Patents by Inventor Pauli Hamalainen

Pauli Hamalainen 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).

  • Publication number: 20090166344
    Abstract: The invention relates to a short-arc welding method and apparatus. According to the method, an electrically periodically changing arc, which is short-circuited periodically by a molten droplet (22) from the welding wire (21), is formed between the welding wire (21) and the base material (20), in which case each welding cycle is formed of a short-circuit stage (14) and an arc stage (15), whereby both the short-circuit (12, 14) and the arc (15) stages includes both a high-current pulse (5, 10) and lower-current periods (2, 7, 12, 16). According to the invention, at the end part of each short-circuit stage (14) a falling current shape (6, 7) is formed.
    Type: Application
    Filed: September 8, 2006
    Publication date: July 2, 2009
    Inventors: Pauli Hamalainen, Esa Eloniemi, Olli Jarvinen