Patents Assigned to The Yokohama Rubber Co., Ltd.
  • Pneumatic tire
    Patent number: 11433712
    Abstract: Provided is a pneumatic tire. A sipe is formed, on each of a leading side edge and a trailing side edge, with a chamfered portion shorter than a sipe length of a sipe, a non-chamfered region in which no other chamfered portion is present is provided in a part facing each of the chamfered portions, at least one end of the sipe communicates with the auxiliary groove, one end of the chamfered portion adjacent to the auxiliary groove in the rib communicates with the auxiliary groove, a maximum depth×(mm) of the sipe and a maximum depth y (mm) of the chamfered portion satisfy a relationship x×0.1?y?x×0.3+1.0, and a sipe width W of the sipe is constant in a range from an end positioned in the radial direction inside the chamfered portion to a groove bottom of the sipe.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: September 6, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Takanori Uemura, Takayuki Shiraishi, Hiraku Kouda, Tatsuro Shinzawa
  • Pneumatic tire
    Patent number: 11427035
    Abstract: A pneumatic tire is provided with four or more circumferential main grooves extending in a tire circumferential direction and five or more land portions defined by the circumferential main grooves. Additionally, second land portions are each provided with first through lug grooves and second through lug grooves that extend through the second land portion in a tire lateral direction and are adjacently arranged in the tire circumferential direction. Crossing angles of the first through lug grooves and the second through lug grooves with respect to the outermost circumferential main grooves are mutually different.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: August 30, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Yasutaka Akashi
  • Aircraft water tank
    Patent number: 11427399
    Abstract: An aircraft water tank is provided. With an aircraft water tank being suspended by a fuselage via bushes, a load applied to each of the bushes is transferred from the bush and an attachment hole to a metal plate. The load transferred to metal plate is transferred to a total of four prepreg projection portions at a section of a thick wall portion of the metal plate and transferred to a total of eight prepreg projection portions at a section of a thin wall portion.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: August 30, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Yuji Taguchi, Hiroshi Hagiwara
  • Pneumatic tire
    Patent number: 11427038
    Abstract: A pneumatic tire of the present technology is a pneumatic tire provided with a tread portion, side wall portions and bead portions, a plurality of circumferential grooves extending in the tire circumferential direction being provided in the tread portion, and a belt-shaped sound-absorbing member being bonded via an adhesive layer to the tire inner surface in a region corresponding to the tread portion along the tire circumferential direction, wherein the width W of the sound-absorbing member is from 70% to 95% of the tire ground contact width TCW, and the total width of the circumferential grooves included in the region in the tire width direction in which the sound-absorbing member is disposed is from 25% to 40% of the width W of the sound-absorbing member.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: August 30, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Atsushi Tanno, Yousuke Sakamoto
  • Tire puncture sealing agent and tire puncture repair kit
    Patent number: 11420402
    Abstract: The present invention provides a tire puncture sealing agent having excellent storage performance, and a tire puncture repair kit. The tire puncture sealing agent of the present invention contains: a rubber latex and/or a resin emulsion; a predetermined glycol ether; and a non-ionic surfactant having an HLB value from 15 to 20.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: August 23, 2022
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Kiyohito Takahashi
  • Pneumatic tire
    Patent number: 11420481
    Abstract: A pneumatic tire includes a decorative portion on a tire side portion that is an outer surface of a sidewall portion. The decorative portion includes a plurality of ridges that extend along the tire side portion and are arranged side by side in the tire circumferential direction. The plurality of ridges include a common form of an inclination angle in the tire circumferential direction with respect to the tire radial direction and an interval between a pair of the plurality of ridges adjacent. The plurality of ridges constitute a ridge group. Three or more ridge groups are provided and the plurality of ridges of the different ridge groups are arranged intersecting one another. Accordingly, the pneumatic tire can reduce poor appearance of the sidewall portion.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: August 23, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Noboru Kuwahara, Masataka Kubota
  • Pneumatic tire
    Patent number: 11420484
    Abstract: A pneumatic tire includes a plurality of protrusion portions extending along a tire side surface of a tire side portion in a direction that intersects a tire circumferential direction and a tire radial direction. Each of the plurality of protrusion portions includes an intermediate portion and an end portion. The intermediate portion in an extension direction has a highest position of a projection height from the tire side surface. The end portion is provided on either end of the intermediate portion in the extension direction, and has a lowest position of the projection height from the tire side surface. The highest position of the projection height of the intermediate portion is disposed in a range of 20% of a tire cross-sectional height on an inner side and an outer side in the tire radial direction from a tire maximum width position.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: August 23, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Yuji Kodama
  • Conveyor belt management system
    Patent number: 11414275
    Abstract: A conveyor belt management system is capable of determining a suitable replacement period of the conveyor belt. Data of an amount of wear of an upper cover rubber of the conveyor belt installed at a use site is input into a server via an input unit. A calculation unit is configured to calculate a remaining service life of the conveyor belt based on the input data and, stored in a storage unit, a belt specification database and a tolerance range database in which a tolerance range is input in advance for the amount of wear per belt specification; and calculate an expected service life of the conveyor belt before use of the conveyor belt based on a correlation between a use condition and belt specifications of the conveyor belt used up until present, the use condition of the conveyor belt, and the specifications of the conveyor belt.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: August 16, 2022
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Gang Hou
  • Pneumatic tire
    Patent number: 11413909
    Abstract: A pneumatic tire includes a bead core including circumferential portions made of metal wire bundled in rows disposed at each bead portion; and a carcass layer turned up at end portions around the bead cores from a tire inner side to an outer side; the bead cores including at least two central layers centrally located in a tire radial direction, at least one upper layer outward of the central layers in the radial direction, and at least one lower layer inward of the central layers in the radial direction; a number of the circumferential portions made of metal wire in the central layers is equal to each other and a maximum value; and a number of the circumferential portions made of metal wire in the upper layer(s) and the lower layer(s) being reduced by one from the maximum value for each layer away from the central layers.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: August 16, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Yasutaka Akashi
  • Tire rubber composition
    Patent number: 11413905
    Abstract: The present technology provides a tire rubber composition formed by blending a microparticle composite, which is formed from a solid component of a mixture containing an emulsion of an organic microparticle and a rubber latex, in a sulfur vulcanizable rubber; the emulsion of the organic microparticle being an emulsion containing a microparticle obtained by polymerizing and/or crosslinking at least one selected from the group consisting of polymerizable monomers, and oligomers, prepolymers, and polymers having a reactive functional group and having a molecular weight from 500 to 50000 simultaneously or stepwise in water; and an average particle size of the microparticle being from 0.001 to 100 ?m.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: August 16, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Hirokazu Kageyama, Kazushi Kimura, Genichiro Shimada, Satoshi Mihara
  • Pneumatic tire
    Patent number: 11413908
    Abstract: A pneumatic tire has a side portion located between a tread portion and a bead portion which includes a decorative element. The decorative element comprises protrusions extending along the side portion and bending to form a hook. The protrusions are disposed at intervals with tips of the hooks aligned in the same direction. Each of the protrusions includes a first and second portions. The first portion extends from an inner side in the radial direction to an outer side in the radial direction. The second portion extends from a bend position of each one of the protrusions and forms an angle of 90° or greater with the first portion at the bend position. Each bend position mutually differs in position in the radial direction between the protrusions, and the interval between adjacent protrusions is wider at the second portion than at the first portion.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: August 16, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Kenichi Sato
  • Pneumatic tire
    Patent number: 11407255
    Abstract: A pneumatic tire includes: main grooves in a tread, extending in a circumferential direction in alignment in a lateral direction, defining a center land on an equatorial plane and middle lands on outer sides in the lateral direction; a sipe formed in the center land communicating with a center main groove and terminating within the center land, the sipe bending halfway through its length; a circumferential narrow groove in each of the middle lands dividing the middle lands into a rib-shaped middle inner land and a middle outer land; and lug grooves formed in the middle outer land in alignment in the circumferential direction, communicating with a shoulder main groove and the circumferential narrow groove and dividing the middle outer land into blocks. A width d1 of the middle inner land and a groove width d2 of the circumferential narrow groove satisfy a relationship of 0.1?d2/d1?0.4.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: August 9, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Masahiro Ebiko
  • Pneumatic tire
    Patent number: 11407257
    Abstract: A tread pattern of a pneumatic tire includes one center continuous land portion and two intermediate continuous land portions that are divided by four circumferential main grooves and that are not provided with lug grooves. Edges on both sides of one center main groove include groove chamfered portions having a chamfered width changing in the circumferential direction in a zigzag shape. In the regions of the intermediate continuous land portions, first sipes extending inward in the lateral direction from shoulder main grooves of the main grooves, which are positioned on outer sides in the lateral direction, are provided. The first sipes each include a sipe main body portion having a constant distance between sipe wall surfaces on a sipe bottom side and a sipe chamfered portion inclined so that the sipe wall surfaces are open toward the tread surface.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: August 9, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Ryouichi Tomomatsu
  • Pneumatic tire
    Patent number: 11407258
    Abstract: Provided is a pneumatic tire with a side pattern including a ridge pattern region provided with first ridges extending continuously in one direction at an interval; and a marking display region bordering and being surrounded by the ridge pattern region, the marking display region displaying markings including one or more of a letter, a number, a symbol, and/or a figure. The marking display region includes: a bordering ridge that borders an outer edge of the markings; and second ridges provided in an inner region of the markings and extending continuously in one direction at an interval from each other. Ends of the first ridges and the second ridges are connected to the bordering ridge, and apexes of the first ridges and the second ridges are flush with and connected to an apex of the bordering ridge.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: August 9, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Noboru Kuwahara
  • Pneumatic tire
    Patent number: 11400762
    Abstract: A pneumatic tire includes: a center lug groove extending in a lateral direction in a center land portion, the center lug groove connecting to two main groves at both ends; an outer middle lug groove extending in the lateral direction in an outer middle land portion, the outer middle lug groove connecting to two main groves at both ends; and an inner middle lug groove extending in the lateral direction in an inner middle land portion, the inner middle lug groove including an end connecting to the main groove of the two main grooves located inward in the lateral direction and the other end terminating within the inner middle land portion; and the center lug groove and the outer middle lug groove each including a central region in a length direction including a sipe portion, the sipe portion including a sipe with a chamfered opening portion.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: August 2, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Masatoshi Kuriyama
  • Pneumatic tire
    Patent number: 11400768
    Abstract: A pneumatic tire mountable on a 15° tapered specified rim, the pneumatic tire including a bead portion, bead core, a carcass, a steel cord reinforcing layer, and a bead rubber layer. A distance from a second line segment to a third line segment is from 4 mm to 8 mm, and a ratio R2/R1 is from 0.935 to 0.975, wherein R2 is a tire radius at a bead toe of a bead base portion and R1 is a tire radius at a bead heel.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: August 2, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Takayuki Suzuki
  • Rubber extrusion device and method for manufacturing rubber extrudate
    Patent number: 11396120
    Abstract: A rubber extrusion device includes a sensor which detects a deviation from a preset reference position of a rubber extrudate extruded from an extrusion port. Based on this detection data, a control unit provides control for correction of the deviation by adjusting a position of a die relative to a head along a leading end surface of the head or a rotational speed of a screw. A rubber material is mixed and kneaded while being extruded forward by a screw installed inside a cylinder. Resultant unvulcanized rubber is fed into an extrusion flow path and extruded from the extrusion port formed in the die.
    Type: Grant
    Filed: December 25, 2017
    Date of Patent: July 26, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Satoru Nishio, Yuki Furubayashi
  • Stud pin and studded tire
    Patent number: 11396211
    Abstract: A stud pin includes a tip, a body portion that supports the tip, and a lower flange connected to the body portion at an end on an opposite side to the end surface. A profile shape of the lower flange and a body profile shape of the body portion are anisotropic shape. The flange profile shape includes four or more first flange protrusion portions projecting toward the longitudinal direction and two second flange protrusion portions projecting toward the lateral direction. The body profile shape includes four or more first body protrusion portions projecting toward the lateral direction and two second body protrusion portions projecting toward the longitudinal direction.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: July 26, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Masakazu Mori
  • Pneumatic tire
    Patent number: 11390123
    Abstract: A pneumatic tire includes a longitudinal protrusion portion provided on at least one of tire side surfaces located on either side in a tire lateral direction, the longitudinal protrusion portion projecting from the tire side surface and extending along the tire side surface; and serration provided on the tire side surface in a region including an end portion of the longitudinal protrusion portion, the serration being formed of a plurality of small grooves arranged in parallel, and the plurality of small grooves being inclined with respect to a lateral centerline that passes through a center of the longitudinal protrusion portion in a width direction.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: July 19, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Katsuyoshi Sekine, Yuji Kodama, Noboru Kuwahara
  • Automobile tire
    Patent number: D958051
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: July 19, 2022
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Mizuki Kuninaka, Noboru Kuwahara