Patents by Inventor Richard J. Dewhurst

Richard J. Dewhurst 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).

  • Apparatus for investigating a sample with ultrasound
    Patent number: 5381695
    Abstract: An apparatus for investigating a sample with ultrasound has a probe head formed by a casing, a transducer element of piezoelectric plastics material, and a source for applying a high frequency pulse to the sample. The source is preferably one end of an optical fibre, which fibre extends to a laser remote from the probe head. The transducer element is connected to the sample by an acoustic coupling medium, e.g. water. Thus, the probe head can be moved relative to the sample, and a compact, but efficient, structure is achieved.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: January 17, 1995
    Assignee: British Technology Group Ltd.
    Inventors: Peter A. Payne, Richard J. Dewhurst
  • Apparatus for investigating a sample with ultrasound
    Patent number: 5099693
    Abstract: An apparatus for investigating a sample with ultrasound has a probe head formed by a casing, a transducer element of piezoelectric plastics material, and a source for applying a high frequency pulse to the sample. The source is preferably one end of an optical fibre, which fibre extends to a laser remote from the probe head. The transducer element is connected to the sample by an acoustic coupling medium, e.g. water. Thus, the probe head can be moved relative to the sample, and a compact, but efficient, structure is achieved.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: March 31, 1992
    Assignee: Cogent Limited
    Inventors: Peter A. Payne, Richard J. Dewhurst