Patents by Inventor Peter Graneau

Peter Graneau 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).

  • Method of an apparatus for self-sustaining high vacuum in a high voltage environment
    Patent number: 4167370
    Abstract: A method of and apparatus for self-sustaining high vacuum in a high voltage environment. The method and apparatus employ ion pumping; the apparatus can be an integral part of high voltage equipment and acts to maintain a high vacuum condition in such equipment.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: September 11, 1979
    Assignee: Massachusetts Institute of Technology
    Inventors: Peter Graneau, Michael B. Silevitch, Elizabeth E. Ames
  • Vacuum insulated A-C superconducting cables
    Patent number: 3947622
    Abstract: A three-phase high-voltage superconducting cable having three hollow superconductors in a trefoil configuration and three heat shields disposed radially outward from the superconductors, all enclosed in an evacuated pipe. The heat shields are also in a trefoil configuration; they are electrically isolated from one another, from the superconductors, and from ground in order to suppress the flow of induced currents. The pipe provides mechanical protection of the foregoing elements, serves as vacuum vessel and carries the a-c shielding current induced by the cable load current.
    Type: Grant
    Filed: January 3, 1975
    Date of Patent: March 30, 1976
    Assignee: Massachusetts Institute of Technology
    Inventor: Peter Graneau