Patents by Inventor Kari Kajavo

Kari Kajavo 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).

  • Casing hook used to impregnate choke or transformer
    Patent number: 4296545
    Abstract: A plurality of hooks, which are of one-piece construction with a casing substantially enclosing a transformer or choke, are engaged by a suspension means which allows the casing, exclusive of the hooks, to be immersed in an impregnating agent. After impregnation, the casing and enclosed choke or transformer are removed from the impregnant and air dried. The hooks and suspension means are not immersed in the impregnating agent.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: October 27, 1981
    Assignee: Oy Helvar
    Inventors: Esko Lampinen, Kari Kajavo