Tire

Patent metadata

Field	Value
Publication number	US-9821612-B2
Application number	US-201314371340-A
Country	US
Kind code	B2
Filing date	Jan 8, 2013
Priority date	Jan 11, 2012
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

The present invention provides a tire including a side portion ( 104 ), a black rubber layer ( 113 ), a stain-preventing rubber layer ( 112 ) disposed adjacent to the black rubber layer, and a colored layer ( 111 ) disposed on the surface of the stain-preventing rubber layer and exposed on the outer surface of the side portion; a tire including a colored layer ( 207 ) disposed on the outer surface of the tire, and an underlayer rubber ( 208 ) disposed on the tire-interior side of the colored layer, wherein the colored layer is formed by curing a UV-curable paint; and a tire including a colored layer ( 302 ) on the surface of the side portion ( 301 ) of the tire, wherein the colored layer includes a marking ( 303 ).

First claim

The invention claimed is:

1. A tire comprising a tread for contacting with a road surface, and a side portion that extends continuously from the tread, wherein:
the side portion includes a black rubber layer containing an antioxidant, a stain-preventing rubber layer disposed adjacent to the black rubber layer, and a colored layer disposed on a surface of the stain-preventing rubber layer oriented outwardly in a tire width direction, the colored layer being exposed on an outer surface of the side portion;
the stain-preventing rubber layer has an outermost edge in a tire radial direction, which is located radially inwardly relative to a position where the tire has the maximum width;
the stain-preventing rubber layer comprises a rubber having air permeability lower than that of the black rubber layer;
the stain-preventing rubber layer contains an inorganic clay mineral;
the stain-preventing rubber layer and the black rubber layer include radially outer and inner boundary lines therebetween;
in a cross-section as seen in the tire width direction, each of the boundary lines is inclined with respect to a normal line to the outer surface of the side portion, the normal line extending from a point where the boundary line intersects with the outer surface of the side portion, such that an inner end of the boundary line in a tire axial direction extends in a direction toward, or away from a rotational axis of the tire;
the radially outer boundary line and the radially inner boundary line are inclined in opposite directions with respect to the rotational axis; and
in the cross-section as seen in the tire width direction, each of the boundary lines between the stain-preventing rubber layer and the black layer is inclined within an angular range of 10 to 60 degrees with respect to the normal line to the outer surface of the side portion extending from the point where the boundary line intersects with the outer surface of the side portion.

2. The tire according to claim 1 , wherein the stain-preventing rubber layer has a radially innermost edge, which is located at a radial position that is radially outwardly away from a bead toe by at least 20% a length of a cross-sectional height (SH) of the tire.

3. The tire according to claim 1 , wherein the colored layer has a minimum distance of at least 1 mm from the black rubber layer, with the stain-preventing rubber layer interposed therebetween.

4. The tire according to claim 1 , wherein, in the cross-section as seen in the tire width direction, the surface of the stain-preventing rubber layer oriented outwardly in the tire width direction has a length that is at least 5 mm and 40% or less the length of the cross-sectional height (SH) of the tire, the length being a distance between a radially outermost point and a radially innermost point of the stain-preventing rubber layer along the surface.

5. The tire according to claim 1 , wherein:
the stain-preventing rubber layer is at least partially shaped to define a recess depressed from the surrounding outer surfaces of the side portion in the tire width direction; and
the recess includes the colored layer therein to place the colored layer inside relative to the surrounding outer surface of the side portion in the tire width direction.

6. The tire according to claim 1 , wherein the stain-preventing rubber layer and ply cords of a carcass have a side rubber interposed therebetween.

Assignees

• Bridgestone Corp

Inventors

• Sakamoto Takashi
• Miura Takahiro
• Nakagawa Daisuke

Classifications

• B60C13/02

  Arrangement of grooves or ribs · CPC title

• B60C2013/007

  Thickness · CPC title

• B60C2013/005

  Physical properties of the sidewall rubber · CPC title

• B60C2013/045

  comprising different sidewall rubber layers · CPC title

• C08K5/005

  Stabilisers against oxidation, heat, light, ozone · CPC title