{
  "$type": "site.standard.document",
  "description": "A pneumatic tire having, on a tread surface, polygonal blocks closely and densely arranged and capable of reducing noise in a high dimension is provided. On the tread surface, land portions are defined by a pair of circumferential main grooves extending in a zig-zag manner along a tire equator on…",
  "path": "/patents/967035",
  "publishedAt": "2014-11-26T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/04",
    "BRIDGESTONE CORP [JP]"
  ],
  "textContent": "A pneumatic tire having, on a tread surface, polygonal blocks closely and densely arranged and capable of reducing noise in a high dimension is provided. On the tread surface, land portions are defined by a pair of circumferential main grooves extending in a zig-zag manner along a tire equator on lateral sides thereof and divided, by at least four circumferential narrow grooves 3 extending in the zig-zag manner along the tire equator and multiple lateral grooves 4 communicating between the circumferential main groove and the circumferential narrow groove or between the circumferential narrow grooves, into at least five block rows L each of which including polygonal blocks with at least five corners arranged in a tire circumferential direction, wherein a block arrangement having the polygonal blocks 5 arranged in a line-symmetric manner with respect to the tire equator as an axis of symmetry includes side regions R 1 , R 2 facing each other across the tire equator C and displaced from each other in the tire circumferential direction by a phase difference of 0.2 to 0.4 times of a repetition pitch of a pattern of the block row.",
  "title": "PNEUMATIC TIRE"
}