Patents by Inventor Bjorn O. Thoresen

Bjorn O. Thoresen 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: 5133530
    Abstract: An adjustable mold for casting stairways of concrete enables the total length of a stairway and also the dimension of the separate steps to be adjusted. The mold includes a longitudinal horizontal frame supporting two identical parallel articulated arm systems positioned scissor-like and being linked together at intersection points of arms of the system along a longitudinal center axis thereof. At oppositely located and linked outer ends of the arms are provided pivotable supports for a number of step units, each of which includes an upstep and an instep. An inner edge of each instep substantially by its own weight rest against the upstep of an adjacent step unit. The total length of the articulated arm link system may be adjusted, thereby simultaneously adjusting the distance between adjacent step units. Also, the angular position of the step units relative to the support frame can be adjusted.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: July 28, 1992
    Inventor: Bjorn O. Thoresen
  • Patent number: 4951438
    Abstract: An arrangement joins concrete beams and columns for building structures. Adjacent parts of columns and beams to be joined are provided with imbedded joint fittings which can be engaged with each other for joining the beams and the acolumns when erecting the building structure. Each joint unit comprises the following parts: (a) a support casing or box which is imbedded in the end of the beam the box being open and flush with the transverse end surface of the beam, (b) a complementary support casing or box imbedded in the column for each beam, the box being open toward the side surface of the column and running flush therewith, and (c) a separate mountable and removable bridge element positioned in a support box in the column and in a support box in a beam and forming a bridging element between the column and the beam in the joint therebetween.
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: August 28, 1990
    Assignee: Ostspenn Holding a/s
    Inventor: Bjorn O. Thoresen