Patent ID: 7908834

Claim:
A grass cutting unit ( 1 ) comprising: a frame ( 2 ); a cutter ( 3 ) located in connection with said frame, the cutter ( 3 ) for cutting grass; support elements ( 4 ; 41 , 42 ) for supporting the cutting unit ( 1 ) against the ground; and a cutting height setting device comprising i) lead screws ( 7 ; 71 , 72 , 73 , 74 ) functionally arranged between the frame ( 2 ) and the support elements ( 4 ; 41 , 42 ), ii) rotatable nut elements ( 8 ; 81 , 82 ; 83 , 84 ) provided in connection with the frame and with the lead screws, iii) at least one driving motor ( 6 ; 61 , 62 ), and iv) a power transmission means ( 9 ; 91 , 92 ) arranged between the at least one driving motor and the rotatable nut elements so that the at least one driving motor ( 6 ; 61 ; 62 ) is connected, by intermediation of the power transmission means ( 9 ; 91 , 92 ), to the rotatable nut elements ( 8 ; 81 , 82 ; 83 , 84 ), said driving motor configured to operate the lead screws ( 7 ; 71 , 72 ; 73 , 74 ) so that by rotating the nut elements, the lead screws are operated and the position of the support elements with respect to the cutter, as well as the cutting height (h), is adjustable within the desired limits.