{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
      "$link": "bafkreieopgnctxc4o5jt2sk3b6hhqeikgsujwt6ehyeqeioyojsedkcwie"
    },
    "mimeType": "image/png",
    "size": 122961
  },
  "description": "The vehicle has two service brake circuits with compressed air vessel for the tractor unit, a parking brake circuit, and a trailer/semi-trailer brake circuit with compressed air vessel (31) in the tractor unit. This compressed air vessel is connected via a back pressure valve (32) to a…",
  "path": "/patents/1113325",
  "publishedAt": "2001-05-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60T15/48",
    "MAN NUTZFAHRZEUGE AG [DE]"
  ],
  "textContent": "The vehicle has two service brake circuits with compressed air vessel for the tractor unit, a parking brake circuit, and a trailer/semi-trailer brake circuit with compressed air vessel (31) in the tractor unit. This compressed air vessel is connected via a back pressure valve (32) to a multi-circuit protection valve (13), compressed air can fill the third air vessel, and this supplies compressed air for the trailer/semi-trailer brake circuit only, so that this is separate from the air consumption for the tractor unit parking brake system only.",
  "title": "Protective circuit for parking brake system for commercial vehicles with device for trailer or semi-trailer mode"
}