{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
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  "description": "The present invention relates to a piston ring with a trapezoidal opening, used for being sleeved on a piston ring groove of a piston and comprising a piston ring main body with an opening, wherein the piston ring main body is processed with at least one trapezoidal boss at an end of one side of…",
  "path": "/patents/1386287",
  "publishedAt": "2026-04-15T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02F5/00",
    "MAHLE AUTOMOTIVE TECH CHINA CO LTD [CN]"
  ],
  "textContent": "The present invention relates to a piston ring with a trapezoidal opening, used for being sleeved on a piston ring groove of a piston and comprising a piston ring main body with an opening, wherein the piston ring main body is processed with at least one trapezoidal boss at an end of one side of the opening, and is processed with at least one groove matched with the trapezoidal boss at an end of the other side of the opening; a height of the boss is not greater than a depth of the groove; and the piston ring has different thicknesses on two sides of the opening, so that only one side surface of the trapezoidal boss is in contact with a corresponding side surface of the groove in the operation process of an engine.",
  "title": "PISTON RING WITH TRAPEZOIDAL OPENNING"
}