{
  "$type": "site.standard.document",
  "description": "The system (1) has a level control valve unit (4) and a manually actuatable lifting and lowering valve unit (5) interposed in pneumatic series connection between pressurized air sources (2) i.e. container (3), and pneumatic spring bellows (6a, 6b). The lifting lowering valve unit is switched back…",
  "path": "/patents/994290",
  "publishedAt": "2013-01-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60G17/0525",
    "HALDEX BRAKE PROD GMBH [DE]"
  ],
  "textContent": "The system (1) has a level control valve unit (4) and a manually actuatable lifting and lowering valve unit (5) interposed in pneumatic series connection between pressurized air sources (2) i.e. container (3), and pneumatic spring bellows (6a, 6b). The lifting lowering valve unit is switched back and forth between a passage position and a locking position during driving operation. A level of the bellows is changed in the passage position, and remains unchanged in the locking position, and the level control valve unit has an electrically controllable 2/2-way valve (11).",
  "title": "Pneumatic spring assembly"
}