Patents by Inventor Adrianus Gerardus M. van Paassen

Adrianus Gerardus M. van Paassen 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).

  • Hollow-core slab for forming a floor field in which ducts can be incorporated, and method for forming a floor field with ducts using such hollow-core slabs
    Patent number: 6845591
    Abstract: A hollow-core having a first and a second supporting edge to enable a supported floor field to be formed, and including a concrete bottom layer and a concrete top layer connected therewith, while in the bottom layer, from one supporting edge to the other supporting edge, a longitudinal reinforcement is provided. The bottom layer is made of thicker design than the top layer and dimensioned such that it can take up and transmit to the supporting edges the transverse forces, and if desired also the bending forces, expected and foreseen for the hollow-core slabs, so that without any constructional problems, slots extending down to the bottom layer can be provided in the hollow-core slab, for accommodating ducts therein after the rough structure phase. The provision of the slots can be done both at the time of fabricating the hollow-core slabs and on the building site, while filling of the slots can be done in the construction finishing phase with a less high-grade material than concrete.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: January 25, 2005
    Assignee: VBI Ontwikkeling B.V.
    Inventors: Adrianus Gerardus M. van Paassen, Ronald Klein-Holte, Dick Stoll