{
  "$type": "site.standard.document",
  "description": "The invention relates to an air suspension device for raising and lowering the vehicle body of air-suspended vehicles with level control, comprising at least one level control valve unit (1), air suspension bellows (2a, 2b) assigned to at least one vehicle axle, which can be supplied by a…",
  "path": "/patents/954919",
  "publishedAt": "2015-12-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60G17/0523",
    "KNORR BREMSE SYSTEME FUER NUTZFAHRZEUGE GMBH [DE]"
  ],
  "textContent": "The invention relates to an air suspension device for raising and lowering the vehicle body of air-suspended vehicles with level control, comprising at least one level control valve unit (1), air suspension bellows (2a, 2b) assigned to at least one vehicle axle, which can be supplied by a compressed air reservoir (11) connected thereto indirectly via pneumatic lines, as well as a control valve device (3) for manual level adjustment of the vehicle body in accordance with a manual control unit (8) bypassing the level control valve unit (1), comprising a manual actuation element (9) and a valve unit (15), wherein the control valve device (3) has at least one check valve (5a) for pressurizing and depressurizing the air suspension bellows (2a, 2b) via the level control valve unit (1), at least one pressurizing valve (6a) and at least one depressurizing valve (7a) for pressurizing and depressurizing the air suspension bellows (2a, 2b) bypassing the level control valve unit (1). According to the invention, the manual control unit (8) controls the at least one check valve (5a), the at least one pressurizing valve (6a) and the at least one depressurizing valve (7a) by a position of the manual actuation element (9) via respectively associated pneumatic lines (10a, 10b, 10c) to pneumatically initiate one of four operating states of the air suspension device.",
  "title": "PNEUMATIC SUSPENSION UNIT FOR LIFTING AND LOWERING A VEHICLE STRUCTURE"
}