS AND SAID END PLATE AND DEFINING WITH THE LATTER A PRESSURE LOADING ZONE, A FIRST DUCT CONNECTED TO THAT ZONE OF SAID GEAR CHAMBER, ON THE OUTLET SIDE THEREOF, IN WHICH FLUID IS TRAPPED AND PRESSURIZED BETWEEN THE MESHING GEAR TEETH, A SECOND DUCT CONNECTED TO SAID PRESSURE LOADING ZONE, A HEARD DUCT INTERCONNECING SAID FIRST AND SECOND DUCTS, A THIRD DUCT CONNECTING SAID HEADER DUCT AND SAID GEAR CHAMBER AT THE INLER SIDE THEREOF, A CHECK VALVE INTERPOSED BETWEEN AND AFFORDING FLOW FROM SAID HEADER DUCT INTO SAID THIRD DUCT IN RESPONSE TO A PREDETERMINED PRESSURE DIFFERENTIAL THEREBETWEEN, AND AN ORIFICED DUCT CONNECTED TO SAID HEADER DUCT AND AFFORDING LIMITED FLOW FROM SAID HEADER DUCT IN A PATH COMMUNICATING WITH SAID LOW PRESSURE DISCHARGE.