control system for automatically closing and opening a door is disclosed and has means for providing such opening and closing even if power is lost to the hydraulic control system further disclosed is a fluid control device of the hydraulic system which prevents the door from being opened or closed too quickly that might otherwise harm an individual that comes into the path of the moving door application_number US 58292496 A description referring to the drawings wherein the same reference numbers are used to indicate the same elements throughout there is shown in fig1 a perspective view of a hydraulic control system of the present invention the hydraulic control system operates with or without the assistance of electrical power and thus is particularly suited to serve as an integrated element of elevator control systems for operating a door or for a control system for operating a door for handicapped individuals both of which control systems may encounter power outages and both of which control systems desire the safety feature of manually opening or closing a door during such power outages the hydraulic control system 10 comprises a motor 12 responsive to an electrical signal carried by cable 14 and generated by a control network 16 a gear drive 18 a hydraulic device 20 a coupling device 22 and a switch 24 not shown in fig1 but shown in fig2 which produces an electrical signal carried by cable 26 to the control network.