Patent ID: 8545188

Claim:
A hydraulic controller having at least two inputs for a hydraulic fluid for controlling a speed of a hydraulic pump driven by an internal combustion engine, comprising: at least two pressure chambers, wherein each of said at least two pressure chambers is connected to a respective one of the at least two inputs; a piston with a piston rod in each of said at least two pressure chambers, each said piston being displaceable under pressure from a rest position against a force of a spring into a switched position, wherein each said piston rod extends into a separate chamber, said separate chamber being delimited from the respective pressure chamber and accommodating said spring, and said piston rod abuts a rear bottom of a cup-shaped piston, releasably engages at an end of a common rod or a common pull in the switched position via said cup-shaped piston and is arranged to actuate the common rod or the common pull.