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Pneumatic tire for motorcycle

Patent Number: 8464770
Publication Date: 2013-06-18
Inventor:

The tread portion 2 is divided in the tire widthwise direction into five regions comprising the center tread region A, respective shoulder tread regions C, and respective intermediate tread regions B. A curved length in the tire widthwise direction of a tread surface of the center tread region A is in the range of 10 to 35% of the curved length in the tire widthwise direction of the entire tread surface, and the whole curved length in the tire widthwise direction of a tread surface ...

Pneumatic tire

Patent Number: 8464769
Publication Date: 2013-06-18
Inventor:

A proper balance between ride comfort, steering stability, and road noise is achieved. A pneumatic tire (1) has a band layer (9) comprising a band ply (9A) where band cords are arranged at an angle of not more than 5 deg. with respect to the circumferential direction of the tire on the radially outer side of a belt layer (7). The band ply (9A) comprises a first ply piece (9a) covering only one side of end portions of the belt layer (7) ...

Pneumatic tire

Patent Number: 8459322
Publication Date: 2013-06-11
Inventors: ; ; ; ; ;

A pneumatic radial tire has a chipper in place of a traditional apex, the chipper located between a carcass main portion and turnup portion. The chipper layer may be composed of a chopped carbon fiber and aramid composite reinforced elastomeric layer. The tire sidewalls have a radial height SH and a section width SW located within a range of 0.4 to 0.44 of the sidewall radial height SH measured from the bead core. The section width SW may further be located within a range of 0.1″ to ...

Tread for tire including gum blocks with notches

Patent Number: 8459321
Publication Date: 2013-06-11
Inventors: ; ;

Tread for a tire provided with a running surface intended to come into contact with the roadway when running, this tread comprising a plurality of blocks of mean axis XX′ intersecting the running surface of the tread, each block, including a side wall that makes a full circuit of the block about the axis XX′. This side wall intersects the running surface at an edge with a closed geometric outline, this edge delimiting a contact surface via which the block makes contact with the roadway. ...

Pneumatic tire with tread having chamfered surface

Patent Number: 8459320
Publication Date: 2013-06-11
Inventor:

A pneumatic tire comprises grooves 1 to 3 formed in a tread and land portions 4 each having an acute angle portion 5 formed by the grooves 2 and 3. The acute angle portion 5 is chamfered by a plurality of chamfered surfaces 11 and 12 to form into a step shape by the chamfered surfaces 11 and 12 and a connecting surface 21 that connects the adjacent chamfered surfaces 11 and 12. Furthermore, ...

Tire with rubber tread containing combination of resin blend and functionalized elastomer

Patent Number: 8459319
Publication Date: 2013-06-11
Inventors: ; ;

This invention relates to a pneumatic tire with an outer, running surface containing, circumferential tread comprised of a styrene/butadiene (SBR) rich rubber composition containing two SBR's with spaced apart glass transition temperatures (Tg's), one of which is a functionalized SBR with a functional group reactive with hydroxyl groups on a precipitated silica, together with a combination of at least three resins with spaced apart softening points. The filler reinforcement is a combination ...

Pneumatic tire having an innerliner of a rubber composition comprised of diene based elastomer and resin

Patent Number: 8453694
Publication Date: 2013-06-04
Inventor:

The present invention relates to a pneumatic rubber tire having an integral innerliner of a rubber composition comprised of a combination of cis 1,4-polyisoprene rubber and medium to high vinyl styrene/butadiene rubber together with compatible ...

Pneumatic tire

Patent Number: 8453693
Publication Date: 2013-06-04
Inventors: ; ; ; ; ;

A pneumatic radial tire having a circumferentially extending equatorial plane of the tire, the tire comprising a carcass, a tread radially outward of the carcass, the carcass comprising at least one carcass reinforcing ply, opposing bead portions, and opposing sidewalls, the carcass reinforcing ply having a main portion extending between the opposing bead portions and a pair of turnup portions, each turnup portion extending from one end of the main portion, each bead portion having a bead ...

Vehicle rim comprising a central valve

Patent Number: 8453692
Publication Date: 2013-06-04
Inventor:

The invention relates to a vehicle wheel, preferably a light alloy wheel, in which the compressed-air non-return valve is positioned axially in a valve unit (3a) in the center of the wheel hub (1), the pressure medium, air or other gases, being supplied either manually from the exterior via the valve (2a) or automatically from the vehicle side via the valve (2b) of the axial bore (9a). The pressure medium reaches the wheel base ...

High efficiency heavy duty automotive wheel

Patent Number: 8453691
Publication Date: 2013-06-04
Inventor:

An automotive wheel used to substantially reduce energy loss due to tire flex and energy loss from a conventional drive train. The wheel includes a wheel hub, two sidewalls, an inner low pressure pneumatic chamber with hub protector, and an outer tread ring with inner tread wall and semi-rigid outer tread, containing an elastic band. The hub can contain an electric hub motor. The pneumatic chamber and a porous restraint band position the outer tread ring and enable the wheel to simulate an ...

Tire chain tightening apparatus and method

Patent Number: 8453690
Publication Date: 2013-06-04
Inventor:

A tire chain tightener for use on automotive, truck, or other vehicle traction chains and similar devices. The tire chain tightener has an length of elastic material with a hook attached to each end. Intermediate hooks are spaced along the elastic material between the two ends. One of the ends may be uniquely marked with instructions for correct installation of the tire chain tightener. When correctly installed, a tire chain tightener with N+1 hooks will form a symmetrical N pointed star ...

Tire vulcanizing die and pneumatic tire

Patent Number: 8453689
Publication Date: 2013-06-04
Inventor:

An object of the present invention is to provide a pneumatic tire, in which a light is prevented from occurring on a wear indicator itself, edge portions and surfaces of a land portion located in the vicinity of the wear indicator, as well as a tire vulcanizing die therefor. In order to achieve the object, the main groove of the pneumatic tire includes on a groove bottom a wear indicator protruding by a predetermined height and in wall portions of the main groove located at both sides of ...

Tire with component containing polybenzobisoxazole short fiber and epoxidized polyisoprene

Patent Number: 8448684
Publication Date: 2013-05-28
Inventors: ; ; ; ;

The present invention is directed to a pneumatic tire comprising at least one component selected from the group consisting of apexes, flippers and chippers, the at least one component comprising a rubber composition, the rubber composition comprising a diene based elastomer and from 1 to 30 parts by weight, per 100 parts by weight of elastomer (phr), of a polybenzobisoxazole (PBO) short fiber having a length ranging from 0.5 to 20 mm having a thickness ranging from 10 to 30 microns, and ...

Heavy duty pneumatic tire

Patent Number: 8448683
Publication Date: 2013-05-28
Inventor:

A heavy duty pneumatic tire comprises a carcass ply of steel cords turned up around a bead core in each bead portion so as to form a pair of turned up portions and a main portion therebetween. The steel cords of the carcass ply are rubberized with a topping rubber having a hardness Ht1 of from 68 to 90 degrees. The bead core is composed of: a bead core main made of windings of a steel wire; a rubber coating penetrating into the bead core main and having a hardness Hb of from 78 to 90 ...

Tire for heavy vehicles

Patent Number: 8448682
Publication Date: 2013-05-28
Inventors: ;

A tire comprising at least two working layers and at least one layer of circumferential reinforcing elements positioned radially between two working crown layers. At least one layer of circumferential reinforcing elements has an axial width greater than 0.5×S, and is made up of two parts separated axially from one another, and, axially between the two parts of the layer of circumferential reinforcing elements, two working crown layers are coupled over an axial width greater than ...

Pneumatic tire

Patent Number: 8448681
Publication Date: 2013-05-28
Inventors: ;

A pneumatic tire 1 according to the present invention includes a plurality of turbulence generation ridges 13 which extend on a surface of a tire side portion 7 in a tire-radial direction and which are arranged at a pitch in a tire-circumferential direction. A protrusion 15 rising from the surface 7a of the tire side portion 7 is formed in the tire side portion 7. Either an inner end portion 13A of the turbulence generation ...

Tyre provided with an expelled-water deflector device

Patent Number: 8448680
Publication Date: 2013-05-28
Inventors: ;

Tire having a tread, sidewalls axially and radially extending towards the inside of the tread, the tread having a running surface, intended to be in contact with the ground during running, and axially lateral faces on either side of the tread, this tire having, furthermore, at least on one of the sidewalls and near the tread, a circumferential rib intended to modify the height of expelled water in the transverse direction (corresponding to a direction parallel to the rotation axis of the ...