PNEUMATIC TIRE

To provide a pneumatic tire which can enhance draining on wet road surface.SOLUTION: A pneumatic tire includes one or more water absorption holes on a tread surface. The water absorption hole includes a smaller diameter part which positions in the tread surface side and a larger diameter part which...

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1. Verfasser: OSAWA YASUO
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a pneumatic tire which can enhance draining on wet road surface.SOLUTION: A pneumatic tire includes one or more water absorption holes on a tread surface. The water absorption hole includes a smaller diameter part which positions in the tread surface side and a larger diameter part which positions on hole bottom side and is larger than the smaller diameter part in a diameter. In reference condition the water absorption hole inclines and extends with respect to a normal direction of the tread surface. In the reference condition average cross-sectional area, which is cross-section area at cross section vertical to an extension direction of the smaller diameter part and is average value over extension length of the smaller diameter part, is 0.2-20 mm2 and the diameter of the larger diameter part is more than 1.4 times the diameter at cross section vertical to an extension direction of the smaller diameter part. In the reference condition an opening to the tread surface of the smaller diameter part and the larger diameter part overlap in transparent plan view viewing from the tread surface side.SELECTED DRAWING: Figure 2 【課題】本発明は、湿潤路面での排水性を向上させることのできる、空気入りタイヤを提供することを目的とする。【解決手段】本発明の空気入りタイヤは、トレッド踏面に、吸水孔を1つ以上有し、前記吸水孔は、前記トレッド踏面側に位置する細径部と、孔底側に位置する、径が前記細径部の径より大きい拡径部と、を有し、基準状態において、前記吸水孔は、前記トレッド踏面の法線方向に対して傾斜して延びており、前記基準状態において、前記細径部の該細径部の延在方向に垂直な断面での断面積の、前記細径部の延在長さにわたる平均値である平均断面積は、0.2〜20mm2であり、且つ、前記拡径部の径は、前記細径部の該細径部の延在方向に垂直な断面での径の1.4倍以上であり、前記基準状態における、前記トレッド踏面側から見た透過平面視において、前記細径部の前記トレッド踏面への開口部と前記拡径部とが、重なっている。【選択図】図2