Patents by Inventor Per O. Aalrust

Per O. Aalrust 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).

  • Method of and apparatus for the surface cleaning of workpieces
    Patent number: 4258505
    Abstract: A method of and apparatus for the surface cleaning of workpieces, e.g. the degreasing, scale-removal and rust removal from a metallic surface, especially so as to produce a bright, clean and relatively smooth surface to receive a coating, positions the workpiece in a fluidized bed of an abrasive, such as particle of corundum or quartz sand, and directs fine jets of gas at the surface from nozzles spaced therefrom within the fluidized bed.
    Type: Grant
    Filed: March 2, 1979
    Date of Patent: March 31, 1981
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Werner Scheiber, Per O. Aalrust