Patents by Inventor Per Levin

Per Levin 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).

  • Absorption refrigerating apparatus constituted to prevent corrosion inside it
    Patent number: 6282918
    Abstract: In an absorption refrigerating apparatus (18) the pump pipe (42) is made of a material, which is more corrosion resistant to the working medium than the material of the rest of the apparatus. In order to prevent galvanic corrosion in the boiler the pump pipe (42) can be electrically insulated (72, 74) from the rest of the boiler.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: September 4, 2001
    Assignee: Aktiebolaget Electrolux
    Inventors: Per Levin, Staffan Eriksson, Carl Lindhagen
  • Absorption refrigerator with automatic defrosting
    Patent number: 5966951
    Abstract: A refrigerator cabinet operated by an absorption refrigerating apparatus has a freezing compartment cooled by an upper part of an evaporator of the apparatus and a refrigerating compartment that is cooled by a lower part of the evaporator. The temperature in the refrigerating compartment is kept at a set value by activating or shutting off the refrigerating apparatus. The upper part of the evaporator is provided with a thermally conductive plate for cooling the freezing compartment. The temperature in the freezing compartment is kept at a set value by heat transfer to the plate. For example, a variable speed fan in the freezing compartment moves the air through a duct and past the plate. A film heater on the plate is used for defrosting and for controlling temperature in the freezing compartment.
    Type: Grant
    Filed: May 6, 1998
    Date of Patent: October 19, 1999
    Assignee: AB Electrolux
    Inventors: Ingemar Hallin, Per Levin, Mattias Nyqvist