Patents by Inventor Hans-Ulrich Leibundgut

Hans-Ulrich Leibundgut 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).

  • Method of measuring mechanical data of a soil, and of compacting the soil, and measuring or soil-compaction device
    Patent number: 6431790
    Abstract: Method and apparatus for compacting soil and for determining a mechanical characteristic of soil, including a method and apparatus for periodically compacting soil with a soil compacting device so as to make the soil and the soil compacting device vibrate together as a single oscillatory system, analyzing the vibration of the soil and soil compacting device, and adjusting an oscillatory driving force so as to drive the single oscillatory system towards a characteristic resonance frequency &OHgr;.
    Type: Grant
    Filed: April 21, 1999
    Date of Patent: August 13, 2002
    Assignee: Ammann Verdichtung AG
    Inventors: Roland Anderegg, Hans-Ulrich Leibundgut