{
  "$type": "site.standard.document",
  "description": "A pneumatic tire includes, on a tread surface, circumferential main grooves extending in a tread circumferential direction, and land portions defined between circumferential main grooves adjacent in a tread width direction among the circumferential main grooves, or by a circumferential main groove…",
  "path": "/patents/1322771",
  "publishedAt": "2022-07-21T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/1218",
    "BRIDGESTONE CORPORATION"
  ],
  "textContent": "A pneumatic tire includes, on a tread surface, circumferential main grooves extending in a tread circumferential direction, and land portions defined between circumferential main grooves adjacent in a tread width direction among the circumferential main grooves, or by a circumferential main groove and a tread edge. The land portions include widthwise grooves (and/or widthwise sipes), extending in the tread width direction, each including a gradually decreasing groove (sipe) width portion in which a groove (sipe) width gradually decreases from the tread surface towards an inner side in the tire radial direction, a constant groove (sipe) width portion that extends from the gradually decreasing groove (sipe) width portion towards the inner side in the tire radial direction and has a constant groove (sipe) width, and a branched groove (sipe) portion branching and extending from the constant groove (sipe) width portion towards the inner side in the tire radial direction.",
  "title": "PNEUMATIC TIRE"
}