Patents by Inventor Sven-Erik Westerlund

Sven-Erik Westerlund 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: 6145500
    Abstract: The heating device has a housing and a liquid containing compartment defined inside the housing. A heating chamber is disposed inside the housing and the compartment. A fire chamber is disposed inside the heating chamber that produces hot combustion gases. A separation channel is defined between an outer wall of the fire chamber and the outer wall of the heating chamber for conveying the air from the first air inlet into the heating chamber. The separation channel also creates an important insulation between the fire chamber and the compartment so that the combustion material in the fire chamber burns at a sufficiently high temperature to prevent the formation of tar accumulations on the inside walls of the various ducts. Also, the separation channel maintains a suitable temperature of the outer wall of the fire chamber to reduce the risk of cracking and to prolong the useful product life of the fire chamber.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: November 14, 2000
    Inventor: Sven-Erik Westerlund