Patents Assigned to Bridgestone Corporation
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Publication number: 20230114431Abstract: A functional component capable of stably detecting information indicative of a usage state of a tire, including an electronic component capable of acquiring information on a tire is housed and which is attachable to an inner circumferential surface of the tire; a housing having a housing part in which the electronic component is housed and a bottom surface to be opposed to the inner circumferential surface of the tire; a strain detection means provided on the bottom surface and configured to detect strain of the tire; a support part extending from the bottom surface toward the inner circumferential surface of the tire and more protruding than a surface of the strain detection means; and an elastic part made of an elastomer having a rigidity smaller than that of a material forming the support part and interposed between the bottom surface and the inner circumferential surface of the tire.Type: ApplicationFiled: December 25, 2020Publication date: April 13, 2023Applicant: BRIDGESTONE CORPORATIONInventor: Shigeru YAMAGUCHI
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Publication number: 20230107811Abstract: A motorcycle tire having excellent handling stability and durability, includes a carcass as a skeleton composed of at least one carcass ply extending toroidally between a pair of bead portions and folded and engaged around a pair of bead cores embedded in each of the pair of bead portions and a belt composed of at least one belt layer arranged on the outer side of the carcass in the tire radial direction. A flipper is arranged between the carcass and a bead core, which wraps the bead core from the inside in the tire radial direction, and the outer side end portion of the flipper in the tire width direction extends to the inside in the tire width direction from the end portion of the belt in the tire width direction.Type: ApplicationFiled: January 12, 2021Publication date: April 6, 2023Applicant: BRIDGESTONE CORPORATIONInventor: Mitsuyuki MATSUDA
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Publication number: 20230094643Abstract: A lug groove and a sipe formed in an outside shoulder land portion are inclined in a first predetermined direction, a lug groove and a sipe formed in an outside second land portion are inclined in a second predetermined direction. A lug groove formed in a center land portion is inclined in the second predetermined direction, a sipe formed in the center land portion is inclined in the first predetermined direction. A lug groove formed in an inside second land portion is inclined in a first predetermined direction, a sipe formed in the inside second land portion is inclined in a second predetermined direction. A lug groove and a sipe formed in an inside shoulder land portion are inclined in a first predetermined direction, the lug groove formed in the inside second land portion and the lug groove formed in the inside shoulder land portion are formed by offsetting.Type: ApplicationFiled: March 4, 2021Publication date: March 30, 2023Applicant: BRIDGESTONE CORPORATIONInventors: Yuji KAJIYAMA, Kazuma HOSODA, Nanako SATO, Koji ASANUMA
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Patent number: 11613144Abstract: Provided is a pneumatic tire having both improved run-flat durability and excellent wet grip properties; the pneumatic tire including a rubber composition used in a tread part, and a rubber support layer having a gauge thickness in a specified range; the rubber composition including specified compounded amounts of natural rubber, a terminal-modified styrene-butadiene rubber, silica, and a thermoplastic resin, wherein the rubber composition is largely strain-dependent for the storage elastic modulus.Type: GrantFiled: August 31, 2018Date of Patent: March 28, 2023Assignee: BRIDGESTONE CORPORATIONInventor: Takeshi Tsubota
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Publication number: 20230091335Abstract: A method of manufacturing a test tire and a method of setting a tread removal shape include, moving an outline of a tread surface to set a remaining groove outline, setting a point B at the intersection of a line segment extending radially from a point A, on the tread surface at a position corresponding to 70% to 80% of the tread width, and the remaining groove outline, setting the remaining groove outline farther inward than point B as a first removal reference line, setting a line passing through point B and a point L, where a straight line yielded by a tangent to the tread surface at point A being translated to point B as a second removal reference line, and removing a portion of the tread, with reference to a tread removal shape defined by the first removal reference line and the second removal reference line.Type: ApplicationFiled: July 9, 2020Publication date: March 23, 2023Applicant: BRIDGESTONE CORPORATIONInventor: Eiichiro YAMANE
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Publication number: 20230088378Abstract: A wireless power transfer system 1 includes a power transmission device 2 and a power reception device 3. The power transmission device 2 is a power transmission device 2 installed in a road 4, is provided with a power transmission coil 21 that transmits power wirelessly, and is configured such that when installed in the road 4, the normal line of a coil plane of the power transmission coil 21 is inclined with respect to the normal line of the road surface of the road 4 in a lateral cross section of the road 4. The power reception device 3 is provided with a power reception coil 31 that receives power wirelessly, and at least a portion of the power reception coil 31 is housed in the wheel 6 of the moving body 5.Type: ApplicationFiled: September 10, 2020Publication date: March 23, 2023Applicants: THE UNIVERSITY OF TOKYO, BRIDGESTONE CORPORATION, NSK Ltd.Inventors: Hiroshi FUJIMOTO, Osamu SHIMIZU, Keizo AKUTAGAWA, Yasumichi WAKAO, Isao KUWAYAMA, Daisuke GUNJI
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Publication number: 20230090157Abstract: A wireless power reception system 1 includes: a power reception device 5 including a power reception coil 51 that receives power supplied wirelessly from a power transmission coil 41 of a power transmission device 4 installed in a road surface, at least a portion of the power reception coil 51 being housed in a wheel 3 of a moving body 2; and an onboard device 6 which is installed in the moving body 2 and which is electrically connected to the power reception device 5, wherein the power reception device 5 can transmit received power to the onboard device 6, and the power reception coil 51 has a convex shape pointing downward in a side view as seen from an axial direction of the wheel 3.Type: ApplicationFiled: September 10, 2020Publication date: March 23, 2023Applicants: THE UNIVERSITY OF TOKYO, BRIDGESTONE CORPORATION, NSK Ltd.Inventors: Hiroshi FUJIMOTO, Osamu SHIMIZU, Keizo AKUTAGAWA, Yasumichi WAKAO, Isao KUWAYAMA, Daisuke GUNJI
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Publication number: 20230086747Abstract: A wireless power reception system 1 includes: a power reception device 5 including a power reception coil 51 that receives power supplied wirelessly from a power transmission coil 41 of a power transmission device 4 installed in a road surface, at least a portion of the power reception coil 51 being housed in a wheel 3 of a moving body 2; and an onboard device 6 which is installed in the moving body 2 and which is electrically connected to the power reception device 5, wherein the power reception device 5 can transmit received power to the onboard device 6, and the power reception coil 51 includes a stacked plurality of spiral coil layers 52a and 52b.Type: ApplicationFiled: September 10, 2020Publication date: March 23, 2023Applicants: THE UNIVERSITY OF TOKYO, BRIDGESTONE CORPORATION, NSK Ltd.Inventors: Hiroshi FUJIMOTO, Osamu SHIMIZU, Keizo AKUTAGAWA, Yasumichi WAKAO, Isao KUWAYAMA, Daisuke GUNJI
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Publication number: 20230078891Abstract: An aircraft tire has a pair of bead sections, sidewall sections extending from the bead sections, and a tread section extending between the sidewall sections; the aircraft tire includes an RFID tag having a tag main body (IC chip) configured to store information about the aircraft tire, and an antenna extended from the tag main body, wherein, in a tread surface view, the antenna is disposed such that an extending direction of the antenna is parallel to a tire width direction or intersects the tire width direction within a predetermined angle range, and the aircraft tire satisfies a configuration 0.1<L/W<0.2, where a width of the aircraft tire is denoted as “W” and a total length of the antenna in the extending direction of the antenna is denoted as “L”, and when a diameter of the aircraft tire is 21 inches or more.Type: ApplicationFiled: February 16, 2021Publication date: March 16, 2023Applicant: BRIDGESTONE CORPORATIONInventors: Tomoyuki MURAMATSU, Toshihiko IWASAKI
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Publication number: 20230074848Abstract: An aircraft tire has a pair of bead sections, sidewall sections extending from outer side in a radial direction of the bead sections, and a tread section extending between the sidewall sections; the aircraft tire includes an RFID tag having a tag main body (IC chip) configured to store an information about the aircraft tire and an antenna extended from the tag main body, wherein, when a diameter size of the aircraft tire is 15 inches or less, in a tread surface view, the antenna is disposed such that the antenna is parallel to a tire circumferential direction or intersects the tire circumferential direction within a predetermined angle range, and a belt part disposed in the tread section is made of non-metal material.Type: ApplicationFiled: February 16, 2021Publication date: March 9, 2023Applicant: BRIDGESTONE CORPORATIONInventors: Tomoyuki MURAMATSU, Toshihiko IWASAKI
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Publication number: 20230072567Abstract: Provided is a rubber composition for base tread which can provide excellent steering stability and rolling resistance and improve pass-by noise properties when applied to a tire. The present disclosure discloses a rubber composition for base tread to be used for base tread of a tread portion of a tire, where a ratio of storage modulus at 0° C. (0° C. E?) to storage modulus at 30° C. (30° C. E?) (0° C. E?/30° C. E?) is in a range of 1.3 to 2.0.Type: ApplicationFiled: October 15, 2020Publication date: March 9, 2023Applicant: BRIDGESTONE CORPORATIONInventor: Shoko SUZUKI
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Publication number: 20230070044Abstract: A method for estimating a degree of wear of a tire by using: an index of deformation velocity at a tire contact edge or in the vicinity of the tire contact edge, the index of deformation velocity having been calculated from magnitude of one of or both of positive and negative peaks appearing in a radial acceleration waveform obtained by differentiating a time-series waveform of tire radial acceleration detected by an acceleration sensor; a contact time ratio of contact time to tire rotation time, the contact time being a time interval between the positive peak and the negative peak, the tire rotation time being a time interval between either of positive peaks or negative peaks; and a deformation amount which is a difference between a tire radius of the tire under a non-loaded state and an effective radius of the tire during travelling.Type: ApplicationFiled: December 25, 2020Publication date: March 9, 2023Applicant: BRIDGESTONE CORPORATIONInventor: Kenta NISHIYAMA
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Patent number: 11597240Abstract: A decorative body includes a first set through a fourth set that are a first solid shape pair at which initial points of respective vectors of a pair of reflecting pieces that are adjacent to one another are adjacent to one another and the respective vectors face in opposite directions, a second solid shape pair at which terminal points of a pair of respective vector of reflecting pieces that are adjacent to one another are adjacent to one another and the respective vectors face in opposite directions, a first solid shape group that is an aggregate in which three or more reflecting pieces at which the orientations of the vectors face in a same direction are continuous, and a third solid shape pair that is a pair formed from two reflecting pieces that do not belong to any of these.Type: GrantFiled: December 3, 2018Date of Patent: March 7, 2023Assignee: BRIDGESTONE CORPORATIONInventor: Naoko Ishikawa
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Patent number: 11591428Abstract: Methods are described for the preparation of tapered styrene-butadiene copolymers for use as partial or full oil replacements in rubber compositions. The resulting rubber compositions exhibit improved storage modulus and wear resistance properties.Type: GrantFiled: December 19, 2018Date of Patent: February 28, 2023Assignee: Bridgestone CorporationInventors: Wei Zhao, Yaohong Chen
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Patent number: 11591749Abstract: Provided is a steel cord for rubber article reinforcement, which has both the tensile strength in the cord axial direction and the strength in the shear direction at higher levels. A steel cord (10) for rubber article reinforcement includes: a single core strand (11) having a layer-twisted structure; and plural sheath strands (12) each having a layer-twisted structure, and the sheath strands (12) are twisted around the core strand (11). In the sheath strands (12), a ratio between the diameter of a core filament (12a) and the diameter of a sheath filament (12b) is 0.75 to 0.85, and a ratio between the strength of the core filament (12a) and the strength of the sheath filament (12b) is 0.55 to 0.7.Type: GrantFiled: June 12, 2020Date of Patent: February 28, 2023Assignee: BRIDGESTONE CORPORATIONInventor: Yuusuke Nozaki
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Patent number: 11584808Abstract: Without significantly impacting monomer conversion, the cis-1,4 mer content of conjugated diene mer in polymers can be increased by adding one or more Lewis bases to a catalyst composition that includes a Group 3 metal atom-containing carboxylate. This effect can be seen even at above average monomer concentrations.Type: GrantFiled: December 30, 2020Date of Patent: February 21, 2023Assignees: Bridgestone Corporation, Bridgestone Americas Tire Operations, LLCInventors: Steven M. Baldwin, James J. Kuhel, III
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Patent number: 11585044Abstract: A cord for reinforcing elastomers excellent in adhesion to elastomers such as rubber is provided. The cord is a cord for reinforcing elastomers (10) that includes metallic filaments (1) and a resin filament (2) twisted together, the resin filament (2) being made from a polymeric material having a melting point or softening point of 80 to 160° C.Type: GrantFiled: October 25, 2019Date of Patent: February 21, 2023Assignee: BRIDGESTONE CORPORATIONInventors: Takahisa Shizuku, Nobuhiro Ando, Norihiko Kaga
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Patent number: D981940Type: GrantFiled: March 19, 2021Date of Patent: March 28, 2023Assignee: BRIDGESTONE CORPORATIONInventors: Norimasa Yamashita, Takamitsu Nakamura
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Patent number: D981945Type: GrantFiled: April 27, 2021Date of Patent: March 28, 2023Assignee: BRIDGESTONE CORPORATIONInventor: Mayuko Karasawa
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Patent number: D983730Type: GrantFiled: November 24, 2021Date of Patent: April 18, 2023Assignee: BRIDGESTONE CORPORATIONInventor: Yoko Itai
