Patents by Inventor Patrick Heidrich

Patrick Heidrich 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).

  • Inertial welded cylinder and method of making same
    Patent number: 5211100
    Abstract: A friction or inertial welded cylinder is made of a tube and base member. The base member has an annular groove that is positioned within the cylinder tube and which receives the kerf formed on the interior of the cylinder during welding. The groove height is formed to provide a place to receive the kerf as it curls and to seal material within the groove so foreign materials do not later break loose from the kerf and cause damage to the cylinder assembly in use.
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: May 18, 1993
    Assignee: Clark Equipment Company
    Inventors: Dennis A. Fuller, Patrick Heidrich