US3576293A - Direct fixation rail fastener apparatus - Google Patents
Direct fixation rail fastener apparatus Download PDFInfo
- Publication number
- US3576293A US3576293A US802480A US3576293DA US3576293A US 3576293 A US3576293 A US 3576293A US 802480 A US802480 A US 802480A US 3576293D A US3576293D A US 3576293DA US 3576293 A US3576293 A US 3576293A
- Authority
- US
- United States
- Prior art keywords
- rail
- plate means
- elastomeric material
- plate
- recited
- 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
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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
- E01B9/38—Indirect fastening of rails by using tie-plates or chairs; Fastening of rails on the tie-plates or in the chairs
- E01B9/40—Tie-plates for flat-bottom rails
-
- 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
- E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
- E01B9/04—Fastening on wooden or concrete sleepers or on masonry without clamp members
-
- 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
- E01B9/38—Indirect fastening of rails by using tie-plates or chairs; Fastening of rails on the tie-plates or in the chairs
- E01B9/44—Fastening the rail on the tie-plate
- E01B9/46—Fastening the rail on the tie-plate by clamps
-
- 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
- E01B9/62—Rail fastenings incorporating resilient supports
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
Definitions
- Lowhurst ABSTRACT A rail fastener device for directly affixing rapid [s4] EB Q g FASTENER APPARATUS transit system rail apparatus to a rigid support structure.
- the a device includes a rail plate and a baseplate which are [52] U.S. Cl 238/287, separated by a layer of elastomeric material which is bonded 238/264, 238/293, 238/310 to the adjacent sides of each plate.
- Means are provided for [51] Int. Cl EOlb 9/02, fastening the rail directly to the rail plate, and means are pro- EOlb 9/62 vided for fastening the baseplate directly to the support struc- Field of Search 238/281, ture.
- the rail plate is free to float on the elastomeric 282, 283, 291, 346, 304, 297, 298, 288, 341, 342, material with respect to said baseplate so as to provide vibrational damping as well as electrical isolation therebetween.
- the present invention is related generally to rail fastening devices and, more particularly, to a novel rail fastener for directly affixing rapid transit rail apparatus to a rigid support structure.
- the tie on ballast arrangement has been favored in the past for on-grade applications because it readily permits alignment adjustment and provides a certain amount of vibration absorp tion.
- the tie on ballast method is unsuitable because of the additional deadweight load produced by the ballast and ties.
- the tie-on ballast method is likewise unsuitable for subsurface systems because of the additional space required in the structure used to form the required tunnel.
- the rails of some subway systems have been mounted on short sections of wood ties embedded in concrete.
- the rails are fastened to a steel tie plate which is in turn secured to the wooden ties by spikes.
- This method suffers from several important disadvantages.
- the problems of replacing an article previously embedded in concrete are quite well known.
- Another disadvantage of the embedded tie arrangement is that because of the thickness of the tie, the tunnel must be at least a foot higher than is otherwise necessary in order to accommodate the thickness of the wood tie. This is a particularly undesirable feature since the larger the required tunnel size, the more costly the tunnel.
- a differential pressure wave is caused to build up in the track in front of the vehicle because of the leverage action which results from the localized vertical forces applied to the rails by the wheels of the vehicle.
- a given portion of the track is subjected to first an upward force as the vehicle approaches and then a downward force as the wheels roll thereover.
- this wavelike track motion will produce a pounding action between the rail and the support-' to absorb the shock and dissipate some of the energy in order to attenuate the noise which would otherwise be transmitted into surrounding buildings, etc.
- Still another feature which must be provided for by the rail fastener is that 'of electrically isolating the rails from the supporting structure. Although it is most difficult to provide complete isolation of the rails, leakage must be limited to a reasonable value throughout the track, or signalling equipment will not operate properly and adequate power cannot be transferred to the vehicle.
- the fastener must have a capability which it must be able to securelyfasten the rail relative to the support structure and limit movement thereof to within acceptable tolerances in the vertical, lateral, and longitudinal directions.
- the track is subjected to both an upward and a downward force and the fastener must be capable of accommodating these forces in both directions.
- the rails may be subjected to lateral loads in the neighborhood of 5,000 pounds or more and the fastener must be capable of preventing the rails from twisting or being displaced laterally in excess of an allowable small deflection.
- accelerating forces, decelerating forces and expansion and contraction forces due to temperature variations will tend to cause the rail to move in the longitudinal direction and the fastener must be capable of clamping the rail tightly enough to prevent such movement.
- Another object of the present invention is to provide a novel direct fixation rail fastening apparatus having shock absorbing properties for dampening rail vibration so as to reduce the transmission thereof from rail to support.
- Still another object of the present invention is to provide a novel direct fixation rail fastening apparatus which is capable of electrically isolating the rail from thesupport structure.
- Still another object of the present invention is to provide a novel direct fixation rail fastening apparatus having means for allowing rail alignment adjustment.
- Still another object of the present invention is to provide a novel rail fastener apparatus for securely affixing a rail directly to a rigid support structure and preventing relative movement therebetween in any direction in excess of predetermined limits.
- Still another object of the present invention is to provide a novel rail fastener apparatus for direct fixation of a steel rail to a concrete or steel support structure, said fastener apparatus having each of the above characteristics.
- the rail fastener of the present invention is in a preferred embodiment essentially comprised of a pair of steel plates bonded together by a layer of elastomeric material which is capable of electrically isolating the plates one from the other while, at the same time, securing the plates against excessive relative movement.
- the elastomeric material must be firm enough to withstand high compressive loads yet resilient enough to dampen certain rail vibrations.
- a rail is secured to the upper steel plate of the fastener by means of a pair of adjustable clamping devices which permit the selective positioning of the rail relative to the upper plate within a predetermined tolerance.
- the lower plate of the fastener is secured to a rigid rail support structure by means of a pair of sleeved bolts which pass through apertures in the upper plate and are electrically isolated therefrom by said elastomeric material.
- a principal advantage of the present invention is that it provides a means for directly affixing a rail to a rigid structure while, at the same time, damping vibrations transmitted therebetween and electrically isolating the rail from the support structure. This is accomplished by means of the free floating," nonmetallic relationship provided between the respective plates by the elastomeric bonding material.
- Another advantage of the present invention is that it is compact in construction and can be installed by one man using ordinary manual tools.
- Still another advantage of the present invention is that because of its rugged construction the fastener will have a useful life which is at least as long as the design life of the rail which it secures.
- Still another advantage of the present invention is that it requires less than 2 inches of the space between the bottom of the rail and the top of the support structure.
- FIG. 1 is a perspective illustration of a section of track and support structure showing the manner in which the present invention may be utilized.
- FIG. 2 is a schematic illustration of a direct fixation rail fastening device in accordance with the present invention.
- FIG. 3 is a cross section taken along the lines 33 of the rail fastening device illustrated in FIG. 2.
- FIG. 4 is a cross section taken across the lines 4-4 of the rail fastening device illustrated in FIG. 2.
- FIG. 1 of the drawing there is shown a section of a concrete structure which may be of the type utilized in tunnels or aerial structures to support a rapid transit trackway.
- the structure 10 which may be either a preformed member or a member formed in place, is installed in place and left unloaded for a predetermined period of time in order to account for normal structural settling.
- the slabs 12 are poured to design grade and the rails 14 are affixed directly thereto by means of the fasteners 16 are provided in accordance with the present invention.
- a third rail 18 is mounted to the side of the structure 10 for supplying high voltage electricity to the electrically operated vehicles used in the rapid transit system.
- the fastener 16 includes a steel rail plate 20 having two circular holes 22 passing therethrough at opposite corners and two elongated slots 24 cut therein in the remaining opposite corners.
- the rail plate 20 is typically made of high strength steel of a nominal one-half inch thickness.
- the elastomeric material 28 must be rigid enough to withstand a predetermined range of tensile and compressive forces while at the same time being capable of providing the required vibrational isolation as well as electrical isolation between the rail plate 20 and the baseplate 26.
- the elastomeric layer is threeeighths inch thick.
- the elastomeric layer 28 is illustrated as being of a homogeneous solid mass it is to be understood that the material comprising the layer 28 could just as well be cellular, corrugated or of any other suitable form capable of providing the desired load bearing, vibrational dampening and electrical isolating characteristics.
- the ends 30 of the baseplate 26 are turned upwardly and extend to the top of the plate 20 so as to resist excessive displacement of the plate 20 in the lateral direction relative to the baseplate 26 in response to high lateral loads.
- the amount of permitted movement between the rail plate 20 and the baseplate 26 in the lateral direction is not determined by the sheer strength of the elastomer 28 alone.
- This feature provides an additional resistance to lateral movement in the form of tensile and compressive forces applied between the ends 32 of the plate 20 and the ends 30 of the plate 26 via the layers of elastomer 34 which separate the two plates.
- the slots 24 in the rail plate 20 include enlarged portions 36 through which the heads 38 of the bolts 40 may be inserted. After insertion the bolts 40 may be slidably positioned anywhere along the slots 24 so that the heads 38 bear against the lower side of the rail plate 20 when an upward force is applied to the bolts 40. It will be noted that in order to accommodate the heads 38 of the bolts 40, portions of the elastomer 28 have been removed in the vicinities of the slots 24. It is, however, preferable to leave a thin layer of the elastomer over the top of the baseplate 26 to insure against accidental shorting between the bolt head 38 and the plate 26 because of water, oil or foreign objects which may become trapped within the passageway 42.
- the fastener 16 is typically mounted to the concrete slab 12 over a polyethylene gasket or pad 44 and is rigidly secured to the slab 12 by means of a pair of bolts 46 which are threaded into inserts 48 provided in the concrete bed.
- the pad 44 is merely a shimming means to accommodate vertical alignment of the rail 14 and is not a part of the fastener 16.
- the pad 44 may be of any suitable shimming material and is only shown as polyethylene for purposes of illustration.
- the bolts 46 do not apply any compressive force to the rail plate 20, but only engage the baseplate 26 via the cylindrical spacers or sleeves 50 which extends slightly above the upper surface of the elastomeric areas 52 which are raised around the bolt holes 22.
- the flat washers 53 are slightly separated from the raised elastomeric areas 52 and do not intentionally transmit any force to the top of the rail plate 20, but merely facilitate tightening of the bolts 46. They-do, however, provide an incidental function of preventing the entry of foreign matter into the boltways between the bolts 46 and the sleeves 50.
- the clips 54 have one side adapted to engage the lower flanges 56 of rail 14, and include a chisellike projection 58 on the other side thereof for frietionally engaging the upper surface of the rail plate 20.
- the serrations 64 provide for an increased frictional engagement between the clip 58 and the upper surface of the rail plate 20. Although preferable, the serrations 64 are not absolutely necessary in most instances since the frictional engagement obtained between the edges 58 of the clips 54 are the upper surface of the plate 20 by tightening the nuts 62 is sufficient to lock the rail.
- lock washers 66 are provided between the nuts 62 and the top of the clips 54 so that once the nuts 62 have been properly torqued, the edges 68 of the washers 66 can be bent up against one of the faces of the nuts 62 so as to prevent the unintentional loosening thereof.
- a similar means could likewise be provided for the bolts 46 where deemed necessary.
- the fastener devices 16 of the present invention can be mounted to the slab 12 by merely inserting the bolts 46 through the appropriate apertures in the fastener device, and then bolting the device directly to the slab 12.
- the rails 14 can then be positioned over the rail plates 20 andaligned with the required degree of precision.
- the rail clips 54 can be inserted into the slots 24 and positioned to engage the flange 56 of the rail 14. With the clips 54 so positioned, the nuts 62 are tightened to the desired torque, the locking clip 68 is bent into engagement with the nut 62, and the operation is complete.
- a fastener device for fastening a rail means to a supporting structure and providing vibrational dampening and electrical isolation between the rail means and'the supporting structure comprising:
- first and second plate means being separated by said layer of elastomeric material, said elastomeric material being securely bonded to the adjacent faces of said first and second plate means, at least one edge of said first plate means being bent upwardly and outside of the overlying edge of said second plate means and extending upwardly at least as far as the lower surface of said second plate means, the proximate extremities of said first and second plate means being separated by a portion of said elastomeric material which acts as a spacer therebetween whereby said one edge serves to limit lateral motion of said first plate means relative to said second plate means; and
- securing means for securing said second plate means to the rail means, said securing means including bolt means which extend through the apertures in both of said first and second plate means and corresponding apertures in said separating layer of elastomeric material, and metallic sleeve means extending through the apertures in said second plate means and engaging the upper surface of said first plate means to transmit the force applied to said bolt means directly to said first plate means, said bolt means and said sleeve means being electrically insulated from said second plate means by said elastomeric material.
- Rail fastener apparatus for directly affixing a rail to a rigid support structure comprising:
- upper plate means having a pair of parallel side edges, said upper plate means including means for securing the rail to the upper side thereof with the longitudinal axis of the rail lying parallel to said parallel side edges;
- lower plate means having its upper side bonded to said layer of elastomeric material, said lower plate means having upturned side portions extending outside of said parallel side edges and terminating substantially flush with said upper side of said upper plate means, said side edges being separated from said side portions by a separating portion of said layer of elastomeric material whereby lateral motion of said upper plate means relative to said lower plate means is restrained to within predetermined limits;
- Rail fastener apparatus as recited in claim 5 wherein said elastomeric material is of sufficient thickness to electrically isolate said upper plate means from said lower plate means when said fastener apparatus is subjected to normal operating load conditions.
- Rail fastener apparatus as recited in claim 6 wherein the thickness of said elastomeric material which separates said upper plate means from said lower plate means is firm enough to prevent substantial reduction in the separation between said upper and lower plate means under normal load conditions yet is resilient enough to absorb a substantial amount of the vibrational energy which would otherwise be transmitted from said rail to said support structure.
- said means for securing said lower plate means to said support structure is a bolt means which extends upwardly through an aperture in said upper plate means so that access is provided to said securing means.
- Rail fastener apparatus as recited in claim 8 wherein an opening is provided in the side of said apparatus leading to said slot means for providing drainage thereof.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Railway Tracks (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
Claims (11)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80248069A | 1969-02-26 | 1969-02-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3576293A true US3576293A (en) | 1971-04-27 |
Family
ID=25183811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US802480A Expired - Lifetime US3576293A (en) | 1969-02-26 | 1969-02-26 | Direct fixation rail fastener apparatus |
Country Status (1)
Country | Link |
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US (1) | US3576293A (en) |
Cited By (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3738280A (en) * | 1969-07-18 | 1973-06-12 | M Barthalon | Beam-track assembly for air-lift or magnetic-lift vehicles |
US3758032A (en) * | 1971-11-03 | 1973-09-11 | Resilient Grip Ltd | Rail fastening arrangements |
US3784097A (en) * | 1972-10-13 | 1974-01-08 | Landis Sales Co | Direct fixation rail fastener |
US3819114A (en) * | 1972-05-17 | 1974-06-25 | Ny City Transit Authority | Railroad track assembly |
US3826423A (en) * | 1970-02-10 | 1974-07-30 | Clung R Mc | Rail seat and support structure |
US3826424A (en) * | 1971-12-15 | 1974-07-30 | Illinois Tool Works | Rail seat and support structure |
US3858804A (en) * | 1972-08-28 | 1975-01-07 | Hixson R M | Rail fastening assembly |
US3907200A (en) * | 1972-10-24 | 1975-09-23 | Regie Autonome Transports | Track and method of laying track on a concrete road bed |
US4047663A (en) * | 1975-11-21 | 1977-09-13 | Clarke Reynolds | Rail plate having spring clips and lateral positioning means |
US4062490A (en) * | 1976-05-21 | 1977-12-13 | Transit Products Company, Inc. | Rail fastening clips |
US4190200A (en) * | 1978-03-17 | 1980-02-26 | Scotco, Inc. | Rail clip assembly |
US4275832A (en) * | 1977-11-18 | 1981-06-30 | Dunlop Limited | Resilient support means |
US4307837A (en) * | 1980-06-13 | 1981-12-29 | Lord Corporation | Adjustable spring clip |
US4325510A (en) * | 1980-06-23 | 1982-04-20 | Lord Corporation | Adjustable spring clip |
US4326670A (en) * | 1980-06-23 | 1982-04-27 | Lord Corporation | Adjustable spring clip |
US4494695A (en) * | 1980-09-29 | 1985-01-22 | Sonneville International Corporation | Device for affixing a rail to a concrete support |
US4561589A (en) * | 1983-05-24 | 1985-12-31 | Hixson Richard M | Rail fastening assembly |
US4572431A (en) * | 1981-06-22 | 1986-02-25 | Penta Construction Corp. | Rail fastener assembly |
EP0191308A2 (en) * | 1985-02-01 | 1986-08-20 | CLOUTH Gummiwerke AG | Seat of a rail with resiliently supported tie-plate |
EP0201382A1 (en) * | 1985-04-17 | 1986-11-12 | COGIFER (Compagnie Générale d'Installations Ferroviaires) | Support and fastening device of a railroad rail |
US4715533A (en) * | 1986-04-01 | 1987-12-29 | Bucksbee James H | Rail fastener assembly with horizontal flanges |
US4844338A (en) * | 1986-12-05 | 1989-07-04 | Lord Corporation | Rail fastener |
US4915298A (en) * | 1987-06-10 | 1990-04-10 | Hermann Ortwein | Rail mount for railway-type rails |
US4967954A (en) * | 1988-12-15 | 1990-11-06 | American Track Systems, Inc. | Rail fastening device |
US5022584A (en) * | 1988-12-27 | 1991-06-11 | Lord Corporation | Rail-fastening for rails |
US5249743A (en) * | 1992-04-23 | 1993-10-05 | Lord Corporation | Multiple section special trackwork fastener |
US5485955A (en) * | 1994-07-11 | 1996-01-23 | Kerr-Mcgee Chemical Corporation | Rail-tie fastening assembly for concrete tie |
US6045052A (en) * | 1998-04-02 | 2000-04-04 | Airboss Of America Corp. | Rail tie fastening assembly |
US6343748B1 (en) | 2000-08-31 | 2002-02-05 | Ksa Limited Partnership | Concrete railroad tie insulator spacer and fastening system |
US6572027B1 (en) | 2002-04-09 | 2003-06-03 | Ksa Limited Partnership | Concrete railroad tie two-piece insulator spacer and fastening system |
US7063269B2 (en) * | 2000-08-05 | 2006-06-20 | Godfrey Matthew Owen Molyneux | Rail support plate and related system |
WO2006131090A1 (en) * | 2005-06-09 | 2006-12-14 | Rail.One Gmbh | Ballastless track for rail vehicles |
WO2007062646A2 (en) * | 2005-11-30 | 2007-06-07 | Walter Sobolewski | Tubular, hollow, solid guideway beams |
US20080121732A1 (en) * | 2006-11-28 | 2008-05-29 | Yung-Yi Chen | Laminated tie plate |
US20080191049A1 (en) * | 2005-04-02 | 2008-08-14 | Herman-Josef Loffelsend | Rail seat |
US20100170956A1 (en) * | 2009-01-05 | 2010-07-08 | Dynamic Composites, LLC | Railroad cross tie and method of manufacture |
US20110068183A1 (en) * | 2009-09-18 | 2011-03-24 | Vossloh-Werke Gmbh | Base Plate for Fastening a Rail on a Solid Ground and Fastening of a Rail |
US20110068185A1 (en) * | 2009-09-18 | 2011-03-24 | Vossloh-Werke Gmbh | System for Fastening a Rail to a fixed Bottom Support, and Fastener for a Rail |
US20110168796A1 (en) * | 2010-01-12 | 2011-07-14 | Larry Laurello | Method, system and devices for railroad track reconditioning and repair |
US20110204154A1 (en) * | 2008-08-14 | 2011-08-25 | Vossloh Werke Gmbh | Device for mounting railroad tracks on a substructure |
ES2373740A1 (en) * | 2011-10-13 | 2012-02-08 | Railtech Sufetra, S.A. | Rail-positioning system |
CN104179081A (en) * | 2014-08-19 | 2014-12-03 | 河北翼辰实业集团有限公司 | Rail fastener system without elastic strips |
US9293281B2 (en) * | 2014-04-29 | 2016-03-22 | Abb Technology Ag | Tank mounting structure for dead tank circuit breaker |
WO2018022214A1 (en) | 2016-07-25 | 2018-02-01 | Progress Rail Services Corporation | Mechanism and system for fastening track rail to a substrate and track rail fastening method |
EP3290583A1 (en) * | 2016-09-02 | 2018-03-07 | Duro Felguera Rail, S.A.U. | Modular rail fastening system |
US11680374B2 (en) | 2020-01-03 | 2023-06-20 | Progress Rail Services Corporation | Direct fixation fastener assembly for track rail having molded support block and method of making same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1550924A (en) * | 1920-12-13 | 1925-08-25 | John G Snyder | Rail tie and fastener |
US2146341A (en) * | 1933-12-12 | 1939-02-07 | Kahn Myrtil | Permanent ways |
US2656116A (en) * | 1947-04-08 | 1953-10-20 | Arthur Wm Nelson | Rail and tie fastening assembly |
-
1969
- 1969-02-26 US US802480A patent/US3576293A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1550924A (en) * | 1920-12-13 | 1925-08-25 | John G Snyder | Rail tie and fastener |
US2146341A (en) * | 1933-12-12 | 1939-02-07 | Kahn Myrtil | Permanent ways |
US2656116A (en) * | 1947-04-08 | 1953-10-20 | Arthur Wm Nelson | Rail and tie fastening assembly |
Cited By (66)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3738280A (en) * | 1969-07-18 | 1973-06-12 | M Barthalon | Beam-track assembly for air-lift or magnetic-lift vehicles |
US3826423A (en) * | 1970-02-10 | 1974-07-30 | Clung R Mc | Rail seat and support structure |
US3758032A (en) * | 1971-11-03 | 1973-09-11 | Resilient Grip Ltd | Rail fastening arrangements |
US3826424A (en) * | 1971-12-15 | 1974-07-30 | Illinois Tool Works | Rail seat and support structure |
US3819114A (en) * | 1972-05-17 | 1974-06-25 | Ny City Transit Authority | Railroad track assembly |
US3858804A (en) * | 1972-08-28 | 1975-01-07 | Hixson R M | Rail fastening assembly |
US3784097A (en) * | 1972-10-13 | 1974-01-08 | Landis Sales Co | Direct fixation rail fastener |
US3907200A (en) * | 1972-10-24 | 1975-09-23 | Regie Autonome Transports | Track and method of laying track on a concrete road bed |
US4047663A (en) * | 1975-11-21 | 1977-09-13 | Clarke Reynolds | Rail plate having spring clips and lateral positioning means |
US4062490A (en) * | 1976-05-21 | 1977-12-13 | Transit Products Company, Inc. | Rail fastening clips |
US4275832A (en) * | 1977-11-18 | 1981-06-30 | Dunlop Limited | Resilient support means |
US4190200A (en) * | 1978-03-17 | 1980-02-26 | Scotco, Inc. | Rail clip assembly |
US4307837A (en) * | 1980-06-13 | 1981-12-29 | Lord Corporation | Adjustable spring clip |
US4325510A (en) * | 1980-06-23 | 1982-04-20 | Lord Corporation | Adjustable spring clip |
US4326670A (en) * | 1980-06-23 | 1982-04-27 | Lord Corporation | Adjustable spring clip |
US4494695A (en) * | 1980-09-29 | 1985-01-22 | Sonneville International Corporation | Device for affixing a rail to a concrete support |
US4572431A (en) * | 1981-06-22 | 1986-02-25 | Penta Construction Corp. | Rail fastener assembly |
US4561589A (en) * | 1983-05-24 | 1985-12-31 | Hixson Richard M | Rail fastening assembly |
EP0191308A2 (en) * | 1985-02-01 | 1986-08-20 | CLOUTH Gummiwerke AG | Seat of a rail with resiliently supported tie-plate |
EP0191308A3 (en) * | 1985-02-01 | 1987-08-19 | CLOUTH Gummiwerke AG | Seat of a rail with resiliently supported tie-plate |
US4723706A (en) * | 1985-02-01 | 1988-02-09 | Clouth Gummiwerke Aktiengesellschaft | Rail support |
EP0201382A1 (en) * | 1985-04-17 | 1986-11-12 | COGIFER (Compagnie Générale d'Installations Ferroviaires) | Support and fastening device of a railroad rail |
US4715533A (en) * | 1986-04-01 | 1987-12-29 | Bucksbee James H | Rail fastener assembly with horizontal flanges |
US4844338A (en) * | 1986-12-05 | 1989-07-04 | Lord Corporation | Rail fastener |
US4915298A (en) * | 1987-06-10 | 1990-04-10 | Hermann Ortwein | Rail mount for railway-type rails |
US4967954A (en) * | 1988-12-15 | 1990-11-06 | American Track Systems, Inc. | Rail fastening device |
US5022584A (en) * | 1988-12-27 | 1991-06-11 | Lord Corporation | Rail-fastening for rails |
US5249743A (en) * | 1992-04-23 | 1993-10-05 | Lord Corporation | Multiple section special trackwork fastener |
EP0627525A1 (en) * | 1992-04-23 | 1994-12-07 | Lord Corporation | Multiple section special trackwork fastener |
US5485955A (en) * | 1994-07-11 | 1996-01-23 | Kerr-Mcgee Chemical Corporation | Rail-tie fastening assembly for concrete tie |
US5494212A (en) * | 1994-07-11 | 1996-02-27 | Kerr-Mcghee Chemical Corporation | Rail-tie fastening method for concrete tie |
US6045052A (en) * | 1998-04-02 | 2000-04-04 | Airboss Of America Corp. | Rail tie fastening assembly |
US7063269B2 (en) * | 2000-08-05 | 2006-06-20 | Godfrey Matthew Owen Molyneux | Rail support plate and related system |
US6343748B1 (en) | 2000-08-31 | 2002-02-05 | Ksa Limited Partnership | Concrete railroad tie insulator spacer and fastening system |
US6572027B1 (en) | 2002-04-09 | 2003-06-03 | Ksa Limited Partnership | Concrete railroad tie two-piece insulator spacer and fastening system |
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