{
  "$type": "site.standard.document",
  "description": "The trailer has a draw-bar (1), an energy source (2), and a self-propelling drive. This is formed as friction wheel drives (5) for a trailer wheel (6) of a fixed axle on each trailer side. Both friction wheel drives move at the same or different speeds, so that the trailer can travel along various…",
  "path": "/patents/1089241",
  "publishedAt": "2004-03-03T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60P3/14",
    "NEUHAEUSER GMBH [DE]"
  ],
  "textContent": "The trailer has a draw-bar (1), an energy source (2), and a self-propelling drive. This is formed as friction wheel drives (5) for a trailer wheel (6) of a fixed axle on each trailer side. Both friction wheel drives move at the same or different speeds, so that the trailer can travel along various tracks. Each drive has a drive unit with drive roller having a friction surface, and a spring (9) supported relative to the chassis, which generates approximately constant contact pressure on the trailer wheel. The energy source is a generator, and the drive unit is an electric motor, especially rotary current motor.",
  "title": "Trailer with self drive device"
}