Patents Assigned to The Yokohama Rubber Co., Ltd.
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Patent number: 11370254
    Abstract: A tire noise reduction device includes a sound absorbing member made of a porous material; and a band member disposed between the sound absorbing member and the tire inner surface and provided for attaching the sound absorbing member to a tire inner surface, the band member including chamfered portions on both surface sides at both ends in a width direction of the band member.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: June 28, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Masahiro Naruse
  • Patent number: 11370252
    Abstract: Provided is a pneumatic tire including a plurality of main grooves extending in the tire circumferential direction in a tread portion and including a sipe extending in a tire width direction on a rib defined by a main groove, the sipe includes a leading side edge and a trailing side edge, a chamfered portion shorter than a sipe length of the sipe is formed in each of the leading side edge and the trailing side edge, a non-chamfered region including no other chamfered portion is present in a part facing each chamfered portion of the sipe, and the rib includes an intersecting groove intersecting with at least one out of the sipe and the chamfered portion.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: June 28, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Hiraku Kouda, Takayuki Shiraishi, Tatsuro Shinzawa, Takanori Uemura
  • Patent number: 11364698
    Abstract: In a pneumatic tire production method including a step of overlapping end portions of a sheet laminate and vulcanization-molding the tire, the sheet laminate being obtained by layering an elastomer layer and a sheet of a thermoplastic resin composition containing a thermoplastic resin or a blend of a thermoplastic resin and an elastomer, after the end portions of the sheet laminate are overlapped, the overlapped portion of the sheet laminate is compression-bonded at a temperature of not less than a glass transition temperature Tg of the thermoplastic resin and not greater than 120° C.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: June 21, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Hideki Seto, Shusaku Tomoi, Hirokazu Shibata
  • Patent number: 11364750
    Abstract: A pneumatic tire is provided. In a meridian cross-section, an external contour shape of the bead core is a polygon formed by common tangent lines of a plurality of circumferential portions of a bead wire, the external contour shape includes a single vertex located toward the outside in a tire radial direction, an internal angle formed by two sides sandwiching the vertex is an acute angle, a bottom side of the external contour shape is inclined with respect to the tire lateral direction by from 2° to 9°, and the carcass layer is bent and folded back along a circumference of the bead core in a bead portion, a folded back portion of the carcass layer from a position of an outer end of the bead core in the tire radial direction extends toward a sidewall portion in contact with a body portion.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: June 21, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Ryohei Takemori, Masaaki Nagayasu, Yuki Sasaya, Atsushi Tanno, Hiraku Kouda, Jun Matsuda
  • Patent number: 11364749
    Abstract: A tire side surface of a pneumatic tire includes a two-dimensional code in which a dot pattern is formed by two types of gray scale elements formed identifiable from each other by recesses and protrusions of the tire side surface, or a predetermined two-dimensional code arrangement region. The tire side surface further includes at least two marks formed in a protruded shape or a recessed shape, and the two marks are disposed on an identical position in a first direction of a tire radial direction and a tire circumferential direction and disposed separated from each other at different positions in a second direction of the tire radial direction and the tire circumferential direction to sandwich an outer edge of the two-dimensional code or the predetermined two-dimensional code arrangement region from the opposite sides in at least one of the tire radial direction or the tire circumferential direction.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: June 21, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Atsuya Hatano
  • Patent number: 11364751
    Abstract: In a pneumatic tire mountable on a 5°-tapered rim, a bottom of a bead core is inclined from 0°-5° in a direction in which the bottom diverges toward an outer side in a radial direction as the bottom extends from an inner side in the width direction toward an outer side in the width direction. Each bead portion includes a base, a toe, and a heel. The base is inclined from 8°-12° in a direction in which the bead base portion diverges toward the outer side in the radial direction as the base extends from the inner side toward the outer side in the width direction. The heel has a radius of curvature from 25-30 mm. A rim cushion rubber has a modulus at 100% elongation within a range from 5.0-8.0 MPa. The toe has a displacement between before and after mounting on the rim from 9.0-13.5 mm.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: June 21, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Hiroaki Honda
  • Patent number: 11364746
    Abstract: A rib of a pneumatic tire includes a first sipe extending from one of main grooves positioned on both sides of the rib and a second sipe extending from another one of the main grooves, one end portion of the first and second sipes terminating within the rib. The first and second sipes form a pair of sipes including edges on leading and trailing sides. Chamfered portions shorter than a total sipe length of the pair of sipes are formed on respective edges and non-chamfered regions exist on portions opposing respective chamfered portions in the pair of sipes. A maximum depth x (mm) of the sipes and a maximum depth y (mm) of the chamfered portion satisfy x×0.1?y?x×0.3+1.0. A sipe width is constant in a range from a portion positioned inside in a tire radial direction of the chamfered portion to a bottom of the sipes.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: June 21, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Takanori Uemura, Hiraku Kouda, Tatsuro Shinzawa
  • Patent number: 11364745
    Abstract: A pneumatic tire includes, in a tread portion, main grooves extending in a circumferential direction; ribs defined by the main grooves; at least one rib comprising sipes extending in a lateral direction; the sipes comprising a chamfered sipe with a chamfer portion provided on at least one edge, and a non-chamfered sipe with no chamfer portion provided on an edge; the chamfered sipe comprising one end portion terminating in the at least one rib and another end portion communicating with one of the main grooves located on either side of the at least one rib; a plurality of the chamfered sipes communicating with one of the main grooves located on either side of the at least one rib being alternately disposed in the circumferential direction; and the non-chamfered sipe being disposed close to the chamfered sipe on at least one side in the circumferential direction.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: June 21, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Masatoshi Shimizu
  • Patent number: 11364748
    Abstract: A pneumatic tire includes lug grooves in a tread surface of a shoulder land, the lug grooves crossing a circumferential direction and terminating at a first side within the shoulder land and passing through a contact edge at a second side; and a notch formed on an opening edge of the lug grooves, the notch being cutout from the tread surface cut radially inward. The lug grooves have a width decreasing from the first to the second side, an end position of the lug grooves is disposed from a main groove from 5% to 35% of a lateral dimension from the main groove to the ground contact edge, and a maximum groove width position is disposed from the main groove 40% or less of the lateral dimension from the main groove to the ground contact edge; and the notch has a width that increases from the first to the second side.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: June 21, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Hiroshi Furusawa
  • Patent number: D956668
    Type: Grant
    Filed: August 5, 2020
    Date of Patent: July 5, 2022
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Kento Ishizu, Shunya Harada
  • Patent number: D958050
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: July 19, 2022
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Mizuki Kuninaka, Noboru Kuwahara
  • 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