Patents Assigned to Ammann Verdichtung AG
  • 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