Patents by Inventor Friedhelm Bierwirth

Friedhelm Bierwirth 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).

  • Patent number: 6966154
    Abstract: The invention relates to an earthquake protection system that is entirely immune to seismic activity. According to the inventive method buildings and other objects are supported by Virtual Pendulums (Pv) designed as QuakeProtect Modules (56). Although requiring only little height for installation, these earthquake protection modules allow a freedom of movement for the load bearing support points of the supported structure as if they were the oscillating ends of long pendulums with long cycles of their own. As the result of which the supported object is efficiently isolated from the considerably higher frequent earthquake ground oscillations. The functional behavior of the system is not affected by the extent of the base acceleration or the frequency of the ground oscillation. Even in an earthquake of greatest magnitude the supported object will remain still. The system can be configured for any load and any conceivable ground oscillation amplitudes.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: November 22, 2005
    Assignee: PLANdesign International LLC
    Inventor: Friedhelm Bierwirth