Patent ID: 6352240
Filing Date: 2002-03-05
Classification: A61G,F15B,Y10T

Abstract:
A valve block comprising:a fluid supply path, a fluid return path, a valve assembly including a supply member positionable between a supply interruption position in which the supply member interrupts the fluid supply path and a supply position in which the supply member permits fluid flow through the fluid supply path and a return member positionable between a return interruption position in which the return member interrupts the fluid return path and a return position in which the return member permits fluid flow through the fluid return path, a multi-state manual actuator operably connected to the supply member and the return member, the manually operated valve actuator being movable between a supply state in which the supply member is in the supply position and the return member is in the return interruption position, a return state in which the return member is in the return position and the supply member is in the supply interruption position, and a neutral state wherein the supply member and the return member are free to assume any position, an electrical actuator operably connected to the supply member to selectively position the supply member between the supply interruption position and the supply position and operably connected to the return member to selectively position the return member between the return interruption position and the return position, a controller configured to generate an override signal when the electrically operated actuator is actuated, and a manual actuator override configured to place the multi-state manual actuator in the neutral state when the override signal is generated.