{
  "$type": "site.standard.document",
  "description": "A multiple stage separation vortex flow air filter includes an air filter housing (AFH) having a central axis; a cylindrical helical plate located within the AFH proximate an upper shell bottom of the AFH; an air inlet eccentrically connected to the AFH to cause air flowing through the air inlet to…",
  "path": "/patents/1390708",
  "publishedAt": "2026-06-09T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02M35/0214",
    "VOLVO TRUCK CORPORATION"
  ],
  "textContent": "A multiple stage separation vortex flow air filter includes an air filter housing (AFH) having a central axis; a cylindrical helical plate located within the AFH proximate an upper shell bottom of the AFH; an air inlet eccentrically connected to the AFH to cause air flowing through the air inlet to create a vortex around the cylindrical helical plate; an perforated conical element in which the air flows through, the perforated conical element within the cylindrical helical plate around the central axis; an oblong conical casing that forms a conical passage and located along the central axis and partially within the perforated conical element, wherein air enters the conical passage through a whirling ring; and an air filter element within the oblong conical casing, wherein air flows through the air filter element and enters into an engine through an outlet pipe.",
  "title": "Multistage stage separation vortex flow air filter"
}