Patents by Inventor Gunnar Grafstrom

Gunnar Grafstrom 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: 5119446
    Abstract: The invention relates to a spherical rolling bearing which comprises an outer ring with a spherical race track, an inner ring, a plurality of rolling elements between the rings, and seals on one or both sides of the rolling elements. The invention is characterized in that the seals are formed with a rim which can be snapped against the spherical race track and kept in an outer ring by means of this rim and a portion which clamps against the side plane of the outer ring. By this design there is no need for the outer ring to be provided with grooves for holding the seals.
    Type: Grant
    Filed: April 11, 1991
    Date of Patent: June 2, 1992
    Assignee: AB SKF
    Inventors: Gunnar Grafstrom, Bengt Engstrom
  • Patent number: 4755067
    Abstract: The invention refers to a seal for self-aligning spherical rolling bearings. It is characterized therein that it incorporates two cooperating annular and mainly radially directed plates affixed to one ring each. One of the plates is equipped with at least one annular sealing lip, which exerts a mainly axial pressure against the second plate.
    Type: Grant
    Filed: March 3, 1987
    Date of Patent: July 5, 1988
    Assignee: SKF Nova
    Inventors: Sture Asberg, Matts Floderus, Gunnar Grafstrom, Olle Andersson