{
  "$type": "site.standard.document",
  "description": "It is an object of the present invention to improve the running performance on snowy and icy roads, and for this purpose, blocks provided with sipes are formed at a tread portion. The sipes (9A,9B) include an open top (Up) end that opens at a block surface (7S) and a bottom (Bo), and a…",
  "path": "/patents/1075962",
  "publishedAt": "2005-07-13T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/11",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "It is an object of the present invention to improve the running performance on snowy and icy roads, and for this purpose, blocks provided with sipes are formed at a tread portion. The sipes (9A,9B) include an open top (Up) end that opens at a block surface (7S) and a bottom (Bo), and a configuration of the sipes (9A,9B) in a plane parallel with the block surface (7S) comprises a zigzag part (9a) extending in the length direction of the sipes. The zigzag part (9a) displaces upon turning back to one side and to the other side in a length direction of the sipes in the course from the open top end (Up) to the bottom (Bo). At least one block includes a first sipe (9A) and a second sipe (9B) which depths (d) of the turn-back points (11a,11b) of displacement from the open top end and/or positions of the turn-back points of displacement in the length direction differ from each other.",
  "title": "Pneumatic tire"
}