Patents Assigned to Bridgestone Corporation
  • Publication number: 20190248183
    Abstract: Provided is a pneumatic tire having at least one carcass layer as a skeleton extending in toroidal shape over a pair of bead portions, at least one belt layer and a tread disposed on an outer side in the radial direction of a crown portion of the carcass. In a tire section in the widthwise direction in state where the tire is assembled to an application rim, ratio BD/BW of radius difference BD between radius at a center portion and radius at an end portion in the widthwise direction of an innermost layer of the belt layer, to width BW of the innermost layer, ranges from 0.01 to 0.04, and ratio TD/TW of radius difference TD between radius at a center portion and radius at an end portion of the tread in the widthwise direction of a tread ground surface, to tread ground-contact width TW, satisfies BD/BW<TD/TW.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 15, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Shinsaku Katayama
  • Patent number: 10377433
    Abstract: In an elastic crawler (10) and an elastic crawler drive mechanism (100), at least a portion of the outer edge of an engaging portion (12) has a cross-sectional arc shape such that both the trajectory drawn by the outer edge of the engaging portion (12) from when the engaging portion (12) starts to enter a tooth groove of a sprocket (20) until engagement between the engaging portion (12) and teeth (22) is complete and the trajectory drawn by the outer edge of the engaging portion (12) from when the engaging portion (12) starts to disengage from the teeth (22) until disengagement is complete do not project further outward than the outer edge of the engaging portion (12) when the engagement is complete.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: August 13, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Takashi Mizusawa
  • Patent number: 10377060
    Abstract: A mold capable of imparting an appropriate amount of heat depending on a part of an object to be heated, the mold for transferring heat to the object to be heated is provided with a hollow portion inside the mold, and a heat amount adjusting agent, which is accommodated in the hollow portion, for changing heat transfer property of the hollow portion, in which the heat amount adjusting agent is made of a powdery or granular material having a material property different from a material property of the mold.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: August 13, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Tomo Koyanagi
  • Patent number: 10377385
    Abstract: The invention provides a road surface condition determining system with improved accuracy. In the system, a plurality of vehicles Wi are used, each equipped with on-board sensors (11, 12) for acquiring vehicular information, which is information on the behavior of the vehicle during travel, a feature value calculating means (13) for calculating a plurality of feature values to be used in estimating the condition of the road surface on which the vehicle is traveling from the vehicular information acquired by the on-board sensors (11, 12), and a transmitter 16 for transmitting the feature values to the outside of the vehicle. A server (20) has a data storage means (22) for accumulating the plurality of feature values from the plurality of vehicles. A road surface condition determining unit (30) determines a road surface condition using the accumulated feature values. And the system determines the road surface condition at the location within a predetermined range within a predetermined space of time.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: August 13, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Yasushi Hanatsuka
  • Patent number: 10377058
    Abstract: A tire mold capable of improving the efficiency in mold production and tire production without compromising the aesthetic quality and performance of a tire after cure-molding. To that end, the tire mold has a hole that penetrates from the molding surface for molding a rubber article to the back surface, a core member that is disposed inside the hole and forms an air discharge flow channel annular in cross section extending along the extension direction of the hole between itself and the hole wall forming the hole, and an interlinking part for interlinking the hole wall and the core member.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: August 13, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Shunsuke Hiraki
  • Patent number: 10369875
    Abstract: There is provided a torque rod (1) in which any one of a partition wall (27) between an interior of a first accommodation portion (15) for accommodating a first elastic bush (11) and an interior of a third accommodation portion (17) for accommodating an actuator (14) and a partition wall (28) between an interior of a second accommodation portion (16) for accommodating a second elastic bush (12) and the interior of the third accommodation portion (17) has a communication hole (29) for allowing the interiors of both the accommodation portions to communicate with each other, and a whole area of the other partition wall is closed. In the communication hole (29), a counterbore (29a) is formed in an end portion on a side opposite to the third accommodation portion (17). The torque rod includes a bolt (30) that is inserted into the communication hole (29), and that has a head portion (30a) accommodated in the counterbore (29a).
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: August 6, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Motohiro Yanagida, Akira Ueki
  • Patent number: 10370475
    Abstract: Elastomeric compounds having increased cold flow resistance may be obtained by utilizing from 10-100 phr of a functionalized rubbery polymer containing specified types of functionalizing units, at least 0.01 phr of a multivalent metal organic salt and 0-90 phr of at least one additional rubbery polymer.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: August 6, 2019
    Assignee: Bridgestone Corporation
    Inventors: Xiao-Dong Pan, Zengquan Qin, Yuan-Yong Yan
  • Patent number: 10370460
    Abstract: A method for producing a functionalized polymer, the method comprising the steps of: (i) preparing a bulk polymerization system including a reactive polymer by introducing a lanthanide-based catalyst and a conjugated diene monomer; (ii) adding a heterocyclic nitrile compound the polymerization system including the reactive polymer to prepare polymerization system including a functionalized polymer; and (iii) adding a protic compound to the polymerization system including a functionalized polymer where the ratio of water or protic hydrogen atoms in the protic compound to the lanthanide atoms in the lanthanide-based catalyst is at least 1500 to 1.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: August 6, 2019
    Assignee: Bridgestone Corporation
    Inventors: Kevin Michael McCauley, Timothy Leonard Tartamella, Zachary Aaron Bush
  • Publication number: 20190232721
    Abstract: At least one first circumferential direction groove is formed on a tread portion, the first circumferential direction groove including a plurality of bent portions so as to be extended in a zigzag manner in a tire circumferential direction. At least one lateral groove communicated with the first circumferential direction groove and extended in a tire width direction is formed. The bent portion is bent at an angle between 12 degrees and 41 degrees against a tire circumferential direction. A groove width of the first circumferential direction groove is set in a range between 13 mm and 19 mm. The first lateral groove includes an arc-shaped curve portion. A groove depth of the first lateral groove is smaller than a groove depth of the first circumferential direction groove. A groove width of the first lateral groove is smaller than a groove width of the first circumferential direction groove.
    Type: Application
    Filed: August 10, 2017
    Publication date: August 1, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Masashi YAMAGUCHI
  • Publication number: 20190232730
    Abstract: A tire capable of showing a sufficient cooling effect on a tire side portion when a vehicle travels at a low speed. A pneumatic tire includes a projection group in a tire side portion. A gap is formed between a first projection and a second projection. A size of the gap in a tire radial direction is smaller than a size of each of the first projection and the second projection in the tire radial direction.
    Type: Application
    Filed: June 19, 2017
    Publication date: August 1, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Naohiro HAYASHI
  • Publication number: 20190234016
    Abstract: Provided is a steel cord for reinforcing a rubber article which can further improve cut resistance when applied to a tire. Provided is a steel cord for reinforcing a rubber article including: one core strand 11 having a layered-twisted structure formed by twisting a plurality of steel filaments 1; and a plurality of sheath strands 12 having a layered-twisted structure formed by twisting a plurality of steel filaments 2, wherein the sheath strands are twisted around the core strand. A ratio S1/S of the sum S1 of cross-sectional areas of outermost layer sheath filaments constituting an outermost layer sheath of the core strand to the sum S of cross-sectional areas of all filaments constituting the core strand is from 0.69 to 0.74, and a ratio Ps/P of the sum Ps of strengths of the sheath strands to strength P of the cord as a whole is from 0.81 to 0.85.
    Type: Application
    Filed: April 9, 2019
    Publication date: August 1, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Yusuke NOZAKI
  • Patent number: 10364300
    Abstract: A method for preparing a coupled polymer, the method comprising the steps of polymerizing monomer to form a reactive polymer and reacting the reactive polymer with a carboxylic or thiocarboxylic ester containing a nitro group, where the carboxylic or thiocarboxylic ester containing a nitro group includes a single nitro group.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: July 30, 2019
    Assignee: Bridgestone Corporation
    Inventor: Steven Luo
  • Publication number: 20190226549
    Abstract: An anti-vibration device (1) of the present invention includes a cylindrical first attaching member (11) and a second attaching member (12), an elastic body (13), and a partition member (17) which is configured to partition a liquid chamber (14) in the first attaching member into a main liquid chamber (15) and an auxiliary liquid chamber (16). The partition member includes a membrane (31) that forms a part of the partition wall of the main liquid chamber, and an intermediate chamber (35) which is located on a side opposite to the main liquid chamber with the membrane therebetween and has a membrane as a part of a partition wall of the main liquid chamber.
    Type: Application
    Filed: July 13, 2017
    Publication date: July 25, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Hiroshi KOJIMA
  • Publication number: 20190224587
    Abstract: An extractor suitable for using a solvent to separate a compound from a solid or semisolid substance containing the compound. The extractor includes a conveying assembly having an inclined conveyor for receiving the substance from a substance inlet and moving the substance through the solvent, an inclined upper surface associated with the first conveyor and an inclined lower surface associated with the first conveyor. The conveyor is configured to move the substance downward through the solvent along the upper surface toward a lower end of the conveyor and upward through the solvent along the lower surface toward an upper end of the conveyor.
    Type: Application
    Filed: April 1, 2019
    Publication date: July 25, 2019
    Applicant: Bridgestone Corporation
    Inventors: Robert W. White, Michael R. Hartzell
  • Publication number: 20190225779
    Abstract: Provided is a rubber crawler including a guide rubber that is reduced in heat generation and excellent in abrasion resistance and an inner peripheral rubber that is excellent in scratch resistance and abrasion resistance and having excellent adhesiveness between the guide rubber and the inner peripheral rubber.
    Type: Application
    Filed: March 29, 2019
    Publication date: July 25, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Yoshikazu TANIMOTO
  • Publication number: 20190225016
    Abstract: A compound to produce an inner liner layer comprising a polymer base with a cross-linking unsaturated chain comprising at least 50 phr of a halobutyl rubber, a reinforcing filler, a vulcanization system and an oxygen-proofing chemical in granular form made up of a mineral filler bonded with fatty acids comprising a chain of carbon atoms ranging in number from 6 to 24 and having at least one unsaturation. The oxygen-proofing chemical is produced by causing the fatty acids and the mineral filler to react with a molar ratio that is equal to or greater than 5:2. The oxygen-proofing chemical in granular form has dimensions ranging from 5 nm to 50 ?M.
    Type: Application
    Filed: January 27, 2017
    Publication date: July 25, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Michele AMURRI, Claudio D'ALFONSO, Alessandro MAUCERI
  • Publication number: 20190225775
    Abstract: A rubber composition allows suppression of cracking and discoloration of a tire surface. The rubber composition includes a rubber component (A), a quinoline age resistor (B) including a polymer of 2,2,4-trimethyl-1,2-dihydroquinoline, and N-phenyl-N?-(1,3-dimethylbutyl)-p-phenylenediamine (C). The content ratio of the quinoline age resistor (B) is 0.1 mass % to 1.5 mass % in terms of the total amount of the rubber composition. The total content ratio of dimers and trimers of the 2,2,4-trimethyl-1,2-dihydroquinoline in the quinoline age resistor (B) is 60 mass % or more.
    Type: Application
    Filed: September 21, 2017
    Publication date: July 25, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Seiichi TAHARA
  • Publication number: 20190224933
    Abstract: A method for reducing the stickiness on the surface exposed to the air of a sealant layer applied on an inner cavity of a tyre. The method establishes that the surface exposed to the air of the sealant layer is subject to a UV radiation.
    Type: Application
    Filed: December 2, 2016
    Publication date: July 25, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Giuseppe PEZZULLO, Marco BRUNI, John Nazareno HOUSE
  • Publication number: 20190225067
    Abstract: A torque rod comprises: a first annular portion elastically connected to a first attachment member to be connected to a power unit; a second annular portion elastically connected to a second attachment member to be connected to a vehicle; a connection stay portion extending radially outward from an outer circumferential part of the second annular portion and connecting with an outer circumferential part of the first annular portion, and including an upper branch portion and a lower branch portion having lower bending strength than the upper branch portion; a wall portion connecting with the first annular portion and the connection stay portion, and forming a cavity to which part of the first annular portion is exposed; and a projection portion projecting in an axial direction of the first annular portion from a site of the first annular portion exposed to the cavity.
    Type: Application
    Filed: July 21, 2017
    Publication date: July 25, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Masaaki OHASHI, Toru EBARA
  • Patent number: D855014
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: July 30, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Shiho Kamada