Patent ID: 7108089

Claim:
A walk-behind self-propelled working machine comprising: a machine body; an engine disposed on the machine body and having an output shaft for providing a motive power; a generator having a drive shaft driven by the motive power to generate an electric power; power transmitting means for transmitting the motive power from the output shaft of the engine to the drive shaft of the generator; an electric motor driven by the electric power from the generator to produce a motive power; a traveling unit driven by the motive power from one of the engine and the electric motor to propel the working machine; a working unit driven by the motive power from the other of the engine and the electric motor for performing a work; the engine being vertically disposed with a cylinder disposed horizontally and the output shaft disposed vertically and downwardly; the generator being vertically disposed with the drive shaft disposed vertically and downwardly; and an axis of the drive shaft of the generator and an axis of the output shaft of the engine being disposed on a line extending perpendicularly to an axis of the cylinder as viewed in plan.