Patents by Inventor Magnus T. Walfridson

Magnus T. Walfridson 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).

  • Arrangement for preventing freezing of the working medium in an absorption refrigerating apparatus
    Patent number: 4914919
    Abstract: The invention refers to an arrangement at a refrigerator cabinet (10) having an absorption refrigerating apparatus (16,18) operated by a heating cartridge (40) from at least one electric current source or by a gas burner (38). The arrangement shows a control apparatus (74) which automatically starts the gas burner (38) when the supply of current to the heating cartridge (40) ceases. The refrigerating apparatus (18) is with exception of its evaporator (16) enclosed in a heat insulated chamber (20) through which surrounding air circulates for cooling of the refrigerating apparatus (18).
    Type: Grant
    Filed: January 6, 1989
    Date of Patent: April 10, 1990
    Assignee: Aktiebolaget Electrolux
    Inventors: Magnus T. Walfridson, Stig H. Farndahl