Patents by Inventor Karel Kuiper

Karel Kuiper 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: 5203818
    Abstract: Suspension hook, in particularly for suspending sectional bars from an existing ceiling, said bars together forming a grid for supporting ceiling panels. Said bars each have an upper tubular part. The suspension hook consists of a connecting portion and of a hook portion, said hook portion being intended to be inserted in said tubular part of the concerned sectional bar via a pair of apertures in the upper wall of said tubular part. The hook portion has a flat bearing surface which extends at about aright angle from the strip shaped connecting portion. The central region of said bearing surface is provided with a V-shaped downwardly projecting nose, the height of which corresponds with the height of the tubular part of the concerned sectional bar. The free end of the hook portion is provided with an upwards directed lip.
    Type: Grant
    Filed: November 4, 1991
    Date of Patent: April 20, 1993
    Inventor: Karel Kuiper
  • Patent number: 5076036
    Abstract: Suspension system for ceiling panels, comprising a supporting grid of interconnected bars intersecting one another at right angles, said grid being supported below an existing ceiling structure, and said sectional bars when fitted having a vertical web portion which has fitted at the bottom end on either side thereof horizontal side flanges for the purpose of supporting the ceiling panels. The web portion of the sectional bars at the top end being provided with a hollow tubular part and the sectional bars being connected to each other by means of connecting elements each having at least one insertion part accommodated in the tubular part. The tubular part is elongated in shape, viewed in the vertical direction of the web portion. The sectional bars are suspended at regular intervals by means of hooked suspension elements. Said hooked suspension elements as well as the connecting elements being formed of sheet material.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: December 31, 1991
    Inventor: Karel Kuiper