Abstract: A multipurpose machine for close-row production of tree or shrub plantations, such as vineyards or orchards includes a working head including a rotor powered by a motor and designed for receiving at least two interchangeable tools. The invention also includes a meshing guide peripherally configured to mesh with the foot of trees or shrubs and arranged above the tools, the meshing guide being capable of rotating at a speed different from that of the rotor and having, viewed from the direction of said axis, the general shape of a notched disc having at its periphery alternating notches and projecting parts, the length of the operating radius of the rotary tools being not more than that of the radius of a circle tangent to the base of the notches of the guide, which can thereby, in operation, successively mesh with the base of the trees or shrubs, when coming in contact with the latter.

Abstract: An electronic anti-skid device for motor vehicles with hydrostatic transmission has at least one sensor for the transmission of data pertaining to the output of the hydrostatic transmission, a steering angle detector and an electronic computer. The electronic computer uses data from the sensor to calculate theoretical power output of the hydraulic motors of the driver wheels of the vehicles and, thus, the theoretical speed of the wheels. The electronic computer is programmed to scan the detectors at very rapid intervals, and to adjust, on each scan, hydraulic output from output regulators. The output regulators have electrical controllers and are coupled to each hydraulic motor of a driven wheel way as to limit the power from each regulator to a value marginally above the theoretical output for the motor of the wheel to which the power regulator is connected.

Abstract: Removable universal tool-holder for mounting on a straddling vineyard tractor for agricultural work in tree or shrub plantations includes a main coupling chassis constructed so that it can be mounted, in a removable manner, on a straddling vineyard tractor; two secondary coupling chassis, each provided with a universal three-point hitch system; mechanisms connecting each secondary coupling chassis to the main coupling chassis; and mechanisms that make it possible to move each secondary coupling chassis in a vertical or approximately vertical plane and, preferably, in a horizontal or approximately horizontal plane. It is understood that the universal tool-holder can support machines constructed to accomplish cultivation or treatment work such as: hoeing, mowing, plowing, harrowing, spraying, thinning out leaves, pruning, lopping, etc.

Abstract: Machine for working the soil in tree or shrub plantations, consisting of a chassis (1-2) equipped with mechanisms (4-5a, 11, 11) allowing it to be mounted on the universal three-point hitch system of a farm tractor and consisting, laterally, of mechanisms (28a, 28b) permitting the mounting of lateral tools (29A, 29B) allowing the working of the soil near the feet of the aligned trees or shrubs and mechanisms for driving these tools in rotation from the power take-off shaft of the tractor, characterized in that the chassis (1-2) is itself provided with a universal three-point hitch system (4-5b, 13, 13) allowing the mounting, on this chassis, of a second machine that customarily moves in between the rows, for the working or the treatment of the soil, or any other job related to the cultivating of the trees or shrubs.