Patents Assigned to Southwestern Manufacturing Co.
  • Actuator control system
    Patent number: 4036106
    Abstract: A control system for controlling the operation of a valve actuator. The system includes a control valve for conveying operating fluid to the actuator in response to an actuator control signal. A single conduit operably connected to the actuator control valve both supplies operating fluid to the control valve and conveys an actuator control signal to the control valve.
    Type: Grant
    Filed: April 3, 1975
    Date of Patent: July 19, 1977
    Assignee: Southwestern Manufacturing Co.
    Inventor: Lawrence F. Athy, Jr.