Patents by Inventor John Elofson

John Elofson 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 fastening a strip of thin sheet metal on a conical separation disc of thin sheet metal, and a separation disc provided in this manner with a strip of thin sheet metal
    Patent number: 5883354
    Abstract: Conical separation discs of thin sheet metal intended for centrifugal separators have, as a rule, spacing members in the form of thin strips welded onto one of their sides. For avoiding local overheating of a separation disc, when a strip is to be welded onto the separation disc by roll welding, the strip is formed with at least one ridge extending in the longitudinal direction of the strip, the width of the ridge being substantially smaller than that of the strip. In this way, the contact area between the strip and the separation disc will become very small in the welding area, and only a limited amount of energy is needed for the welding.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: March 16, 1999
    Assignee: Alfa Laval AB
    Inventor: John Elofson