Patents by Inventor Sonny O. Wallgren

Sonny O. Wallgren 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).

  • Patent number: 4458504
    Abstract: This invention relates to an arrangement in an absorption refrigerating apparatus, which operates with a pressure equalizing gas, and is provided with at least two absorbers. A height difference occurs between the liquid level in the standpipe of the boiler and the inlet level of the absorbers in order to supply absorption solution which is weak and refrigerant to the absorbers. At least a major part of the supply conduit is replaced by branch conduits, each one of which has a flow resistance which is at least double the difference between the flow resistances in said branch conduits.
    Type: Grant
    Filed: December 10, 1982
    Date of Patent: July 10, 1984
    Assignee: Aktiebolaget Electrolux
    Inventors: Sonny O. Wallgren, Eva K. Haegerstrand, Bengt R. Reistad
  • Patent number: 4286569
    Abstract: An external intake-discharge duct for a burner-operated refrigerator having a sealed system. The intake communicates with the atmosphere outside of a trailer or a motor home and is located in a service door for the burner of a refrigerating apparatus. Atmospheric air is conducted downward through the air intake to the burner, and hot combustion gases are conducted upwards through a flue pipe and out through a discharge or outlet. The duct terminates in a cap-like structure located externally in a wall of a trailer or motor home.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: September 1, 1981
    Assignee: Aktiebolaget Electrolux
    Inventors: Ernst L. A. Bergman, Peter E. Blomberg, Lars S. Enger, Bengt R. Reistad, Sonny O. Wallgren
  • Patent number: D258822
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: April 7, 1981
    Assignee: Aktiebolaget Electrolux
    Inventor: Sonny O. Wallgren