Patents by Inventor Petter Hessen

Petter Hessen 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).

  • Conservator system
    Patent number: 3934453
    Abstract: A conservator system for transformers includes a conservator tank. The apparatus is filled with oil which is saturated with a non-combustible gas. The conservator tank is connected by conduits to the top and if suitable also to the bottom of the transformer tank, respectively. The top of the conservator tank is filled with free non-combustible gas. A bag of flexible material is arranged in the top of the conservator tank and the interior of this bag is connected to the atmosphere so that it separates the oil and the gas in the tank from the atmosphere.
    Type: Grant
    Filed: October 25, 1974
    Date of Patent: January 27, 1976
    Assignee: Allmanna Svenska Elektriska Aktiebolaget
    Inventor: Petter Hessen