Patents by Inventor Frederik Johan Wiltink

Frederik Johan Wiltink 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: 6551012
    Abstract: A guard rail construction comprises support elements to be provided at a side of a road and a guard member attached hereto, wherein, when a vehicle touches the guard member in and adjacent the collision point thereof, one or more support elements can pivot in rearward direction relative to the road about a pivot point and can absorb at least a part of the collision energy. The guard rail construction can pivot in rearward direction to such an extent that it can be supported on the ground by a support point. The angle &phgr; between the line through the pivot point and the collision point and the line through the pivot point and the support point is greater than 90°.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: April 22, 2003
    Assignee: Nederladnse Organisatie voor Toegepast-Natuurwetenschappelijk on-Derzoek Tno
    Inventors: Laurentius Maria J. A. Hoebergen, Frederik Johan Wiltink