Patents by Inventor Per Wilhelm Bruel

Per Wilhelm Bruel 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).

  • Pipe joint for radiator element of thin material
    Patent number: 4047516
    Abstract: A pipe joint for joining a relatively thick walled externally threaded pipe to a relatively thin walled tubing of a flat solar absorbing panel is both slotted to receive part of the flat solar panel and bored to receive the thin walled solar tubing. The block is further provided with an internal thread communicating with the aperture into which the tubing is inserted.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: September 13, 1977
    Inventors: Per Wilhelm Bruel, Holger Schioler, Johannes Tejlgaard Jensen