Abstract: A direct drive system for the rotating cutter shaft assembly in a flail mower includes a internally splined collar having a thermal interfitment within and welded attachment to a rotating shaft assembly. An externally splined shaft from a drive motor mounted to the flail mower housing fits into the internally splined collar to provide rotational force to the rotating cutter shaft assembly.

Abstract: A self-cleaning mounting system for a ground roller assembly to be used on a mower such as a flail mower including a stationary sleeve bearing positioned on mounting shafts extending from either end of the ground roller. The stationary sleeve bearing is positioned in a housing which is vertically positionably with respect to the mower housing. The housing includes a stationary helical flight and a seal guard which fits within the ground roller. The stationary sleeve bearing is protected on either end from dirt and debris getting between the inside surface of the stationary sleeve bearing and the outside surface of the mounting shafts on either end of the ground roller.

Abstract: A mounting system for a ground roller assembly to be used on a mower such as a flail mower including a stationary sleeve bearing positioned on mounting shafts extending from either end of the ground roller. The stationary sleeve bearing is positioned in a housing which is vertically positionably with respect to the mower housing. The stationary sleeve bearing is protected on either end from dirt and debris getting between the inside surface of the stationary sleeve bearing and the outside surface of the mounting shafts on either end of the ground roller.

Abstract: A self-cleaning mounting system for a ground roller assembly to be used on a mower such as a flail mower including a stationary sleeve bearing positioned on mounting shafts extending from either end of the ground roller. The stationary sleeve bearing is positioned in a housing which is vertically positionably with respect to the mower housing. The housing includes a stationary helical flight and a seal guard which fits within the ground roller. The stationary sleeve bearing is protected on either end from dirt and debris getting between the inside surface of the stationary sleeve bearing and the outside surface of the mounting shafts on either end of the ground roller.

Abstract: A direct drive system for the rotating cutter shaft assembly in a flail mower includes a internally splined collar having a thermal interfitment within and welded attachment to a rotating shaft assembly. An externally splined shaft from a drive motor mounted to the flail mower housing fits into the internally splined collar to provide rotational force to the rotating cutter shaft assembly.

Abstract: A heat exchanger is provided which has a heat exchanger coil made from a continuous length of tubing arranged in an alternating series of conical helical and reverse conical helical winds wherein the medium to be heated flows downwardly through the coil and the heated medium from which heat energy is to be transferred flows upwardly around the coil in counter flow fashion to provide for a compact and efficient heat exchanger. Two methods of constructing such a coil are disclosed which utilize one or more mandrels to form the tubing into the approximately shaped coil.