Patents by Inventor Niels Liengard

Niels Liengard 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).

  • HEAT EXCHANGER
    Publication number: 20090266105
    Abstract: A heat exchanger (102) for use in a refrigeration unit (101), comprising a metal plate (201) and a metal tube (202) for containing refrigerant (203). The metal plate (201) has a first face (204) and a second face (205), and the tube (202) is attached to said first face (204) of the metal plate by a plurality of spot welds (405,406). The spot welds are laser spot welds and said welds extend through only a portion of the thickness of the plate (201), such that the second face (205) of the plate is undisturbed by the welds.
    Type: Application
    Filed: December 13, 2005
    Publication date: October 29, 2009
    Applicant: BUNDY REFRIGERATION INTERNATIONAL HOLDINGS B.V.
    Inventors: Bengt Ake Viklund, Gote Gunnar Berggren, Niels Liengard