Patents by Inventor Tapio Vakiparta

Tapio Vakiparta 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).

  • Working tool for pipe wall
    Patent number: 5782123
    Abstract: The invention relates to a working tool for working a pipe wall, so that a grooving is created on the inner wall of the pipe. The grooving is carried out by means of a rotating working tool of a grooving machine, and according to the invention, the structure of said tool brings about an efficient use and replacing of the balls provided in the tool for working the pipe to be grooved; it also enables the replacing of the balls without replacing the whole tool.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: July 21, 1998
    Assignee: Outokumpu Copper Products OY
    Inventor: Tapio Vakiparta