A hydraulically-foldable agricultural machine frame includes a hydraulic cylinder assembly that connects and pivots two lateral parts of the hydraulically-foldable agricultural machine frame relative to one another, wherein unrestricted pivoting or folding of the lateral parts is prevented by movement of the hydraulic cylinder assembly only being guided or delimited laterally.

An agricultural implement having a main 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 being provided with operating elements remote from the support structure, the support structure defining a working width between the operating elements and the main chassis member, and the support arms being 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. In a headland position the support arms are adjustable such that a distance between the operating elements and the main chassis member is less than the minimum working width.

A system, apparatus and method for adjusting fore/aft level trim of the frame of a towed agricultural tillage implement utilize an electronic control unit that receives an input signal indicative of a desired depth of penetration of tillage tools operatively attached to the front and rear of the implement frame, and automatically computes a desired for/aft trim angle as a function of the desired depth input, and then adjusts the fore/aft trim of the implement frame by titling the frame toward the front or rear of the frame in accordance with the desired fore/aft trim angle computed from the desired depth input signal.

A horizontally foldable toolbar includes opposite wings having flex joints which can be selectively locked to prevent flexing of the joints when the wings are in a transport position and unlocked to permit flexing of the joints when the wings are in a field position. The lock assembly includes a hydraulic cylinder with an extendable and retractable arm. Operation of the hydraulic cylinder can be controlled by an operator remotely, such as from a tractor cab. The stroke of the hydraulic cylinder can be adjusted to accommodate wear on the wing components.

A portable frame is configured to be transported by the forks of a fork lift truck and has hydraulic lines releasably connectable to the auxiliary hydraulic fluid pressure system of the fork lift truck. A valve and a set of hydraulic lines are mounted on the portable frame for releasable connection to the hydraulic fluid lines of a tillage machine so that an inexpensive fork lift truck may be utilized to test operation of hydraulically actuated tillage components.

An agricultural implement (1) for soil working, comprising a frame (10, 101, 10a, 10b, 10c, 10d, 10e), a number of ground-engaging tools (12, 13) carried by the frame, at least one rolling ground support (11a, 11b), the height position of which is adjustable relative to the frame, a height sensor (31) for contact-free measuring of the height position of the frame relative to a ground surface (G1), and a control unit (15), arranged to receive a signal from the height sensor (31) and to control the height position of the rolling ground support (11a, 11b). At least one of the tools (12, 13) is resilient relative to the frame (10, 101, 10a, 10b, 10c, 10d, 10e). A tool position sensor (32) is arranged to measure the orientation of the tool (12, 13), and the control unit (15) is arranged to receive a signal from the tool position sensor (32) and to calculate a work depth for said tool (12, 13) based on the signal from the height sensor (31) and based on the signal from the tool position sensor (32). Furthermore, a method of determining the work depth of a soil-working agricultural implement is shown.

A mowing device (10) has a central frame mounted on wheels (16a, 16b) carrying at least two mowing units (20a, 20b) which are each connected to the central frame (12) via a connection unit (24a, 24b), wherein a connection unit (24a, 24b) includes a main pivot arm (28a, 28b) and an outer pivot arm (26a, 26b), the outer pivot arm (26a, 26b) connected to the main pivot arm (28a, 28b) in such a manner that it is pivotable about an outer arm joint (34a, 34b) relative to the main pivot arm (28a, 28b), the connection unit (24a, 24b) further including a mowing unit joint (32a, 32b) for connecting the mowing unit (20a, 20b) to the outer pivot arm (26a, 26b), the mowing unit joint (32a, 32b) arranged at the end of the outer pivot arm (26a, 26b) that is remote from the outer arm joint (34a, 34b).

The invention relates to an adjustable hoeing device (10) for removing weeds situated on a ground surface, the hoeing device (10) having a supporting frame (50), on which there is arranged at least one hoeing unit (100), which hoeing unit comprises the following:at least one main bar (200) and at least two transverse bars (250) arranged parallel to one another, which transverse bars (250) are each mounted rotatably on the at least one main bar (200);at least two connection bars (300), which run parallel to the at least one main bar (200) and which mechanically connect the at least two transverse bars (250) to one another;at least two blades (500), wherein the blades (500) are arranged on the at least two transverse bars (250) at a normal distance from the main bar (200); andat least one actuation device (400), which acts on at least two transverse bars (250) or a transverse bar (250) and the main bar (200) in order to rotate same by means of a linearly displaceable actuation arm.

A tillage implement has a frame with a center section and first and second outer wing sections hingedly attached to respective outer ends of the center section. Controlling a pressure in a secondary side of a hydraulic circuit enables adjustment of the downward pressure precharge provided by hydraulic cylinders based on a desired stiffness of the implement. Flow from a hydraulic supply through a pressure-reducing valve puts the downward pressure precharge on gauge wheels. Once this desired downward pressure precharge has been achieved, flow from the hydraulic supply is shut off and a check valve holds the pressure such that the hydraulic cylinders hold the gauge wheels in the desired position.

A mower includes a frame, at least one cutting unit, and a lifting unit. The lifting unit is connected to the at least one cutting unit and includes a yoke assembly, a first arm assembly, a second arm assembly, and a third arm assembly. The yoke assembly is connected to the cutting unit. The first arm assembly is pivotably mounted to the vehicle frame about a first pivot axis. The second arm assembly is pivotably mounted to the first arm assembly about a second pivot axis and to the yoke assembly about a third pivot axis with the second pivot axis and third pivot axis being non-parallel to the first pivot axis. The third arm assembly includes a first end pivotally connected to the frame and a second end pivotally connected to the second arm assembly.