Patents by Inventor Henry Hartmann, Jr.

Henry Hartmann, Jr. 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).

  • Multiple wedge element lens for an ultrasonic inspection transducer
    Patent number: 4319490
    Abstract: A plurality of flat or curved, wedge-shaped elements form the surface of a ens of an ultrasonic inspection transducer. The multiple wedge-shaped elements permit the ultrasonic energy from the transducer to be focused (1) in a substantially straight line (line focus) parallel to the axis of the lens and (2) deflected from a plane parallel to the wedge-shaped elements and at an oblique angle to the line focus. This achieves a concentration of ultrasonic energy along a line that can be projected into material as shear waves while maintaining equidistance from the transducer's sensing wafer. This results in a concentration of ultrasonic energy that can detect small cracks in a workpiece. Further, with this lens, wider ultrasonic scan may be made with minimal errors in detection. This lens also provides accurate location information on depth of flaws.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: March 16, 1982
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Henry Hartmann, Jr.