Patents by Inventor John E. Ballerstein

John E. Ballerstein 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).

  • Tubular welded railing system
    Patent number: 5062732
    Abstract: A railing system is composed of vertically aligned metal tubes and cross-members which are metal tube rails. The posts are formed with round protruding bosses whose outer diameter (OD) is the same as the outer diameter of the posts. The rails also have the same outer diameter. The bosses and rail ends may be brought into roundness, so that they match in a smooth circumferential seam, by round plugs forced into the bosses and rail ends. The post-rail joints are then welded in a circumferential weld.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: November 5, 1991
    Assignee: Standard Steel Rail Technology
    Inventor: John E. Ballerstein
  • Tubular railing system
    Patent number: 4952092
    Abstract: A railing system is composed of vertically aligned metal tubes and cross-members which are metal tube rails. The posts are formed with round protruding bosses whose outer diameter (OD) is the same as the outer diameter of the posts. The rails also have the same outer diameter. The bosses and rail ends are brought into roundness, so that they match in a smooth circumferential seam, by round plugs forced into the bosses and rail ends. The post-rail joints may be welded in a circumferential weld; but preferably the posts and rails are joined by bolts connected to the plugs.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: August 28, 1990
    Assignee: Standard Steel Rail Technology
    Inventor: John E. Ballerstein