{
  "$type": "site.standard.document",
  "description": "An air treatment apparatus for an operator environment of an agricultural vehicle in which air to be filtered is drawn into an air filtration system, filtered and directed to an agricultural vehicle HVAC system. The air filtration system comprises first (34) and second (40) filtration devices…",
  "path": "/patents/1420892",
  "publishedAt": "2022-09-07T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60H1/00378",
    "AGCO INT GMBH [CH]"
  ],
  "textContent": "An air treatment apparatus for an operator environment of an agricultural vehicle in which air to be filtered is drawn into an air filtration system, filtered and directed to an agricultural vehicle HVAC system. The air filtration system comprises first (34) and second (40) filtration devices having respectively coarser and finer levels of filtration. Each filtration device (34, 40) is provided with a respective bypass (54, 56) permanently connected with an inlet end downstream of a valve mechanism (38) that selects between the filtration devices, and an outlet end upstream of the valve mechanism (38) and adjacent the respective filtration device (34, 40). In use a portion of an air flow downstream of the valve mechanism may be recirculated to purge the respective filtration device, and each bypass (54, 56) includes a respective non-return valve (54V, 56V) opposing transit of air from the outlet to the inlet ends.",
  "title": "AIR TREATMENT APPARATUS"
}