Patents by Inventor Don R. Hofstetter, Sr.

Don R. Hofstetter, Sr. 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).

  • Patent number: 6726116
    Abstract: An insulation system for an embedded track construction for a transit railway having spaced parallel railway rails includes a rail boot for substantially enclosing each of the rails along its length, rail clips extending on each side of each of the rails for securing the rails to supporting ties, and fillers extending on each side of each of the rails, frictionally engaging and removably mounting the rails to an associated one of said rail clips. The fillers cooperate to provide a coplanar roadway with said rails.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: April 27, 2004
    Assignee: Iron Horse Engineering Co.
    Inventor: Don R. Hofstetter, Sr.
  • Patent number: 6588677
    Abstract: An insulating rail boot encasing a rail embedded in concrete, asphalt or paver construction, including, shared right-of-way, dedicated right-of-way and at-grade crossing. The rail and the rail boot are secured in place by retaining clips. The rail boot has two exposed top surfaces and a plurality of longitudinal cavities within the body of the boot. The top surfaces of the rail boot are sloped away from the rail and are coextruded with a multi-durometer material that is more rigid and tougher that the elastomer of which the boot is primarily constructed. An outside edge of each top rail boot surface is positioned flush with a surface of the road material. This cooperation between the top surfaces of the rail boot and the road surface facilitates flow of water and debris away from the rail.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: July 8, 2003
    Assignee: Iron Horse Engineering Co.
    Inventors: Don R. Hofstetter, Sr., Mark Grundmann
  • Publication number: 20030098359
    Abstract: An insulating rail boot encasing a rail embedded in concrete, asphalt or paver construction, including, shared right-of-way, dedicated right-of-way and at-grade crossing. The rail and the rail boot are secured in place by retaining clips. The rail boot has two exposed top surfaces and a plurality of longitudinal cavities within the body of the boot. The top surfaces of the rail boot are sloped away from the rail and are coextruded with a multi-durometer material that is more rigid and tougher that the elastomer of which the boot is primarily constructed. An outside edge of each top rail boot surface is positioned flush with a surface of the road material. This cooperation between the top surfaces of the rail boot and the road surface facilitates flow of water and debris away from the rail.
    Type: Application
    Filed: November 2, 2001
    Publication date: May 29, 2003
    Inventors: Don R. Hofstetter Sr., Mark Grundmann