{
  "$type": "site.standard.document",
  "description": "The flap valve comprises a housing (1) with a rotatably installed shut-off flap (5) which is connected to an operating element located outside the housing via a rotation transmission component guided through an opening in one wall of the housing. A seal is provided for the sealing of the inside of…",
  "path": "/patents/1081004",
  "publishedAt": "2005-01-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N1/166",
    "BOYSEN FRIEDRICH GMBH CO KG [DE]"
  ],
  "textContent": "The flap valve comprises a housing (1) with a rotatably installed shut-off flap (5) which is connected to an operating element located outside the housing via a rotation transmission component guided through an opening in one wall of the housing. A seal is provided for the sealing of the inside of the housing and by especially a spring is pressed against the housing and/or against the rotation transmission component. Means are also provided by which the seal during rotation of the shut-off flap is at least partially rotated along with it.",
  "title": "Butterfly valve"
}