Fluid controller with joystick capability and actuator therefor

摘要

A system for controlling the flow of fluid to a fluid pressure operated device (C) is disclosed. The system includes a controller of the type comprising first and second valve means (35, 37) for defining a first fluid path (MFP) and a second fluid path (AFP) in response to movement of a first input means (W) and a second input means (J), respectively. The second input means includes an electromagnetic actuator (65) to actuate the second valve means in response to an electrical input signal (CS). The system includes sensing means (S, PS, G, P), which can sense a predetermined condition and generate an interrupt signal in response thereto. Furthermore interrupt means are provided which interrupt the electrical input signal in response to the interrupt signal.