Patents by Inventor Peter J. Mullen

Peter J. Mullen 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).

  • Method for forming thin-wall tubing
    Patent number: 5425261
    Abstract: In a preferred embodiment, a method and apparatus for forming thin-wall tubing for later welding of the seam thereof which includes tightly rolling upon itself a sheet of thin metal stock about a roller between layers of a flexible fabric. When released from the roller, the sheet metal springs back to form a near-perfect tube without the kinks, scratches, and/or dents commonly caused by conventional rolling methods.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: June 20, 1995
    Assignee: Robert R. Hellman, Sr.
    Inventors: Robert R. Hellman, Sr., Peter J. Mullen