Patents by Inventor Willem A. Van Kampen

Willem A. Van Kampen 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).

  • Electromagnetic vibrator for seismic and civil-engineering applications
    Patent number: 4821246
    Abstract: An electromagnetic vibrator for seismic and civil-engineering applications is provided with a supporting structure fitted with a coupling element, and a reaction mass, which is to be caused to vibrate, with an electromagnetic drive associated therewith and provided at least with electromagnetic coils. The reaction mass is magnetically suspended on the supporting structure by means of one or more magnets with the associated electromagnetic coils and is at the same time caused to vibrate by the electromagnetic drive. The vibration force is exerted on the pole surface of the one or more magnets and the reaction mass is accelerated to at most the acceleration due to gravity.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: April 11, 1989
    Assignee: Stichting Voor De Technische Wetenschappen
    Inventors: Willem A. Van Kampen, Anne R. Ritsema, Rudolf Unger