Tokyo, Japan
Tokyo, Japan

The Bridgestone Corporation is a multinational auto and truck parts manufacturer founded in 1931 by Shojiro Ishibashi in the city of Kurume, Fukuoka, Japan. The name Bridgestone comes from a calque translation and transposition of ishibashi, meaning "stone bridge" in Japanese.Production facilities belonging to the Bridgestone Group number 141 in twenty-four countries, as of the end of 2005. Wikipedia.

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Metallic complexes having indenyl ligands can be used as an ingredient of a catalyst system. The catalyst system can be used in polymerizations of ethylenically unsaturated hydrocarbon monomers that include both olefins and polyenes. Embodiments of the catalyst system can provide interpolymers that include polyene mer and up to about 40 mole percent ethylene mer. The catalyst system also can be used in solution polymerizations conducted in C5-C12 alkanes.


Metallic complexes having indenyl ligands can be used as an ingredient of a catalyst system. The catalyst system can be used in polymerizations of ethylenically unsaturated hydrocarbon monomers that include both olefins and polyenes. Embodiments of the catalyst system can provide interpolymers that include polyene mer and from 40 to 75 mole percent ethylene mer, with a plurality of the ethylene mer being randomly distributed. The catalyst system also can be used in solution polymerizations conducted in C5-C12 alkanes, yielding interpolymers that include at least 10 mole percent ethylene mer.


Patent
Bridgestone | Date: 2017-05-17

In the present invention, block segment sections (55) and outer rib-shaped sections (75) are arranged in an outer shoulder land section (24). An end portion of one of vertical groove sections (51) in one of L-shaped groove sections (44), which is at the other side in the tire circumferential direction communicates with one of the horizontal groove sections (45) in another L-shaped groove section of the L-shaped groove sections (44), which is adjacent to the L-shaped groove section (44) in the tire circumferential direction, via one of second communicating sections (52). In addition, positions of first communicating sections (47) and the second communicating section (52) in the tire width direction are different from each other.


Patent
Bridgestone | Date: 2017-01-11

Various embodiments of a tire tread having at least one sipe comprising an S-shaped geometry are disclosed.


A loader device includes a support pedestal movable over a range of longitudinal travel along a longitudinal axis, a support carriage movably mounted to the support pedestal, a loader actuator, and a dismount actuator. The support carriage is movable over a range of vertical travel along a normal axis, which is perpendicular to the longitudinal axis. The support carriage has a support arm adapted to support a tire casing. The loader actuator and dismount actuator are respectively adapted to selectively move: (1) at least a portion of a tire casing supported upon the support carriage in a loading direction along the longitudinal axis off of the support arm onto the expandable rim hub and (2) at least a portion of a tire casing supported upon the expandable rim hub in an opposing unloading direction off of the expandable rim hub and onto the support arm of the loader device.


Patent
Bridgestone | Date: 2017-09-20

This disclosure is to provide a pneumatic tire capable of improving the WET braking performance, and simultaneously maintaining the silence at a high level. The pneumatic tire of this disclosure comprises on a tread surface one or more land portions sandwiched by a plurality of circumferential main grooves continuously extending in a tire circumferential direction, wherein at least one of the land portions is formed into a protruding shape such that its tire radial outline in a tire widthwise cross section protrudes to a tire radial outer side, the outline includes, in the tire widthwise cross section, at least a first arcuate surface having a radius of curvature of a tire widthwise center of the land portion, and second arcuate surfaces having radiuses of curvature smaller than the first arcuate surface and located on both tire widthwise edges of the land portion, sipes extending in the tire width direction are formed on the at least one of the land portions formed into the protruding shape, the sipes have chamfer portions on tread surface opening positions, and the chamfer portions have chamfer widths on at least one of both tire widthwise edges larger than chamfer widths on the tire widthwise center.


A pneumatic radial tire for a passenger vehicle including a carcass (2), which is composed of a ply of carcass cords radially arranged and toroidally provided between bead cores (1a) embedded in a pair of bead portions (1), and a pair of sidewall portions (5) connected to the bead portions, wherein when the tire is mounted on a rim and applied with internal pressure of at least 250 kPa, a tire cross-sectional width SW and a tire outer diameter OD satisfy a relational expression: OD>-0.0187xSW 2+9.15xSW-380, and a ratio Ts/Tb is 15% to 40%, the Ts representing a gauge of the sidewall portion in a tire maximum width portion and the Tb representing a bead width of the bead core in a tire radial direction center position.


Patent
Bridgestone | Date: 2017-09-13

The present invention provides a non-pneumatic tire which is provided with an attachment body (11) attached to an axle, a ring-shaped body (13) which surrounds the attachment body (11) from the outside in a tire radial direction, and a coupling member (15) which displaceably couples the attachment body (11) and the ring-shaped body (13), wherein the coupling member (15) is formed of a synthetic resin material and a reinforcing member is embedded in the coupling member (15).


A pneumatic radial tire for a passenger vehicle including a carcass (2), which is composed of a ply of carcass cords radially arranged and toroidally provided between a pair of bead portions, and a pair of sidewall portions (5) connected to the bead portions, wherein when the tire is mounted on a rim and applied with internal pressure of at least 250 kPa, a tire cross-sectional width SW and a tire outer diameter OD satisfy a relational expression: OD>-0.0187xSW 2+9.15xSW-380, and a ratio Ts/Tc is 5 to 10, the Ts representing a gauge of the sidewall portion in a tire maximum width portion and Tc representing a diameter of the carcass cords.


Patent
Bridgestone | Date: 2017-09-27

A tire frame member 17 configured from a resin material is formed with plural outer surface recesses 40 on a tire outer surface. The outer surface recesses 40 are disposed separated from each other, and are formed at least on an outer surface of a side portion 14.

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