Patents by Inventor John William Hoffman

John William Hoffman 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).

  • INSULATION PAD FOR PIPES AND VESSELS
    Publication number: 20240295053
    Abstract: An insulation pad includes a binderless pack of glass fibers and an envelope around the binderless pack of glass fibers. The glass fibers are mechanically entangled by needling such that the binderless pack has a density of from 4.5 to 5.5 pounds per cubic foot. The insulation pad is used to insulate pipes and vessels.
    Type: Application
    Filed: May 8, 2024
    Publication date: September 5, 2024
    Inventors: Steven Albert Thaxton, Andrew Scott Davis, Glenn Eric Haley, David Cox, John William Hoffman, William Henry Stauch
  • INSULATION PAD FOR PIPES AND VESSELS
    Publication number: 20150247270
    Abstract: An insulation pad includes a binderless pack of glass fibers and an envelope around the binderless pack of glass fibers. The glass fibers are mechanically entangled by needling such that the binderless pack has a density of from 4.5 to 5.5 pounds per cubic foot. The insulation pad is used to insulate pipes and vessels.
    Type: Application
    Filed: May 19, 2015
    Publication date: September 3, 2015
    Inventors: Steven Albert Thaxton, Andrew Scott Davis, Glenn Eric Haley, David Cox, John William Hoffman, William Henry Stauch
  • Corona igniter having improved gap control
    Patent number: 8839753
    Abstract: A corona igniter 20 includes an electrode gap 28 between the central electrode 22 and the insulator 32 and a shell gap 30 between the insulator 32 and the shell 36. An electrically conductive coating 40 is disposed on the insulator 32 along the gaps 28, 30 to prevent corona discharge 24 in the gaps 28, 30 and to concentrate the energy at a firing tip 58 of the central electrode 22. The electrically conductive coating 40 is disposed on an insulator inner surface 64 and is spaced radially from the electrode 22. The electrically conductive coating 40 is also disposed on the insulator outer surface 72 and is spaced radially from the shell 36. During operation of the igniter 20, the electrically conductive coating 40 provides a reduced voltage drop across the gaps 28, 30 and a reduced electric field spike at the gaps 28, 30.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: September 23, 2014
    Assignee: Federal-Mogul Ignition Company
    Inventors: John Antony Burrows, James D. Lykowski, John William Hoffman
  • CORONA IGNITER HAVING IMPROVED GAP CONTROL
    Publication number: 20120192824
    Abstract: A corona igniter 20 includes an electrode gap 28 between the central electrode 22 and the insulator 32 and a shell gap 30 between the insulator 32 and the shell 36. An electrically conductive coating 40 is disposed on the insulator 32 along the gaps 28, 30 to prevent corona discharge 24 in the gaps 28, 30 and to concentrate the energy at a firing tip 58 of the central electrode 22. The electrically conductive coating 40 is disposed on an insulator inner surface 64 and is spaced radially from the electrode 22. The electrically conductive coating 40 is also disposed on the insulator outer surface 72 and is spaced radially from the shell 36. During operation of the igniter 20, the electrically conductive coating 40 provides a reduced voltage drop across the gaps 28, 30 and a reduced electric field spike at the gaps 28, 30.
    Type: Application
    Filed: December 29, 2011
    Publication date: August 2, 2012
    Inventors: JOHN ANTONY BURROWS, James D. Lykowski, John William Hoffman
  • Ceramic with improved high temperature electrical properties for use as a spark plug insulator
    Patent number: 8012898
    Abstract: An insulator including alumina in an amount between about 90 and about 99% by weight and an oxide mixture or glass mixture including Boron Oxide, Phosphorus Oxide, or both Boron and Phosphorus Oxide.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: September 6, 2011
    Assignee: Federal-Mogul World Wide, Inc
    Inventors: William John Walker, Jr., John William Hoffman
  • CERAMIC WITH IMPROVED HIGH TEMPERATURE ELECTRICAL PROPERTIES FOR USE AS A SPARK PLUG INSULATOR
    Publication number: 20110177932
    Abstract: An insulator including alumina in an amount between about 90 and about 99% by weight and an oxide mixture or glass mixture including Boron Oxide, Phosphorus Oxide, or both Boron and Phosphorus Oxide.
    Type: Application
    Filed: December 1, 2010
    Publication date: July 21, 2011
    Inventors: William John Walker, JR., John William Hoffman
  • Ceramic with improved high temperature electrical properties for use as a spark plug insulator
    Patent number: 7858547
    Abstract: An insulator including alumina in an amount between about 90 and about 99% by weight and an oxide mixture or glass mixture including Boron Oxide, Phosphorus Oxide, or both Boron and Phosphorus Oxide.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: December 28, 2010
    Assignee: Federal-Mogul World Wide, Inc.
    Inventors: William John Walker, Jr., John William Hoffman