Patent ID: 8285435

Claim:
A lawn mower comprising: a frame ( 10 ); actuating means ( 20 ) for moving said frame ( 10 ) relative to a work surface (L); one or more blades ( 30 ) mounted on said frame ( 10 ) for cutting the grass present on said work surface (L); a plurality of sensors (S 1 , S 2 ) for generating detection signals (SR) representative of a distance of a mass (M) relative to said frame ( 10 ); wherein said plurality of sensors comprises a first series of sensors (S 1 ) adapted to detect the presence of grass on said work surface (L); a control unit ( 40 ) adapted to determine, as a function of said detection signals (SR), whether said mass is at a distance from said frame ( 10 ) which is included within a predetermined value range, and to adjust operating conditions of said lawn mower ( 1 ) as a function of said detection signals (SR); a selection circuit ( 50 ) interposed in a circuit between said control unit ( 40 ) and sensors (S 1 , S 2 ) and suitable to selectively enable a connection between each of said sensors (S 1 , S 2 ) and an input of said control unit ( 40 ) wherein, said selection circuit ( 50 ) is interlocked with said control unit ( 40 ) in such a way to regulate at least the operating conditions of: activation/deactivation of the actuating means ( 20 ) depending on the presence of grass on the work surface (L); activation/deactivation of the blades ( 30 ) depending on the presence of grass on the work surface (L).