Patents by Inventor Jaakko Tenkula

Jaakko Tenkula 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).

  • Yankee cylinder with a plasma-sprayed carbide coating
    Patent number: 5123152
    Abstract: The invention relates to a Yankee cylinder for a paper-making machine, in which a coating which is a mixture of a metal powder and a carbide or nitride and withstands well the wearing effect of the doctor blade and other corrosive and thermal stresses produced in paper-making is formed on top of the cylinder mantle. The invention also relates to methods for coating a Yankee cylinder with such a coating by using a detonation, plasma or supersonic method.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: June 23, 1992
    Assignee: Tampella Telatek Oy
    Inventors: Jaakko Tenkula, Bjarne Hellman, Jorma Majava
  • Method of arc spraing and filler wire for producing a coating which is highly resistant to mechanical and/or chemical wear
    Patent number: 4810850
    Abstract: A filler wire of a new type for use in arc-spraying, by means of which coatings highly resistant to mechanical and/or chemical wear can be produced. The wire comprises a soft sheath made from unalloyed or alloyed metal, inside which there is a very fine-grained filler material which contains, in addition to iron, other metals and/or special carbides and/or oxides, the powder being prepared by atomizing a melt of the said constituents.
    Type: Grant
    Filed: May 28, 1987
    Date of Patent: March 7, 1989
    Assignee: Telatek Oy
    Inventors: Jaakko Tenkula, Bjarne Hellman, Juha Huusko