An agricultural implement includes a first frame member and a second frame member pivotally connected to each other and an actuating assembly configured to rotate the second frame member. The actuating assembly includes a first link pivotally connected to the first frame member, a second link pivotally connected to the second frame member, and a third link attached to an actuator. Two of the first, second, and third links are pivotally connected by a connecting pin, which is received in a slot formed in the third one of the links. The actuating assembly is configured to prevent the pin from moving along the slot and to allow rotation of the second link relative to the third link, when the second frame member is arranged between a retracted position and an expanded position, and to allow the pin to move along the slot, when the second frame member is arranged in the expanded position.

An agricultural machine includes a frame, and a lifting unit configured to vary a height of an operating unit with respect to a supporting surface for the machine. The lifting unit includes hydraulic cylinder with a liner and first and second pistons both slidingly housed inside the liner and arranged in series to define first and second chambers inside the liner, wherein the first and second pistons are controllable independently. The lifting unit includes a pressure stabilizer in fluid connection with the first chamber and that controls a pressure in the first chamber so that the first piston moves therein as a force generated on the first piston varies. A second control element for the second chamber carries out a volumetric control of the second chamber to control a position of the second piston regardless of a pressure inside the second chamber.

An agricultural implement having an elongated main chassis member, ground engaging wheels for supporting the main chassis member on the ground and at least one set of two arms, each arm being provided with at least one working implement and each arm being pivotably connected to the main chassis member and adapted to be moved between a working position, a headland position and a transport position. In the headland position, an inner working implement of the at least one set of arms is displaced laterally away from the main chassis member. This has as an advantage that in the headland position, additional clearance between the tines at the lowermost end of each arm and the ground surface is provided.

The present invention provides provide adjustable dual rotary raking machines in which the lateral positions of the rotors and rakes may be moved while in use without stopping operation. The present invention also provides adjustable dual rotary raking machines which are suitable for collecting prunings from agricultural orchards or vineyards having low hanging branches. The present invention further provides adjustable dual rotary raking machines which may be easily collapsed for storage and transport into a small profile that allows multiple options for storing the machines, and does not require special permits to transport the collapsed machines on public roads.

An agricultural implement including a central chassis member having a support structure with support arms connected to the support structure for movement between a working position and a transport position, the support arms having operating elements defining a working width between the operating elements and the main chassis member. The support arms are adjustable in the working position between a length corresponding to minimum working width and a length greater than the minimum working width. In the transport position a distance between the operating elements and the main chassis member is less than the minimum working width. A first stop defines the position of the minimum working width and a second stop arranged vertically with respect to the first stop retains the support arm in the transport position when the distance between the operating elements and the main chassis member is less than the minimum working width.

A suspension mechanism for a rotary rake implement incorporates elastomeric shock absorbing members in the corners of a tubular member situated in between the corners of a square rod formed as part of the wheel assembly and received within the tubular member such that the corners of the square rod assert a pre-load spring force on the tubular member when the implement is in an extended operating configuration. The movement of the implement into a folded transport configuration with the weight of the implement supported on the transport wheel assemblies causes a deflection of the square rod that compresses the elastomeric shock absorbing members within the corners of the tubular member to provide maximum suspension for the implement when in transport, while providing minimum suspension when the implement is in operation. An end cap on the square rod engages a stop formed on the tubular member to control rotation.

An agricultural machine that has two sections hinged relative to each other is disclosed. An oblong hole is made in one of the two sections. The machine includes a connecting device that has an actuator configured to cause one section to pivot relative to the other, and a travel stop. The actuator supports a movable pivot rod with a longitudinal axis transverse to the oblong hole. The movable pivot rod is positioned to slide in the length of the oblong hole. The travel stop has a blocking state in which it obstructs the oblong hole, thereby limiting the sliding of the pivot rod in the oblong hole. The travel stop is able to achieve the blocking state from a free state in which it is mounted in a movable rotating manner relative to the oblong hole.

A towed agricultural working tool with a central frame element, a headstock and left and right hand side frame elements connected to the central frame element, each of the side elements supporting at least one processing unit, the central frame element being connected at, at least one connecting location for pivoting movement with respect to the headstock in which one or more friction elements are arranged between the central frame element and the headstock at one of the at least one connecting locations. This has as an advantage that the pivoting movement of the central frame with respect to the headstock, in particular due to induced yaw, is reduced.

An agricultural machine including a frame, at least one operating unit connected to the frame, at least one wheel or crawler track rotatably attached to the frame to allow the movement of the machine on a supporting surface and a lifting unit operatively interposed between the frame and the wheel or between the frame and the operating unit, configured to vary the height of the operating unit with respect to the supporting surface of the machine. The lifting unit includes at least one hydraulic cylinder provided with a liner, a first and a second piston both slidingly housed inside the liner and arranged in series to define at least a first and a second chamber inside the liner, wherein the first and the second piston can be controlled independently of each other.

The invention relates to an agricultural machine that has two sections hinged relative to each other, at least one oblong hole being made in one of the two sections, the machine including a connecting device that has an actuator configured to cause one section to pivot relative to the other, and a travel stop, the actuator supporting a movable pivot rod, with a longitudinal axis transverse to the oblong hole, the movable pivot rod being positioned to slide in the length of the oblong hole, the travel stop having a blocking state in which it obstructs the oblong hole, thereby limiting the sliding of the pivot rod in the oblong hole, the travel stop being able to achieve the blocking state from a free state in which it is mounted in a movable rotating manner relative to the oblong hole.