U.S. patent application number 11/585428 was filed with the patent office on 2008-04-24 for concrete tie.
This patent application is currently assigned to Union Switch & Signal, Inc.. Invention is credited to Kevin McQuistian.
Application Number | 20080093507 11/585428 |
Document ID | / |
Family ID | 39317016 |
Filed Date | 2008-04-24 |
United States Patent
Application |
20080093507 |
Kind Code |
A1 |
McQuistian; Kevin |
April 24, 2008 |
Concrete tie
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.
Inventors: |
McQuistian; Kevin; (Apollo,
PA) |
Correspondence
Address: |
David C. Jenkins;Eckert Seamans Cherin & Mellott, LLC
44th Floor, 600 Grant Street
Pittsburgh
PA
15219
US
|
Assignee: |
Union Switch & Signal,
Inc.
Pittsburgh
PA
|
Family ID: |
39317016 |
Appl. No.: |
11/585428 |
Filed: |
October 24, 2006 |
Current U.S.
Class: |
246/449 |
Current CPC
Class: |
E01B 7/22 20130101 |
Class at
Publication: |
246/449 |
International
Class: |
E01B 7/02 20060101
E01B007/02 |
Claims
1. A tie assembly structured to accommodate an above-the-tie spread
rod, said spread rod structured to extend between a pair of
railroad switch assembly movable rails, said railroad also having a
pair of fixed rails, said tie assembly comprising: an elongated
concrete tie body having a first end, a medial portion, a second
end, and an upper surface; said upper surface having two generally
flat, generally parallel rail platforms disposed at said body first
end and said body second end, said platforms being at a first
height and structured to support said pair of fixed rails; said
upper surface having a recessed generally flat spread rod bed
disposed at said medial portion between said rail platforms, said
spread rod bed being at a second height which is below said first
height; and wherein said spread rod may be substantially disposed
over said spread rod bed at a height below said rail platforms.
2. The tie assembly of claim 1 wherein said tie body includes a
cover assembly, said cover assembly structured to generally cover
said spread rod bed.
3. The tie assembly of claim 1 wherein: said tie body has a first
longitudinal side and a second longitudinal side; said spread rod
bed includes a first sidewall extending along said body first
longitudinal side and a second sidewall extending along said body
second longitudinal side; and wherein said spread rod bed defines
an upwardly open cavity.
4. The tie assembly of claim 3 wherein: said spread rod bed first
sidewall includes at least one opening extending from said spread
rod bed to the outer face of said first longitudinal side; and said
opening structured to act as a drain for any liquid that becomes
trapped in said cavity.
5. The tie assembly of claim 3 further including a cover assembly,
said cover assembly structured to generally cover said spread rod
bed.
6. The tie assembly of claim 5 wherein: said cover assembly
includes a cover member and a plurality of first fastener
components; said tie body includes a plurality of second fastener
components; and wherein said cover assembly first fastener
components are structured to engage said tie body second fastener
components when said cover member is disposed over said cavity.
7. The tie assembly of claim 6 wherein said cover member is a
generally rigid member having a cross-section that is, generally,
an inverted U-shape.
8. A railroad switch assembly for a railroad, said railroad having
at least one pair of fixed rails coupled to a plurality of
generally solid ties, said switch assembly comprising: an actuator
structured to move a plurality of elongated rods between a first
position and a second position; a plurality of elongated rods
coupled to said actuator; a pair of movable rails coupled to said
plurality of elongated rods, said movable rails disposed within,
and extending generally parallel to, said fixed rails; wherein said
actuator is structured to move said plurality of rods between a
first position and a second position, said plurality of rods
coupled to said movable rails and wherein the movement of said
plurality of rods between a first position and a second position
move said movable rails between a first position and a second
position; at least one spread rod structured to hold said movable
rails in a generally fixed relation; said at least one spread rod
coupled to, and extending between, said movable rails; said spread
rod disposed at a spread rod tie assembly, said spread rod tie
assembly having an elongated concrete body having a first end, a
medial portion, a second end, and an upper surface; said upper
surface having two generally flat, generally parallel rail
platforms disposed at said body first end and said body second end,
said platforms being at a first height and structured to support
said pair of fixed rails; said upper surface having a recessed
generally flat spread rod bed disposed at said medial portion
between said rail platforms, said spread rod bed being at a second
height which is below said first height; wherein said at least one
spread rod may be substantially disposed over said spread rod bed
at a height below said rail platforms.
9. The switch assembly of claim 8 wherein said body includes a
cover assembly, said cover assembly structured to generally cover
said spread rod bed.
10. The switch assembly of claim 8 wherein: said body has a first
longitudinal side and a second longitudinal side; said spread rod
bed includes a first sidewall extending along said body first
longitudinal side and a second sidewall extending along said body
second longitudinal side; and wherein said spread rod bed defines
an upwardly open cavity.
11. The switch assembly of claim 10 wherein: said spread rod bed
first sidewall includes at least one opening extending from said
spread rod bed to said first longitudinal side; and said opening
structured to act as a drain for any liquid that becomes trapped in
said cavity.
12. The switch assembly of claim 10 wherein said body includes a
cover assembly, said cover assembly structured to generally cover
said spread rod bed.
13. The switch assembly of claim 12 wherein: said cover assembly
includes a cover member and a plurality of first fastener
components; said body includes a plurality of second fastener
components; and wherein said cover assembly first fastener
components are structured to engage said body second fastener
components when said cover member is disposed over said cavity.
14. The switch assembly of claim 13 wherein said cover member is a
generally rigid member having a cross-section that is, generally,
an inverted U-shape.
15. A railroad switch assembly for a railroad, said railroad having
at least one pair of fixed rails coupled to a plurality of
generally solid ties, said ties supported on a bed of ballast, said
ballast further disposed between adjacent ties, said switch
assembly comprising: an actuator structured to move a plurality of
elongated rods between a first position and a second position; a
plurality of elongated rods coupled to said actuator; a pair of
movable rails coupled to said plurality of elongated rods, said
movable rails disposed within, and extending generally parallel to,
said fixed rails; wherein said actuator is structured to move said
plurality of rods between a first position and a second position,
said plurality of rods coupled to said movable rails and wherein
the movement of said plurality of rods between a first position and
a second position move said movable rails between a first position
and a second position; at least one spread rod structured to hold
said movable rails in a generally fixed relation; said at least one
spread rod coupled to, and extending between, said movable rails;
at least one spread rod tie assembly structured to support said
fixed rails and be disposed below said movable rails; and said
spread rod disposed above at least one spread rod tie assembly and
not above said ballast.
16. The switch assembly of claim 15 wherein: said spread rod tie
assembly has an elongated concrete body having a first end, a
medial portion, a second end, and an upper surface; said upper
surface having two generally flat, generally parallel rail
platforms disposed at said body first end and said body second end,
said platforms being at a first height and structured to support
said pair of fixed rails; said upper surface having a recessed
generally flat spread rod bed disposed at said medial portion
between said rail platforms, said spread rod bed being at a second
height which is below said first height; and wherein said at least
one spread rod may be substantially disposed over said spread rod
bed at a height below said rail platforms.
17. The switch assembly of claim 16 wherein said body includes a
cover assembly, said cover assembly structured to generally cover
said spread rod bed.
18. A tie system structured to support a pair of fixed rails and a
pair of movable rails, said tie system comprising: a plurality of
solid ties structured to support said fixed rails, each said solid
tie having an elongated body with a longitudinal axis; said solid
ties being disposed in a spaced relationship having each
longitudinal axis extending generally parallel to each other; each
space between adjacent solid ties defining a crib; a bed of ballast
disposed beneath said solid ties and within said cribs; at least
one spread rod tie assembly structured to support said fixed rails
and be disposed below said movable rails; said at least one spread
rod tie assembly disposed between adjacent solid ties; and said at
least one spread rod tie assembly structured to accommodate a
spread rod disposed above said at least one spread rod tie assembly
and not above said ballast.
19. The tie system of claim 18 wherein: said spread rod tie
assembly has an elongated concrete body having a first end, a
medial portion, a second end, and an upper surface; said upper
surface having two generally flat, generally parallel rail
platforms disposed at said body first end and said body second end,
said platforms being at a first height and structured to support
said pair of fixed rails; said upper surface having a recessed
generally flat spread rod bed disposed at said medial portion
between said rail platforms, said spread rod bed being at a second
height which is below said first height; and wherein said at least
one spread rod may be substantially disposed over said spread rod
bed at a height below said rail platforms.
20. The tie system of claim 19 wherein said body includes a cover
assembly, said cover assembly structured to generally cover said
spread rod bed.
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 is generally regular, the tamping machines may be constructed
to automatically advance along a railroad track while stopping and
tamping the ballast in each crib. The tamping machines, however,
must be manually controlled or not used at the location of a
railroad switch machine.
[0005] A railroad switch machine includes an actuator, a pair of
movable rails and a linkage having a plurality of elongated
connecting rods extending between the actuator and the movable
rails. The actuator is structured to move the connecting rods, and
therefore the movable rails, between a first position and a second
position. Further, the movable rails may be elongated and extend
over a number of ties. To maintain the movable rails in the proper
spaced relationship, at least one spread rod is utilized. The
spread rod is a generally rigid rod that is coupled to, and extends
between, the movable rails. Preferably, a spread rod is disposed
about every 10 feet along the movable rails. Traditionally, the
spread rods were disposed over, or within, the cribs. This
configuration allowed the majority of the spread rod to be disposed
at or below the tops of the adjacent ties with a lug, or vertical
extension, extending upwardly to the movable rails. Thus, most of
the spread rod was not in a position to be impacted by anything
hanging beneath a passing rail vehicle.
[0006] 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.
[0007] There is, therefore, a need for a tie that is structured to
allow for a spread rod to be disposed above the tie.
[0008] There is a further need for a tie having a reduced height
between the fixed rails thereby allowing a spread rod to be
disposed above the tie.
SUMMARY OF THE INVENTION
[0009] These needs and others are met by the at least one
embodiment of the present invention which provides for a tie having
a body with a top surface having at least two levels. 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 the 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. The spread rod is shaped, generally, like a
U-shaped bar with two upwardly extending "tines" and an elongated,
generally flat "bight." That is, the bight portion extends just
above the spread rod bed in a direction generally parallel to the
longitudinal axis of the tie body. The tines, which are structured
to be coupled to lugs attached to the movable rails, extend
upwardly to a location between the fixed rails. Thus, except for
the upwardly extending extensions, the bulk of the spread rod is
disposed at a level even with, or below, the level of the
platforms. In this configuration, despite being above the ballast,
the spread rod is generally not in a location where it could
sustain damage from a passing rail vehicle.
[0010] In a preferred embodiment, the longitudinal edges of the tie
body along the medial portion include sidewalls extending to a
height generally parallel to the height of the platforms. In this
configuration, the spread rod bed is, essentially, within a cavity
having an open top. In this configuration, the sidewalls create a
barrier that resists loose ballast and other debris from shifting
on to the spread rod bed. This configuration may be further refined
by having a cover assembly disposed over the spread rod bed and
cavity. The cover assembly is, preferably, an elongated, generally
rigid inverted U-shaped member with the tines extending adjacent to
the medial portion sidewalls and the bight extending, generally,
over the spread rod bed. The lateral edges of the cover assembly do
not cover the cavity completely and thereby form gaps between the
cover assembly and the platforms. The spread rod tines extend
upwardly through the gaps. Further, the gaps allow the spread rod
to shift along with the movable rails during a switching operation.
Alternately, the cover assembly may be made from a rugged flexible
material such as, but not limited to, canvas.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] A full understanding of the invention can be gained from the
following description of the preferred embodiments when read in
conjunction with the accompanying drawings in which:
[0012] FIG. 1 is an isometric view of a railroad and switch
assembly.
[0013] FIG. 2 is a side view of a tie assembly.
[0014] FIG. 3 is an isometric view of a tie assembly.
[0015] FIG. 4 is a top view of a tie assembly.
[0016] FIG. 5 is an end view of a tie assembly.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[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 spread rod tie assembly 80,
the ballast 12 is also disposed in the cribs 19. At a switch
assembly 22 the pair of primary fixed rails 16 diverge and becomes
at least two pairs of secondary fixed rails 16A, 16B. Each pair of
secondary fixed rails 16A, 16B also has a first rail 18A, 18B and a
second rail 20A, 20B respectively. The switch assembly 22 includes
an actuator 24 and a pair of movable rails 26 having a first
movable rail 28 and a second movable rail 30. As is known in the
art, the movable rails 28, 30 have a movable end 32, 34 adjacent to
the actuator 24 and a generally fixed end 36, 38 distal to the
actuator 24. The pair of movable rails 26 are disposed within the
fixed rails 16 adjacent to the actuator 24. The pair of movable
rails 26 are generally parallel to each other adjacent to the
actuator 24, and then converge with each other at the fixed ends
36, 38 adjacent to the point where the secondary fixed rails 16A,
16B separate from each other. At, or immediately adjacent to, the
movable rail movable ends 32, 34, the movable rails 26 are coupled
to the actuator 24. A plurality of elongated rods 35 extends
between the actuator 24 and the movable rails 28, 30. The actuator
24 is structured to move the elongated rods 35 between a first and
second position which, in turn, move the movable rail movable ends
32, 34 between a first and second position. In the first position,
the first movable rail 28 is disposed immediately adjacent to the
first rail 18 and the second movable rail 30 is spaced from the
second rail 20. In the second position, the first movable rail 28
is spaced from the first rail 18 and the second movable rail 30 is
disposed immediately adjacent to the second rail 20.
[0020] The movable rail movable ends 32, 34, as well as a length of
the movable rails 26 extending toward the fixed ends 36, 38, are
maintained in a generally parallel relationship by at least one
spread rod 40. As shown in FIG. 2, the spread rod 40 has an
elongated U-shaped body 42, a first lug assembly 44, and a second
lug assembly 46. The U-shaped body 42 has a first upward extension
48, an elongated bight portion 50, and a second upward extension
52. The elongated bight portion 50 is, preferably, divided into at
least a first section 54 and a second section 56. The bight portion
first section 54 and second section 56 each have an inner end 58,
60. The inner ends 58, 60 overlap each other. The bight portion
first section 54 and second section 56 are coupled to each other at
the inner ends 58, 60. An insulator 62 is preferably disposed
between the bight portion first section 54 and second section 56 at
the inner ends 58, 60. At least one bight portion section, as shown
in the first section 54, may be further divided into a first
segment 64 and a second segment 66. The first segment 64 and the
second segment 66 are coupled together by a laterally adjustable
coupling device 68 such as, but not limited to, opposing serrated
faces 70, 72. In this configuration, the length of the spread rod
40 may be adjusted.
[0021] Except for the overlapping inner ends 58, 60 and the
coupling device 68, the bight portion 50 extends, generally, in a
single plane. The first upward extension 48 and the second upward
extension 52 extend generally upward from the plane of the bight
portion 50. The first upward extension 48 and the second upward
extension 52 may also be angled slightly outwardly. The first
upward extension 48 and the second upward extension 52, preferably,
have a vertical rise of between 6 inches and 10 inches, and more
preferably about 8 inches. The first upward extension 48 and the
second upward extension 52 each have an outer tip that is
structured to be pivotally coupled to the first lug assembly 44 and
the second lug assembly 46, respectively. Preferably, the first
upward extension 48 and the second upward extension 52 each have a
pivot pin opening 74.
[0022] The first lug assembly 44 is coupled to the first movable
rail 28. The second lug assembly 46 is coupled to the second
movable rail 30. Each lug assembly 44, 46 includes a pivot pin 76
that is coupled to either the first upward extension 48 or the
second upward extension 52. In this configuration, the spread rod
40 is structured to maintain the first movable rail 28 and the
second movable rail 30 is a generally fixed, spaced relation.
[0023] The spread rod 40 is disposed above a spread rod tie
assembly 80. The spread rod tie assembly 80 includes an elongated
body 82, preferably made from concrete, having a first end 84, a
medial portion 86, a second end 88, and an upper surface 90. The
upper surface 90 has two generally flat, generally parallel rail
platforms 92, 94 disposed at the tie body first end 84 and the tie
body second end 88, respectively. The platforms 92, 94 are at a
first height and are structured to support the pair of fixed rails
16. That is, the platforms 92, 94 may have a tie plate 100 or
similar structure coupled thereto. The upper surface 90 also has a
recessed generally flat spread rod bed 102 disposed along the tie
body medial portion 86 between the rail platforms 92, 94. The
spread rod bed 102 is at a second height which is below the first
height. That is, the spread rod bed 102 extends in a plane that is
below the plane of the rail platforms 92, 94. Given the U-shaped
body of the spread rod 40, the spread rod 40 may be substantially
disposed over the spread rod bed 102 at a height below the rail
platforms 92, 94. That is, the spread rod bight portion 50 may
extend just above, and generally parallel to, the spread rod bed
102. In this configuration, the spread rod 40 is not disposed
within the ballast 12, but is also below a height wherein a passing
rail vehicle, or anything hanging below a passing rail vehicle, is
likely to impact upon the spread rod 40.
[0024] The tie body 82 also has a first longitudinal side 104 and a
second longitudinal side 106. The spread rod bed 102 may include a
first sidewall 108 extending along the tie body first longitudinal
side 104 and a second sidewall 110 extending along the tie body
second longitudinal side 106. In this configuration, the spread rod
bed 102 defines an upwardly open cavity 112. The first longitudinal
side 104 may further include at least one opening 114 extending
from the spread rod bed 102 to the outer face of the first
longitudinal side 104. The at least one opening 114 is structured
to act as a drain for any liquid that becomes trapped in the cavity
112.
[0025] The spread rod tie assembly 80 may also include a cover
assembly 120 structured to generally cover the spread rod bed 102.
Preferably, the cover assembly 120 includes a cover member 122 and
a plurality of first fastener components 124. The cover member 122
may be a flexible member, such as but not limited to, canvas, or a
combination of flexible and rigid elements but, in a preferred
embodiment, the cover member 122 is elongated, and generally rigid
and has a cross-section that is, generally, an inverted U-shape.
The tie body 82 includes a corresponding plurality of second
fastener components 126 structured to engage the plurality of first
fastener components 124. For example, where the plurality of first
fastener components 124 are openings 130 disposed adjacent to the
distal ends of the cover member 122, the plurality of second
fastener components 126 on the tie body 82 may include a plurality
of threaded rods 132 extending from the forward and aft faces of
the tie body 82.
[0026] While specific embodiments of the invention have been
described in detail, it will be appreciated by those skilled in the
art that various modifications and alternatives to those details
could be developed in light of the overall teachings of the
disclosure. Accordingly, the particular arrangements disclosed are
meant to be illustrative only and not limiting as to the scope of
invention which is to be given the full breadth of the claims
appended and any and all equivalents thereof.
* * * * *