Angle Patents (Class 238/157)
Weber type (Class 238/158)
  • Hollow structural members, a rail system and methods of manufacturing
    Patent number: 8066200
    Abstract: The invention is hollow structural members, a rail system based thereon and method of manufacturing such hollow structural members. Embodiments of the structural members may be hollow triangular prism-shaped with a cross-section that is triangular, isosceles, hexagonal or otherwise. Embodiments of rail systems based on hollow structural members are also disclosed. Embodiments of the rail systems disclosed herein may also include reaction assemblies for local dissipation of stresses due to thermal expansion of track materials.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: November 29, 2011
    Assignee: HillTrac, Inc.
    Inventors: Alan Hepner, David Metivier