Patents by Inventor Claude Zethraeus

Claude Zethraeus 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 and apparatus for manufacturing a heat exchanger
    Patent number: 4170055
    Abstract: A method and apparatus for manufacturing a heat exchanger. A plurality of parallel pipes are advanced from a magazine to an axially slotted open ended shell blank which is radially compressed against the pipes. The contacting surfaces of the pipe openings are then welded together, after which the ends of the package of pipes are immersed in a casting mass, which, after solidifying, is severed along a line therethrough so as to open the pipes at both ends. A wall enclosing each open end is then connected to each end of the pipe package.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: October 9, 1979
    Assignee: AGA-CTC Varmevaxlare AB
    Inventor: Claude Zethraeus