Patents by Inventor Timo Mauno Pirila

Timo Mauno Pirila 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).

  • Superimposed sheet welding system including rotatable welding electrode and cooling rings
    Patent number: 5801353
    Abstract: A method and apparatus for welding thin sheets (34) and (35) at the periphery of aligned holes therein by melting the sheets together by a rotating electrode (23) in a protective gas atmosphere. The sheets (34) and (35) are pressed together by copper rings (32) and (33) which also function as heat transfer members to conduct the heat away from the welding seam and thus prevent distortion thereat. The electrode (23) is adjusted to the proper vertical position by a guide (9) in a jig (7), and it is locked to the position determined by the sheets (34) and (35) by a clamp (31).
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: September 1, 1998
    Assignee: Vahterus Oy
    Inventor: Timo Mauno Pirila