EP0828891B1 - Ensembles de fixation de rail de chemin de fer comprenant des crapauds de fixation de rail resilients, et isolateurs associes - Google Patents

Ensembles de fixation de rail de chemin de fer comprenant des crapauds de fixation de rail resilients, et isolateurs associes Download PDF

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Publication number
EP0828891B1
EP0828891B1 EP96909213A EP96909213A EP0828891B1 EP 0828891 B1 EP0828891 B1 EP 0828891B1 EP 96909213 A EP96909213 A EP 96909213A EP 96909213 A EP96909213 A EP 96909213A EP 0828891 B1 EP0828891 B1 EP 0828891B1
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EP
European Patent Office
Prior art keywords
insulator
clip
rail
bearing portion
assembly
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Expired - Lifetime
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EP96909213A
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German (de)
English (en)
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EP0828891A1 (fr
Inventor
Timothy Alan Wood
Kevin Stubbs
Stephen John Cox
Martin David Somerset
Brian George Conroy
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Pandrol Ltd
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Pandrol Ltd
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    • 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
    • E01B9/28—Fastening on wooden or concrete sleepers or on masonry with clamp members
    • E01B9/30—Fastening on wooden or concrete sleepers or on masonry with clamp members by resilient steel clips
    • E01B9/303—Fastening on wooden or concrete sleepers or on masonry with clamp members by resilient steel clips the clip being a shaped bar

Definitions

  • the present invention relates to railway rail fastening assemblies including resilient railway rail fastening clips and associated insulators.
  • the present applicant proposed a new form of insulator in which the toe and post portions are separate, the clip carrying the toe portion of the insulator and the post portion of the insulator being held in place by the anchoring device.
  • an insulator system is provided in which it is possible to fit the post insulator to a clip anchoring device before the rail is laid, thereby facilitating track installation by simplifying the job of fitting insulators and reducing the number of loose components delivered to the site of installation.
  • the use of separate toe and post insulators allows the post insulator to be replaced separately from the toe insulator, and vice versa.
  • Prior art "captive" toe insulators such as that disclosed in WO93/12295 which clip onto a bend in the rail fastening clip and that disclosed in GB-A-2106571 which is glued onto the clip, are firmly secured to the clip and present a fixed bearing surface to the rail foot.
  • the position of the contact point between the toe insulator and the rail flange, and the size of the bearing area vary such that in these conditions certain parts of the toe insulator are subjected to undesirably high pressure, thereby accelerating wear of the toe insulator.
  • an assembly for use in fastening a railway rail to an underlying rail foundation which assembly comprises a resilient railway rail fastening clip, having at least one portion of substantially circular cross-section which when in use bears on, and extends substantially parallel to, a flange of an adjacent railway rail, and an insulator for electrically insulating the clip from the rail which is retained on the rail bearing portion of the clip when in use, characterised in that the insulator is held in engagement with the clip such that the insulator is mounted for rotational displacement, under normal operating conditions, about the longitudinal axis of the said rail bearing portion, whereby the insulator is self-aligning on the rail flange.
  • an insulator for electrically insulating a resilient railway rail clip from a railway rail which is retained on a rail bearing portion of the clip when in use, characterised in that the insulator is configured so as to be held in engagement with the clip so as to allow rotational displacement of the insulator, under normal operating conditions, about the longitudinal axis of the said rail bearing portion, whereby the insulator is self-aligning on a flange of the rail.
  • a resilient railway rail fastening clip having at least one portion of substantially circular cross-section which when in use bears on, and extends substantially parallel to, a flange of an adjacent railway rail, and on which an insulator, for electrically insulating the clip from the rail, may be retained when in use, characterised in that part of the said rail bearing portion of the clip cooperates with part of the said insulator so as to limit longitudinal displacement of the insulator on the said rail bearing portion during driving of the clip onto the rail flange, whilst permitting rotational displacement thereof.
  • an insulator embodying the present invention is held in engagement with the clip such that it is free to rotate, at least partly, about the longitudinal axis of the rail bearing portion of the clip. It should be noted that in the present specification rotational displacement is intended to mean a movement about the longitudinal axis of the rail bearing portion of the clip which is not necessarily through 360°, and may indeed be very much smaller.
  • the self-alignment of the assembly is such that whatever the geometry of the rail fastening arrangement there is always a normal contact between the insulator and the rail flange.
  • a clip and insulator assembly embodying the present invention is self-conforming to the actual contact geometry between the rail bearing portion of the clip and the rail flange.
  • This self-aligning capability of the insulator on the clip enables the same clip and insulator assembly to be employed in a wide range of fastening installations, even where the design of various other components of the installation (such as the design of the rail flange) vary.
  • an assembly embodying the first aspect of the present invention has the further advantages of being able to accommodate such dynamic movement of the rail under load without frictional abrasion at the bearing contact point, thus extending toe insulator life, and being able to protect the clip from high lateral strains, since the rotation of the insulator prevents loads from being induced in the clip.
  • a simple change to existing types of clip can result in significant improvements to a variety of widely-used rail fastening assemblies.
  • Either the insulator, the rail bearing portion of the clip or both are provided with means, permitting rotational displacement of the insulator, for limiting longitudinal displacement of the insulator on the rail bearing portion during driving of the clip onto the rail flange.
  • the rail bearing portion of the rail fastening clip may include an axially-local change or displacement in transverse cross-section which is adapted to engage with a corresponding change in internal cross-section of a toe insulator for attachment to the rail bearing portion to limit displacement of the insulator on the rail bearing portion so as to counter any tendency during installation, and/or in use, for the insulator to move too far along the rail bearing portion.
  • the change or displacement in transverse section preferably, but not exclusively, comprises: one or more recesses or circumferential grooves for engaging with corresponding projections on the insulator; an offset, which may or may not involve any change in the transverse section, one or more tabs, or circumferential protrusions for engaging with corresponding recesses or grooves on the internal surface of the insulator; a threaded portion for engaging with a corresponding thread on the insulator; one or more tabs acting as stops at one or both ends of the rail bearing portion of the clip; a local narrowing of axial cross-section which is such that the insulator can move freely about the narrowed part, but cannot move beyond it as the unnarrowed diameter of the clip is greater than the passageway or recess of the insulator; or other reduction or increase in width or diameter of the rail bearing portion, as appropriate.
  • the insulator has two or more load bearing surfaces, and the insulator may be rotationally displaced so as to change which of the load bearing surfaces of the insulator is presented to the rail flange.
  • the insulator may be rotated about the rail bearing portion so as to present an unworn load bearing surface to the rail flange.
  • an insulator embodying the present invention can be rotated so as to adjust the height of the rail bearing portion above the rail flange.
  • the height of a rail, sitting on an elastomeric pad, with respect to an adjacent anchoring device will gradually decrease as the pad wears. This causes a reduction of the toe load exerted on the rail by the clip.
  • an insulator with an offset recess or passageway can be rotated such that the deflection of the clip is increased, hence increasing the toe load exerted by the clip.
  • the insulator may be employed to adjust the toe load applied by the clip without the need to change the insulator or the clip itself. Furthermore, such a clip and insulator assembly may reduce the cost, and facilitate construction, of new track, since the height of the shoulders need be set only approximately and the insulator rotated so as to adjust the installation to the correct height.
  • the exterior of an insulator embodying the present invention may be of any shape.
  • embodiments of the insulator may have one, two, three, four, five, six or more load bearing surfaces.
  • the insulator has a polygonal, or part-polygonal, cross-section.
  • There may be a radius on the or each load bearing surface which may vary and may be such as to aid self-alignment of the insulator.
  • the or each load bearing surface may be shaped such that the cross-section of the insulator is circular or elliptical, or part-circular or part-elliptical.
  • One or more of the load bearing surfaces themselves may be part-cylindrical (circular or elliptical).
  • Each load bearing surface of an insulator embodying the present invention is preferably, but not essentially, of substantially equal size.
  • An insulator embodying the present invention may be formed with a longitudinal recess shaped so as to clip onto the rail bearing portion of the clip, or with a passageway therein to receive the rail bearing portion of the clip.
  • This recess or passageway may have a blank or open end.
  • the passageway or longitudinal recess is located such that the insulator and the rail bearing portion of the clip are co-axial, but in an insulator embodying the present invention the passageway or recess need not be centrally located in the insulator, so it may be employed for height adjustment, as described above.
  • An assembly embodying the present invention can employ any one of a number of different types of rail fastening clip, providing the rail bearing portion of the clip extends substantially parallel to the line of the rail, has a substantially circular cross-section and can be appropriately adapted so as to limit longitudinal displacement of the insulator therealong.
  • clips which may be advantageously employed include those described in: GB-1,510,224 (known as “e”-clips), GB-861,473 (known as “PR” clips), GB-A-2,211,229 (known as “Sonata” clips), WO93/12296 ("M”-clips), EP-A-0401424 (“SKL” clips) or US-4,304,359 (“Z"-clips). This list is not exhaustive.
  • the "e”-clip, “Sonata”-clip and “Z”-clip have a rail bearing portion which is at one of the free ends of the clip.
  • the "SKL” clip has two free ends which bear on the rail.
  • the "M”-clip has a portion between the two inner legs of the "M” which bears on the rail.
  • the rail bearing portion of a "PR” clip is a bent part of the clip located between two arches thereof.
  • Figures 1 and 2 show, respectively, an e-shaped and a Z-shaped clip.
  • Figure 3 shows a rail fastening assembly including the e-shaped clip of Figure 1, but the Z-shaped clip of Figure 2 may alternatively be used therewith.
  • the clips of Figures 1 and 2 and the arrangement of Figure 3 are representative of the clips and arrangements as published under GB 1,510,224 and US 4,304,359.
  • the clips of Figures 1 and 2 each comprise a free end portion 1, a crossover arm 2 and a central leg 3.
  • the crossover arm 2 has a heel part 2a which, in use, bears on part of an anchoring device or shoulder 200 secured to a rail foundation 100 adjacent to a rail 300 to be fastened.
  • the free end portion 1 has a rail bearing portion or toe 1a which bears on a flange 301 of the rail 300.
  • the central leg 3 is received in a housing 201 in the shoulder 200 and the toe portion 1a bears on a one-part insulating member 50 on the upper surface of the rail flange 301.
  • the insulating member 50 has a toe portion 50a which is seated on the rail flange 301 and a post portion 50b which extends between the edge of the rail flange 301 and an adjacent part of the shoulder 200.
  • Figures 4a and 4b show a clip, which is M-shaped in plan, in an operative disposition in a rail fastening assembly.
  • the M-shaped clip is similar to that described in WO93/12296.
  • a part joining the inner legs 6 of the M serves as a rail bearing portion 6a, free ends 7a of the outer legs 7 of the M engaging a shoulder 21 and overhanging the rail 300 when in use.
  • the assembly of Figures 4a and 4b also comprises respective toe and post insulators 50a' and 50b', the toe insulator 50a' being carried by the rail bearing portion 6a of the clip.
  • the rail fastening assembly of Figure 5 is similar to that of Figure 3 in some respects, and like parts in Figure 5 are denoted by the same reference numerals as have been used in Figure 3. Unlike the assembly of Figure 3, however, the assembly of Figure 5 has a two-part insulator system comprising a post insulator 130 and a toe insulator 13, which toe insulator 13 is rotatable about the longitudinal axis of the toe portion 1a of the clip.
  • the toe insulator 13 of Figure 5 is shown in more detail in Figures 6a and 6b.
  • the insulator 13 has a load bearing surface 13c which is semi-circular in cross-section, and a longitudinal recess 12, having a depression 14 formed at the closed end of the insulator, for clipping onto the rail bearing portion of an appropriately adapted clip, such as that shown in Figure 10d.
  • FIG. 7a and 7b A modified form of the toe insulator 13 of Figures 6a and 6b is shown in Figures 7a and 7b.
  • the transverse cross-section of this insulator 13' resembles part of a hexagon, except insofar that the material which would otherwise form the corners of the hexagon has been omitted to allow clearance as the pad beneath the rail wears.
  • the external surface of the insulator 13' has three substantially equally-sized faces 13a, each having a slight radius, between which there are grooves 13b.
  • Figures 8a to 8d show alternative insulator shapes.
  • the insulator of Figure 8a has a triangular cross-section, that of Figure 8b a square cross-section, that of Figure 8c a pentagonal cross-section and that of Figure 8d a circular cross-section. It should be noted that these examples are merely some of many possible insulator shapes.
  • the recess 12 or passageway 12' is centrally located, but if the insulator is to be used for height adjustment, as described above, the recess 12 or passageway 12' is offset, as shown in Figure 9.
  • Figures 10a to 10d show examples of the way in which the toe portions 1a of clips to which the invention is applied may be adapted to retain the insulator in such a way as to prevent longitudinal displacement thereof in use whilst permitting rotation of the insulator.
  • Figure 10a shows an annular groove 8 formed on the toe portion 1a of a clip intended to be used with an insulator 13, 13' having a circumferential protrusion formed inside the recess 12 or passageway 12' thereof.
  • Figure 10b shows an annular projection 9 formed on the toe portion 1a of a clip intended to be used with an insulator 13, 13' having a circumferential groove formed inside the recess 12 or passageway 12' thereof.
  • Figure 10c shows the toe 1a of a clip formed with a rolled thread 10 to engage with a corresponding thread formed within the recess 12 or passageway 12' of an insulator 13, 13'.
  • Figure 10d shows an offset 11 formed at the toe portion 1a of a clip for engaging a recess or depression 14 in an insulator 13 such as shown in Figure 8a.
  • connection between the insulator of Figures 5 to 10 and the rail bearing portion of the clip must be loose enough to allow the desired degree of rotation of the insulator on the toe of the clip, such that under the forces applied thereto in use the insulator is caused to rotate about the clip toe so as to substantially maintain optimum contact between the insulator and the rail flange.
  • insulators for use in assemblies embodying the present invention are preferably attached to the clips before delivery to the site of installation.

Claims (36)

  1. Ensemble à utiliser pour fixer un rail (300) de chemin de fer à une fondation (100) de rail sous-jacente, lequel ensemble comprend un crapaud (1, 2, 3) de fixation de rail de chemin de fer résilient, ayant au moins une partie (1) de section transversale sensiblement circulaire qui, quand elle est en service, s'appuie sur une aile (301) d'un rail (300) de chemin de fer adjacent et s'étend de manière essentiellement parallèle à celle-ci, et un isolateur (13, 13') pour isoler électriquement le crapaud (1, 2, 3) du rail (300) qui est retenu sur la partie (1) du crapaud (1, 2, 3) supportant sur le rail quand il est en service, caractérisé en ce que l'isolateur (13, 13') est maintenu en prise avec le crapaud (1, 2, 3) de sorte que l'isolateur (13, 13') est monté pour un déplacement rotatif, dans des conditions de fonctionnement normales, autour de l'axe longitudinal de ladite partie (1) supportant le rail, l'isolateur (13, 13') s'alignant automatiquement sur l'aile du rail (301).
  2. Ensemble comme revendiqué dans la revendication 1, dans lequel l'isolateur (13) a une surface cylindrique supportant la charge.
  3. Ensemble comme revendiqué dans la revendication 1, dans lequel l'isolateur (13) a une surface hémi-cylindrique supportant la charge.
  4. Ensemble comme revendiqué dans la revendication 1, dans lequel l'isolateur (13, 13') a deux ou plusieurs surfaces (13a) supportant la charge, et en service l'isolateur (13, 13') peut être déplacé de manière rotative afin de changer celle des surfaces (13a) de l'isolateur (13, 13') supportant la charge qui est présentée à l'aile (301) du rail.
  5. Ensemble comme revendiqué dans la revendication 4, dans lequel l'épaisseur de matière entre les surfaces (13a) supportant la charge et une surface de l'isolateur (13, 13') qui entre en contact avec la partie (1) du crapaud (1, 2, 3) supportant le rail est amenée à varier entre des surfaces (13a) adjacentes supportant la charge de telle manière que l'isolateur (13, 13') puisse être mis en rotation afin d'ajuster la hauteur de la partie (1) supportant le rail au-dessus de l'aile (301) du rail.
  6. Ensemble comme revendiqué dans une quelconque des revendications précédentes, dans lequel l'isolateur (13, 13') est formé avec un évidement (12) longitudinal formé pour s'adapter sur la partie (1) du crapaud (1, 2, 3) supportant le rail.
  7. Ensemble comme revendiqué dans une quelconque des revendications 1 à 5, dans lequel l'isolateur (13) est formé avec un passage (12') en son sein pour recevoir la partie (1) du crapaud (1, 2, 3) supportant le rail.
  8. Ensemble comme revendiqué dans la revendication 6 ou 7, dans lequel l'évidement (12) ou le passage (12') est obturé à une extrémité.
  9. Ensemble comme revendiqué dans une quelconque des revendications précédentes, dans lequel ladite partie (1) du crapaud (1, 2, 3) supportant le rail est à une extrémité libre du crapaud.
  10. Ensemble comme revendiqué dans une quelconque des revendications 1 à 8, dans lequel ledit crapaud a deux parties supportant le rail aux extrémités libres respectives de celui-ci.
  11. Ensemble comme revendiqué dans une quelconque des revendications 1 à 8, dans lequel la partie du crapaud supportant le rail est une partie entre d'autres parties du crapaud.
  12. Ensemble comme revendiqué dans une quelconque des revendications précédentes, dans lequel une partie (8, 9, 10, 11) de ladite partie (1) du crapaud (1, 2, 3) supportant le rail coopère avec une partie dudit isolateur (13) afin de limiter le déplacement longitudinal de l'isolateur (13) sur ladite partie (1) supportant le rail pendant la propulsion du crapaud (1, 2, 3) sur l'aile (301) du rail, tout en permettant son déplacement rotatif.
  13. Ensemble comme revendiqué dans une quelconque des revendications précédentes, dans lequel la partie (1) du crapaud (1, 2, 3) de fixation du rail supportant le rail comprend un changement axialement local (8, 9, 10) ou déplacement transversal de la section transversale (11) qui est adapté pour entrer en prise avec un changement correspondant de la section transversale interne dudit isolateur (13).
  14. Ensemble comme revendiqué dans la revendication 13, dans lequel le changement axialement local (8, 9, 10) ou déplacement transversal de la section transversale (11) comprend un ou plusieurs évidements (8) ou rainures circonférentielles pour entrer en prise avec les projections correspondantes sur l'isolateur (13).
  15. Ensemble comme revendiqué dans la revendication 13, dans lequel le changement axialement local (8, 9, 10) ou déplacement transversal de la section transversale comprend un déport (11), une ou plusieurs pattes ou protubérances circonférentielles (9, 10) pour entrer en prise avec les évidements ou rainures correspondants sur la surface intérieure de l'isolateur (13).
  16. Ensemble comme revendiqué dans la revendication 13, dans lequel le changement axialement local de la section transversale comprend une partie filetée (10) pour entrer en prise avec un filetage correspondant sur l'isolateur (13).
  17. Ensemble comme revendiqué dans la revendication 13, dans lequel le changement axialement local de la section transversale comprend une ou plusieurs pattes agissant comme des arrêts à une ou aux deux extrémités de la partie du crapaud supportant le rail.
  18. Ensemble comme revendiqué dans la revendication 13, dans lequel le changement axialement local de la section transversale comprend un rétrécissement de la section transversale axiale qui est tel que l'isolateur (13) peut bouger librement autour de la partie rétrécie mais ne peut pas bouger au-delà, étant donné que le diamètre non rétréci du crapaud est plus grand que le passage (12') ou l'évidement (12) de l'isolateur (13).
  19. Isolateur (13, 13') pour isoler électriquement un crapaud (1, 2, 3) de rail de chemin de fer résilient d'un rail (300) de chemin de fer qui est retenu sur une partie (1) du crapaud (1, 2, 3) supportant le rail en service, caractérisé en ce que l'isolateur (13, 13') est configuré de manière à être maintenu en prise avec le crapaud (1, 2, 3) de manière à permettre le déplacement rotatif de l'isolateur (13, 13'), dans des conditions de fonctionnement normales, autour de l'axe longitudinal de ladite partie (1) supportant le rail, l'isolateur (13, 13') s'alignant automatiquement sur l'aile (301) du rail.
  20. Isolateur comme revendiqué dans la revendication 19, dans lequel l'isolateur (13) a une surface cylindrique supportant la charge.
  21. Isolateur comme revendiqué dans la revendication 19, dans lequel l'isolateur (13) a une surface hémi-cylindrique supportant la charge.
  22. Isolateur comme revendiqué dans la revendication 19, dans lequel l'isolateur (13, 13') a deux ou plusieurs surfaces (13a) supportant la charge, et en service l'isolateur (13, 13') peut être déplacé de manière rotative afin de changer celle des surfaces (13a) de l'isolateur supportant la charge qui est présentée à l'aile (301) du rail.
  23. Isolateur comme revendiqué dans la revendication 22, dans lequel l'épaisseur de matière entre les surfaces (13a) supportant la charge et une surface de l'isolateur (13, 13') qui entre en contact avec la partie (1) du crapaud (1, 2, 3) supportant le rail est amenée à varier entre des surfaces (13a) adjacentes supportant la charge de telle manière que l'isolateur (13, 13') puisse être mis en rotation afin d'ajuster la hauteur de la partie (1) supportant le rail au-dessus de l'aile (301) du rail.
  24. Isolateur comme revendiqué dans une quelconque des revendications 19 à 23, dans lequel l'isolateur (13, 13') est formé avec un évidement (12) longitudinal formé pour s'adapter sur la partie (1) du crapaud (1, 2, 3) supportant le rail.
  25. Isolateur comme revendiqué dans une quelconque des revendications 19 à 23, dans lequel l'isolateur (13) est formé avec un passage (12') en son sein pour recevoir la partie (1) du crapaud (1, 2, 3) supportant le rail.
  26. Isolateur comme revendiqué dans la revendication 24 ou 25, dans lequel l'évidement (12) ou le passage (12') est obturé à une extrémité.
  27. Crapaud (1, 2, 3) de fixation de rail de chemin de fer résilient ayant au moins une partie (1) de section transversale sensiblement circulaire qui, quand elle est en service, s'appuie sur une aile (301) d'un rail (300) de chemin de fer adjacent et s'étend de manière essentiellement parallèle à celle-ci, et sur laquelle un isolateur (13, 13') pour isoler électriquement le crapaud (1, 2, 3) du rail peut être retenu quand il est en service, caractérisé en ce que cette partie (8, 9, 10, 11) de ladite partie (1) du crapaud (1, 2, 3) supportant le rail coopère avec une partie dudit isolateur (13) de manière à limiter le déplacement longitudinal de l'isolateur (13) sur ladite partie (1) supportant le rail pendant la propulsion du crapaud (1, 2, 3) sur l'aile (301) du rail, tout en permettant son déplacement rotatif.
  28. Crapaud comme revendiqué dans la revendication 27, dans lequel la partie (1) du crapaud (1, 2, 3) de fixation du rail supportant le rail comprend un changement axialement local (8, 9, 10) ou déplacement transversal de la section transversale (11) qui est adapté pour entrer en prise avec un changement correspondant de la section transversale interne dudit isolateur (13).
  29. Crapaud comme revendiqué dans la revendication 28, dans lequel le changement axialement local (8, 9, 10) ou déplacement transversal de la section transversale (11) comprend un ou plusieurs évidements (8) ou rainures circonférentielles pour entrer en prise avec les projections correspondantes sur l'isolateur (13).
  30. Crapaud comme revendiqué dans la revendication 28, dans lequel le changement axialement local (8, 9, 10) ou déplacement transversal de la section transversale comprend un déport (11), un ou plusieurs pattes ou protubérances circonférentielles (9, 10) pour entrer en prise avec les évidements ou rainures correspondants sur la surface intérieure de l'isolateur (13).
  31. Crapaud comme revendiqué dans la revendication 28, dans lequel le changement axialement local de la section transversale comprend une partie filetée (10) pour entrer en prise avec un filetage correspondant sur l'isolateur (13).
  32. Crapaud comme revendiqué dans la revendication 28, dans lequel le changement axialement local de la section transversale comprend une ou plusieurs pattes agissant comme des arrêts à une ou aux deux extrémités de la partie du crapaud supportant le rail.
  33. Crapaud comme revendiqué dans la revendication 28, dans lequel le changement axialement local de la section transversale comprend un rétrécissement de la section transversale axiale qui est tel que l'isolateur (13) peut bouger librement autour de la partie rétrécie mais ne peut pas bouger au-delà, étant donné que le diamètre non rétréci du crapaud est plus grand que le passage (12') ou l'évidement (12) de l'isolateur (13).
  34. Crapaud comme revendiqué dans l'une quelconque des revendications 27 à 33, dans lequel ladite partie (1) de celui-ci supportant le rail est à une extrémité libre du crapaud.
  35. Crapaud comme revendiqué dans l'une quelconque des revendications 27 à 33, ayant deux parties supportant le rail aux extrémités libres respectives de celui-ci.
  36. Crapaud comme revendiqué dans l'une quelconque des revendications 27 à 33, dans lequel la partie de celui-ci supportant le rail est une partie entre d'autres parties du crapaud.
EP96909213A 1996-03-27 1996-03-27 Ensembles de fixation de rail de chemin de fer comprenant des crapauds de fixation de rail resilients, et isolateurs associes Expired - Lifetime EP0828891B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB1996/000739 WO1997036055A1 (fr) 1996-03-27 1996-03-27 Ensembles de fixation de rail de chemin de fer comprenant des crapauds de fixation de rail resilients, et isolateurs associes

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Publication Number Publication Date
EP0828891A1 EP0828891A1 (fr) 1998-03-18
EP0828891B1 true EP0828891B1 (fr) 2002-06-05

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2270299A1 (fr) 1998-10-14 2000-04-14 Jude Igwemezie Dispositif de retention de rail
GB2526967B (en) 2009-08-21 2016-03-09 Pandrol Ltd Railway rail fastening clip for use with an insulator
GB2472850B (en) 2009-08-21 2016-06-01 Pandrol Ltd Railway rail pad
PT2609255T (pt) * 2010-08-27 2017-01-02 Schwihag Ag Sistema de fixação de carril
DK3346054T3 (da) 2017-01-10 2022-01-31 Schwihag Ag Spændeklemme og skinnefastgørelsessystem til fastgørelse af jernbaneskinner

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GB1126697A (en) * 1966-11-07 1968-09-11 Lockspike Ltd A railway rail and fastening arrangement
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OA09065A (en) * 1987-10-19 1991-10-31 Pandrol Ltd Fastening railway rails.
DE3918091A1 (de) * 1989-06-02 1990-12-06 Vossloh Werke Gmbh Schienenbefestigung auf betonschwellen od. dgl. mittels elastischer spannklemmen
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WO1997036055A1 (fr) 1997-10-02
EP0828891A1 (fr) 1998-03-18

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