Abstract: A controller is connected to a pressure sensor. The controller controls a regulator of a sub-pump in accordance with a pressure signal from the pressure sensor, detects an output of a main pump, and controls an output of an electric motor according to the output of the main pump based on a table stored beforehand.

Abstract: A tiller with chassis, pair of handles, and tines, wherein simultaneously raising one handle and lowering the other twists the chassis to lower one tine and raise the other. The tines comprise pairs of blades, each blade having a pair of upturned tips. The height of tines is adjusted by adjusting the support for a wheel. The tiller is supported by an arm having a single ground engaging wheel, pivoting the arm and locking in position to adjust the height of the tiller. The tiller includes a third handle located along its chassis. The chassis is formed from two longitudinally split components. A blade cover for the tiller is thin and curved to lie in an arc spaced from the rotating tips of the tines. An attachment for the tiller has a V-shaped tip and shaped to form a furrow.

Abstract: A safety mechanism for a turf aerator having a frame and an engine with a governor that generally prevents the turf aerator from operating at full power unless the safety mechanism is engaged. A blocking mechanism and a manual actuation device are mounted to the frame. The manual actuation device is in mechanical communication with the blocking mechanism. The blocking mechanism urges the governor toward a loaded position and the engine operates at a generally low power when the governor is in the loaded position.

Abstract: A safety mechanism for a turf aerator having a frame and an engine with a governor that generally prevents the turf aerator from operating at full power unless the safety mechanism is engaged. A blocking mechanism and a manual actuation device are mounted to the frame. The manual actuation device is in mechanical communication with the blocking mechanism. The blocking mechanism urges the governor toward a loaded position and the engine operates at a generally low power when the governor is in the loaded position.

Abstract: A walk-behind, multi-functional device for use in a nursery is capable cultivating while applying fertilizer and herbicide as desired. An electric clutch assembly combines with a steering assembly to permit easy maneuverability of the walk-behind device.

Abstract: A nursery cultivating assembly is carried on a modified zero turning radius tractor and includes a cultivating device, a spraying device, and a tank assembly operably interconnected thereon, while providing for trees to be planted closer together.

Abstract: A tine tiller has a frame mounted on traction wheels for movement in either direction. The frame has tines rotatably mounted on each side thereof and driven in either direction irrespective of the direction of movement of the frame by rotation of the traction wheels. The speed of rotation of the traction wheels can be changed without stopping movement of the frame.

Abstract: A rotary tiller device with a rotor disposed for rotation about a vertical axis is adapted for mounting on the lift arms of a mobile vehicle and includes a yieldable arm suspension mechanism and spring tiller teeth depending downwardly from the rotor, both of which in combination with each other provide uniform tillage depth control of the device. The rotor assembly can be moved laterally inwardly and outwardly with respect to the frame, and the beam can be adjustably swiveled about a vertical axis such that the rotor can be positioned to the left side, right side, or front of the frame or vehicle.

Abstract: A tractor having a frame supported by ground-engaging drive wheels, a tool bar carried by the tractor and on which various implements may be mounted, the tool bar being universally mounted on the frame whereby the implement may be raised above or lowered to the ground, and can follow the contour of the ground, a power unit also mounted on the tool bar so as to have a direct driving connection to the implement not affected by the universal "floating" movement of the implement and tool bar, and a driving connection between the power unit and the drive wheels, of a type not affected by the relative movability of the tool bar and tractor frame, in order that both the implement and the tractor may be driven by a single power unit. Mechanism is also provided for pivoting the tool bar to elevate the implement above the ground when desired, for supporting the tool bar while implements are changed, and for holding the implement firmly against the ground when required.

Abstract: A self propelled disk harrow having four gangs of disc members attached thereto which are rotated to propel the disk harrow and to thereby till the soil. Wheels are provided for allowing the disk harrow to travel on public roads and to aid in propelling the disk harrow. When the disc members extend too far into the soil or otherwise become ineffective in propelling the disk harrow, such as because of wet or sandy soil, the weight of the disk harrow transfers to the wheels and the wheels tend to primarily propel the disk harrow.

Abstract: A self-propelled tiller-planter including a motor providing hydraulic motive power for various operating mechanisms. A tiller pushed by said planter and hydraulic means is provided for lifting and lowering the tiller assembly into inoperative position above the ground and into operative tilling position in contact with the ground. A pivoting cradle is provided to which the motor is fixed, the cradle rocking simultaneously with the up and down movements of the tiller insuring that the shaft to the tiller assembly is in alignment with the motor. Since the tiller is pushed at the front of the planter the soil being worked thereby may be packed down by the wheels which follow the tiller and means are provided at the rear of the rear wheels of the planter to rework the soil for the planting operation.

Abstract: According to this invention there is provided a soil cultivating implement comprising a plurality of downwardly extending tines arranged in a transverse row and rotatable ground engaging members that are located in front of and behind the row of tines with respect to the intended direction of operative travel of the implement, at least one of the rotatable ground engaging members being in the form of a roller which is mechanically driven during operation, said roller being disposed to the rear of said row of downwardly extending tines and comprising a number of longitudinal elements which extend in the direction of the axis of rotation of the said roller.

Abstract: A self-propelled agricultural machine which includes a vehicle capable of automonously advancing when driven, and an assembly of implements capable of processing the soil during advancement of the vehicle. The machine includes a primary source of mechanical energy operatively connected with at least two transducers which are each individually capable of transforming the mechanical energy of the primary source into independent non-mechanical energy. The respective transducers in turn are each connected in circuit with an associated driving member wherein one of the driving members is operatively connected to the vehicle to effect the drive thereof; and the other driving member is operatively connected to the implements to effect the drive thereof, whereby the power provided by the primary source can be selectively and variably applied to either the vehicle and the implements as the vehicle is driven.

Abstract: The ditcher is provided with two engines. The first engine powers the hydraulic system which rotates the digging wheel. The second engine powers the hydraulic system which actuates the wheel lifting cylinders, the conveyor system and the track driving means. The two hydraulic systems are selectively interconnected so that, in the event that the second engine fails, the first engine can be used to actuate the wheel lifting cylinders and track driving means. As a result, the ditcher's wheel can be lifted to the travelling position and the tracks driven to move the ditcher off the pipe line right-of-way and enable it to return to a base camp for repairs.