Hollow structural members, a rail system and methods of manufacturing

• US 8,066,200 B2
• Filed: 03/12/2008
• Issued: 11/29/2011
• Est. Priority Date: 03/12/2008
• Status: Active Grant

• Current Assignee: Hilltrac, Inc.
• Original Assignee: Hilltrac, Inc.
• Inventors: Hepner, Alan, Metivier, David
• Primary Examiner(s): Morano, IV; Joe
• Assistant Examiner(s): Smith; Jason C
• Application Number:
  US12/075,619
• Publication Number:
  US 20090230205A1
• Time in Patent Office: 1,357 Days
• Field of Search: 104/118, 104/119, 104/124, 104/125, 104/126, 105/141, 105/144, 105/29.1, 238/2, 238/123
• US Class Current: 238/2
• CPC Class Codes: B23P 15/20 railroad requirements, e.g. buffers
• CPC Class Codes: B61B 5/00 Elevated railway systems without suspended vehicles with monorail B61B13/04; tracks therefor E01B25/00
• CPC Class Codes: E01B 25/08 Tracks for mono-rails with centre of gravity of vehicle above the load-bearing rail
• CPC Class Codes: E01B 25/10 Mono-rails; Auxiliary balancing rails; Supports or connections for rails
• CPC Class Codes: E01B 5/02 Rails
• CPC Class Codes: E04C 3/08 with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders E04C3/10, E04C3/11 take precedence
• CPC Class Codes: Y10T 29/49616 Structural member making

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.

Claims

1. A rail system, comprising:

a plurality of hollow triangular prism-shaped rail segments, each rail segment forming a piecewise linear segment of the rail system; and

coupling bars attached inside each vertex of adjacent end-to-end rail segments to form a track, each coupling bar further comprising two planar wings oriented at an angle relative to one another, each of the two wings further comprising a plurality of linearly oriented mounting holes configured for selective use in mounting the wing to corresponding surfaces of two adjacent rail segments.

2. The rail system according to claim 1, wherein the coupling bars comprise variable center spacing, the variable center spacing comprising a center-to-center spacing between two innermost mounting holes linearly oriented along a wing, the two innermost mounting holes attached to adjacent surfaces of two adjacent rail segments.

3. The rail system according to claim 2, wherein selective use of the variable center spacing of the two innermost mounting holes in the coupling bars provides variable bends between the piecewise linear segments of the rail system.

4. The rail system according to claim 1, further comprising at least one curved structural member having triangular cross-section with at least two nonplanar surfaces, the at least one curved structural member configured for end-to-end attachment to the hollow triangular prism-shaped rail segments using the coupling bars at adjacent vertices.

5. The rail system according to claim 1, further comprising a rack attached to a surface of the track, the rack configured with teeth for receiving and engaging a pinion gear.

6. The rail system according to claim 5, further comprising a plurality of rack brackets, each rack bracket mounted between the rack and the track.

7. The rail system according to claim 6, wherein each of the plurality of rack brackets holds the rack at a fixed distance parallel to the track.

8. The rail system according to claim 6, wherein each of the plurality of rack brackets further comprises a C-shaped cross section with first and second flanges oriented parallel to each other and connected to each other by an intermediate section disposed perpendicular to the flanges.

9. The rail system according to claim 8, wherein the first flange comprises slotted holes configured to adjustably mate with mounting holes formed in the rail segments.

10. The rail system according to claim 8, wherein the second flange comprises a slotted hole configured to adjustably mate with rack mounting holes formed in the rack.

11. The rail system according to claim 5, wherein the rack comprises a plurality of rack segments configured to be placed together serially to form a rack of arbitrary length.

12. The rail system according to claim 11, wherein the arbitrary length of the rack differs from a total length of the track.

13. The rail system according to claim 1, further comprising a plurality of vertical supports selectively mounted between the track and a ground surface for supporting the track above ground.

14. The rail system according to claim 13, wherein each vertical support comprises:

a vertical beam;

a vertical support bracket configured to attach the vertical beam to the track;

a footing frame configured for placement into a concrete footing and configured for attachment to the vertical beam; and

wherein the length of the vertical beam is adjustable for precise placement of the track above ground.

15. The rail system according to claim 1, further comprising at least one reaction assembly for providing lateral support to a track, the reaction assembly comprising:

four reaction frames, each adjustable in length and configured with a first end attachable to vertical support brackets attached to the track; and

a lateral support bracket configured for placement in a concrete footing and for receiving a second end of each of the four reaction frames.

16. The rail system according to claim 1, wherein a centroid of the track traverses a non-linear path.

17. The rail system according to claim 16, wherein the path comprises traversing from point-to-point.

18. The rail system according to claim 16, wherein the path comprises a main trunk line with at least one spur.

19. The rail system according to claim 16, wherein the path comprises at least one loop.

20. The rail system according to claim 1, wherein each of the plurality of coupling bars may be configured to allow up to a specified amount of bend in the track at the coupling bar depending on center spacing between adjacent rows of mounting holes formed in the coupling bar.