Patents by Inventor Alf Lindstrom

Alf Lindstrom 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: 6216877
    Abstract: Screen panels are disclosed for the screening of fibrous material. The screen panels are one-piece screen panels which can then be incorporated into a cylindrical screen jacket without the use of welding. The screen panels include a plurality of apertures for the fibrous material and are made from a wear-resistant material. Methods for producing these screen panels are also disclosed.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: April 17, 2001
    Assignee: Valmet Fibertech Aktiebolag
    Inventor: Alf Lindström
  • Patent number: 6123121
    Abstract: Apparatus is disclosed for distributing a flow of pulp uniformly into a container including an inlet for the pulp flow into one end of the container, a cylindrical wall laterally defining a distribution chamber for the container, a planar wall within the container facing the inlet spaced from the cylindrical wall and extending laterally at least to a location corresponding to the cylindrical wall, thus defining a gap between the planar wall and the cylindrical wall so the pulp flow can pass laterally through the gap into the container for distribution therein, and a movable wall associated with the cylindrical wall for adjusting the size of the gap.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: September 26, 2000
    Assignee: Valmet Fibertech Aktiebolag
    Inventors: Kjell Forslund, Anders Bergdahl, Klas Kristrom, Alf Lindstrom
  • Patent number: D267047
    Type: Grant
    Filed: November 29, 1979
    Date of Patent: November 23, 1982
    Inventor: Alf Lindstrom