Patents by Inventor Sten Limmergard

Sten Limmergard 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: 4336906
    Abstract: The present invention relates to an arrangement for crossings between a road and railway, where the road structure is interrupted between two edges, between which is positioned at least one railroad track, the arrangement comprising two rails supported by a row of sleepers arranged substantially perpendicular to the rails, said sleepers resting on a foundation, outer slabs being deposited in the area between the rails and the respective edges of the road structure, and a center slab, preferably divided up into sections in the longitudinal direction of the track and positioned between the rails forming the railroad track, which slabs are provided with their top surfaces level with the top surfaces of the rails and the top surface of the road structure, and elongated supporting elements provided to extend along said edges of the road structure.
    Type: Grant
    Filed: December 20, 1979
    Date of Patent: June 29, 1982
    Assignee: A-Betong AB
    Inventor: Sten Limmergard
  • Patent number: 4236670
    Abstract: An arrangement at crossings between a road and a railway. Between the rails and the respective edges of the road structure and between the rails are arranged first and second slabs level at their top surfaces with the top surfaces of the rails and the top surfaces of the road structure. Elongated supporting elements rest on the foundation and are located at the edges of the first slabs which face the road structure. On the supporting element a first edge to which the road structure adjoins with a second edge opposite to the first edge of the supporting element, forming a support for the edges of the first slabs, and a support for the opposite edges of the slabs facing the rail is provided on the end portions of the sleepers outside the rails.
    Type: Grant
    Filed: October 4, 1978
    Date of Patent: December 2, 1980
    Assignee: A-Betong AB
    Inventors: Sten Limmergard, Stig Thim
  • Patent number: D253230
    Type: Grant
    Filed: April 6, 1978
    Date of Patent: October 23, 1979
    Assignee: A-Betong AB
    Inventors: Sten Limmergard, Stig H. G. Thim
  • Patent number: D253249
    Type: Grant
    Filed: April 6, 1978
    Date of Patent: October 23, 1979
    Assignee: A-Betong AB
    Inventors: Sten Limmergard, Stig H. G. Thim
  • Patent number: D253250
    Type: Grant
    Filed: April 6, 1978
    Date of Patent: October 23, 1979
    Assignee: A-Betong AB
    Inventors: Sten Limmergard, Stig H. G. Thim
  • Patent number: D253491
    Type: Grant
    Filed: April 6, 1978
    Date of Patent: November 20, 1979
    Assignee: A - Betong AB
    Inventors: Sten Limmergard, Stig H. G. Thim