Patents by Inventor Andrew J Mayhew

Andrew J Mayhew 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).

  • Sub-ducting apparatus
    Patent number: 7967530
    Abstract: A sub-ducting apparatus comprising a sub-duct, and a remotely operable path-finding head for facilitation of the subduct into a duct. The head is detachable at the end of the subduct and includes an expandable portion or a cutter, as a result of which, twisted or jammed cables may be removed from the duct.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: June 28, 2011
    Assignee: British Telecommunications public limited company
    Inventors: Andrew J Mayhew, Nicholas J Medlen
  • Method and system of subduct and cable installation
    Patent number: 7866022
    Abstract: Cable is installed into a duct, by increasing cross-sectional areas of subducting provided in the duct, so as to allow the cable to be received into the subducting, and then decreasing the cross-sectional area of the subducting containing the cable so as to reduce the volume occupied by the subducting in the duct. Cables may be inserted into the subducting, for example, by forcing compressed gas through the subducting, which simultaneously inflates the subducting.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: January 11, 2011
    Assignee: British Telecommunications Public
    Inventors: Philip A Barker, Christopher Fisk, Andrew J Mayhew, Simon I Fisher