Abstract: A semi-mounted monowheel plough includes a hitching device intended to be connected to a tractor, a single-piece frame equipped with plough bodies, a wheel and a beam guiding the wheel, the frame having a recess at the level of the wheel. Each plough body is connected to the frame by a first respective articulation, the plough bodies are connected with each other via a control mechanism integrated in the frame, each plough body is connected to the control mechanism by a second respective articulation and the control mechanism includes at least one straight bar and a curved bar.

Abstract: An articulated plow is provided with a laterally swingable pull bar (31) and steerable intermediate support wheels (46, 47) which are controlled by a hydraulic system providing correlated movement through parallel connected hydraulic jacks (37, 66). A latch mechanism (86) for releasably securing the pull bar (31) in its plowing position of adjustment is operated by the pull bar control jack (37) through an operating lever (41) having a lost motion connection with a spring loaded latch pin (87). A locking plate (131) is provided to automatically lock the latch pin (87) in its retracted position when the pull bar (31) is moved to its transport position.