Patent ID: 7134261

Claim:
A hybrid type working machine, having a generator that is driven by an engine and a motor that is driven by an electric power that is supplied from the generator, comprising: the engine is controlled so as to perform a substantially fixed speed operation, while the motor is driven by having only an electric power directly supplied thereto that has been generated from the generator means that detects the fluctuation in the revolution of the engine to anticipate the decrease in the number of revolutions of the engine; means that, when the decrease in the number of revolutions has been anticipated, decreases the amount of electric power that is supplied from the generator to the motor, and wherein the engine composes a driving source for a working-machine main body and the motor composes a driving source for movement of the working machine, whereby, when the decrease in the number of revolutions of the engine has been anticipated, the machine is constructed so that the moving speed of the machine may be decreased.