{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "The invention relates to non-track-bound, electrically or hybrid-electrically driven vehicles including a current collector supplying traction energy from a two-pole, electrical overhead line system. The current collector has an erectable supporting frame with a fixed end articulated on a vehicle…",
  "path": "/patents/1434783",
  "publishedAt": "2026-07-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L5/36",
    "Siemens Mobility GmbH"
  ],
  "textContent": "The invention relates to non-track-bound, electrically or hybrid-electrically driven vehicles including a current collector supplying traction energy from a two-pole, electrical overhead line system. The current collector has an erectable supporting frame with a fixed end articulated on a vehicle chassis and a free end articulated to a rocker support. For each contact pole, a rocker with contact strips is resiliently mounted on the rocker support by a spring assembly. A restoring force of the spring assembly has a constant spring characteristic along its compression travel. The spring assembly compression travel includes, successively, a first spring travel with restoring force increasing with a first spring constant, a second spring travel with restoring force remaining constant, and a third spring travel with restoring force rising with a second spring constant greater than the first spring constant, resulting in high contact quality with varying overhead wire heights.",
  "title": "NON-TRACK-BOUND VEHICLE HAVING A CURRENT COLLECTOR"
}