Patents Assigned to Forac Limited
  • Actuator with spring return piston
    Patent number: 7934694
    Abstract: An actuator comprising a cylinder and a spring return piston provided with linkage means, in which one or more return springs are situated on the same side of the piston as the linkage means.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: May 3, 2011
    Assignee: Forac Limited
    Inventor: Alan Bunyard
  • Actuator control device
    Patent number: 7131631
    Abstract: A valve actuator control device adapted to control the position of a valve actuator by means of solenoid valves, in which if the actuator position deviates from a desired position, but remains within a predetermined distance from said desired position, the control device is adapted to only return the actuator to the desired position after a delay period, thereby to increase the life span of said solenoid valves.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: November 7, 2006
    Assignee: Forac Limited
    Inventor: Adam Bunyard
  • Actuator control device
    Publication number: 20060163510
    Abstract: A valve actuator control device adapted to control the position of a valve actuator by means of solenoid valves, in which if the actuator position deviates from a desired position, but remains within a predetermined distance from said desired position, the control device is adapted to only return the actuator to the desired position after a delay period, thereby to increase the life span of said solenoid valves.
    Type: Application
    Filed: September 3, 2003
    Publication date: July 27, 2006
    Applicant: Forac Limited
    Inventor: Adam Bunyard
  • Valve actuator
    Patent number: 6865982
    Abstract: A fluid operated actuator comprising a cylinder, a piston and a linkage rod connected to the piston, in which the cylinder is curved through a number of degrees.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: March 15, 2005
    Assignee: Forac Limited
    Inventors: Adam Bunyard, Alan Bunyard