Concrete tie

Inactive Publication Date: 2008-04-24
ANSALDO STS USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this configuration is that, with the spread rod located above, or within, the cribs, the automatic tamping machines cannot be used.
That is, the tamping machine could damage the spread rods due to their location above, or with, the ballast.
Moreover, during cold weather, an accumulation of ice and the like within the ballast can cause the ballast material to freeze, making the spread rods extending through the ballast difficult to move.

Method used

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  • Concrete tie
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Examples

Experimental program
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Embodiment Construction

[0017]As used herein and in reference to the movable rails, “generally parallel” is a relative phrase meaning that the movable ends of the movable rails are closer to parallel than the fixed ends of the movable rails. The movable rails, however, converge towards each other slightly at the movable ends.

[0018]As used herein, the “height” of the tie upper surface and the tie bed are measured relative to the bottom of the tie body.

[0019]As shown in FIG. 1, a railroad 10 includes a bed of ballast 12, a tie system 14 having a plurality of generally solid ties 15 and at least one spread rod tie 80 (described below), and at least one pair of primary fixed rails 16 having a first rail 18 and a second rail 20. The solid ties 15 and the at least one spread rod tie 80 are disposed in series and in a spaced relationship on the ballast 12. The spaces between adjacent ties 15 and the at least one spread rod tie 80 are cribs 19. In addition to extending under the solid ties 15 and the at least one ...

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PUM

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Abstract

A spread rod tie assembly having a body with a top surface that has at least two levels is provided. That is, the tie body upper surface preferably includes two generally flat, generally parallel rail platforms disposed at each end of the tie body. The platforms are at a first height and are structured to support a pair of fixed rails. The tie body upper surface also has a recessed, generally flat spread rod bed disposed at a medial portion of the tie body between the rail platforms. The spread rod bed is at a second height that is below the first height. In this configuration, the tie body maintains the rails at the required height above the ballast while allowing for a device, such as, but not limited to, a spread rod to be disposed above the tie body between the rails.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a concrete tie and, more specifically, to a concrete tie having a cavity structured to accommodate a spread rod generally within the tie body.[0003]2. Background Information[0004]A typical railroad includes a pair of spaced rails disposed upon, and coupled to, a plurality of generally solid ties. The space between a pair of ties is called a “crib.” The ties, which are typically wood or concrete, are disposed upon a bed of ballast. The ballast also fills the cribs between the ties. The ballast is, typically, a loose aggregate such as, but not limited to, gravel which must be compacted, or “tamped,” periodically to maintain support of the railroad ties. Equipment is available to perform the tamping. Such equipment is commonly identified as a “tamping machine.” The tamping machines are structured to engage and vibrate the ballast disposed between the ties. Because the spacing between ties i...

Claims

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Application Information

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IPC IPC(8): E01B7/02
CPCE01B7/22
InventorMCQUISTIAN, KEVIN
OwnerANSALDO STS USA INC