Patents by Inventor David R. Judd

David R. Judd 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).

  • X-ray detection of residual ceramic material inside hollow metal articles
    Patent number: 5242007
    Abstract: A hollow metal article can be made by casting a metal article around a ceramic core and leaching the core from inside the article. These steps form a hollow space in the shape of the ceramic core. An x-ray detectable agent that has a higher x-ray density than the ceramic core is introduced into the core. Any core remaining inside the article after the leaching step is detected by making and analyzing an x-ray radiograph of the article.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: September 7, 1993
    Assignee: United Technologies Corporation
    Inventors: Timothy M. Remmers, David R. Judd, Gerald S. Golden
  • Method and apparatus for filling cavities
    Patent number: 5187921
    Abstract: A method and apparatus are described for filling a blind cavity, for example a blister of a blister pack, with a quantity of powder. The cavity, with its open side downwards, is urged into a reservoir (30) of powder, and withdrawn from the reservoir with the quantity of powder therein. An elongate sheet (12) with a plurality of blisters disposed along the length thereof preferably passes around, and travels with, a wheel (38) partially immersed in the reservoir (30) of powder.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: February 23, 1993
    Assignee: Glaxo Group Limited
    Inventors: Alan A. Wilson, Peter J. Brand, David R. Judd, Stanley G. Bonney