Having Groove Or Sipe With Specified Dimension Or Structure Therewithin Patents (Class 152/209.18)
  • Patent number: 11958319
    Abstract: A heavy truck tire directional tread is provided that has two successive asymmetrical sipes (14) in the longitudinal direction that share at least some of the same offset from a tread edge in the lateral direction. Each of the two asymmetrical sipes (14) has a body (28) and a tear drop (30). The surface of the bottom of the sipe (14) has a radius of curvature that is not the same along the entire surface of the bottom. The geometry of the sipes resists crack initiation and propagation and is governed by the equation RA.B-avg>1-4×Rref, wherein Ra.B-avg is the average radius of a particular portion of the bottom of the sipe, and Rref is a reference radius of the bottom of the sipe.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: April 16, 2024
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventor: Victor Abarotin
  • Patent number: 11951773
    Abstract: Tread (1) for a tire of a heavy-duty vehicle, having a tread surface (10), this tread (1) comprising, near to each of its edges (11), a plurality of open wells (2) on the tread surface when new, these open wells (2) of depth Pmax being arranged circumferentially with a mean distance D between two consecutive open wells; each open well (2) being delimited by two main faces (21, 22) facing one another, this tread being such that each open well (2) is connected to at least one hidden cavity (32) formed within the tread, this hidden cavity (32) opening into a main face (21, 22) of said well.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: April 9, 2024
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventor: Frédéric Domprobst
  • Patent number: 11945261
    Abstract: Provided is a tire including, in a surface of a tread of the tire, a land portion row in which four land portions are arranged in parallel in a width direction of the tread, in a land portion on one end side of the land portion row, a recess that opens in a circumferential groove on an adjacent land portion side, and an intermittent sipe extending in an orientation intersecting the width direction of the tread, intermittently by being interrupted by the circumferential groove, from a position of a start end corresponding to the recess, across three land portions of the four land portions excluding the land portion on the one end side, wherein the intermittent sipe opens in a surface of each of the three land portions via an inclined surface from the surface of each of the three land portions toward the intermittent sipe.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: April 2, 2024
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Takamitsu Nakamura
  • Patent number: 11904561
    Abstract: A green tire includes a plurality of sheets of green rubber having a substantially circular shape, with each sheet having a tread region disposed along a circumference. A plurality of objects are sandwiched between adjacent sheets of green rubber in the tread region. Each object is constructed of a material selected from the group consisting of steel, polyester, nylon, carbon fiber, aramid, fiber glass, cotton, hemp, polyurethane and other plastic, other synthetic or natural fibers and other metal materials.
    Type: Grant
    Filed: September 17, 2021
    Date of Patent: February 20, 2024
    Assignee: Bridgestone Americas Tire Operations, LLC
    Inventors: Andrew V. Haidet, Douglas B. Costlow, Robert W. Asper
  • Patent number: 11904636
    Abstract: A pneumatic tire includes, in a land portion, at least one circumferential sipe extending in the tire circumferential direction. At a first position, from the tread surface towards the sipe bottom, the sipe width gradually decreases from the tread surface to a first changing point and then gradually increases from the first changing point to the sipe bottom. At a second position, from the tread surface towards the sipe bottom, the sipe width gradually increases from the tread surface to a second changing point and then gradually decreases from the second changing point to the sipe bottom. The sipe width at the tread surface and at the sipe bottom gradually decreases in the tire circumferential direction from the first position towards the second position, and the sipe width in a tire radial intermediate portion gradually increases in the tire circumferential direction from the first position towards the second position.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: February 20, 2024
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Akiyoshi Shimizu
  • Patent number: 11897288
    Abstract: In a pneumatic tire, a block includes recess/protrusions on a road contact surface. Additionally, a recess/protrusion height of the recess/protrusions is from 0.1 mm to 1.0 mm. A width of the recess/protrusions is from 0.1 mm to 0.8 mm. A recess/protrusion region is where an arrangement interval between adjacent recess/protrusions is not greater than 1.2 mm. A smooth region other than the recess/protrusion region has an arithmetic mean roughness of the road contact surface of the block not greater than 50 ?m. A lateral length of the road contact surface of the block in a tire lateral direction is defined. In this case, the block includes the recess/protrusion region and the smooth region in an optional cross-section in a lateral range of not less than 40% of a lateral length of the road contact surface of the block.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: February 13, 2024
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Isamu Kishizoe
  • Patent number: 11878555
    Abstract: A tire includes a tread portion including a first land portion, the first land portion being provided with a plurality of first sipes. The plurality of first sipes extends in an arc shape manner. The plurality of first sipes is arranged on the first land portion without communicating with lateral grooves extending in a tire axial direction. In a tread plan view, a virtual sipe reference line of each of the plurality of first sipes has an angle equal to or less than 10 degrees with respect to a tire circumferential direction, wherein the virtual sipe reference line is a straight line that connects both ends of each of the plurality of first sipes.
    Type: Grant
    Filed: March 10, 2022
    Date of Patent: January 23, 2024
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Ryotaro Kitahara, Hiroshi Yamaoka
  • Patent number: 11850891
    Abstract: A tire includes a first land portion with a ground contacting surface provided with inclined sipes inclined in a first direction to the tire axial direction. The inclined sipes include first and second inclined sipes arranged adjacently in the tire circumferential direction. Each first inclined sipe includes a first deep-bottom portion located on a first circumferential edge side, and a first shallow-bottom portion located on a second circumferential edge side and having a smaller depth than the first deep-bottom portion. Each second inclined sipe includes a second deep-bottom portion located on the second circumferential edge side, and a second shallow-bottom portion located on the first circumferential edge side and having a smaller depth than the second deep-bottom portion. Each second deep-bottom portion is arranged so as to overlap a projection region in which a respective first deep-bottom portion is expanded parallel to the tire axial direction.
    Type: Grant
    Filed: September 22, 2021
    Date of Patent: December 26, 2023
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Kazuki Yamaguchi, Mari Mishima
  • Patent number: 11794527
    Abstract: A tire with a resonator for noise reduction includes: a main groove unit which has a plurality of main grooves formed to extend along a circumferential direction of the tire; a resonance unit which is formed between a pair of the main grooves; a neck unit which is provided to communicate the resonance unit with one of the pair of main grooves; and a cuff unit which is provided to connect the resonance unit and the other of the pair of main grooves.
    Type: Grant
    Filed: November 10, 2020
    Date of Patent: October 24, 2023
    Inventors: Il Sik Kim, Jeong Eun Cho, Su Jin Son, Kang Il Jung, Chang Hyo Hong, Jae Wook Ihm
  • Patent number: 11780272
    Abstract: A tire includes a tread portion. The tread portion is provided with grooves each having a pair of groove walls. At least one of the groove walls is provided on a surface thereof with a pattern portion having a plurality of micro-protrusions. The pattern portion is provided with the micro-protrusions at a density of 1 to 5 per 1 mm2 of the groove wall area.
    Type: Grant
    Filed: January 5, 2022
    Date of Patent: October 10, 2023
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Shingo Nobukuni
  • Patent number: 11766899
    Abstract: A pneumatic vehicle tire including a utility vehicle tire has a tread with profile positives which are separated from one another in a circumferential direction by transverse channels which extend continuously from the central region of the tread as far as the lateral tread edges, respectively. The transverse channels are main channels of the tread and, at least over the major part of the course thereof, have the maximum provided profile depth. The transverse channels are provided, on the respective channel base thereof, with a row of base elevations formed so as to be distributed over the entire course of the transverse channels. The base elevations are attached to the channel flanks of the transverse channels and are configured such that their rubber volume becomes smaller the closer to the tread edge they are disposed.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: September 26, 2023
    Assignee: Continental Reifen Deutschland GmbH
    Inventors: Florian Kristen, Andreas Haertwig, Chun Yi Yeo
  • Patent number: 11760134
    Abstract: Tread (1) for a heavy-duty vehicle tire having, when new, a tread surface (10), with at least one evolving cut (2) comprising a part (22) hidden inside the tread which is delimited by opposing walls (221, 222) distant from one another by a maximum width Lc. The part (22) being extended towards the tread surface (10) by a sipe (21), opening into the hidden part (22) to be offset from one of the walls (221, 222) delimiting the hidden part to form a bridge situated radially over said hidden part (22). The tread having a plurality of grooves (4) open when new onto the tread surface (10), these grooves (4) opening into an evolving cut (2) to form a connecting region (41), the tread (1) further comprising, in at least 50% of the connecting regions (41, 42), a protuberance (5) extending over the entire height Hc of the hidden part (22) and over a maximum thickness Ep so as to act as a support for the bridge (211) situated radially over the hidden part (22) in the connecting region (41).
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: September 19, 2023
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventor: Damien Bardin
  • Patent number: 11752805
    Abstract: In a pneumatic tire including main grooves extending in a tire circumferential direction in a tread portion, and including a sipe extending in a tire lateral direction on a rib defined by the main grooves, the sipe includes an edge on a leading side and an edge on a trailing side, chamfered portions shorter than a sipe length of the sipe are formed on respective edges, non-chamfered regions on which no other chamfered portion exists exist on portions opposing to respective chamfered portions in the sipe, a maximum depth x (mm) of the sipe and a maximum depth y (mm) of the chamfered portion satisfy x×0.1?y?x×0.3+1.0, and a sipe width of the sipe is constant in a range from an end portion positioned inside in a tire radial direction of the chamfered portion to a groove bottom of the sipe.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: September 12, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Hiraku Kouda, Tatsuro Shinzawa, Takanori Uemura
  • Patent number: 11752801
    Abstract: In order to improve shock burst resistance performance while suppressing a decrease in separation resistance performance, a pneumatic tire includes a tread portion, a belt layer, and a belt cover layer. The belt layer is disposed in the tread portion. The belt cover layer is disposed on an outer side in a tire radial direction of the belt layer. The belt cover layer includes: two layers of full covers disposed between shoulder regions on both sides in a tire width direction and layered in the tire radial direction; and a narrow cover formed with a width in the tire width direction narrower than widths of the full covers. The narrow cover is disposed at a position between the two layers of the full covers and on an inner side in the tire width direction than the shoulder regions.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: September 12, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Noriyoshi Koyama
  • Patent number: 11752806
    Abstract: A pneumatic tire is provided. Center blocks in a center region are in pairs across grooves inclined with respect to a circumferential direction. Each of the center blocks extends from one side to the other of an equator and includes a notch defined by a first and second walls connected in a V-shape in a tread contact surface. The first wall extends within ±20° of the circumferential direction, the second wall extends within ±10° of a lateral direction, an average angle of sipes formed in one of the center blocks and the shoulder blocks is smaller than or equal to 90°±10° with respect to the equator for a first region, smaller than or equal to 130°±10° for a second region, and smaller than or equal to 70°±10° for a third region, and each of the sipes includes at least one bent portion.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: September 12, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Yuhei Suzuki
  • Patent number: 11731463
    Abstract: A tire has a tread portion comprising: a crown land zone provided with a crown auxiliary groove and crown lateral grooves; and a shoulder land zone provided with a shoulder auxiliary groove and shoulder lateral grooves. The axial width of the shoulder land zone is larger than the axial width of the crown land zone. The groove widths of the crown auxiliary groove and the shoulder auxiliary groove are smaller than that of a shoulder main groove. The lateral crown groove comprises a radially outer wide portion and a radially inner narrow sipe-like portion.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: August 22, 2023
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Hana Sato
  • Patent number: 11718129
    Abstract: A pneumatic tire includes a tread surface, a plurality of circumferential main grooves formed on the tread surface and extending in a tire circumference direction, a plurality of lug grooves formed on the tread surface and extending in a tire lateral direction, a plurality of blocks defined by the lug grooves on both sides in the tire circumferential direction and by the circumferential main grooves on at least one end in the tire lateral direction, and narrow grooves formed in the blocks. The narrow grooves include a plurality of bent portions as well as a circumferential narrow groove extending in the tire circumference direction and a lateral narrow groove extending in the tire lateral direction. The lateral narrow groove and the circumferential narrow groove are configured so that at least one thereof is provided in a plurality and includes a plurality of intersection points where the one intersects the other.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: August 8, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Takayuki Suzuki
  • Patent number: 11701926
    Abstract: In a pneumatic tire, a sipe includes an edge on a leading side and an edge on a trailing side; the edge and the edge each include a chamfered portion shorter than a sipe length of the sipe; a non-chamfered region in which other chamfered portions are not present is provided at portions facing the chamfered portions of the sipe; and for all chamfered portions, including at least the chamfered portions of the sipe, formed on grooves other than main grooves, with a ground contact width being equally divided into three in the tire lateral direction, a total projected area ACE of chamfered portions provided in a center region centrally located in the tire lateral direction and each of total projected areas ASH of chamfered portions provided in shoulder regions located on either side of the center region satisfy a relationship ACE<ASH.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: July 18, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Takanori Uemura, Takayuki Shiraishi, Hiraku Kouda, Tatsuro Shinzawa
  • Patent number: 11691459
    Abstract: A tire comprises a tread portion. The tread portion is provided with a sipe. The sipe comprises four sipe segments: a first sipe segment, a second sipe segment, a third sipe segment, and a fourth sipe segment. At least one of the first sipe segment and the third sipe segment comprises an oscillated portion which extends in the radial direction of the tire, while oscillating in a lateral direction orthogonal to the length direction of the sipe in a cross section of the sipe orthogonal to the length direction. Each of the first sipe segment and the third sipe segment comprises the oscillated portion including an oscillating-start portion, and the oscillating-start portion of the first sipe segment is inclined with respect to the tire radial direction in the same direction as the oscillating-start portion of the third sipe segment.
    Type: Grant
    Filed: March 4, 2021
    Date of Patent: July 4, 2023
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Kazuma Mori
  • Patent number: 11685195
    Abstract: A tread pattern of a pneumatic tire includes continuous lands provided in half treads on first and second sides, circumferential main grooves, and sipes having a chamfered configuration. The sipes extend inward in a lateral direction from the circumferential main grooves and are closed in the middle of regions of the continuous lands. An edge shape of each of sipes on the first side includes an extending portion extending inward in the lateral direction constantly in an extension direction and a bent portion that is provided to be joined to an end of the first extending portion and that has the edge shape bent from the extension direction of the first extending portion to a direction close to the circumferential direction. Every portion of the first extending portion and the bent portion of the sipes are provided with a main body portion and a sipe chamfered portion.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: June 27, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Ryouichi Tomomatsu
  • Patent number: 11673428
    Abstract: A tire includes a block 30. The block 30 includes a land 36b, a transverse groove 48b, a longitudinal groove 50b, and a side surface 38b. The land 36b is flat. The transverse groove 48b is recessed from the land 36b. The transverse groove 48b has inner and outer ends 52 and 54 in an axial direction of the tire. The inner end 52 of the transverse groove 48b is open on the side surface 38b. The outer end 54 of the transverse groove 48b is not open on the side surface 38b. The transverse groove 48b is localized in the inner region of the block 30 in the axial direction.
    Type: Grant
    Filed: April 14, 2021
    Date of Patent: June 13, 2023
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventor: Makoto Sueishi
  • Patent number: 11628690
    Abstract: A tire has a tread portion having a second middle land region which is provided with middle lateral grooves and circumferentially divided into middle blocks. Each middle block is provided with two first middle sipes extending from a second shoulder circumferential groove, and one second middle sipe disposed between the two first middle sipes. Each first middle sipe extends in a wavy manner in its depth direction. The second middle sipe extends straight in its depth direction. The second middle sipe extends from the second shoulder circumferential groove and is terminated within the second middle land region.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: April 18, 2023
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Yoshifumi Kawagoe
  • Patent number: 11541693
    Abstract: A tire includes, in a tread portion, a pair of shoulder main grooves, a crown region between the shoulder main grooves, and shoulder regions disposed outside of the shoulder main grooves in a tire axial direction. Land ratios of the crown region and the shoulder regions are respectively 40%-60%. In the crown region, a plurality of middle blocks are arranged on both sides of a tire equator, and each middle block has a longitudinal shape in which a length in the tire circumferential direction is larger than a length in the tire axial direction.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: January 3, 2023
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Sho Ito, Takafumi Hoshino
  • Patent number: 11535063
    Abstract: Provided is a pneumatic tire. At least three blocks of a plurality of blocks formed on a tread portion, which include an outermost block positioned on an outermost side in a tire lateral direction and are adjacent to each other in the tire lateral direction, and at least two longitudinal grooves positioned between the at least three blocks are arranged on a platform, which is raised from a groove bottom of a lateral groove, has a flat top surface, and has a shape protruding toward both sides in a tire circumferential direction with respect to the at least three blocks. On a groove bottom of a longitudinal groove adjacent to the outermost block, a raised bottom portion raised from the groove bottom of the longitudinal groove is provided. The raised bottom portion connects the outermost block and the block adjacent to the outermost block.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: December 27, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Hiroyuki Yoshida
  • Patent number: 11518196
    Abstract: The present disclosure is directed to tire tread blocks each having a sipe and cut-out portions that reveal a three dimensional sipe pattern on interior walls of the tread block. More particularly, the sipe defines the interior walls of the tread block and divides the tread block into first and second portions. The sipe further defines the sipe pattern on the interior walls of the tread block, on the first and second portions. The cut-out portions are located on the first and second portions, and expose the sipe patterns on the second and first portions, respectively.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: December 6, 2022
    Assignee: Bridgestone Americas Tire Operations, LLC
    Inventor: Kevin E. Scheifele
  • Patent number: 11505005
    Abstract: A first and a second tread pattern portions P1 and P2 on each side of a tire equator (Co) are line symmetry except being circumferentially misaligned, and are each provided with oblique lateral grooves 3, inner and outer joint grooves 4 and 5 connecting between the circumferentially adjacent oblique lateral grooves 3, inner terminating grooves 7 disposed between the inner and outer joint grooves 4 and 5, outer terminating grooves 8 disposed between the outer joint grooves and a ground contact edge (TE), and center joint grooves 6 alternately connecting the oblique lateral grooves of the first and second tread pattern portions. The inner and outer joint grooves 4 and 5 and the inner and outer terminating grooves 7 and 8 are inclined to different directions from the oblique lateral grooves 3. The outer terminating grooves 8 extend on extended lines of the outer joint grooves 5.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: November 22, 2022
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Hiroyuki Ishino
  • Patent number: 11491822
    Abstract: A modulus at 300% elongation of a cap tread ranges from 3.0 Mpa to 7.0 Mpa, a modulus at 300% elongation of a undertread ranges from 10.0 Mpa to 20.0 Mpa, and a modulus at 300% elongation of an earthing tread ranges from 10.0 Mpa to 20.0 Mpa. Additionally, an earthing tread is made from a rubber material with a volume resistivity of 1×10{circumflex over (?)}7?·cm or less. The undertread includes a thickened portion in a region between the earthing tread and an edge portion of a block. The gauge of the undertread gradually increases from the earthing tread toward the edge portion of the block due to the thickened portion.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: November 8, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Isamu Kishizoe
  • Patent number: 11479061
    Abstract: A tire that can suppress an unused tire from giving an impression like a worn tire as compared with a case where the brightness of a tread surface and the brightness of a bottom surface of a groove are the same is obtained. The tread portion includes a tread portion including a tread surface and a groove that partitions the tread surface; and a plurality of protrusions that protrude from a bottom surface of the groove at a height of from 0.1 mm to 1.0 mm and are arranged at an interval of from more than 0.1 mm to 1.0 mm. A ratio of a height of the protrusions to a depth of the groove (protrusion height/groove depth) is from 0.02 to 0.2 mm.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: October 25, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Sotaro Iwabuchi
  • Patent number: 11465449
    Abstract: Tread (2) of a radial tire for a heavy vehicle. The tire alternatingly rolls in laden and unladen states on descent and ascent, respectively. Tread (2) has total width WT and comprises first median portion (21) having median width Wc, where 0.2WT?Wc?0.5WT. Tread (2) is axially delimited by second and third lateral portions (22, 23) having respective lateral widths (WS2, WS3) at least equal to 25% and at most equal to 40% of total width WT. Angle A51 of leading face (51) of every element in relief (31) of first median portion (21) is strictly greater than angle A61 of trailing face (61) of said element in relief (31). Angle (A52, A53) of leading face (52, 53) of every element in relief (32, 33) of each of the second and third lateral portions (22, 23) is strictly less than angle (A62, A63) of trailing face (62, 63) of said element in relief (32, 33).
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: October 11, 2022
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventor: Philippe Mansuy
  • Patent number: 11465447
    Abstract: A two-wheeled vehicle tyre includes a tread portion being provided with a belt layer and a tread rubber disposed radially outwardly of the belt layer. The belt layer includes steel cords oriented along a tyre circumferential direction. The tread rubber includes a cap rubber forming a tread surface and a base rubber disposed radially inwardly of the cap rubber, wherein 300% modulus (M300c) of the cap rubber is greater than 300% modulus (M300b) of the base rubber, and loss tangent (tan ?c) of the cap rubber is smaller than loss tangent (tan ?b) of the base rubber.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: October 11, 2022
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Kyosuke Kono
  • Patent number: 11458774
    Abstract: A sipe includes a first widened and a second widened portion. In a cross section orthogonal to the sipe extending direction, the sipe includes at least one bent portion, at least one bent portion has a widened portion where the width of sipe portions sandwiching the bent portion is increased, and at least one widened portion has a straight line portion, in which an angle formed with a line segment orthogonal to the normal line at the opening center of the sipe on the tread surface is 30° or more, in a wall surface on the major angle side of the bent portion of wall surfaces defining the widened portion.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: October 4, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Yoshio Kaji
  • Patent number: 11453247
    Abstract: A pneumatic tire comprises at least one block partitioned by a block partitioning groove, the at least one block comprises a first block groove extending from an edge toward a first side in a tire circumferential direction of the at least one block so as to be directed toward a second side in the tire circumferential direction, and a second block groove extending from an edge toward the second side in the tire circumferential direction of the at least one block so as to be directed toward the first side in the tire circumferential direction, and the first block groove and the second block groove appear to overlap as viewed in a tire width direction.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: September 27, 2022
    Assignee: TOYO TIRE CORPORATION
    Inventor: Yoshiki Sato
  • Patent number: 11446963
    Abstract: A tyre includes a tread portion including a first middle land portion, a second middle land portion, a first shoulder land portion, and a second shoulder land portion. The first middle land portion is provided with first middle lateral grooves terminating within the first middle land portion, the second middle land portion is provided with second middle lateral grooves terminating within the second middle land portion, the first shoulder land portion is provided with first shoulder lateral grooves, and the second shoulder land portion is provided with second shoulder lateral grooves. The first middle lateral grooves and the second middle lateral grooves are inclined in a first direction with respect to the tyre axial direction, and the first shoulder lateral grooves and the second shoulder lateral grooves are inclined in a second direction opposite to the first direction with respect to the tyre axial direction.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: September 20, 2022
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Maiko Tanabe, Ryo Oba, Tetsuya Maekawa
  • Patent number: 11446965
    Abstract: In a pneumatic tire, a sipe includes an edge on a leading side and an edge on a trailing side; the edge on the leading side and the edge on the trailing side each include a chamfered portion shorter than a sipe length of the sipe; a non-chamfered region in which other chamfered portions are not present is provided at portions facing the chamfered portions of the sipe; and for all chamfered portions, including at least the chamfered portions of the sipe, formed on grooves other than main grooves, a total projected area AIN of the chamfered portions located on a vehicle mounting inner side and a total projected area AOUT of the chamfered portions located on a vehicle mounting outer side satisfy a relationship AIN>AOUT.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: September 20, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Takanori Uemura, Takayuki Shiraishi, Hiraku Kouda, Tatsuro Shinzawa
  • Patent number: 11433713
    Abstract: In a pneumatic tire, a sipe includes an edge on a leading side and an edge on a trailing side; the edge and the edge each include a chamfered portion shorter than a sipe length of the sipe; a non-chamfered region in which other chamfered portions are not present is provided at portions facing the chamfered portions of the sipe; and for all chamfered portions, including at least the chamfered portions of the sipe, formed on grooves other than main grooves, with a ground contact width being equally divided into three in the tire lateral direction, a total volume SCE of chamfered portions provided in a center region centrally located in the tire lateral direction and each of total volumes SSH of chamfered portions provided in shoulder regions located on either side of the center region satisfy a relationship SCE<SSH.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: September 6, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Hiraku Kouda, Takayuki Shiraishi, Tatsuro Shinzawa, Takanori Uemura
  • Patent number: 11433710
    Abstract: A pneumatic tire is provided with a sipe including an edge on a leading side and an edge on a trailing side. The edge on the leading side and the edge on the trailing side each include a chamfered portion shorter than a sipe length of the sipe. A non-chamfered region in which other chamfered portions are not present is provided at portions facing the chamfered portions of the sipe. For all chamfered portions, including at least the chamfered portions of the sipe, formed on grooves other than main grooves, a total volume SIN of the chamfered portions located on a vehicle mounting inner side and a total volume SOUT of the chamfered portions located on a vehicle mounting outer side satisfy a relationship SIN>SOUT.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: September 6, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Takayuki Shiraishi, Hiraku Kouda, Tatsuro Shinzawa, Takanori Uemura
  • Patent number: 11427033
    Abstract: A tire having an outer middle land portion demarcated between an outer shoulder circumferential groove and an outer crown circumferential groove and located at an outer side of a vehicle when the tire is mounted on the vehicle, and an inner middle land portion demarcated between an inner shoulder circumferential groove and an inner crown circumferential groove and located at an inner side of the vehicle when the tire is mounted on the vehicle formed in a tread portion. The outer middle land portion has first outer middle sipes extending from the outer crown circumferential groove toward the outer shoulder circumferential groove and terminating within the outer middle land portion. The inner middle land portion has first inner middle sipes extending from the inner shoulder circumferential groove toward the inner crown circumferential groove and terminating within the inner middle land portion.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: August 30, 2022
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Kanako Hamaoka
  • 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
  • Patent number: 11427032
    Abstract: The present invention relates to a tire tread comprising a tread cap comprising at least one tread cap rubber compound, at least three circumferential grooves, wherein at least portions of the sidewalls and the bottom of each of said grooves are formed by a circumferential groove reinforcement, and wherein a first groove reinforcement of a groove laterally next to the equatorial plane of the tire comprises a first reinforcement rubber compound which has a higher hardness than the tread cap rubber compound, and wherein a second groove reinforcement of a groove with a larger lateral distance to the equatorial plane of the tire than the first groove, comprises a second reinforcement rubber compound which has a higher hardness than the tread cap rubber compound and a lower hardness than the second reinforcement rubber compound.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: August 30, 2022
    Assignee: THE GOODYEAR TIRE & RUBBER COMPANY
    Inventors: Claude Schweitzer, Jean-Louis Marie Felicien Thomas, Bodo Ahrens
  • 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: 11400764
    Abstract: A tire includes a tread part including a land portion such that the land portion has a tread surface formed between a first edge extending in a tire circumferential direction and a second edge extending in the tire circumferential direction. The land portion includes long sipes, middle sipes, and short sipes such that each of the long sipes is extending from the first edge to the second edge, that each of the middle sipes is extending from one of the first edge and the second edge and terminating in the land portion at a point beyond a tire axial direction center position of the land portion, and that each of the short sipes is extending from one of the first edge and the second edge and terminating in the land portion without extending to a point beyond the center position.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: August 2, 2022
    Assignee: SUMITOMO RUBBER INDUSTRIES LTD.
    Inventor: Yoshiaki Kanematsu
  • Patent number: 11396210
    Abstract: The invention is directed to a pneumatic vehicle tire having a tread with profile positives which are separated from one another in a circumferential direction by transverse channels which extend continuously from the central region of the tread to the lateral tread edges and which are main channels of the tread and which, at least over the major part of the course thereof, have the maximum provided profile depth. The tread has, as profile positives, two rows of transverse ribs which are of encircling form in the circumferential direction and which are separated from one another by respective transverse channels. The tread is of directional configuration, wherein the transverse ribs of one row, and thus the transverse channels running between the transverse ribs, run, with respect to the axial direction, oppositely in relation to the transverse ribs and transverse channels of the other row.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: July 26, 2022
    Assignee: Continental Reifen Deutschland GmbH
    Inventors: Chun Yi Yeo, Andreas Haertwig, Florian Kristen
  • Patent number: 11390122
    Abstract: A tire has a tread surface, the tread surface including a circumferential groove extending in a tire circumferential direction, a lug groove extending in a direction intersecting the circumferential groove, and a plurality of land parts partitioned by the circumferential groove and the lug groove. A width-direction groove extending in a tire widthwise direction is formed on a land part of the plurality of land parts. An in-groove sipe is arranged along one side edge of a groove bottom of the width-direction groove.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: July 19, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Satoshi Ishikawa, Akihiro Kawakita
  • Patent number: 11376890
    Abstract: A pneumatic tire according to the present embodiment includes a shoulder main groove that is disposed on one side in a width direction from a tire equatorial plane and extends in a tire circumferential direction, a shoulder land portion that is formed between a ground contact end and the shoulder main groove, and a plurality of slits that divide the shoulder land portion into a plurality of blocks in the tire circumferential direction. The shoulder main groove is formed of a zigzag groove in which an inward bent portion and an outward bent portion are alternately and repeatedly disposed, and angles of the slits with respect to the tire width direction are provided to be 10 degrees or less.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: July 5, 2022
    Assignee: TOYO TIRE CORPORATION
    Inventor: Tetsuji Miyazaki
  • Patent number: 11370253
    Abstract: A tire includes a tread portion provided with lateral grooves extending in a tire axial direction and blocks divided by the lateral grooves. At least one of the lateral grooves is provided with a first projected portion with a bottom protruding from a groove bottom of the at least one of the lateral grooves. The first projected portion includes at least one tie-bar portion connecting a pair of blocks with each other which is arranged adjacently through the at least one of the lateral groove, and a narrow rib-portion extending in a longitudinal direction of the at least one of the lateral groove from the at least one tie-bar portion without being connected to the pair of blocks.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: June 28, 2022
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Takafumi Hoshino, Yuya Meguro
  • 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: 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: 11358416
    Abstract: A tire includes a tread portion including at least one land region extending in a tire circumferential direction. The land region is provided with a plurality of axial groove portions curved so as to protrude in one direction in the tire circumferential direction in a plan view. The axial groove portions include first axial groove portions and second axial groove portions having different degree of curvature from the first axial groove portions.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: June 14, 2022
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Takahiro Kimishima
  • Patent number: 11345191
    Abstract: A pneumatic vehicle tire, in particular commercial vehicle tire, having a tread having in each case one shoulder-side profile rib (1) which is separated in each case from a central tread portion (3) by a wide circumferential groove (2) which is made to profile depth (T) and which runs around rectilinearly in the circumferential direction, wherein the circumferential groove (2) has a rounded groove base (8) and is delimited at the profile rib (1) by a rib flank (6).
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: May 31, 2022
    Assignee: Continental Reifen Deutschland GmbH
    Inventors: Paul Naglatzki, Florian Kristen, Christian Meiners, Frank Lippert
  • Patent number: 11345192
    Abstract: It is a tyre 1 provided in a tread portion 2 with blocks 3 having ground contacting surfaces (3a). At least one of the blocks 3 is provided with a chamfered portion 7 formed in such a manner that a corner portion (3k), where a vertical wall surface (3b), a lateral wall surface (3c), and the ground contacting surface (3a) intersect with each other, is cut out obliquely, and a chamfer edge 8 where the chamfered portion 7 and the ground contacting surface (3a) intersect. The chamfered portion 7 is provided with a plurality of first concave portions 9 extending inwardly in a tyre radial direction from the ground contacting surface (3a). The first concave portions 9 have wavy shapes having amplitudes in a longitudinal direction of the chamfer edge 8.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: May 31, 2022
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventor: Koichi Nakajima