Abstract: A working machine coupler device includes a top linkage, a lower linkage, a detachable frame including a second upper coupler to be coupled to a first upper coupler, and a second lower coupler to be coupled to a first lower coupler, and a top linkage controller. The second upper coupler is coupled to the first upper coupler when the lower linkage is pivoted upward, and the first lower coupler moves toward and be coupled to the second lower coupler when a front portion of the working machine is moved upward, and the top linkage controller regulates the stretching and shortening of the top linkage to hold the detachable frame inclining backward, and allows the top linkage to be shortened until the working machine takes a working posture after the lower linkage is pivoted downward from a state where the front portion of the working machine is lifted.

Abstract: An agricultural implement that includes a slotting mechanism and a slotting actuator is provided. The slotting mechanism is for cutting slots in a drip line in real time in conjunction with ground placement of the drip line. The slotting actuator is for actuating the slotting mechanism. The actuating is controlled by a computer following a slot spacing in a drip line prescription for a field in which a drip line is being placed.

Abstract: The hydraulic suspension system comprises a suspension mechanism for a traveling vehicle body, a suspension reference position variation mechanism for varying a reference position of a suspension stroke of the suspension mechanism, and a stopped state detector for detecting a state in which operation of the suspension mechanism has stopped. The control management unit controls the suspension reference position variation mechanism so that when operation of the suspension mechanism is detected by the stopped state detector to be in a stopped state, the operation of the suspension mechanism moves toward a target range, in preference to control based on a suspension stroke position obtained from a suspension stroke position sensor.

Abstract: The hydraulic suspension system comprises a suspension mechanism (100) for a traveling vehicle body, a suspension reference position variation mechanism (18) for varying a reference position of a suspension stroke of the suspension mechanism, and a stopped state detector (58) for detecting a state in which operation of the suspension mechanism (100) has stopped. The control management unit (60) controls the suspension reference position variation mechanism (18) so that when operation of the suspension mechanism (100) is detected by the stopped state detector (58) to be in a stopped state, the operation of the suspension mechanism (100) moves toward a target range, in preference to control based on a suspension stroke position obtained from a suspension stroke position sensor (37).

Abstract: A hitch device for a working vehicle for coupling a working device to the working vehicle has a lifting shaft unit supported in the frame structure of the working vehicle, and a coupling structure that is operatively connected therewith. The lifting shaft unit includes a lifting shaft, at least one lifting arm that is fixedly connected with the lifting shaft, and at least one reciprocating cylinder, which is hingedly connected with the lifting arm. The coupling structure includes first, upper coupling elements, which are located on the frame structure, second, lower coupling elements, which are hingedly connected to the frame structure, and connecting elements that are hingedly located on lifting arms of the lifting shaft. At least one of the connecting elements is rigid. In this manner, it is ensured that the load on the coupling elements that form the hitch device is balanced, even when a load is introduced asymmetrically.

Abstract: A support or hitch box supports a mounting bar in a selected vertical position. The mounting bar is received in a standard hitch receiver of any car, truck or other vehicle. A plow head is a light weight, strong, box like structure with oppositely directed mold boards so that the plow can operate in both forward and reverse directions. A linkage permits the mold board to be raised or lowered relative to the hitch box. The linkage includes upper and lower links to maintain the vertical orientation of the mold board. The plow head is mounted for pivoting in a horizontal plane. A pivot driver is user controlled to pivot the plow head and a lift driver is user operated to raise and lower the plow head. The plow head carries indicator lights. A spring, preloaded by the lift driver, applies a continuous down force to the plow head when it is the lower, plowing position.

Abstract: A hitch device for a working vehicle for coupling a working device to the working vehicle has a lifting shaft unit supported in the frame structure of the working vehicle, and a coupling structure that is operatively connected therewith. The lifting shaft unit includes a lifting shaft, at least one lifting arm that is fixedly connected with the lifting shaft, and at least one reciprocating cylinder, which is hingedly connected with the lifting arm. The coupling structure includes first, upper coupling elements, which are located on the frame structure, second, lower coupling elements, which are hingedly connected to the frame structure, and connecting elements that are hingedly located on lifting arms of the lifting shaft. At least one of the connecting elements is rigid. In this manner, it is ensured that the load on the coupling elements that form the hitch device is balanced, even when a load is introduced asymmetrically.

Abstract: A connecting device connecting a spray boom to a chassis of an agricultural sprayer, said connecting device is noteworthy in that it consists of a single quadrilateral arranged in a plane which is substantially vertical and substantially parallel to a longitudinal plane of said sprayer.

Abstract: A hitch system attachable between a towing utility vehicle and a towed device, where the utility vehicle has a power source. The hitch system has a first frame adapted to pivotably couple the towing vehicle and the towed device, a lift frame attachable to the utility vehicle, where the lift frame has a first member and a second member and the second member is pivotably connected to the first member. The second member is operationably connected to the power source to pivot the second member in relation to the first member. The second member has a tow point, which is offset from the centerline of the second member, enabling the towed device to be towed in an offset configuration. Finally, a top link pivotably connects the second member and the utility vehicle, the top link connecting at the tow point.

Abstract: A suspension system supports an implement on a work vehicle and includes a linkage mechanism providing pivotal connection between the work vehicle and the implement and adapted to pivot in such manner as to permit relative upward and downward movement between the vehicle and the implement while maintaining a controlled or selected orientation between them. A hydraulic actuator capable of extending and retracting is operatively connected between the work vehicle and the implement so as to effect the pivotal motion of the linkage and relative motion between the vehicle and implement. A shock absorber is interposed between the hydraulic actuator and one of the work vehicle and the implement for absorbing shock loadings tending to pass between the vehicle and the implement via the hydraulic actuator when in use. The shock absorber includes an elongated link mounted for pivotal motion at a point between opposing ends thereof.

Abstract: A hitch mechanism for coupling an implement to a utility vehicle includes a coupling frame and six variable length links. The frame has couplers for coupling to the implement. Each link has a first end coupled to the vehicle and a second end coupled to the coupling frame. The links are preferably arranged in the form of a hexapod, so that, in addition to the functions of known three-point hitches, the implement may be steered sideways or shifted sideways, and so that the motion of the coupling frame has six degrees of freedom.

Abstract: The hitch gear comprises a three point lift system. It comprises a system (10) for load transfer by means of a hydraulic cylinder (11) at the third point and at least adjustment wheel (13) provided with a load sensor (19) suitable to act with control means of the cylinder (11) for keeping the load at the level of the adjustment wheel (13) approximately constant. The lift system comprises at least one hydraulic cylinder (27); a control device (28) of the position of the lift system, known per se, is provided and comprises at least an attachment means (29) for a reference position and appreciable control means at the fixed position suitable for supplying the hydraulic cylinder (27).

Abstract: A hoisting mechanism for earth scraping equipment adapted for towing behind a vehicle, such mechanism including a plurality of pivotally connected links designed to pivot the scraper bed about rear wheels in a manner that provides for change in elevation of the scraper without affecting the elevation of the towing tongue at the point of towing connection. The hoisting mechanism is readily adaptable to include a pressurized accumulator selectively activated by scraper level by means of a cam operated valve to absorb shock while being towed in an elevated position. Further, the hydraulics utilized to move the rear wall forward for ejecting collected earth are the same hydraulics utilized to draw the rear wheels into the scraper bed for making the scraper narrower and therefore suitable for highway travel.

Abstract: A mechanical link member is provided which is easily variable in length for ease of connection yet rigid in operation by the use of hydraulic valve and screw-type adjustments. In addition to an interrupted flow position which prevents relative axial movement of the ends of the link member, the hydraulic valve has full flow and restricted flow positions to control the rate of length adjustment. A spring positions the mechanical link to a midrange position when the hydraulic valve is opened and the link ends are not attached to a load.

Abstract: A tractor implement lift height amplifier including a lift arm mounted on a rock shaft on a tractor and having links connected to the arm and with the links connected with the draft arms attached between the tractor and a draft implement. The lift arm and links are arranged for abutting engagement when the lift arm is pivoted upwardly, to thereby effect a solid, rather than articulated, lift connection so that the additional upward pivoting of the lift arm will induce maximum lifting of the implement itself.