{
  "$type": "site.standard.document",
  "description": "The control element has a sealing gap defined between stationary and movable cylindrical guide surfaces (4,8) of a valve needle guide (2) and a valve housing, the movable guide surface provided with a surface structure, e.g. parallel peripheral grooves or a flat thread extending over the full…",
  "path": "/patents/1108422",
  "publishedAt": "2001-11-21T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02M61/12",
    "SIEMENS AG [DE]"
  ],
  "textContent": "The control element has a sealing gap defined between stationary and movable cylindrical guide surfaces (4,8) of a valve needle guide (2) and a valve housing, the movable guide surface provided with a surface structure, e.g. parallel peripheral grooves or a flat thread extending over the full length of the guide surface. A carbon coating can be applied to the surface structure.",
  "title": "Guiding device for high pressure hydraulic systems"
}