Patents by Inventor Ian Powlesland

Ian Powlesland 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).

  • Strain gauge
    Patent number: 7536919
    Abstract: A strain gauge (10), comprising a silicon strain sensing element (14) for sensing strain with first and second load points (16) and provided with a pair of piezo-resistors (22) located between said load points such that, when said strain sensing element (14) is subjected to tension or compression at said load points, a first of said pair of piezo-resistors (22a, 22b) is subjected to compression and a second of said pair of piezo-resistors (22a, 22b) is subjected to tension, wherein a change in relative resistance of said pair of piezo-resistors is induced by subjecting said strain sensing element to compression or tension.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: May 26, 2009
    Assignee: The Commonwealth of Australia - Department of Defence
    Inventors: Ian Powlesland, Alan Wilson
  • Strain gauge
    Publication number: 20070186664
    Abstract: A strain gauge (10), comprising a silicon strain sensing element (14) for sensing strain with first and second load points (16) and provided with a pair of piezo-resistors (22) located between said load points such that, when said strain sensing element (14) is subjected to tension or compression at said load points, a first of said pair of piezo-resistors (22a,22b) is subjected to compression and a second of said pair of piezo-resistors (22a,22b) is subjected to tension, wherein a change in relative resistance of said pair of piezo-resistors is induced by subjecting said strain sensing element to compression or tension.
    Type: Application
    Filed: December 1, 2004
    Publication date: August 16, 2007
    Inventors: Ian Powlesland, Alan Wilson