Patents by Inventor Ian R. Bedwell

Ian R. Bedwell 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).

  • Composite sonar transducer for operation as a low frequency underwater acoustic source
    Patent number: 4878207
    Abstract: A low frequency sonar transducer comprising a head (1) having first and second stacks of piezo ceramic elements (2,3) in two spaced apart planes between common nodal end supports (7,8), the stacks being oppositely polarized to act in push-pull action with one stack expanding and the other contracting to cause the head (1) to bow. The transducer is prestressed with fibres (6) to prevent fracture.
    Type: Grant
    Filed: September 7, 1988
    Date of Patent: October 31, 1989
    Assignee: Plessey Australia Pty. Ltd.
    Inventors: Zdenek Jandera, Ian R. Bedwell