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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Patent
Bridgestone and Toyota Boshoku | Date: 2016-06-08

A molded foam member manufacturing method including: a first process of placing a foam molded first portion (11) (first molded body) and a rigid member (3) (rigid plate) in a second portion forming mold (20) (forming mold); and a second process of pouring a second portion-forming synthetic resin raw material (U) (foamable material) into the second portion forming mold (20) (forming mold) and foam molding a second portion (12) (second molded body) so as to surround a portion of the rigid member (3) (rigid plate) and form an integral unit with the first portion (11) (first molded body).


Patent
Bridgestone | Date: 2016-03-16

To provide a tire for a two-wheeled motor vehicle that is intended to suppress occurrence of uneven wear while improving a drainage property and a steering stability performance during high-speed running. Provided is a tire for a two-wheeled motor vehicle in which a rotation direction when mounted on a vehicle is designated. A center slant groove 1 in the vicinity of a tire equatorial plane of a tread surface that extends toward a reverse rotation direction of the designated rotation direction while slanting from a tire equatorial plane side to a tire width direction outer side is included, an angle of an extension direction thereof that is formed with respect to a tire circumference direction is within a range of 3 to 10, and at an end portion of the center slant groove in the reverse rotation direction, at least a tire width direction outer side groove edge of the center slant groove is formed into such a circular-arc-shaped portion as to have an angle of the tire width direction outer side groove edge that is formed with respect to the tire circumference direction, the angle increasing toward the reverse rotation direction, the angle of the tire width direction outer side groove edge of the center slant groove that is formed with respect to the tire circumference direction is larger than an angle of a tire width direction inner side groove edge of the center slant groove that is formed with respect to the tire circumference direction, and a groove depth of the center slant groove gradually decreases toward a groove edge of the center slant groove in the reverse rotation direction.


Patent
Bridgestone | Date: 2016-09-21

In a non-pneumatic tire, central portions in an extension direction of first elastic connecting plates (21) and central portions in an extension direction of second elastic connecting plates (22) are spaced from each other in a tire width direction (H) by a distance of 0.25 to 0.9 times an outer tube width (W1) serving as a size in the tire width direction (H) of an outer tubular body (13), edges of a first side in the tire width direction (H) of first end portions (21a) of the first elastic connecting plates (21) are disposed at the same positions in the tire width direction (H) as edges of the first side in the tire width direction (H) of the outer tubular body (13) or disposed inside in the tire width direction (H) of the edge of the first side in the tire width direction (H) of the outer tubular body (13) within a distance of 0.1 times the outer tube width (W1) or less, and edges of a second side in the tire width direction (H) of first end portions (22a) of the second elastic connecting plates (22) are disposed at the same positions in the tire width direction (H) as an edge of the second side in the tire width direction (H) of the outer tubular body (13) or disposed inside in the tire width direction (H) of the edge of the second side in the tire width direction (H) of the outer tubular body (13) within a distance of 0.1 times the outer tube width (W1) or less.


A golf ball trajectory prediction method that can predict the trajectory of a golf ball with high accuracy is provided. The golf ball trajectory prediction method includes: a swing measurement step of measuring a golfers swing using a test golf club; a head behavior prediction step of predicting a behavior of a head of a target golf club when using the target golf club, with a measurement value of the swing measured in the swing measurement step as input; a ball initial behavior calculation step of calculating an initial behavior of a golf ball after colliding with the head of the golf club, based on the behavior of the head predicted in the head behavior prediction step; and a ball trajectory prediction step of predicting a trajectory of the golf ball, from the initial behavior of the golf ball calculated in the ball initial behavior calculation step.


Patent
Bridgestone | Date: 2016-04-27

In a golf ball having a core, a cover and an intermediate layer therebetween, the ball and a sphere consisting of the core encased by the intermediate layer have surface hardnesses which satisfy a specific relationship, the intermediate layer and the cover have thicknesses which satisfy a specific relationship, and the core has a hardness profile in which the hardnesses at the core center, at positions 5 mm, 10 mm and 15 mm from the core center and at the core surface satisfy specific relationships. This ball, when played by mid- and high-level amateur golfers, achieves a good distance on driver shots, has a soft feel at impact and maintains the spin performance at a high level on approach shots.


Patent
Bridgestone | Date: 2016-04-26

The present invention relates to a method of manufacturing a wood type golf club head including a face portion, a crown portion, and a sole portion. The method includes a setting step of setting a surface roughness of the face portion and a step of forming the face portion based on the surface roughness set in the setting step. In the setting step, the larger a moment of inertia of the golf club head is, the larger the surface roughness outside an impact area of the face portion is set, and the smaller the moment of inertia is, the smaller the surface roughness outside the impact area of the face portion is set.


Patent
Bridgestone | Date: 2016-06-21

There is provided is a method and computer program product for selecting an appropriate golf ball for a subject by using a mobile computer device with a camera. The method includes: inputting information concerning hitting skill of the subject to the mobile computer device; performing a calibration of a distance and/or direction between two points in a screen of the mobile computer for shooting a moving image; shooting a moving image by the camera of the mobile computer device when the subject hits a golf ball by a golf club; determining a head speed of the golf club before an impact of the club and the ball from the shot moving image based on the calibration; computing a golf ball product having a suitable performance for the subject from the input information concerning hitting skill and the determined head speed, based on a database comprising data of information concerning hitting skills of players, data of head speeds before impact of club and ball, and data of performances of golf ball products which are correlated with each other; and displaying the computed recommended golf ball product on the mobile computer device.


Patent
Bridgestone | Date: 2016-06-21

A golf ball includes a plurality of dimples on the surface thereof and satisfies the following expression (1): PS_(7)/S/H1006.25 (mm^(1)) (1), wherein H is a deformation amount, which is expressed by a compressive deformation amount of the golf ball; S is a virtual plane area, which is a surface area of the golf ball determined supposing that no dimple exists on the surface of the golf ball; and PS_(7 )is a pressurized area, which is an area of the golf ball contacting a plane when a load of 6864 N is applied to the golf ball. The bottom of the dimple includes a center protruding portion with a curved shape protruding toward an outside of the golf ball.


Patent
Bridgestone | Date: 2016-05-24

In a golf ball having a core and a cover, the core is formed of a rubber composition, has center and surface portions which are unfoamed regions and has an intermediate portion containing a foamed region. The core is produced by charging the rubber composition, which contains a blowing agent, into a first curing mold and curing under given conditions, then removing the molded rubber material in a semi-cured state from the first mold, transferring the semi-cured material to a second curing mold and curing under given conditions. The foamed region of the core deforms by a certain degree at the time of impact, decreasing the radius of gyration of the ball and enabling a lower spin rate to be achieved. The decrease in resilience due to expansion of the molded material can be held to a minimum.


Patent
Bridgestone | Date: 2016-01-13

Apparatus and method for correcting the shape of a green tire configured so that, even if a side wall portion (S) is subjected to local crushing deformation during its temporary storage, such deformation is effectively corrected to easily improve the tire uniformity. A pressurized fluid is applied to an inner chamber of a green tire (G) having bead portions (B) held coaxially by upper and lower holders (56, 89), for setting the tread portion (T) of the green tire (G) coaxially to the bead portions (B). The side wall portions (S) is deformed outward and applied with an internal tension in the meridian direction, for correcting the shape of the green tire (G). Crushing deformation on the side wall portion (S) is thereby effectively recovered and corrected before vulcanization.

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