Title of Invention	AN IMPROVED FASTENING SYSTEM FOR RAILWAY CROSSINGS.
Abstract	An improved fastening system for holding railway crossings other than Cast Manganese Steel (CMS) crossings on Pre-Stressed Concrete (PSC) sleepers. The assembly comprises a base block (6) and a cap block (7), said base block and cap block being assembled and rested on a PSC sleeper (1) and fastened to an insert (2) with the help of a pin (3); a glass filled nylon insulating liner (5) being rested on said rail foot and an elastic spring clip (8) being held against said glass filled nylon insulting liner with the help of said base block (6) and said cap block assembly (7). The said assembly being completed by inserting a key pin (9) in said cap block (7) with the help of a hammer thus causing the elastic spring clip (8) to deflect and producing required toe load on said rail foot.

Title of Invention

AN IMPROVED FASTENING SYSTEM FOR RAILWAY CROSSINGS.

Abstract

An improved fastening system for holding railway crossings other than Cast Manganese Steel (CMS) crossings on Pre-Stressed Concrete (PSC) sleepers. The assembly comprises a base block (6) and a cap block (7), said base block and cap block being assembled and rested on a PSC sleeper (1) and fastened to an insert (2) with the help of a pin (3); a glass filled nylon insulating liner (5) being rested on said rail foot and an elastic spring clip (8) being held against said glass filled nylon insulting liner with the help of said base block (6) and said cap block assembly (7). The said assembly being completed by inserting a key pin (9) in said cap block (7) with the help of a hammer thus causing the elastic spring clip (8) to deflect and producing required toe load on said rail foot.

Full Text	AN IMPROVED FASTENING SYSTEM FOR RAILWAY CROSSINGS The present invention relates to an improved fastening system to hold railway crossings. The present invention particularly relates to a fastening system to hold railway crossings other than Cast Manganese Steel (CMS) crossings on Pre-Stressed Concrete (PSC) sleepers of Research Development and Standard Organization (RDSO) designed for CMS crossings. The new fastening system produces toe load in the range of 850 to 1100 kg. PRIOR ART Presently, to fasten alternate crossing, MARK III Elastic Rail Clip (ERC) and special liners with the help of insert are used to hold the rail foot on PSC sleepers designed for CMS. The special liners are designed to fill the gap between the insert and the rail foot. This gap between the insert and the rail foot is the result of the design of PSC sleepers for CMS crossing. Due to its basic and inherent configuration, the Mark III ERC is unable to bridge this gap between the rail foot and the insert; thereby requiring the use of a special liner. As the gap between the rail foot and the insert increases, the required toe load of 850 - 1100 kg cannot be expected from a Mark III ERC. In fact, the toe load decreases below the required minimum limit of 850 kg due to transfer of force through the special liner instead of directly to the rail foot. This reduction of toe load below the minimum limit of 850 kg ultimately affects the performance of the alternate crossing used to replace the CMS crossing, resulting in maximum vibration, failure of bolts, and even the failure of the total fastening system. 1 These shortcomings or disadvantages have been felt for a long time. However, in spite of many attempts and research works, the scientists were not successful in making any significant innovation. As a result, the shortcomings of the prior art could not be avoided for a long time or even could not be reduced significantly. INVENTION In the above circumstances, it had been the endeavor of the applicant to design an improved fastening system for holding the railway crossings other than CMS crossings on PSC sleepers designed for CMS crossings and at the same time maintaining the toe load of the fastening system in the desired range of 850 to 1100 kg. Therefore, an object of the present invention is to avoid the drawbacks and / or disadvantages of the conventional fastening systems used in the railway crossings. Another object of the present invention is to provide an improved fastening system for holding railway crossings on PSC sleepers designed for CMS crossings. A further object of the present invention is to design a new fastening system for holding railway crossings having the toe load in the range of 850-1100 kg. A still further object of the present invention is to provide a new fastening system for railway crossings with better performance, resulting in less vibration, no or minimal failure of bolts and washers, and / or the total fastening system. Still another object of this invention is to improve the performance of the railway crossings, other than CMS, and to increase the durability of the whole system. The new fastening system of the present invention essentially comprises an assembly of elastic spring clip, base block, cap block, key pin and pin as described herein below. 2 The new fastening system for holding railway crossings of the present invention will now be explained in further details with reference to the accompanying drawings, wherein - Fig. 1 illustrates the front view of the improved fastening system for railway crossings of the present invention. Fig 1A illustrates the sectional view of the fastening system as shown in Fig. 1 Fig. 2 shows the front view of the elastic spring clip used for obtaining the desired toe load on the rail foot. Fig. 2A shows the top view of the elastic spring clip as shown in Fig.2. Fig. 3 shows the front view of the base block. Fig. 3A shows the top view of the base block as shown in Fig.3. Fig. 4 shows the front view of the cap block to be welded on the top surface of the base block. Fig. 4A shows the top view of the cap block of the Fig.4. Fig. 5 shows the front view of the pin used to hold the base block with the inserts on the PSC sleeper. Fig. 6 shows the front view of the key pin used to deflect the elastic spring clip to produce the desired toe load on the rail foot. Fig .6A shows the top view of the key pin of Fig.6. Fig. 7 shows the front view of the general arrangement of an alternative way of 3 using the elastic spring clip to produce the desired toe load on the rail foot. With reference to the drawings, Figs. 1 and 1A illustrate the front and sectional views of the assembly of the improved fastening system to hold the railway crossings and said assembly comprises a PSC sleeper (1), an insert (2), a pin (3), a groove rubber sole plate (4), glass filled nylon insulated liner (5), a base block(6), a cap block (7), an elastic spring clip (8) and a key pin (9). The drawings illustrates an assembly of base block as shown in fig.3 and a cap block shown in Fig.4 which rests on said PSC sleeper and is fastened to the insert with the help of a pin as shown in Fig. 5. The Glass Filled Nylon (GFN) insulating liner rests on the rail foot. The elastic spring clip as shown in Fig.2 is held against the GFN insulating liner with the help of the base block and the cap bock assembly. The assembly is completed by inserting the key pin as shown in Fig. 6 in the cap block with the help of a hammer. This causes the elastic spring clip to deflect producing the required toe load on rail foot. In an alternate arrangement, the elastic spring clip as shown in Fig. 2 is used in a different manner as shown in Fig. 7 for holding the crossings, other than the CMS crossings on PSC sleepers designed for CMS. The bolt (9) along with a single coil spring washer (8) are used to hold down the elastic rail clip on the holding block (6). The said holding block is fastened to the insert (2) with pin (3). When the bolts are tightened, the elastic spring clip (7) produces the desired toe load on the rail foot. Such a result could not be achieved according to the conventional fastening system in railway crossings. 4 5 The improved fastening systems for railway crossings, as described herein above, and as illustrated in the drawings is only by way of an example. It will be appreciated that any workshop modification and improvement thereof which are within the knowledge of a skilled person are intended to be covered within the scope of the present invention

Full Text

AN IMPROVED FASTENING SYSTEM FOR RAILWAY CROSSINGS
The present invention relates to an improved fastening system to hold railway crossings. The present invention particularly relates to a fastening system to hold railway crossings other than Cast Manganese Steel (CMS) crossings on Pre-Stressed Concrete (PSC) sleepers of Research Development and Standard Organization (RDSO) designed for CMS crossings. The new fastening system produces toe load in the range of 850 to 1100 kg.
PRIOR ART
Presently, to fasten alternate crossing, MARK III Elastic Rail Clip (ERC) and special liners with the help of insert are used to hold the rail foot on PSC sleepers designed for CMS. The special liners are designed to fill the gap between the insert and the rail foot. This gap between the insert and the rail foot is the result of the design of PSC sleepers for CMS crossing. Due to its basic and inherent configuration, the Mark III ERC is unable to bridge this gap between the rail foot and the insert; thereby requiring the use of a special liner. As the gap between the rail foot and the insert increases, the required toe load of 850 - 1100 kg cannot be expected from a Mark III ERC. In fact, the toe load decreases below the required minimum limit of 850 kg due to transfer of force through the special liner instead of directly to the rail foot.
This reduction of toe load below the minimum limit of 850 kg ultimately affects the performance of the alternate crossing used to replace the CMS crossing, resulting in maximum vibration, failure of bolts, and even the failure of the total fastening system.
1

These shortcomings or disadvantages have been felt for a long time. However, in spite of many attempts and research works, the scientists were not successful in making any significant innovation. As a result, the shortcomings of the prior art could not be avoided for a long time or even could not be reduced significantly.
INVENTION
In the above circumstances, it had been the endeavor of the applicant to design an improved fastening system for holding the railway crossings other than CMS crossings on PSC sleepers designed for CMS crossings and at the same time maintaining the toe load of the fastening system in the desired range of 850 to 1100 kg.
Therefore, an object of the present invention is to avoid the drawbacks and / or disadvantages of the conventional fastening systems used in the railway crossings.
Another object of the present invention is to provide an improved fastening system for holding railway crossings on PSC sleepers designed for CMS crossings.
A further object of the present invention is to design a new fastening system for holding railway crossings having the toe load in the range of 850-1100 kg.
A still further object of the present invention is to provide a new fastening system for railway crossings with better performance, resulting in less vibration, no or minimal failure of bolts and washers, and / or the total fastening system.
Still another object of this invention is to improve the performance of the railway crossings, other than CMS, and to increase the durability of the whole system.
The new fastening system of the present invention essentially comprises an assembly of elastic spring clip, base block, cap block, key pin and pin as described herein below.
2

The new fastening system for holding railway crossings of the present invention will now be explained in further details with reference to the accompanying drawings, wherein -
Fig. 1 illustrates the front view of the improved fastening system for railway crossings of the present invention.
Fig 1A illustrates the sectional view of the fastening system as shown in Fig. 1
Fig. 2 shows the front view of the elastic spring clip used for obtaining the desired toe load on the rail foot.
Fig. 2A shows the top view of the elastic spring clip as shown in Fig.2.
Fig. 3 shows the front view of the base block.
Fig. 3A shows the top view of the base block as shown in Fig.3.
Fig. 4 shows the front view of the cap block to be welded on the top surface of the base block.
Fig. 4A shows the top view of the cap block of the Fig.4.
Fig. 5 shows the front view of the pin used to hold the base block with the inserts on the PSC sleeper.
Fig. 6 shows the front view of the key pin used to deflect the elastic spring clip to produce the desired toe load on the rail foot.
Fig .6A shows the top view of the key pin of Fig.6.
Fig. 7 shows the front view of the general arrangement of an alternative way of
3

using the elastic spring clip to produce the desired toe load on the rail foot.
With reference to the drawings, Figs. 1 and 1A illustrate the front and sectional views of the assembly of the improved fastening system to hold the railway crossings and said assembly comprises a PSC sleeper (1), an insert (2), a pin (3), a groove rubber sole plate (4), glass filled nylon insulated liner (5), a base block(6), a cap block (7), an elastic spring clip (8) and a key pin (9).
The drawings illustrates an assembly of base block as shown in fig.3 and a cap block shown in Fig.4 which rests on said PSC sleeper and is fastened to the insert with the help of a pin as shown in Fig. 5. The Glass Filled Nylon (GFN) insulating liner rests on the rail foot. The elastic spring clip as shown in Fig.2 is held against the GFN insulating liner with the help of the base block and the cap bock assembly.
The assembly is completed by inserting the key pin as shown in Fig. 6 in the cap block with the help of a hammer. This causes the elastic spring clip to deflect producing the required toe load on rail foot.
In an alternate arrangement, the elastic spring clip as shown in Fig. 2 is used in a different manner as shown in Fig. 7 for holding the crossings, other than the CMS crossings on PSC sleepers designed for CMS. The bolt (9) along with a single coil spring washer (8) are used to hold down the elastic rail clip on the holding block (6). The said holding block is fastened to the insert (2) with pin (3). When the bolts are tightened, the elastic spring clip (7) produces the desired toe load on the rail foot. Such a result could not be achieved according to the conventional fastening system in railway crossings.
4

5
The improved fastening systems for railway crossings, as described herein above, and as illustrated in the drawings is only by way of an example. It will be appreciated that any workshop modification and improvement thereof which are within the knowledge of a skilled person are intended to be covered within the scope of the present invention

Documents:

0110-kol-2007 correspondence others.pdf

0110-kol-2007 description(provitional).pdf

0110-kol-2007 drawings.pdf

0110-kol-2007 form-1.pdf

0110-kol-2007 form-2.pdf

0110-kol-2007 form-26.pdf

110-KOL-2007-(26-02-2014)-ABSTRACT.pdf

110-KOL-2007-(26-02-2014)-CLAIMS.pdf

110-KOL-2007-(26-02-2014)-CORRESPONDENCE.pdf

110-KOL-2007-(26-02-2014)-DESCRIPTION (COMPLETE).pdf

110-KOL-2007-(26-02-2014)-DRAWINGS.pdf

110-KOL-2007-(26-02-2014)-FORM-1.pdf

110-KOL-2007-(26-02-2014)-FORM-2.pdf

110-KOL-2007-ABSTRACT.pdf

110-KOL-2007-CLAIMS.pdf

110-KOL-2007-CORRESPONDENCE OTHERS 1.1.pdf

110-KOL-2007-CORRESPONDENCE.pdf

110-KOL-2007-DESCRIPTION COMPLETE.pdf

110-KOL-2007-DRAWINGS 1.1.pdf

110-kol-2007-form 18.pdf

110-KOL-2007-FORM 2-1.1.pdf

110-KOL-2007-FORM 5.pdf

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Patent Number

265311

Indian Patent Application Number

110/KOL/2007

PG Journal Number

08/2015

Publication Date

20-Feb-2015

Grant Date

18-Feb-2015

Date of Filing

29-Jan-2007

Name of Patentee

GOENKA RAJESH

Applicant Address

P-30 KAKURGACHI MAIN ROAD, KOLKATA-700054

Inventors:

#	Inventor's Name	Inventor's Address
1	GOENKA RAJESH	P-30 KAKURGACHI MAIN ROAD, KOLKATA-700054

PCT International Classification Number

E01C 9/04

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA