{
  "$type": "site.standard.document",
  "description": "The present invention relates to Flap Valve Assembly (1) for controlling the flow of air along a passage (4) comprising a spindle (2), which is rotatable about its axis, extending across the passage (4) and a flap valve (3) secured to the spindle (2) inside the passage (4) such that rotation of the…",
  "path": "/patents/1081363",
  "publishedAt": "2004-12-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D9/1005",
    "DELPJI TECHNOLOGIES INC [US]"
  ],
  "textContent": "The present invention relates to Flap Valve Assembly (1) for controlling the flow of air along a passage (4) comprising a spindle (2), which is rotatable about its axis, extending across the passage (4) and a flap valve (3) secured to the spindle (2) inside the passage (4) such that rotation of the spindle (2) causes the flap valve to pivot about the spindle (2) axis, wherein the flap valve (3) is moveable between a position in which the passage (4) is substantially fully closed and a position wherein the passage (4) is substantially fully open characterised in that, the flap valve (3) comprises a lamination of a support layer (3a, 3b) and an elastomeric layer (3c), the outer diameter (D3) of the support layer (3a, 3b) being smaller than the inner diameter (D2) of the passage (4) and the outer diameter (D1) of the elastomeric layer (3c) being greater than the outer diameter (D2) of the passage (4).",
  "title": "Flap valve assembly"
}