Working machine

Abstract

A working machine may include a tank; a working device including an actuator; an accumulator; a recovery path connecting the actuator and the accumulator; a return valve installed between the recovery path and the tank to control the flow rate of fluid discharged from the recovery path to the tank; a command generating device that generates a command; and a control unit that receives the command from the command generating device and controls the return valve so that the return valve has an opening amount corresponding to the command according to a preset relationship, thereby adjusting the operating speed of the actuator and the charging speed of the accumulator. The command generating device may be a first operator input device that receives a request from an operator for one of the operating speed of the actuator, the charging speed of the accumulator, and the opening amount of the return valve.

Dependencies are inferred from the claim text.