Patents by Inventor Bertil Sigvard Carlsson

Bertil Sigvard Carlsson 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).

  • Lifting device, particularly for lifting and transporting building boards, such as plaster and wood particle boards
    Patent number: 3940171
    Abstract: A device for lifting and transporting building boards comprises a tubular column extending upwardly from a bottom plate and provided at its upper end with a rearwardly projecting handle. The bottom plate has a forward edge portion providing a bearing surface for the building board and an upwardly curved rearward portion. A vertical supporting plate extends upwardly from the bottom plate in front of the upwardly extending column and is preferably braced to a rearward portion of the bottom plate. A horizontal distance member mounted on the column comprises a pressure plate mounted at the end of the stem portion of a tubular tee having a sleeve portion surrounding the column so as to be rotatable and longitudinally movable thereon.
    Type: Grant
    Filed: April 26, 1973
    Date of Patent: February 24, 1976
    Inventor: Bertil Sigvard Carlsson