Patents by Inventor David R. Slotboom

David R. Slotboom 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).

  • Portable impedance meter for non-destructive testing of sound absorbing panels
    Patent number: 4651566
    Abstract: A portable acoustic impedance measuring device 10 is provided for measuring the impedance properties of a panel 12. The device 10 includes a horn section 14 having a flexible plate 18. The plate 18 can assume the curvature of the duct panel 12. The horn section 14 is supported adjacent the panel's surface by a spindle shaft 28 which spans or bridges the inside diameter of the duct 12. The curvature of the plate 18 may be locked to hold the curvature of any of a variety of different panels having various sizes and shapes.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: March 24, 1987
    Assignee: The Boeing Company
    Inventors: Anders O. Andersson, David R. Slotboom, Paul C. Topness