The present invention relates to a hydraulic motor is superior economics to reproduce a doubling compared to the first energy input power around the centrifugal hydraulic equipment to a strong pumping action. ; The present invention relates to a fluid flowing from the tank by the supplementary drive means to compress the main pump discharge to accomplish this; A first hydraulic tank which is filled with fluid from the main pump urgent transmission; And a plurality of cylinder the fluid flowing from the first hydraulic tank which is operated sequentially supplied by the flow path opening and closing means, provided in the plurality of the cylinder piston rod is crank portion and the centrifugal side of one side of the power transmission member for a flow path opening and closing means, the other the fluid and the hydraulic machine to be installed, including the crank axis power transmission member, the cylinder is discharged from the secondary engine is returned to the supplementary tank of the main pump; And the original mandrel is driven member receiving power transmission from the power transmission member of said secondary engine mounted and the pump cam being installed, accommodate the pump cam and the inner wall, which is installed in the plurality of the small pump is an inner peripheral surface that is operated by the pump cam and the pump casing made of an outer wall forming a hydraulic chamber between itself and the inner wall, and the supplementary tank holding the pump casing and sealed and formed to be receiving the fluid flowing from the chamber wherein the oil pressure, radially plurality mounted to the pump cam and each of the distal end portion including hydraulic equipment that supports the weight Add weight to be installed; Second hydraulic fluid tank to be filled is fed from an oil pressure chamber of the centrifugal hydraulic equipment; And a plurality of cylinder the fluid flowing from the second hydraulic tank operated sequentially supplied by the flow path opening and closing means, the plurality of the cylinder piston rod is installed in a crank part one side of the side of the other and the power transmission member for the flow path opening and closing means and including a crank axis which the power transmission member is provided, the fluid is discharged from the cylinder 32, the third engine is returned to the supplementary tank of the centrifugal hydraulic equipment; characterized by, including a configured.
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