Patents by Inventor Poul N. Knudsen

Poul N. Knudsen 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: 5403127
    Abstract: A retaining wall structure (1) for large-scale construction works, such as roads, railway tracks or quay constructions, where substantial amounts of earth or material are to be retained, and where said wall structure is constituted by panels. The wall structure comprises a front wall (2) and a rear wall (3) locked at a distance from said front wall by means of easily mountable crossbeams (4, 4'). The crossbeams are locked relative to one another in vertical direction by means of locking beams (5) so as to achieve a three-dimensional structure with interconnected and locked panels, filler (8) being filled into the space between the front wall and the rear wall. As a result, a retaining wall structure is obtained which is internally locked in three dimensions and capable of withstanding both tensile and pressure stresses. Furthermore, the retaining wall structure can be built by unskilled construction workers.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: April 4, 1995
    Inventor: Poul N. Knudsen
  • Patent number: 4465398
    Abstract: A revetment protecting coasts and structures thereon against erosion from waves and flowing water. The revetment comprises a plurality of heavy and thick plate bodies (1a-1d) located side by side and directly on the inclined surfaces of the coast. Each plate body comprises at a first pair of opposite ends hinge pins (1', 1") for a flexible securing of the plate body (1d) to the adjacent plate body (1c). Furthermore, the plate body comprises a plurality of substantially vertical water penetration holes (4', 4") as well as two hinge openings (2', 2") located at a second pair of opposite ends of said body. The hinge openings are shaped in such a manner that they beyond penetration of water also may receive pins (1', 1") of the adjacent plate bodies (1a). In this manner a revetment is obtained which is water-permeable, coherent, appropriately heavy and flexible, and which furthermore in an easy manner may be mounted by unskilled persons.
    Type: Grant
    Filed: January 18, 1982
    Date of Patent: August 14, 1984
    Inventor: Poul N. Knudsen