Patents by Inventor Eva K. Haegerstrand

Eva K. Haegerstrand 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