{
  "$type": "site.standard.document",
  "description": "A pneumatic tire is provided with a pair of circumferential grooves (3) arranged in both sides of a tire equator (C), and a plurality of oblique grooves (4) having a steep decline portion (4a) extending to an outer side in a tire axial direction at an angle (¸1) between 15 and 45 degree with…",
  "path": "/patents/1066960",
  "publishedAt": "2006-05-31T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/0302",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A pneumatic tire is provided with a pair of circumferential grooves (3) arranged in both sides of a tire equator (C), and a plurality of oblique grooves (4) having a steep decline portion (4a) extending to an outer side in a tire axial direction at an angle (¸1) between 15 and 45 degree with respect to a tire circumferential direction from a position near the circumferential groove (3), in a tread surface (2). A land portion (B) surrounded by the circumferential groove (3) and the steep decline portion (4a) has an acute corner portion (12) and an obtuse corner portion (13), each being formed between the circumferential groove (3) and the steep decline portion (4a) . An outer groove wall surface (6) of the circumferential groove (3) includes a gentle decline wall (6a) in the tread surface side, and a steep decline wall (6b) in the groove bottom side. Further, an inner end (6L2) in the tire radial direction of the gentle decline wall (6a) is formed in a wavy shape in which an inclined surface width (K) corresponding to a distance in the tire axial direction from the inner end (6L2) to a nodal line (6L1) where the gentle decline wall (6a) intersects the tread surface (2) repeats increasing and decreasing in the tire circumferential direction. An innermost point (Pt) of the inner end (6L2) at which the inclined surface width (K) becomes maximum is positioned in a region (J) between an intermediate position between a leading end (12a) of the acute corner portion (12) and a leading end (13a) of the obtuse corner portion (13), and the leading end (12a) of the acute corner portion (12).",
  "title": "Pneumatic tire"
}