Patents by Inventor Alan Bunyard

Alan Bunyard has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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 with spring return piston
    Publication number: 20080006790
    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: Application
    Filed: February 26, 2007
    Publication date: January 10, 2008
    Inventor: Alan 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
  • Valve actuator
    Publication number: 20030136258
    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: Application
    Filed: January 21, 2003
    Publication date: July 24, 2003
    Inventors: Adam Bunyard, Alan Bunyard