Rail fastening system

{
  "publication_number": "US11913177B2",
  "country": "US",
  "kind": "B2",
  "title": "Rail fastening system",
  "abstract": "Rail fastening system (1) for fastening a rail (2) to a rail subsurface, preferably for a ballastless track, comprising a base plate (10), preferably made of a plastic, and at least one dowel (20), wherein the base plate (10) has at least one opening (15), which completely penetrates the base plate (10) in the thickness direction, and the dowel (20) is introduced into the opening (15), is held therein by means of a retaining contour and projects in the thickness direction at least on one side beyond the base plate (10).",
  "claims": [
    "1. A rail fastening system (1) for fastening a rail (2) to a rail subsurface, comprising: a base plate (10); and at least one dowel (20), wherein the base plate (10) has at least one opening (15) which completely penetrates the base plate (10) in a thickness direction, wherein the at least one dowel (20) is introduced into the opening (15), is held in the opening (15) by a retaining contour, and projects in a thickness direction at least on one side beyond the base plate (10), wherein the base plate (10) has a mounting surface (11) for connecting one or more components for rail fastening and a bearing surface (14) opposite the mounting surface (11) in the thickness direction, wherein the opening (15) penetrates the mounting surface (11) and the bearing surface (14) and the dowel (20) projects beyond the base plate (10) on the side of the bearing surface (14), wherein, in order to realize the retaining contour, the opening (15) has an internal thread (16) and/or the dowel (20) has an external thread (23), which is configured in such a manner that the dowel (20) can be screwed into the opening (15) from a side of the mounting surface (11).",
    "2. The rail fastening system (1) according to claim 1, wherein the rail subsurface is a ballastless track.",
    "3. The rail fastening system (1) according to claim 1, wherein the base plate (10) is made of a plastic.",
    "4. The rail fastening system (1) according to claim 1, wherein the dowel (20) is introduced into the opening (15) from the side of the mounting surface (11).",
    "5. The rail fastening system (1) according to claim 1, wherein the mounting surface (11) comprises a rail support section (12) which is configured to support the rail (2) and/or one or more receptacles (13), which are configured to accommodate angle guide plates (4).",
    "6. The rail fastening system (1) according to claim 1, wherein the mounting surface (11) comprises an inclined rail support section (12) which is configured to support the rail (2) via a damping and/or springing intermediate layer (3).",
    "7. The rail fastening system (1) according to claim 1, wherein the bearing surface (14) has a ribbed structure.",
    "8. The rail fastening system (1) according to claim 1, wherein the dowel has the external thread, and wherein the external thread (23) has two sections of different thread characteristics.",
    "9. The rail fastening system (1) according to claim 1, wherein the dowel (20) has a dowel head (21), a diameter of which exceeds a smallest diameter of the opening (15).",
    "10. The rail fastening system (1) according to claim 1, wherein a tensioning screw (6) is screwed into the dowel (20).",
    "11. The rail fastening system (1) according to claim 10, wherein a tensioning clamp (5) is screwed by the tensioning screw (6) in such a manner that a retaining section of the tensioning clamp (5) presses on a rail foot (2 a) of the rail (2) in a springing elastic manner.",
    "12. The rail fastening system (1) according to claim 1, wherein the base plate (10) and the dowel (20) are at least partially anchored in a concrete bed (7) or are at least partially overmolded by concrete.",
    "13. The rail fastening system (1) according to claim 12, wherein the base plate (10) is seated in the concrete bed (7) 8 to 15 mm deep in the thickness direction, and/or wherein the dowel (20) extends 120 mm deep or deeper into the concrete bed (7).",
    "14. The rail fastening system (1) according to claim 1, wherein the base plate (10) has two openings (15) which completely penetrate the base plate (10) in the thickness direction, and wherein the rail fastening system (1) has two dowels (20) which are correspondingly introduced into the two openings (15), are held therein in each case by a retaining contour and project beyond the base plate (10) in the thickness direction.",
    "15. A method for producing a rail fastening system, comprising: providing the rail fastening system according to claim 1, wherein the dowel (20) is introduced into the opening (15) in such a manner that it is held therein by the retaining contour and projects in the thickness direction of the base plate (10) at least on one side beyond the base plate (10).",
    "16. The method according to claim 15, wherein the base plate (10) has a mounting surface (11) for connecting one or more components for rail fastening and a bearing surface (14) opposite the mounting surface (11) in the thickness direction, and wherein the dowel (20) is introduced into the opening (15) from the side of the mounting surface (11) in such a manner that it projects beyond the base plate (10) on the side of the bearing surface (14).",
    "17. The method according to claim 15, wherein the dowel (20) and/or the base plate (10) are not deformed when the dowel (20) is introduced into the opening (15).",
    "18. The method according to claim 15, wherein no deformation of the retaining contour does not take place when the dowel (20) is introduced and held in the opening (15), and wherein the dowel is embedded in concrete and can be removed or replaced without damaging the concrete."
  ],
  "description_excerpt": "The disclosure relates to a rail fastening system for fastening a rail to a rail subsurface, preferably for a ballastless track, which comprises a base plate with at least one opening and at least one dowel which is introduced into the opening. The disclosure also relates to a method for manufacturing a rail fastening system.\n\nBase plates are used to fasten a rail to a rail subsurface for a ballastless track. These can, for example, be designed as mounting plates, system frames or inclination plates.\n\nDE 20 2015 103 972 U1 so describes a mounting plate equipped with dowels for locking in a concrete bed and for mounting rail holding devices. The mounting plate has a bearing surface on the underside for connecting to a support structure. For the pre-mounting of a dowel (analogously several dowels) on the mounting plate, the dowel head is introduced from the side of the bearing surface into a corresponding opening in the mounting plate, and is held there by means of a spring-loaded retaining means. The rail fastening system that is thus pre-mounted is compacted by vibration into a concrete bed that is still fluid. After the concrete has set, a tensioning screw is introduced through the mounting plate into the dowel.\n\nAccording to the state of the art described above, the dowels are introduced into the base plate from below and locked in place. During pouring, the concrete generates a buoyancy force which acts from below on the base plate and pushes it upwards. At the same time, the dowels are held in place by the concrete, as they sit deep in the concrete as a result of their length.",
  "cpc": [
    "E01B 9/38",
    "E01B 2204/09",
    "E01B 9/14",
    "E01B 9/18",
    "E01B 9/28",
    "F16B 13/00",
    "F16B 2/065",
    "F16B 5/125"
  ],
  "ipc": [
    "E01B 9/18",
    "E01B 9/28",
    "E01B 9/38",
    "F16B 2/06"
  ],
  "assignees": [
    "Shiwihag Ag"
  ],
  "inventors": [
    "Stefan Lienhard",
    "Frank Meyer"
  ],
  "filing_date": "2019-01-08",
  "publication_date": "2024-02-27",
  "grant_date": "2024-02-27",
  "priority_date": "2018-01-11",
  "application_number": "US-201916960919-A",
  "family_id": "65013691",
  "cited_by_count": 0,
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}