Bridgestone Corporation

Shungo Fujita

Yukihiro Kiwaki

Takamitsu Nakamura

Sotaro Iwabuchi

Takaaki Kojima

Kohei Sahashi

Shintaro Hayashi

Kensuke Dobashi

Paula R Lundgren

David E Schultz

Jon Irvin Stuckey

Zachary A Sterba

Atsushi Miyasaka

Yoshitaka Tanaka

Mayuko Karasawa

Tatsuya Tomida

Shingo Oono

Keigo Saito

Kenjiro Yamaya

Hitoshi Yasui

Kai Yamada

Shu Nagai

Soutarou Iwabuchi

Takayuki Fukunaga

Kentaro Yoshizawa

Toshiyuki Ishiguro

Tire tread

A hydraulic actuator includes a tube capable of being expanded and contracted by fluid pressure, a sleeve covering the tube, a pair of sealing members that seal both ends of the tube in an axial direction thereof, and plural inner pieces aligned inside the tube so as to be adjacent to each other. The plural inner pieces include a restraint side where adjacent inner pieces are in contact with each other in the tube whose inside is not pressurized by the fluid pressure and a swing side where a gap is made at an opposed position to the restraint side to allow the adjacent inner pieces to swing with respect to each other. The plural inner pieces further include a restraint mechanism that keeps the adjacent inner pieces in contact with each other on the restraint side in the tube whose inside is pressurized by the fluid pressure.

Hydraulic actuator

A pneumatic tire including a center block rowprovided in a center area of a tread surface, wherein the center block row includes a plurality of center blocksarranged along a tire circumferential direction, the plurality of center blocks includes a plurality of first center blocksand a plurality of second center blocks, the plurality of first center blocks and the plurality of second center blocks have polygonal shapes on the tread surface, the polygonal shape formed by each second center block has a same number of sides as, but a different shape than, the polygonal shape formed by each first center block, each first center block and each second center block has one or more sipes, and a number n of sipes included in each second center block is greater than a number m of sipes included in each first center block.

Pneumatic tire

The object is to improve the durability of fluid pressure actuators. The holding member with actuator cover according to this disclosure comprises: a holding section to be attached to a fluid pressure actuator driven by fluid pressure to hold an object; and an actuator cover that covers the fluid pressure actuator while the holding section is attached to the fluid pressure actuator.

Holding member with actuator cover and actuator cover

A first lateral groove and a second lateral groove are formed in a pneumatic tire. A first inclined portion is formed on one side of the first lateral groove in the tire circumferential direction, and a second inclined portion is formed on the other side of the second lateral groove in the tire circumferential direction. The first inclined portion is inclined from tire radial direction outside to tire radial direction inside by chamfering the end of one side circumferential block in the tire circumferential direction. The second inclined portion is inclined from tire radial direction outside to tire radial direction inside by chamfering the end of the other side circumferential block in the tire circumferential direction. The first inclined portion crosses the circumferential block and communicates with the circumferential groove. One end portion of the second inclined portion in the tire width direction terminates in the circumferential direction block.

Tire

In a tire, a plurality of outer resonators () are formed in an outer land portion () partitioned by two outer main grooves () and arranged in a tire circumferential direction, a plurality of inner resonators () are formed in an inner land portion () partitioned by two inner main grooves () and arranged in the tire circumferential direction, the outer resonator includes a first vertical groove () which extend in the tire circumferential direction, and a first branch groove () and a second branch groove () which have an inner volume smaller than that of the first vertical groove, extend in the tire width direction from both end portions of the first vertical groove in the tire circumferential direction such that the first branch groove and the second branch groove extend in directions opposite to each other, and are respectively opened to the two outer main grooves, and the inner resonator includes a second vertical groove () which extends in the tire circumferential direction, and a third branch groove () and a fourth branch groove () which have an inner volume smaller than that of the second vertical groove, extend in the tire width direction from the second vertical groove such that the third branch groove and the fourth branch groove extend in directions opposite to each other, and are respectively opened to the two inner main grooves.

Tread portion of an automobile tire

A pneumatic tire comprises: a first blocklocated on a tire equatorial plane and having a recessthat inclines with respect to a tire width direction; and a second blocklocated to face the recess of the first block.

A pneumatic tire comprising on a tread surfacea plurality of blocks, wherein: the blocks have an inclined grooveformed thereon; the inclined groove has a connecting portionconnected to the circumferential main grooves, a wide-width portionconnected to the connecting portion, and a narrow-width portionconnected to the wide-width portion; the wide-width portion and the narrow-width portion have inclination angles with respect to the tire circumferential direction smaller than the connecting portion; the blocks have a sipeformed thereon, the sipe having one end opening to the connecting portion and the other end opening to the circumferential main grooves; and the sipe has a bent portion.

Growing community of inventors

Tokyo, Japan

Shungo Fujita