Abstract: Tractor-drawn agricultural mower has three crop-cutting rotors rotatable about vertical axes and carrying crop-feeding drums. Two of the rotors contra-rotate inwards to feed cut crop between them. The third rotor is offset rearwards from a straight line intersecting the axes of rotation of the other two rotors and rotates in the same direction as the rotor adjacent it so that the crop which it cuts passes behind the adjacent rotor and towards the crop which has passed between the other two rotors, whereby a single swath of crop is produced by the mower.

Abstract: Agricultural mower has vertical axis crop-cutting rotors mounted for floating vertical movement relative to semi-mounted mower frame. Draught forces are transmitted to each rotor through a draught member below the rotor on which the rotor is journalled. The draught member projects rearwards beyond the cutting circle of the blades and is connected to the frame by an upwardly-extending structure including a parallelogram linkage.

Abstract: A semi-mounted or trailed agricultural mower has vertical axis crop-cutting rotors and a rigid rectangular open frame mounted above the rotors to support the rotors. The frame has at one end a ground-engageable support wheel secured to a rear beam of the frame and at the other end a headstock secured to a front beam of the frame. At least one of the rotors is trailed from the front beam on a linkage permitting the rotor to rise and fall relative to the frame.