Bush-cutter for the manual mowing of grass and the like

Bush-cutter for the manual mowing of grass, in which a rod or a stiff arm (12), working as a handle, supports at one end a cutting head (11) rotating around an axis (X—X) and having a cutting device with a cutting element, and in which an engine makes the cutting head rotate through gears, comprising a spacing device (13), including a spacer (14) which swings coaxially to said cutting head (11) around said axis (X—X) and which, during the mowing of the grass, may be brought into contact with any possible obstacle determining a radial distance of the obstacle from the cutting head (11), that is longer than the radial extension of the cutting element of said cutting device (11.2) in respect of the head, in order to avoid the contact of said cutting element with the obstacle,

• characterized in that said spacing device (13) includes a spring (19), which normally maintains said spacer (14) in a rest position—swung around said axis (X—X)—, in which the spacer—during the mowing of the grass—does not touch any possible obstacle before the cutting device (11.2), when the bush-cutter (10) is handled according to the normal forward direction of its cutting head (11), and
• in which said spacing device (13) includes an engagement or contact device (14.3, 21, 22) of said spacer (14), through which the spacer contacts an obstacle, and keeping the contact condition, while the cutting head (11) is moved substantially along a revolution arc around the obstacle—through the handle arm (12)—, said spacer (14), working as a swinging spacer, rotates around the axis (X—X) for a circumference arc, following the obstacle profile, so that the cutting device (11.2) can mow surrounding grass without touching the obstacle, and
• characterized in that said spacing or contact device (14.3, 21, 22) of the spacer (14) includes a finger (21), which is connected in a dismountable way and that juts out in respect of the outer edge of the spacer.

Bush-cutter for the manual mowing of grass, in which a rod or a stiff arm (12), working as a handle, supports at one end a cutting head (11) rotating around an axis (X—X) and having a cutting device with a cutting element, and in which an engine makes the cutting head rotate through gears, comprising a spacing device (13), including a spacer (14) which swings coaxially to said cutting head (11) around said axis (X—X) and which, during the mowing of the grass, may be brought into contact with any possible obstacle determining a radial distance of the obstacle from the cutting head (11), that is longer than the radial extension of the cutting element of said cutting device (11.2) in respect of the head, in order to avoid the contact of said cutting element with the obstacle,

• characterized in that said spacing device (13) includes a spring (19), which normally maintains said spacer (14) in a rest position—swung around said axis (X—X)—, in which the spacer—during the mowing of the grass—does not touch any possible obstacle before the cutting device (11.2), when the bush-cutter (10) is handled according to the normal forward direction of its cutting head (11), in which the cutting element consists of a flexible rope wound in the cutting head (11), wherein the cutting element has a first end and a second end which extend from the cutting head (11) in opposite directions, the radial extension of each end of said cutting element being selectively set by an operator, and
• characterized in that the bush-cutter includes a locating and inspection device (14.4) for the correct measuring of the extending ends of the cutting element of said cutting device (11.2) in respect of the spacer (14), and which allow the operator to check that the radial extension of each end of said cutting element from the cutting head (11) is as large as possible, but smaller than the radial distance that the spacer (14) keeps between said head and an obstacle, and to correctly set the radial extension of each end of said cutting element, when necessary.