Pneumatic tire and tire mold
AssigneeToyo Tire & Rubber Co., Ltd.
InventorMasaaki Ohara
Life of this patent
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Abstract
A groove bottom of a circumferential groove formed in a tread surface is provided with a protruding stripe extending along a next ending direction of the circumferential groove. The protruding stripe is provided with a top head portion protruding toward a tire outer circumferential side, and a base portion which is narrower than the top head portion and connects the top head portion and the groove bottom. If a small stone is pinched, the top head portion is inclined around the base portion, and the protruding stripe is deflected as a whole, thereby generating a reaction force on the basis of a deformation restoring force.
Claims11
A pneumatic tire in which a tread surface is provided with a groove portion, and a land portion divided by the groove portion,
- wherein a protruding stripe extending along an extending direction of the groove portion is provided in a groove bottom of the groove portion, and
- wherein the protruding stripe is provided with a top head portion protruding toward a tire outer circumferential side, and a base portion being narrower than the top head portion and connecting the top head portion and the groove bottom.
A tire mold in which a groove portion forming frame for forming a groove portion of a tread surface is provided in a protruding manner in a forming surface portion forming a tread pattern of a pneumatic tire,
- wherein the groove portion forming frame is provided with a groove bottom forming portion forming a groove bottom of the groove portion, a groove wall forming portion forming a grove wall of the groove portion, and a protruding stripe forming portion provided in a concave manner in the groove bottom forming portion and forming a protruding stripe extending along an extending direction of the groove portion in the groove bottom, and
- wherein the protruding stripe forming portion has a first forming portion forming a top head portion of the protruding stripe, and a second forming portion provided in a leading end side of the groove portion forming frame so as to be narrower than the first forming portion, and forming a base portion of the protruding stripe.
Dependencies are inferred from the claim text.