Abstract: RAIL SLEEPER ASSEMBLY WITH EXTRA-WIDE RAIL SEATS A rail sleeper assembly (1000) is provided including a central member (1400) having a first end (1401) and a second end (1402) opposite to the first end (1401). A pair of bridging members (1300) are formed next to the first end (1401) and the second end (1402) of central member (1400), wherein each of the pair of bridging members (1300) includes a taper profile that extends outwardly from the first end (1401) and the second end (1402). A pair of rail seat members (1200) are formed, which next to the bridging members (1300), and are adapted to receive rails. A pair of outer members (1100) are formed next to the rail seat members (1200) and have an outer member width. The pair of outer members (1100) is adapted to provide extended support to the rails, and the outer member width is lesser than the rail seat width. <>
DESC:FIELD OF THE INVENTION
The present innovation relates to the field of railway tracks, and more particularly relates to rail sleeper assemblies with extra-wide rail seats, operation of the rail seat assemblies, and method for manufacturing them.
BACKGROUND
Rail sleeper is a railway component employed to install a pair of rails to form the railway track. In addition, the rail sleeper installs the pair of rails to maintain a correct gauge of the rail track. In the field of railroad construction, current rail sleepers are made of various material, such as wood, concrete, steel and composite materials with almost uniform bottom widths are common. The ends of the rail sleeper assemblies provide majority of track lateral resistance.
Rail sleepers normally comprise, on either end, rail contact / rail seat areas where the rails are fixed on their rail feet with the aid of rail fastenings or hold-down fixtures. To allow for an increased amount of lateral forces to be taken up in the lateral direction (i.e. transversely to the running direction of the rails), it is known to broaden the width of the sleeper end sections. The functions rail sleeper assemblies include but are not limited to:
• Providing a firm and even support to rails.
• Holding rails to correct gauge and alignment.
• Transferring the load from the rails to the wider area of the ballast.
• Acting as an elastic member between the rails and the ballast to absorb the vibrations.
• Providing longitudinal and lateral stability to track.
• Providing means to rectify the track geometry during its service life – machine or manual.
With increased loads and speeds of railway systems, sleeper designs and spacing have undergone changes but still rail corrugations, ballast crushing, rapid deterioration of track geometry, sleeper cracks due to center binding and end binding and few cases of track buckling are common. The conventional rail sleeper assemblies are also known to deteriorate and have a short life-span due to enormous bending moments due to loads both at rail seat members (sagging moment) and at central members (hogging moment).
SUMMARY
This summary is provided to introduce a selection of concepts, in a simplified format, that are further described in the detailed description of the invention. This summary is neither intended to identify key or essential inventive concepts of the invention and nor is it intended for determining the scope of the invention.
The present subject matter relates to an extra-wide rail sleeper assembly, used in the laying of rails and tracks for better dispersion of lateral forces.
In an embodiment, a rail sleeper assembly is provided, for laying of rails and tracks. The rail sleeper assembly includes a longitudinal axis and a central member having a first end and a second end opposite to the first end, such that the longitudinal axis passes through the first end and the second end of the central member. The rail sleeper assembly includes a pair of bridging members attached to the first end and the second end along the longitudinal axis. Further, each of the pair of bridging members includes a taper profile that extends outwardly from the first end and the second end. The rail sleeper assembly further includes a pair of rail seat members that are attached to a bridging member along the longitudinal axis. Further, each rail seat member has a rail seat adapted to receive a rail thereon.
In an embodiment, the rail sleeper assembly includes a pair of outer members that have an outer member width, and each outer members of the pair is located at one end of the rail seat member. Further, the pair of outer members is adapted to provide extended support to the rails, and the outer member width is lesser than the rail seat width.
The rail sleeper assembly has a varying trapezoidal cross section along the longitudinal axis, wherein the trapezoidal cross section at the rail seat member is greater than the trapezoidal cross section at the outer member. The trapezoidal cross section at the rail seat member is greater than the trapezoidal cross section at the bridging member. The trapezoidal cross section at the bridging member is greater than the trapezoidal cross section at the central member.
The rail sleeper assembly helps in decreasing in effective rail span considerably and thus reduction in rail bending stresses. The rail assembly further enables significant reduction of rail wheel load pressure on the ballast and the track substructure. Moreover, it increases lateral resistance of the track and also lowers bending moments due to enormous loads.
To further clarify advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:
Figure 1 represents perspective view of multiple rail sleeper assemblies with crib ballast therebetween, according to an embodiment of the present disclosure;
Figure 2 represents top view of a railway track including multiple rail sleeper assemblies with crib ballast therebetween, according to an embodiment of the present disclosure;
Figure 3 represents a perspective view of a rail sleeper assembly, according to an embodiment of the present disclosure;
Figure 4 represents a side view of the rail sleeper assembly, according to an embodiment of the present disclosure;
Figure 5 represents a top view of the rail sleeper assembly, according to an embodiment of the present disclosure; and
Figure 6 represents a rail seat member present in the rail sleeper assembly, according to an embodiment of the present disclosure.
Figure 7 represents the rail sleeper assembly with thread rail fastening mechanism, according to an embodiment of the present disclosure.
Figure 8 represents the rail sleeper assembly with sleeper pad, according to an embodiment of the present disclosure.
Figure 9 illustrates first type of cross-sections at different parts of the rail sleeper assembly, according to an embodiment of the present disclosure.
Figure 10 illustrates second type of cross-sections at different parts of the rail sleeper assembly, according to an embodiment of the present disclosure.
Figure 11 illustrates regions for lateral resistance provided by extra-wide area of the rail sleeper assembly, according to an embodiment of the present disclosure.
Figures 12 illustrates a construction of the rail sleeper assembly showing the placement of reinforcements in a pre-defined configured within the rail sleeper assembly, according to an embodiment of the present disclosure; and
Figure 13 illustrates another construction of the rail sleeper assembly showing the placement of reinforcements in another pre-defined configured within the rail sleeper assembly.
Further, skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and may not have necessarily been drawn to scale. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the drawings by conventional symbols, and the drawings may show only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.
DETAILED DESCRIPTION OF FIGURES
For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated system, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skilled in the art to which this invention belongs. The system, methods, and examples provided herein are illustrative only and not intended to be limiting.
For example, the term “some” as used herein may be understood as “none” or “one” or “more than one” or “all.” Therefore, the terms “none,” “one,” “more than one,” “more than one, but not all” or “all” would fall under the definition of “some.” It should be appreciated by a person skilled in the art that the terminology and structure employed herein is for describing, teaching, and illuminating some embodiments and their specific features and elements and therefore, should not be construed to limit, restrict or reduce the spirit and scope of the present disclosure in any way.
For example, any terms used herein such as, “includes,” “comprises,” “has,” “consists,” and similar grammatical variants do not specify an exact limitation or restriction, and certainly do not exclude the possible addition of one or more features or elements, unless otherwise stated. Further, such terms must not be taken to exclude the possible removal of one or more of the listed features and elements, unless otherwise stated, for example, by using the limiting language including, but not limited to, “must comprise” or “needs to include.”
Whether or not a certain feature or element was limited to being used only once, it may still be referred to as “one or more features” or “one or more elements” or “at least one feature” or “at least one element.” Furthermore, the use of the terms “one or more” or “at least one” feature or element do not preclude there being none of that feature or element, unless otherwise specified by limiting language including, but not limited to, “there needs to be one or more...” or “one or more elements is required.”
Unless otherwise defined, all terms and especially any technical and/or scientific terms, used herein may be taken to have the same meaning as commonly understood by a person ordinarily skilled in the art.
Reference is made herein to some “embodiments.” It should be understood that an embodiment is an example of a possible implementation of any features and/or elements of the present disclosure. Some embodiments have been described for the purpose of explaining one or more of the potential ways in which the specific features and/or elements of the proposed disclosure fulfil the requirements of uniqueness, utility, and non-obviousness.
Use of the phrases and/or terms including, but not limited to, “a first embodiment,” “a further embodiment,” “an alternate embodiment,” “one embodiment,” “an embodiment,” “multiple embodiments,” “some embodiments,” “other embodiments,” “further embodiment”, “furthermore embodiment”, “additional embodiment” or other variants thereof do not necessarily refer to the same embodiments. Unless otherwise specified, one or more particular features and/or elements described in connection with one or more embodiments may be found in one embodiment, or may be found in more than one embodiment, or may be found in all embodiments, or may be found in no embodiments. Although one or more features and/or elements may be described herein in the context of only a single embodiment, or in the context of more than one embodiment, or in the context of all embodiments, the features and/or elements may instead be provided separately or in any appropriate combination or not at all. Conversely, any features and/or elements described in the context of separate embodiments may alternatively be realized as existing together in the context of a single embodiment.
Any particular and all details set forth herein are used in the context of some embodiments and therefore should not necessarily be taken as limiting factors to the proposed disclosure.
Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
For the sake of clarity, the first digit of a reference numeral of each component of the present disclosure is indicative of the Figure number, in which the corresponding component is shown. For example, reference numerals starting with digit “1” are shown at least in Figure 1. Similarly, reference numerals starting with digit “2” are shown at least in Figure 2.
The present disclosure relates to a rail sleeper assembly, used in the laying of rails and rail tracks. The rail sleeper assemblies are known for receiving rails therein, so as to complete a rail tack. These assemblies include rail seat members, for receiving the rails.
As depicted in Figures 1 and 2, an assembly 2000 that includes a plurality of rail sleeper assembly 1000 to form a railway track (not shown) according to an embodiment of the present disclosure. Figure 1 represents perspective view of multiple rail sleeper assemblies with crib ballast therebetween, while Figure 2 represents top view thereof. The rail sleeper assemblies 1000 may be installed on a platform 1500. In addition, the rail sleeper assemblies 1000 may be surrounded by vibration absorbing matter known as ballast 1505. The ballast 1505, in one example, can be stone, sand, among other examples.
The rail sleeper assemblies 1000 may be employed to mount the pair of rails thereon. Each rail sleeper assembly 1000 is configured to perform two tasks. First, the rail sleeper assembly 1000 ties the rail thereto to maintain the gauge of the railway track and second, the rail sleeper assembly 1000 dissipates the load from the rails to the platform 1500. In one example, each rail sleeper assembly 1000 may dissipate the load and vibrations caused by the load to the ballasts 1505 around the rail sleeper assembly 1000. In one example, the rail sleeper assembly 1000 may dissipate the load in a direction along a longitudinal axis A1 of the rail sleeper assembly 1000. In addition, the rail sleeper assembly 1000 may dissipate the load in a direction lateral to the longitudinal axis A1. For instance, the rail sleeper assembly 1000 may dissipate the load and vibration to a crib ballast 1505. The crib ballast 1505 is a portion of ballast formed between two consecutive rail sleeper assembly 1000. The ability of the rail sleeper assembly 1000 to dissipate large amount of load and vibration evenly to the ballast results in additional lateral resistance compared to conventional rail sleeper assemblies.
The rail sleeper assembly 1000 is able to dissipate the load and vibrations owing to wider rail seats. Structure details of the rail sleeper assembly 1000 is explained in subsequent paragraphs.
Figures 3 to 8 depict the structural aspects of a rail sleeper assembly 1000 disclosed by the present disclosure. Specifically, Figure 3 represents a perspective view of a rail sleeper assembly 1000, depicting different sections of the rail sleeper assembly 1000, i.e., a central member 1400, a pair of bridging members 1300, a pair of rail seat members 1200 and a pair of outer members 1100. Figure 4 represents a side view of the rail sleeper assembly 1000, while Figure 5 represents a top view of the rail sleeper assembly 1000. Figure 6 represents an enhanced view of the rail seat member 1200 present in the rail sleeper assembly 1000, depicting the area in which the rails are placed, and the mechanism used therefor. Figure 7 represents thread rail fastening mechanism for fastening the rails to the rail seat members 1200, and Figure 8 represents the rail sleeper assembly 1000 a sleeper pad 8700.
The rail sleeper assembly 1000 as depicted by Figure5 may have a longitudinal axis A1. The rail sleeper assembly 1000 may include the central member 1400 at the center of the rail sleeper assembly 1000. The central member has a first end 1401 and a second end 1402 opposite to the first end 1401, such that the longitudinal axis A1 passes through both the first end 1401 and the second end 1402. The rail sleeper assembly 1000 may also include the pair of bridging members 1300 formed at each of the first end 1401 and second end 1402 of the central member 1400 along the longitudinal axis A1. Further, each of the bridging members 1300 may have a taper profile extending outwardly from the first and the second end 1402 of the central member 1400.
In one example, the rail sleeper assembly 1000 may include a pair of rail seat members 1200 formed adjacent to each bridging member 1300 along the longitudinal axis A1. The rail seat members 1200 are configured to place the rails 1200 thereon. The rail seat members 1200 are extends from the wider end of each of the bridging members 1300, and the central member 1400 is coupled to the narrow end of the bridging member 1300, as depicted in Figure 3. Rails are supported on the pair of rail seat members 1200 by the shoulders 1201, 1203 provided on sides of each of the rail seat members 1200. The rail sleeper assembly 1000 may include a pair of outer members 1100 are formed adjacent to each of the rail seat members 1200, at both the ends of the rail sleeper assembly 1000, and next to the rail seat members 1200. The outer members 1100 are configured to provide extended support to the rails.
In one example, the rail seat members 1200 enables uniform dissipation of loads acting thereupon, and thereby providing an increased lateral resistance as well as resistance to bending moment. In order to achieve the aforementioned task, the rail seat members 1200 have the maximum width when compared to the central member 1400, and the outer members 1100. Referring now to Figure 5, the rail seat member 1200 has a length L and a width W. In one example, ratio of width Wc of the central member 1400 to the width W of rail seat member 1200 is in range of 1.25 to 1.60. In another example, width W of each rail seat member 1200 across the longitudinal axis A1 is substantially/1.5 times greater than a length L of each rail seat member 1200 along the longitudinal axis A1. Larger value of length L enables the rail seat member 1200 to receive load over a large area that enables better dissipation of load.
Referring now to Figure 6 that shows an enhanced view rail seat member 1200, whereon a rail may be placed. In one example, the rail may be fastened to the rail seat member 1200 by putting a fastener into the provisions 1202 provided in the rail seat member. In another example, the rail may be fastened to the rail seat member 1200 either by a threaded fastening mechanism (generally with W-clip), or a threadless fastening mechanism (generally with e-clip or Elastic rail Clip), and accordingly minor modification in the rail seat member 1200 may be made. In yet another example, the rail may be fastened to the rail seat member 1200 by any fastening mechanism that may be able to provide efficient gripping to the rail.
In an embodiment, the rail seat member 1200 may include shoulders 1201, 1203 on the either ends of the rail seat member 1200 for providing grip to the rail from sides by making a U-shaped groove in the rail seat member so that the rail can be fixed into this U-shaped groove. In another embodiment, shoulders 1201, 1203 may be absent, and instead, inserts 7201, as shown in Figures 7 and 8, are provided to grip and support the rail from sides. In yet another embodiment, any type of grippers may be provided on or in proximity of the rail seat members 1200, to grip and support the rails from side.
In one example, the installation of the rail sleeper assembly 1000 is needed in such a way that the rail sleeper assembly 1000 may dissipate the load efficiently. Such installation may need the implements that ensure secure mounting of the rail sleeper assembly 1000. In one example, the sleeper pad 8700 may be provided under the rail sleeper assembly 1000 for fixation of the rail sleeper assembly 1000 on the rail track together with regular rail fastenings or hold-down fixture able to grip rail foot, as depicted in Figure 8. The sleeper pad 8700 ensures that the vibration of the rail sleeper assemblies 1000 are not transmitted to the ballast 1505 right underneath the rail sleeper assembly 1000 and prevent unwanted movement of the rail sleeper assembly 1000. The sleeper pad 8700 may be made up of resilient rubber material, injected plastic granules, elastomers among other materials that may be used, and may be glued to the rail sleeper assembly 1000 for fixing it to the rail track and for better damping of rail vibrations. In another example, the rail sleeper assembly 1000 may be provided with any such suitable means for fixing it to the rail track, and for better damping of the vibrations.
The rail sleeper assembly 1000 when combined with matching longer rail sleeper pad 8700 or the like, makes it best suited for heavy haul and higher speed tracks. Providing a sleeper pad 8700 under the rail sleeper assembly 1000 also improves the interface performance between bottom of the rail sleeper assembly 1000 and the ballast 1505 (as shown in Figure 2). In one example, each of the central member 1400, the pair of bridging members 1300, and the pair of rail seat members 1200 forms a bottom surface profiled to reduce bending moments due to loads on at least one of the pair of rail seat members 1200 and the central member 1400.
As mentioned before, the rail sleeper assembly 1000 as disclosed herein provides better lift resistance than the conventional sleeper assemblies. This is done by providing varied trapezoidal cross sections at different locations of rail sleeper assembly 1000 with the lower width of the rail seat member 1200 being more than its upper width. This establishes a large supporting surface of the rail seat member 1200 with the ballast, thereby improving lift resistance with relatively small weight.
Referring now to Figure 9 that depicts cross-sections of various sections of the rail sleeper assembly 1000 wherein the rail seat cross-section 1601, central member cross-section 1602 and outer member cross-sections 1603 are in the form of trapezoids, wherein top of the rail seat member 1200 is wider than that of its bottom. This provides resistance for rail lift forces. Also, for this kind of rail sleeper assembly 1000, a single mould is enough for manufacturing, which can easily be removed from the top thereafter.
In another example, the bottom of the rail seat member 1200 may be wider than that of its top (see cross-section 1604), as depicted in Figure 10, the central member 1400 cross-section 1602 and outer member cross-section 1603 having a trapezoidal section wherein their top is wider than their bottom. This cross-section configuration helps providing bottom pressure on ballast 1505, thereby providing resistance for rail lift forces. For this kind of rail sleeper assembly 1000, more than one moulds may be required for manufacturing. The mould for rail seat member 1200 can be removed from bottom and the moulds for the central member 1400 and outer member 1100 can be removed from top.
Operational aspects of the rail sleeper assembly 1000 are disclosed. The space between two consecutive rail sleeper assemblies 1000 space is filled with ballast 1505, which together with the extra width of the rail seat members 1200 results in an increased lateral resistance. The rail seat members 1200 are wider than rest of the sections, that is, the central member 1400 and the outer member 1100. Due to this extra width, more area of the rail seat members 1200 of the consecutive rail sleeper assemblies 1000 protrudes into the crib ballast 1505 to provide increased restrain force acting thereon into various directions from the rails to the crib ballast 1505.
Referring now to Figure 3, that also depicts the direction of application of force and its direction of dissipation. For instance, when load is applied on the rails, the rails in turn apply a downward force ‘Fd’ on the rail seat members 1200, which acts in the direction towards the ground. The downward force ‘Fd’ is dissipated in various directions, i.e., a lateral force ‘Fl’, that acts in a direction along the length of the rail sleeper assembly 1000 and a longitudinal force ‘Fln’, that acts in the direction along the rail track. Since, the width of the rail seat members 1200 is more than that of the outer members 1100 and the central member 1400, therefore, an extra area of the rail seat members 1200 protrudes into the crib ballast 1505, than that of the areas of the central member 1400 and the outer members 1100. Therefore, the end action due to this extended width of the rail seat members 1200 results in an increased dispersion of force into the ballast 1505 than the conventional rail sleeper assemblies, specially at the rail seat members 1200, and thereby increase in restraint of ballast 1505 at the rail seat members 1200, as compared to the central member 1400 and the outer members 1100. The consecutive rail sleeper assemblies 1000 with extra wide rail seat members 1200 thereby increase the overall lateral resistance of the rail track.
Referring now to Figure 11 that depicts regions with increased lateral resistance provided by virtue of extra-width of the rail sleeper assembly 1000 and the efficient force dissipation as explained above. The rail sleeper assembly 1000 where extreme ends of sleeper 2501 and transition 2502 between rail seat members 1200 and central member 1400 as well as transition 2503 between rail seat members 1200 and the outer member 1100 are high restrain regions. The central member 1400 provides low restrain due to curved area 2504.
Manufacturing aspects of the rail sleeper assembly 1000 are explained with reference to Figures 12 and 13. Specifically, Figure 12 illustrates a construction of the rail sleeper assembly 1000 showing the placement of reinforcements 3300 in a pre-defined configured within the rail sleeper assembly 1000. Figure 13 illustrates another construction of the rail sleeper assembly 1000 showing the placement of reinforcements 3100 in another pre-defined configured within the rail sleeper assembly 1000, disclosed herein. The rail sleeper assembly 1000 may be formed using prestressed concrete structures (PSC). Prestressed concrete structures are prepared by employing concrete and introducing internal stresses of a suitable magnitude and distribution, such that the stresses resulting from the external loads are counteracted to a desired degree. Further, the PSC of the rail sleeper assembly 1000 may be formed using, reinforcement 3100 at the rail seat members may be in the form of steel rod and steel ties, Further, as shown in Figure 12, the PSC may include a rectangular shaped reinforcement 3300 at the rail seat member 1200. Alternatively, the PSC may include steel rods half-trapezoidal shape 3200 at the rail seat member 1200. In another example, the PSC strands and reinforcement 3100 structures at the rail seat members 1200 may be in any form as per requirement. The PSC strands and reinforcement 3100 structures may be bended and extended to achieve the desired widths and shapes of the central member 1400, bridging member 1300, and outer member 1100, as depicted in figures 12 and 13.
The rail sleeper assembly 1000 disclosed herein provides extra-wide area at the rail seat members 1200, thereby providing enlarged support for rail without interfering with track machines tamping or machine cleaning of ballast. Further, the rail sleeper assembly 1000 is suitable for different gauges, axle loads type of traffic and speeds. Furthermore, rail sleeper assembly 1000 on one side decreases in effective rail span considerably and thus promotes reduction in rail bending stresses and on the other side it enables significant reduction of rail wheel load pressure on the ballast 1505 and the track substructure. Also, the rail sleeper assembly 1000 increases lateral resistance of track, lowers bending moments in itself, thus making it cost-effective.
The extra width of the rail seat member 1200 formed in the rail sleeper assembly 1000 as disclosed herein, additionally results in low vibration values, stretches maintenance cycle intervals, and prolongs the track life cycle. It further enhances riding comfort, environmental compatibility, and the cost effectiveness of railway operations. The rail sleeper assembly 1000 of the present disclosure, when combined with matching longer elastomer pad 8700 makes it best suited for heavy haul and higher speed tracks.
While specific language has been used to describe the present disclosure, any limitations arising on account thereto, are not intended. As would be apparent to a person in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein. The drawings and the foregoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. ,CLAIMS:
1. A rail sleeper assembly (1000) having a longitudinal axis (A1), the rail sleeper assembly (1000) comprising:
a central member (1400) having a first end (1401) and a second end (1402) opposite to the first end (1401), and a longitudinal axis (A1) passing through the first end (1401) and the second end (1402);
a pair of bridging members (1300) attached to the first end (1401) and the second end (1402) along the longitudinal axis (A1), wherein each of the pair of bridging members (1300) includes a taper profile that extends outwardly from the first end (1401) and the second end (1402); and
a pair of rail seat members (1200), each attached to the pair of bridging members (1300) along the longitudinal axis (A1) and has a rail seat adapted to receive a rail thereon.
2. The rail sleeper assembly (1000) as claimed in claim 1, wherein ratio of width (Wc) of the central member (1400) to width (W) of the rail seat member (1200) is in range of 1.25 to 1.60.
3. The rail sleeper assembly (1000) as claimed in claim 1, wherein the width (W) of each rail seat member (1200) across the longitudinal axis (A1) is (substantially/1.5 times) greater than a length (L) of each rail seat member (1200) along the longitudinal axis (A1).
4. The rail sleeper assembly (1000) as claimed in claim 1, wherein each of the central member (1400), the pair of bridging members (1300), and the pair of rail seat members (1200) forms a bottom surface profiled to reduce bending moments due to loads on at least one of the pair of rail seat members (1200) and the central member (1400).
5. The rail sleeper assembly (1000) as claimed in claim 1, wherein the pair of rail seat members (1200) is adapted to fix the rail therein by gripping a rail foot (1601) through one of a long/wide rail pad, a regular rail fastening, and a hold-down fixture.
6. The rail sleeper assembly (1000) as claimed in claim 1, comprising a pair of outer members (1100) having an outer member width, and each of the pair of outer members (1100) located at each end of the rail seat member (1200), wherein the pair of outer members (1100) is adapted to provide extended support to the rails, and the outer member width is lesser than the rail seat width (W).
7. The rail sleeper assembly (1000) as claimed in claim 1, comprising one of a threadless fastening mechanism and a threaded fastening mechanism adapted to mount the rail on the pair of rail seat members (1200).
8. The rail sleeper assembly (1000) as claimed in claim 1, comprising a sleeper pad (8700) or injected plastic granules disposed below each of the pair of rail seat members (1200), the pair of bridging members (1300), and the pair of outer members (1100) to dampen vibrations.
9. The rail sleeper assembly (1000) as claimed in claim 1 has a varying trapezoidal cross section along the longitudinal axis (A1), wherein
the trapezoidal cross section (1601) at the rail seat member (1200) is greater than the trapezoidal cross section (1603) at the outer member (1100),
the trapezoidal cross section (1601) at the rail seat member (1200) is greater than the trapezoidal cross section at the bridging member (1300), and
the trapezoidal cross section at the bridging member (1300) is greater than the trapezoidal cross section (1602) at the central member (1400).
10. A railway track comprising a plurality of rail sleeper assemblies (1000) as claimed in claim 1 and a crib ballast (1505) surrounding the plurality of rail sleeper assemblies (1000).
11. The railway track as claimed in claim 10, wherein consecutive rail sleeper assemblies (1000) forms the crib ballast (1505) there between and the rail seat member (1200) of each of the consecutive rail seat assemblies (1000) protrudes in the crib ballast (1505) to restrain force along the longitudinal axis (A1) acting thereon from the rails to the crib ballast (1505).
| # | Name | Date |
|---|---|---|
| 1 | 202141029130-STATEMENT OF UNDERTAKING (FORM 3) [29-06-2021(online)].pdf | 2021-06-29 |
| 2 | 202141029130-PROVISIONAL SPECIFICATION [29-06-2021(online)].pdf | 2021-06-29 |
| 3 | 202141029130-POWER OF AUTHORITY [29-06-2021(online)].pdf | 2021-06-29 |
| 4 | 202141029130-FORM FOR STARTUP [29-06-2021(online)].pdf | 2021-06-29 |
| 5 | 202141029130-FORM FOR SMALL ENTITY(FORM-28) [29-06-2021(online)].pdf | 2021-06-29 |
| 6 | 202141029130-FORM 1 [29-06-2021(online)].pdf | 2021-06-29 |
| 7 | 202141029130-EVIDENCE FOR REGISTRATION UNDER SSI(FORM-28) [29-06-2021(online)].pdf | 2021-06-29 |
| 8 | 202141029130-EVIDENCE FOR REGISTRATION UNDER SSI [29-06-2021(online)].pdf | 2021-06-29 |
| 9 | 202141029130-DRAWINGS [29-06-2021(online)].pdf | 2021-06-29 |
| 10 | 202141029130-DECLARATION OF INVENTORSHIP (FORM 5) [29-06-2021(online)].pdf | 2021-06-29 |
| 11 | 202141029130-Proof of Right [10-08-2021(online)].pdf | 2021-08-10 |
| 12 | 202141029130-ENDORSEMENT BY INVENTORS [08-10-2021(online)].pdf | 2021-10-08 |
| 13 | 202141029130-DRAWING [08-10-2021(online)].pdf | 2021-10-08 |
| 14 | 202141029130-CORRESPONDENCE-OTHERS [08-10-2021(online)].pdf | 2021-10-08 |
| 15 | 202141029130-COMPLETE SPECIFICATION [08-10-2021(online)].pdf | 2021-10-08 |
| 16 | 202141029130-STARTUP [26-06-2025(online)].pdf | 2025-06-26 |
| 17 | 202141029130-FORM28 [26-06-2025(online)].pdf | 2025-06-26 |
| 18 | 202141029130-FORM 18A [26-06-2025(online)].pdf | 2025-06-26 |