Patents by Inventor Kenneth John Helfer

Kenneth John Helfer 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).

  • Publication number: 20100251622
    Abstract: Standard ground track slide gates roll along a piece of inverted angle iron fastened to the ground the entire length of travel from the fully open to the fully closed position. Typically this is accomplished by a stationary post set on either side of the gate with rollers attached to where the top horizontal frame member passes. With this arrangement of rollers, a situation exists in which there is a heavy steel gate panel moving past two stationary posts. This can be a potentially dangerous situation since the chance of entrapment is a distinct possibility.
    Type: Application
    Filed: April 1, 2009
    Publication date: October 7, 2010
    Inventor: Kenneth John Helfer