Abstract: A concentric cylinder drive assembly (1) used for the transmission of power in industrial machinery is disclosed. More specifically, a concentric drive assembly (1) with a hollow outer cylinder (5) having an internal surface with a bi-directional surface lay; an inner cylinder (3) having an external surface with a unidirectional surface lay oriented at a predetermined angle (?) along the length of the cylinder; an annular channel established between the outer and inner cylinders having a predetermined gap (7); and a lubrication oil that substantially fills the annular channel is presented.

Abstract: The PTO assembly includes an engine driven input shaft, an output shaft, a transmission, a disconnect unit for selectively coupling and uncoupling the input shaft from the transmission and a clutch for coupling an uncoupling the transmission from the output shaft. A lubrication system includes a shaft lube circuit for lubricating the input shaft, a pump, and a lube control valve for controlling communication of lubricant from the pump to the lube circuit. The lube control valve is operatively coupled to the disconnect unit so that when the disconnect unit is engaged the lube control valve blocks communication from the pump to the lube circuit, and when the disconnect unit is disengaged the lube control valve communicates the pump to the lube circuit. The lubrication system also includes a transmission lube circuit for lubrication the transmission. The control valve communicates lubricant to the transmission lube circuit when the disconnect unit is engaged and disengaged.

Abstract: A concentric cylinder drive assembly (1) used for the transmission of power in industrial machinery is disclosed. More specifically, a concentric drive assembly (1) with a hollow outer cylinder (5) having an internal surface with a bi-directional surface lay; an inner cylinder (3) having an external surface with a unidirectional surface lay oriented at a predetermined angle (?) along the length of the cylinder; an annular channel established between the outer and inner cylinders having a predetermined gap (7); and a lubrication oil that substantially fills the annular channel is presented.

Abstract: The PTO assembly includes an engine driven input shaft, an output shaft, a transmission, a disconnect unit for selectively coupling and uncoupling the input shaft from the transmission and a clutch for coupling an uncoupling the transmission from the output shaft. A lubrication system includes a shaft lube circuit for lubricating the input shaft, a pump, and a lube control valve for controlling communication of lubricant from the pump to the lube circuit. The lube control valve is operatively coupled to the disconnect unit so that when the disconnect unit is engaged the lube control valve blocks communication from the pump to the lube circuit, and when the disconnect unit is disengaged the lube control valve communicates the pump to the lube circuit. The lubrication system also includes a transmission lube circuit for lubrication the transmission. The control valve communicates lubricant to the transmission lube circuit when the disconnect unit is engaged and disengaged.