The present invention relates to mobile machinery such as an agricultural tractor comprising a three-point hitch for the connection and use of working implements cultivating or excavating the earth and other duties involved in the industry of farming or grading excavation. The disclosed invention modifies and improves the conventional three-point hitch in use today. The disclosed invention modifies the three-point hitch by adding extending and retracting implement-actuators attachable to the existing bottom-lift-arms, therefore supplanting, but still using the existing bottom-lift-arms on the three-point hitch. The implement-actuators assist the implement in correcting the implements centerline when the tractor centerline is off a predetermined centerline path. In addition, the extending of the implement-actuators proportionally, inversely and simultaneously can correct the pivot point of the implement to match the pivot point of the tractor while the tractor performs turns during the working use of the implement.

A hitch device for an implement, suitable for being mounted on an agricultural vehicle, including a chassis transverse to the direction of travel of the hitch, a system for coupling an agricultural implement to the chassis, the coupling system being designed to pivot freely relative to the chassis, about a vertical axis, an attachment device for attaching the chassis to the agricultural vehicle, the attachment device including at least two arms intended to link the chassis to the agricultural vehicle, and each carrying two pivot links that together define a deformable parallelogram.

An upper link for a three-point power lift of an agricultural tractor including a cylindrical connecting sleeve, a first fastening element rotated into a first open end of the cylindrical connecting sleeve and configured to be attached to the agricultural tractor, a second fastening element rotated into a second open end of the cylindrical connecting sleeve and configured to produce a releasable connection to an attachment, and a retaining bar attached to the first fastening element. The retaining bar includes a bar portion having a locking region for receiving a retaining catch and runs spaced apart along the cylindrical connecting sleeve. The retaining bar includes a support element encompassing the cylindrical connecting sleeve such that the connecting sleeve is rotationally displaceable, and the length of the upper link is varied by rotating the cylindrical connecting sleeve.

A three-point hitch for an agricultural tractor includes a hydraulically actuatable lifting arm, a vertically pivotable lower link, and a lifting strut arranged between the lifting arm and the lower link. The lifting strut transmits to the lower link a pivoting movement on the lifting arm. The lifting strut includes a first fastening portion articulated to the lifting arm and a second fastening portion articulated to the lower link. The second fastening portion includes first and second fastening segments which encompass the lower link in a fork-shaped manner. A bearing pin disposed between the two fastening segments extends through a slot formed in the lower link. By pivoting the lower link, the bearing pin is displaced inside the slot between a first working position and a second working position. In each position, the bearing pin is secured inside the slot by a blocking arrangement.

A link assembly for a hitch includes a first link and a second link. The second link has first and second spaced apart bores extending therethrough. A coupling member is attached to an end of the first link. The coupling member includes first and second spaced apart coupling plates. The coupling member has a load bore extending through the first and second coupling plates and has a plurality of index bores extending through the first and second coupling plates. A load pin is receivable by the load bore and the first bore, and pivotally couples the second link to the first link. An index pin is removably receivable by the second bore and a selected index bore, and the index pin is movable independently of the load pin.

A coupling mechanism controls the location of the central primary draft load transmitting fixed-length link independently of the coupler. The coupling mechanism allows for translation in at least three orthogonal directions and for rotation of two distinct planes between coupled components, thereby providing a means for lateral shifting and articulation. The coupling mechanism mitigates unexpected rotation by restricting rotation along a longitudinal axis of the fixed-length link. Rotation of the coupling mechanism is furthermore controlled by means of a indexing turntable. The orientation and the position of the coupling mechanism is therefore determinant and predictable.

A steerable cart or trailer is towed by another vehicle. A reverse linkage made up of arms that crisscross one another extends between the tow vehicle and the steerable trailer. The linkage arms are parallel a distance from the tow vehicle before crisscrossing with one another towards the trailer. The linkage arms are rotatable at each end. This allows the arms to rotate in a manner in which the trailer will more closely follow the path of the tow vehicle, especially when the tow vehicle is in the process of turning. The trailer will follow in a manner that reduces compaction and provides a simpler overall operation of equipment.

An agricultural implement includes a chassis; a linkage carried by the chassis; a turnbuckle connected to the linkage and having a frame which includes a threaded hole formed therein and a non-circular region; and a latch pivotable about a fulcrum carried above the frame. The latch has a notch formed therein which is shaped to prevent substantial rotation of the frame when engaged with the non-circular region of the frame.

A stabilizer for a attachment device of a vehicle includes a first adjusting element and a second adjusting element, guided adjustably relative to one another along a longitudinal axis to vary the length of the stabilizer. A first connecting element on the first adjusting element can support the stabilizer against the vehicle. A second connecting element can support the stabilizer against an element of the attachment device, being held on the second adjusting element in an axially adjustable manner for adjusting the length of the second adjusting element and fixable on the second adjusting element at least in an extending position and in a shortening position. In a maximally retracted position of the first adjusting element and the second adjusting element relative to each other, and in the extending position of the second connecting element, the first adjusting element is axially supported against the second connecting element or the second adjusting element. In the maximally retracted position of the first adjusting element and the second adjusting element relative to each other, and in the shortening position of the second connecting element, the first adjusting element is axially supported against the second connecting element.

A stabilizer for an attachment device of a vehicle comprises a first adjusting element and a second adjusting element which are guided adjustably relative to one another along a longitudinal axis in order to vary the length of the stabilizer, a first connecting element on the first adjusting element for supporting the stabilizer against the vehicle, and a second connecting element on the second adjusting element for supporting the stabilizer against an element of the attachment device, the second connecting element being connected to the second adjusting element such that it can be rotated about the longitudinal axis via a screw connection for adjusting the length of the second adjusting element. The stabilizer further has a locking device, which is connected to the second adjusting element and the second connecting element, the second adjusting element and the second connecting element being connected to one another in a rotationally fixed manner in a locking position of the locking device.