CA2029276C - Rail pads - Google Patents
Rail padsInfo
- Publication number
- CA2029276C CA2029276C CA 2029276 CA2029276A CA2029276C CA 2029276 C CA2029276 C CA 2029276C CA 2029276 CA2029276 CA 2029276 CA 2029276 A CA2029276 A CA 2029276A CA 2029276 C CA2029276 C CA 2029276C
- Authority
- CA
- Canada
- Prior art keywords
- rail
- pad
- main face
- sealing means
- supporting portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
- E01B9/686—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape with textured surface
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/387—Compensation of inhomogeneities
- G01R33/3875—Compensation of inhomogeneities using correction coil assemblies, e.g. active shimming
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/681—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material
- E01B9/683—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material layered or composite
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Railway Tracks (AREA)
- Gasket Seals (AREA)
Abstract
A pad, suitable for spacing the bottom of a railway rail from a rail foundation on which the rail stands, comprises a plate-like rail-supporting portion (1) and softer, resiliently-deformable, sealing means (3), which sealing means (3) are bonded to the rail-supporting portion (1) at a peripheral region thereof and are such that, when the pad is placed on a rail foundation and a rail is placed on the rail-supporting portion (1) of the pad, those means (3) deform under the weight of the rail so as to form a substantially watertight seal around the said peripheral region of the rail-supporting portion (1).
Description
RAIL PADS
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to a pad suitable for spacing the bottom of a railway rail from a rail foundation on which the rail stands.
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to a pad suitable for spacing the bottom of a railway rail from a rail foundation on which the rail stands.
2. Description of the Prior Art It has been found that, owing to the seepage of water, bearing particles of grit, sand, etc., between the pad and the rail foundation (commonly a concrete sleeper), erosion of the rail foundation and/or the pad can occur as the pad moves with respect to the surface of the rail foundation, owing to the passage of railway vehicle~ along the rail above it. Such erosion can be a particular problem where sand is applied to the rail to improve the grip of the wheels of a railway vehicle upon the rail.
BRIEF SUMMARY OF THE lNV~NllON
According to the present invention, there is provided a pad, for providing cushioning between the bottom of a railway rail and a rail foundation on which said rail stands, comprising:
a first portion composed of cushioning material, which is plate-like in shape and which has a first main face for supporting said rail and a second main face opposite said first main face; and resiliently-deformable sealing means, softer than said first main face and located at a peripheral region of said second main face so as to project therefrom, which sealing means are such that, when said pad is placed on said rail foundation and said rail is placed ~_ - 2 - ~ 7 ~
on said first main face, said sealing means contact the rail foundation and deform under the weight of the rail to form a substantially watertight seal, between said rail foundation and said pad, around said the periphery thereof.
In some circumstances it may be preferable that the sealing means, when deformed, do not extend beyond the periphery of the said rail-supporting portion, so that wearing of the sealing means by rail shoulders, rail clips, etc., can be avoided.
The sealing means advantageously comprise a layer of resilient material extending (when not deformed), at least substantially, over the entire lower surface of the said rail-supporting portion and preferably extending right up to (but desirably not beyond, except when deformed) the edges of the pad, but can also comprise a strip of resilient material extending around the peripheral region of the lower surface of the rail-supporting portion. Advantageously, the sealing means may be partially located within a recess provided in the lower surface of the rail-supporting portion.
Preferably, the rail supporting portion is composed of hard polyurethane and the sealing means are composed of soft polyurethane. In a preferred embodiment, the polyurethane of the rail supporting portion has a Shore 'A' hardness value of 90 and that of the sealing means a Shore 'A' hardness value of 60.
In another preferred embodiment the rail-supporting portion is rectangular in shape and has respective .,~"
BRIEF SUMMARY OF THE lNV~NllON
According to the present invention, there is provided a pad, for providing cushioning between the bottom of a railway rail and a rail foundation on which said rail stands, comprising:
a first portion composed of cushioning material, which is plate-like in shape and which has a first main face for supporting said rail and a second main face opposite said first main face; and resiliently-deformable sealing means, softer than said first main face and located at a peripheral region of said second main face so as to project therefrom, which sealing means are such that, when said pad is placed on said rail foundation and said rail is placed ~_ - 2 - ~ 7 ~
on said first main face, said sealing means contact the rail foundation and deform under the weight of the rail to form a substantially watertight seal, between said rail foundation and said pad, around said the periphery thereof.
In some circumstances it may be preferable that the sealing means, when deformed, do not extend beyond the periphery of the said rail-supporting portion, so that wearing of the sealing means by rail shoulders, rail clips, etc., can be avoided.
The sealing means advantageously comprise a layer of resilient material extending (when not deformed), at least substantially, over the entire lower surface of the said rail-supporting portion and preferably extending right up to (but desirably not beyond, except when deformed) the edges of the pad, but can also comprise a strip of resilient material extending around the peripheral region of the lower surface of the rail-supporting portion. Advantageously, the sealing means may be partially located within a recess provided in the lower surface of the rail-supporting portion.
Preferably, the rail supporting portion is composed of hard polyurethane and the sealing means are composed of soft polyurethane. In a preferred embodiment, the polyurethane of the rail supporting portion has a Shore 'A' hardness value of 90 and that of the sealing means a Shore 'A' hardness value of 60.
In another preferred embodiment the rail-supporting portion is rectangular in shape and has respective .,~"
additional ear portions, projecting from a pair of opposite edges thereof near to the corners of said rail-supporting portion, said ear portions each being substantially triangular in shape and having surface regions projecting outwardly from said opposite edges, which regions define respective recesses, along said opposite edges between said ear portions.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows a plan view from above of a pad embodying the present invention, when the pad is not under load;
Figure 2 shows a cross-sectional side view taken along the line II-II in Figure l;
Figure 3 shows a plan view from above of another pad embodying the present invention, when the pad is not under load;
Figure 4 shows a front elevational view looking in the direction of the arrow IV in Figure 3;
Figure 5 shows a side view looking in the direction of the arrow V in Figure 3;
Figure 6 shows a plan view from above of yet another pad embodying the present invention, when the pad is not under load;
Figure 7 shows a cross-sectional side view taken along the line VII-VII in Figure 6; and Figures 8 and 9 show respective cross-sectional side views of two further pads embodying the present invention, when the pads are not under load.
~,~ 4 DETATT.~n DESCRIPTION OF THE PREFERRED RMRODIMENTS
A pad embodying the present invention includes a plate-like rail supporting portion (first portion) 1, which may for example be composed of rubber or, for heavier duty conditions, hard polyurethane. In some circumstances, it may be desirable to provide some form of surface configuration (not shown) on the upper face of the rail-supporting portion 1.
In plan, the rail-supporting portion 1 of the pad of Figures 1 and 6 is in the form of a rectangle having additional ear portions 2 projecting from each corner thereof, so as to provide, on two opposing sides of the pad, respective recesses 2a for locating the pad when it is in use. In the pad of Figure 3, the ear portions 2 taper back from the recesses 2a to reduce the material content. In particular, the pad shown in ~igures 3 to 5, which is suitable for a rail of base width 5.5 inches (14.97 cm), is of width 6.125 inches (15.56 cm) between the recesses 2a, and is 5.75 inches (14.61 cm) in width at the opposing ends of the pad not having the recesses 2a, the pad being of length 7 inches (17.78 cm). That is, the part of the rail-supporting portion 1 where the rail will sit is substantially in the form of a rectangle from which the corners have been cut away. The recesses 2a are of depth 0.625 inches (1.59 cm), so the width of the pad at its widest parts, that is between the most distant extremities of opposing ear portions, is also 7 inches (17.78 cm). The recesses 2a are of length 3.189 ",.
.~ -5-inches (8.1 cm). Please note, however, that the precise shape of the rail-supporting portion 1 is not essential to the present invention, and may take other forms.
A pad embodying the present invention-also includes softer, resiliently-deformable, sealing means which are bonded to the lower surface of the rail-supporting portion 1 at least at a peripheral region thereof. The sealing means are preferably composed of soft polyurethane, but may be made of any other suitable resiliently-deformable material, such as rubber for example.
In the preferred embodiments shown in Figures 1 and 2 and Figures 3 to 5, the sealing means (second portion) comprise a plate-like sealing layer 3, which layer extends over the lower surface of the rail-supporting portion 1. When the pad is in use, between a rail and a rail foundation, the weight of the rail presses down upon the rail-supporting portion 1 of the pad, which in turn brings about deformation of the sealing layer 3, which thereby forms a substantially watertight seal around the peripheral region of the rail-supporting portion 1. The rail-supporting portion may have a thickness of 4mm or above, preferably 5mm, and the sealing layer 3 is desirably, for practical reasons, no less than 1.5mm thick.
In Figures 1 and 2 the sealing layer 3 is of the same shape, in plan, as the rail-supporting portion 1, but is slightly smaller in size such that there is a small gap between the edge of the sealing layer 3 and the periphery of the rail-supporting portion 1. This gap is such that, when the sealing layer 3 is deformed under the weight of a rail, the sealing layer 3 does not extend beyond the periphery of the rail-supporting portion 1, thereby protecting the sealing layer 3, made of soft material, from erosion by external elements bearing upon the pad.
In Figures 3 to 5, however, the sealing layer 3 extends over the entire undersurface of the rail-supporting portion 1, i.e. it terminates in line with the edges of that portion when the pad is not under load. This arrangement has the advantage, over the arrangement of Figures 1 and 2, that it is better at preventing seepage of water between the pad and the rail foundation, and is also easier to manufacture.
Furthermore, the greater the area of the underside of the rail-supporting portion 1 that is covered by the sealing material, the less pressure there will be on that sealing material from the load applied to the pad by the rail clips and rail traffic. Thus, the life of the sealing material is likely to be longer if it extends over the entire under surface of the rail-supporting portion 1, even though, when deformed, the sealing material will extend beyond the periphery of the rail-supporting portion 1.
The pad illustrated in Figures 6 and 7 differs from the pad described with reference to Figures 1 and 2 only . . .
in regard to the sealing means. In the pad of Figures 6 and 7 the sealing means are constituted by a sealing strip 3a, of any suitable resiliently-deformable material which is softer than the material of the rail-supporting portion 1, bonded to the lower surface of the rail-supporting portion 1. The sealing strip 3a extends along the edge of the rail-supporting portion 1, preferably at a short distance therefrom for the same reasons as discussed above with reference to Figures 1 and 2.
Modifications of the pad shown in Figures 6 and 7 are shown in Figures 8 and 9. In Figure 8 the sealing means comprise a sealing strip 3b which is located partially within a recess 4 formed in the lower surface of the rail-supporting portion 1, thus enabling the lower surface of the rail-supporting portion 1 to contact the rail foundation when the pad is in position beneath the rail. Figure 9 illustrates a pad in which the sealing means, comprising a sealing strip 3c partially located in a recess 4, are not spaced from the edge of the rail-supporting portion 1.
It may be desirable, in some circumstances, to seatthe sealing layer 3 of Figures 1 and 2 in a recess formed in the underside of the rail-supporting portion 1.
In each of the pads shown in Figures 8 and 9, the sealing means are bonded to the rail-supporting portion 1.
In each of the pads described with reference to Figures 1 to 9, the sealing means may be bonded to the rail-supporting portion 1 at the time of manufacturing the rail-supporting portion 1 and sealing means, for example by injecting the hard and soft material simultaneously into a single mould, or may alternatively be bonded to the rail-supporting portion 1 at a later stage of manufacture of the pad, for example by means of an adhesive.
As pads embodying the present invention are provided with sealing means which deform, under the weight of a rail placed upon the pad, so as to form a substantially watertight seal around the peripheral region of the rail-supporting portion of the pad, water carrying sand, grit, or other particles, can be prevented from seeping between the base of the pad and the rail foundation, thereby substantially avoiding the problem of erosion of the rail foundation and/or the pad which might otherwise be caused through such water seepage.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows a plan view from above of a pad embodying the present invention, when the pad is not under load;
Figure 2 shows a cross-sectional side view taken along the line II-II in Figure l;
Figure 3 shows a plan view from above of another pad embodying the present invention, when the pad is not under load;
Figure 4 shows a front elevational view looking in the direction of the arrow IV in Figure 3;
Figure 5 shows a side view looking in the direction of the arrow V in Figure 3;
Figure 6 shows a plan view from above of yet another pad embodying the present invention, when the pad is not under load;
Figure 7 shows a cross-sectional side view taken along the line VII-VII in Figure 6; and Figures 8 and 9 show respective cross-sectional side views of two further pads embodying the present invention, when the pads are not under load.
~,~ 4 DETATT.~n DESCRIPTION OF THE PREFERRED RMRODIMENTS
A pad embodying the present invention includes a plate-like rail supporting portion (first portion) 1, which may for example be composed of rubber or, for heavier duty conditions, hard polyurethane. In some circumstances, it may be desirable to provide some form of surface configuration (not shown) on the upper face of the rail-supporting portion 1.
In plan, the rail-supporting portion 1 of the pad of Figures 1 and 6 is in the form of a rectangle having additional ear portions 2 projecting from each corner thereof, so as to provide, on two opposing sides of the pad, respective recesses 2a for locating the pad when it is in use. In the pad of Figure 3, the ear portions 2 taper back from the recesses 2a to reduce the material content. In particular, the pad shown in ~igures 3 to 5, which is suitable for a rail of base width 5.5 inches (14.97 cm), is of width 6.125 inches (15.56 cm) between the recesses 2a, and is 5.75 inches (14.61 cm) in width at the opposing ends of the pad not having the recesses 2a, the pad being of length 7 inches (17.78 cm). That is, the part of the rail-supporting portion 1 where the rail will sit is substantially in the form of a rectangle from which the corners have been cut away. The recesses 2a are of depth 0.625 inches (1.59 cm), so the width of the pad at its widest parts, that is between the most distant extremities of opposing ear portions, is also 7 inches (17.78 cm). The recesses 2a are of length 3.189 ",.
.~ -5-inches (8.1 cm). Please note, however, that the precise shape of the rail-supporting portion 1 is not essential to the present invention, and may take other forms.
A pad embodying the present invention-also includes softer, resiliently-deformable, sealing means which are bonded to the lower surface of the rail-supporting portion 1 at least at a peripheral region thereof. The sealing means are preferably composed of soft polyurethane, but may be made of any other suitable resiliently-deformable material, such as rubber for example.
In the preferred embodiments shown in Figures 1 and 2 and Figures 3 to 5, the sealing means (second portion) comprise a plate-like sealing layer 3, which layer extends over the lower surface of the rail-supporting portion 1. When the pad is in use, between a rail and a rail foundation, the weight of the rail presses down upon the rail-supporting portion 1 of the pad, which in turn brings about deformation of the sealing layer 3, which thereby forms a substantially watertight seal around the peripheral region of the rail-supporting portion 1. The rail-supporting portion may have a thickness of 4mm or above, preferably 5mm, and the sealing layer 3 is desirably, for practical reasons, no less than 1.5mm thick.
In Figures 1 and 2 the sealing layer 3 is of the same shape, in plan, as the rail-supporting portion 1, but is slightly smaller in size such that there is a small gap between the edge of the sealing layer 3 and the periphery of the rail-supporting portion 1. This gap is such that, when the sealing layer 3 is deformed under the weight of a rail, the sealing layer 3 does not extend beyond the periphery of the rail-supporting portion 1, thereby protecting the sealing layer 3, made of soft material, from erosion by external elements bearing upon the pad.
In Figures 3 to 5, however, the sealing layer 3 extends over the entire undersurface of the rail-supporting portion 1, i.e. it terminates in line with the edges of that portion when the pad is not under load. This arrangement has the advantage, over the arrangement of Figures 1 and 2, that it is better at preventing seepage of water between the pad and the rail foundation, and is also easier to manufacture.
Furthermore, the greater the area of the underside of the rail-supporting portion 1 that is covered by the sealing material, the less pressure there will be on that sealing material from the load applied to the pad by the rail clips and rail traffic. Thus, the life of the sealing material is likely to be longer if it extends over the entire under surface of the rail-supporting portion 1, even though, when deformed, the sealing material will extend beyond the periphery of the rail-supporting portion 1.
The pad illustrated in Figures 6 and 7 differs from the pad described with reference to Figures 1 and 2 only . . .
in regard to the sealing means. In the pad of Figures 6 and 7 the sealing means are constituted by a sealing strip 3a, of any suitable resiliently-deformable material which is softer than the material of the rail-supporting portion 1, bonded to the lower surface of the rail-supporting portion 1. The sealing strip 3a extends along the edge of the rail-supporting portion 1, preferably at a short distance therefrom for the same reasons as discussed above with reference to Figures 1 and 2.
Modifications of the pad shown in Figures 6 and 7 are shown in Figures 8 and 9. In Figure 8 the sealing means comprise a sealing strip 3b which is located partially within a recess 4 formed in the lower surface of the rail-supporting portion 1, thus enabling the lower surface of the rail-supporting portion 1 to contact the rail foundation when the pad is in position beneath the rail. Figure 9 illustrates a pad in which the sealing means, comprising a sealing strip 3c partially located in a recess 4, are not spaced from the edge of the rail-supporting portion 1.
It may be desirable, in some circumstances, to seatthe sealing layer 3 of Figures 1 and 2 in a recess formed in the underside of the rail-supporting portion 1.
In each of the pads shown in Figures 8 and 9, the sealing means are bonded to the rail-supporting portion 1.
In each of the pads described with reference to Figures 1 to 9, the sealing means may be bonded to the rail-supporting portion 1 at the time of manufacturing the rail-supporting portion 1 and sealing means, for example by injecting the hard and soft material simultaneously into a single mould, or may alternatively be bonded to the rail-supporting portion 1 at a later stage of manufacture of the pad, for example by means of an adhesive.
As pads embodying the present invention are provided with sealing means which deform, under the weight of a rail placed upon the pad, so as to form a substantially watertight seal around the peripheral region of the rail-supporting portion of the pad, water carrying sand, grit, or other particles, can be prevented from seeping between the base of the pad and the rail foundation, thereby substantially avoiding the problem of erosion of the rail foundation and/or the pad which might otherwise be caused through such water seepage.
Claims (11)
1. A pad, for providing cushioning between the bottom of a railway rail and a rail foundation on which said rail stands, comprising:
a first portion composed of cushioning material, which is plate-like in shape and which has a first main face for supporting said rail and a second main face opposite said first main face; and resiliently-deformable sealing means, softer than said first main face and located at a peripheral region of said second main face so as to project therefrom, which sealing means are such that, when said pad is placed on said rail foundation and said rail is placed on said first main face, said sealing means contact the rail foundation and deform under the weight of the rail to form a substantially watertight seal, between said rail foundation and said pad, around said the periphery thereof.
a first portion composed of cushioning material, which is plate-like in shape and which has a first main face for supporting said rail and a second main face opposite said first main face; and resiliently-deformable sealing means, softer than said first main face and located at a peripheral region of said second main face so as to project therefrom, which sealing means are such that, when said pad is placed on said rail foundation and said rail is placed on said first main face, said sealing means contact the rail foundation and deform under the weight of the rail to form a substantially watertight seal, between said rail foundation and said pad, around said the periphery thereof.
2. A pad as claimed in claim 1, wherein said first portion consists of a first material and said sealing means comprise a layer, consisting of a second material, bonded to said first portion at said second main face thereof and extending over substantially the whole of said second main face.
3. A pad as claimed in claim 2, wherein said first material is a hard polyurethane and said second material is a soft polyurethane.
4. A pad as claimed in claim 3, wherein said first material is of Shore 'A' hardness 90 and said second material is of Shore 'A' hardness 60.
5. A pad as claimed in claim 1, wherein said first portion consists of a first material and said sealing means comprise a strip, consisting of a second material, bonded to said first portion at said peripheral region of said second main face and extending around said peripheral region.
6. A pad as claimed in claim 5, wherein said strip is recessed into said second main face.
7. A pad as claimed in claim 5, wherein said first material is a hard polyurethane and said second material is a soft polyurethane.
8. A pad as claimed in claim 5, wherein said first material is of Shore 'A' hardness 90 and said second material is of Shore 'A' hardness 60.
9. A pad as claimed in claim 1, wherein said sealing means extend to the edges of said second main face and terminate therewith.
10. A pad as claimed in claim 1, wherein said sealing means, when deformed, do not extend beyond the periphery of said first portion.
11. A pad as claimed in claim 1, wherein said first portion is rectangular in shape and has respective additional ear portions, projecting from a pair of opposite edges of said first portion near to the corners of said first portion, said ear portions each being substantially triangular in shape and having surface regions projecting outwardly from said opposite edges, which regions define respective locating recesses, along said opposite edges, between said ear portions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8925238.1 | 1989-11-08 | ||
| GB898925238A GB8925238D0 (en) | 1989-11-08 | 1989-11-08 | Rail pads |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2029276A1 CA2029276A1 (en) | 1991-05-09 |
| CA2029276C true CA2029276C (en) | 1998-12-22 |
Family
ID=10665942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2029276 Expired - Lifetime CA2029276C (en) | 1989-11-08 | 1990-11-05 | Rail pads |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2029276C (en) |
| GB (2) | GB8925238D0 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT404850B (en) * | 1993-02-18 | 1999-03-25 | Porr Allg Bauges | Permanent way with rails and intermediate plates |
| EP0710743A1 (en) * | 1994-11-02 | 1996-05-08 | Illinois Tool Works Inc. | Railroad track, railroad tie and pad for it |
| US5551632A (en) * | 1994-11-02 | 1996-09-03 | Illinois Tool Works Inc. | Elastomeric pad between railroad rail and railroad tie |
| US5551633A (en) * | 1994-11-02 | 1996-09-03 | Illinois Tool Works, Inc. | Elastomeric pad between railroad rail and railroad tie |
| US5549245A (en) * | 1994-11-02 | 1996-08-27 | Illinois Tool Works Inc. | Composite pad useful between railroad rail and railroad tie |
| US6045052A (en) * | 1998-04-02 | 2000-04-04 | Airboss Of America Corp. | Rail tie fastening assembly |
| GB2554648A (en) * | 2016-09-30 | 2018-04-11 | Pandrol Ltd | A pad for a railway rail fastening assembly |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4175700A (en) * | 1976-06-11 | 1979-11-27 | Gehrke Erich F | Support and/or locating means for rails in rail tracks |
| GB2051187B (en) * | 1979-06-13 | 1983-05-18 | Tokai Rubber Ind Ltd | Composite rail pad |
| GB2114635A (en) * | 1982-02-09 | 1983-08-24 | Harefield Rubber Company Limit | Resilient seats for railway rails |
| GB2121461B (en) * | 1982-06-10 | 1985-09-04 | Pandrol Ltd | A pad for positioning under a railway rail and an assembly including the pad |
| DE3720381A1 (en) * | 1987-06-19 | 1989-01-05 | Vossloh Werke Gmbh | DEVICE FOR FASTENING RAILWAY RAILS ON FIXED ROADWAY |
-
1989
- 1989-11-08 GB GB898925238A patent/GB8925238D0/en active Pending
-
1990
- 1990-10-12 GB GB9022220A patent/GB2237833B/en not_active Expired - Fee Related
- 1990-11-05 CA CA 2029276 patent/CA2029276C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB2237833B (en) | 1993-12-01 |
| GB8925238D0 (en) | 1989-12-28 |
| GB9022220D0 (en) | 1990-11-28 |
| GB2237833A (en) | 1991-05-15 |
| CA2029276A1 (en) | 1991-05-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5261599A (en) | Rail pads | |
| CA2029276C (en) | Rail pads | |
| EP0169685B1 (en) | Improvements in or relating to rail pads | |
| KR840007818A (en) | Backing mat and manufacturing method thereof | |
| MX9702267A (en) | Coated abrasive article, method for preparing the same, and method of using. | |
| MY120303A (en) | Negative pressure step pad air bearing design and method for making the same | |
| CA2029568A1 (en) | Polishing-grindstone mount base assembly | |
| GB2077330A (en) | Locating rail pads | |
| US5203502A (en) | Ribbed elastomeric rail pad | |
| CA2463026C (en) | Rail seat assembly | |
| US4915298A (en) | Rail mount for railway-type rails | |
| CN2182192Y (en) | Compound pad on concrete railway sleeper | |
| US4842345A (en) | Track link adhesion pad assembly | |
| CA2017855C (en) | Ribbed elastomeric rail pad | |
| JPH1150401A (en) | Tie pad for track | |
| CN216735449U (en) | Box with anti-skidding structure | |
| CN210862878U (en) | Strain type integrated narrow strip highway weighing sensor | |
| CN218547510U (en) | Smart card for protecting magnetic stripe | |
| JPS6120084Y2 (en) | ||
| JPH0629674Y2 (en) | Sintering machine pallet sealing device | |
| JPS60137711U (en) | Conveyor belt support device | |
| JPS636242Y2 (en) | ||
| JPS6018101U (en) | Rubber mats for slabs or ballast used in track structures | |
| JPS6185734U (en) | ||
| JPH02112619U (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |