{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
      "$link": "bafkreife7diintveue2shzfttionzpxyw5kf4tg23la2npromrz5qyamha"
    },
    "mimeType": "image/png",
    "size": 84392
  },
  "description": "A heavy-duty pneumatic tire having block land portions in a tread surface can reduce the tire circumferential shearing strain and heat generation in the tread portion to prevent the separation failure between the tread rubber and the belt more effectively. A heavy-duty pneumatic tire has, in a…",
  "path": "/patents/934637",
  "publishedAt": "2016-11-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/0311",
    "BRIDGESTONE CORP [JP]"
  ],
  "textContent": "A heavy-duty pneumatic tire having block land portions in a tread surface can reduce the tire circumferential shearing strain and heat generation in the tread portion to prevent the separation failure between the tread rubber and the belt more effectively. A heavy-duty pneumatic tire has, in a tread surface, blocks defined by a plurality of circumferential main grooves each continuously extending in a tire circumferential direction and a plurality of transverse grooves each communicating between circumferential main grooves adjacent in a tire width direction, wherein in a tire widthwise area that centers on a tire equator and whose width in the tire width direction is 50% of a tread width: at least one of the blocks has a block partitioning groove that is open to each of transverse grooves defining the block and is shallower than the circumferential main grooves, to divide the block into a plurality of small blocks; and at least one of the small blocks has a block auxiliary groove that is open to the block partitioning groove at one end and open to a corresponding circumferential main groove or transverse groove at an other end and is shallower than the circumferential main grooves.",
  "title": "HEAVY DUTY PNEUMATIC TIRE"
}