Patents by Inventor Theodorus Gerrit Abrahamsen

Theodorus Gerrit Abrahamsen 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).

  • Cold pressure weld, and low-pressure piping system capable of being made with this cold pressure weld
    Patent number: 3954122
    Abstract: Headers for low pressure piping system, preferably of the type that has multiple channels and is split in two parts, that can be jointed by means of grooves the side walls of which interlock at such a small angle to a perpendicular on the central plane that, upon pressing the parts of the weld together, the walls thereof become welded together as a result of friction, pressure and plastic deformation.
    Type: Grant
    Filed: October 5, 1973
    Date of Patent: May 4, 1976
    Assignee: Ultra Centrifuge Nederland N.V.
    Inventors: Theodorus Gerrit Abrahamsen, Tom DEBlieck