Patents by Inventor Friedelin Thielmann

Friedelin Thielmann 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).

  • Device for cleaning the gas nozzle of a welding torch
    Patent number: 5138969
    Abstract: A device for cleaning the gas nozzle of a welding torch in which weld splatters have accumulated has a rotatable cutter which is axially movable into and out of a gas nozzle and the cutter is provided with a nozzle and passages for spraying an anti-adhesive agent into the gas nozzle either while the cutter is scraping or as the cutter is being withdrawn from the gas nozzle.
    Type: Grant
    Filed: December 31, 1990
    Date of Patent: August 18, 1992
    Inventor: Friedelin Thielmann