Patents by Inventor Christopher David Chapman

Christopher David Chapman 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 and apparatus for packaging ultra fine powders into containers
    Patent number: 6796107
    Abstract: The apparatus comprises a powder dispenser portion with an outlet port which opens into a loading chamber. A slide gate valve assembly selectively closes the port and a disc valve assembly is provided above the slide gate valve assembly. Containers are loaded into the loading chamber and are located beneath the port and are then purged with inert gas. The slide gate valve assembly and disc valve assembly are then opened to allow container to be filled with ultra fine powder.
    Type: Grant
    Filed: November 4, 2002
    Date of Patent: September 28, 2004
    Assignee: Tetronics Limited
    Inventors: David Edward Deegan, Timothy Paul Johnson, Christopher David Chapman
  • Twin plasma torch apparatus
    Patent number: 6744006
    Abstract: A twin plasma torch assembly includes two plasma torch assemblies supported in a housing. Each of the two plasma torch assemblies has an electrodes. Plasma gas is introduced into a processing zone around the two electrodes. A shroud gas is introduced to surround the plasma. A feed tube is provided to supply feed material to the processor.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: June 1, 2004
    Assignee: Tetronics Limited
    Inventors: Timothy Paul Johnson, David Edward Deegan, Christopher David Chapman, John Kenneth Williams
  • Twin plasma torch apparatus
    Publication number: 20030160033
    Abstract: A twin plasma torch assembly comprising two plasma torch assemblies (10, 20) supported in a housing. Each torch has first and second spaced electrodes. Plasma gas is introduced into a processing zone between two electrodes. A shroud gas is introduced to surround the plasma. A feed tube (112) is provided to supply feed material to the processor.
    Type: Application
    Filed: April 1, 2003
    Publication date: August 28, 2003
    Inventors: Timothy Paul Johnson, David Edward Deegan, Christopher David Chapman, John Kenneth Williams