Patents by Inventor Ewen James Crawford Kellar

Ewen James Crawford Kellar 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).

  • Workpiece structure modification
    Patent number: 7667158
    Abstract: A method of modifying the structure of workpiece (1) is provided. The method comprises a first step of causing relative movement between a power beam and the workpiece (1) so that a region (3) of the workpiece (1) is melted and the melted material displaced to form a projection (2) at a first location in the region (3) and a hole (4) at a different location in the region. The melted material is then allowed to at least partially solidify after which the first step is repeated one or more times, with the region corresponding to each repeat intersecting the region (3) of the first step.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: February 23, 2010
    Assignee: The Welding Institute
    Inventors: Bruce Guy Irvine Dance, Ewen James Crawford Kellar
  • Ultrasound detectable instrument with bubble generator
    Patent number: 7235052
    Abstract: Ultrasound detectable instrument including a bubble generator having two elements which, upon contact with each other in the presence of a fluid, react with each other to produce gas bubbles which may be detected by sonic imaging equipment. The two elements comprise first and second radially displaced layers of the elements within a fluid permeable carrier material.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: June 26, 2007
    Assignee: BTG International Limited
    Inventors: Ewen James Crawford Kellar, Seyed Mehdi Tavakoli
  • Ultrasound detectable instrument
    Publication number: 20040138566
    Abstract: An ultrasound detectable instrument (10) includes bubble generating means comprising two elements (32a, 32b) which, upon contact with each other in the presence of a fluid, react with each other to produce gas bubbles which may be detected by sonic imaging equipment. The two elements comprise first and second radially displaced layers of said elements within a fluid permeable carrier material.
    Type: Application
    Filed: October 23, 2003
    Publication date: July 15, 2004
    Applicant: BTG International Limited
    Inventors: Ewen James Crawford Kellar, Seyed Mehdi Tavakoli
  • Ultrasound detectable instrument
    Publication number: 20020177776
    Abstract: An ultrasound detectable instrument (10) includes bubble generating means comprising two elements (32a, 32b) which, upon contact with each other in the presence of a fluid, react with each other to produce gas bubbles which may be detected by sonic imaging equipment. The two elements comprise first and second radially displaced layers of said elements within a fluid permeable carrier material.
    Type: Application
    Filed: October 29, 2001
    Publication date: November 28, 2002
    Inventors: Ewen James Crawford Kellar, Seyed Mehdi Tavakoli