Patents by Inventor Zdenek Jandera

Zdenek Jandera 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
  • Distributed array hydrophone
    Patent number: 4862428
    Abstract: A distributed array hydrophone comprising an array of hydrophones each comprising a ceramic doublet assembly of hollow radially oppositely polarized members end held in a bobbin by decoupling means, the bobbins being linearly interconnected by semiflexible spacing members, the array being encapsulated in a vibration transmitting potting medium in a tube formed of a pressure-wave transmitting medium.
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: August 29, 1989
    Assignees: The Commonwealth of Australia, Plessey Australia Pty. Limited
    Inventors: Stephen G. Jackett, Stephen N. Kastel, Zdenek Jandera