Patent ID: 7707728

Claim:
Engagement system ( 1 ) for removably connecting gardening tools and similar type devices to a power unit comprising a drive motor, said system comprising a base element ( 2 ) suitable for being fixed to a crankcase housing the drive motor, a fastening element ( 3 ) of a tool that is actuated by a shaft of said drive motor, the fastening element ( 3 ) configured for coupling with the base element ( 2 ), said elements ( 2 , 3 ) comprising respective mutual engagement/disengagement means ( 5 , 6 ) for cooperating with each other to removably lock said elements ( 2 , 3 ) in an engagement position, wherein said base element ( 2 ) comprises at least one electrical safety switch ( 19 ) actuated elastically by a rod ( 11 ) between a first position in which the electrical safety switch ( 19 ) is closed and prevents the operation of the drive motor, and a second position in which the electrical safety switch ( 19 ) is open and allows the operation of the drive motor, said second position only being obtainable when the fastening element ( 3 ) is engaged with the base element ( 2 ).