{
  "$type": "site.standard.document",
  "description": "A cylinder portion 1 configured such that a recess (depression) 14 is formed on an upper edge portion of an inner wall of the cylinder portion to prevent the formation of choke between the inner wall and a side edge 26 of a valve umbrella 22 of an exhaust valve 2, the recess being formed by…",
  "path": "/patents/996557",
  "publishedAt": "2012-10-31T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01L1/46",
    "KAWASAKI HEAVY IND LTD [JP]"
  ],
  "textContent": "A cylinder portion 1 configured such that a recess (depression) 14 is formed on an upper edge portion of an inner wall of the cylinder portion to prevent the formation of choke between the inner wall and a side edge 26 of a valve umbrella 22 of an exhaust valve 2, the recess being formed by depressing the inner wall, and the exhaust valve configured such that a cross section of a head portion 26 of the valve umbrella 22 tapers from an outer peripheral edge 25 of the valve umbrella 22 toward a top of the valve umbrella 22 are included.",
  "title": "FOUR-STROKE INTERNAL COMBUSTION ENGINE AND EXHAUST VALVE"
}