Patents by Inventor Stanely D. Hjelmstad

Stanely D. Hjelmstad 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).

  • Generator set and method
    Patent number: 4835405
    Abstract: A generator set including an internal combustion engine which drives an alternator or generator to generate electricity. The engine and the generator are air cooled by air driven by a fan along two parallel air cooling circuits through the generator set. The components of the set are enclosed in a two-piece housing or enclosure having two openings, an air inlet and an air outlet.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: May 30, 1989
    Assignee: Onan Corporation
    Inventors: Stephen M. Clancey, Stanely D. Hjelmstad, Mark S. Lent, Michael C. Miller