Tire Characterized By The Dimension Or Profile Of The Cross Sectional Shape Patents (Class 152/454)
  • Patent number: 11453241
    Abstract: A pneumatic tire comprises a carcass ply extending between bead portions through a tread portion and sidewall portions, and turned up around a bead core from the inside to the outside of the tire in each of the bead portions, so as to form a pair of turnup portions and a main portion therebetween. In each the bead portion, a first apex rubber and a second apex rubber are disposed. The first apex rubber is disposed between the turnup portion and the main portion. The second apex rubber is disposed axially outside the turnup portion. A complex elastic modulus b of the second apex rubber is larger than that of the first apex rubber. The cross-sectional width Wt in mm of the tire and the outer diameter Dt in mm of the tire satisfy the following conditions Dt=<59.078×Wt0.498 and Dt>=59.078×Wt0.460.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: September 27, 2022
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Shigeki Nishijima
  • Patent number: 11338623
    Abstract: A ply of a carcass of a pneumatic radial tire includes a turn-up ply and a down ply. The turn-up ply includes: a main body portion disposed between a pair of bead cores; turn-up portions around the bead cores from an inside toward an outside in a tire width direction. The down ply extends up to an inside in a radial direction of the bead cores so as to cover the turn-up ply including the turn-up portions from an outside. A curvature is formed at either one of a down ply predetermined portion of the down ply, which covers a turn-up end portion of the turn-up portion of the down ply from an outside in the tire width direction, and a turn-up ply portion that covers the turn-up end portion of the turn-up portion in the main body portion of the turn-up ply from inside in the tire width direction.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: May 24, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Takahiro Tobe
  • Patent number: 11331960
    Abstract: Of layers configuring a bead core of a pneumatic tire, the width W0 of one of the layers including the greatest number of rows, the width W1, W2 of other of the layers located respectively innermost and outermost in the radial direction satisfy W1>W2 and W2?0.5×W0. The position of width W0 is inward in the radial direction of the center of the bead core. A carcass is folded and curved along the bead core and extends toward sidewalls where a folded back portion of the carcass contacts a body of the carcass. A rubber occupancy ratio in a closed region formed by the body and the folded back portion is 0.1% to 15%. The cross-sectional area S2 and hardness H2 of a filler outward of the carcass in the lateral direction, and the cross-sectional area S1 and the hardness H1 of the side reinforcing layer satisfy 0.12?(S2×H2)/(S1×H1)?0.50.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: May 17, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Atsushi Tanno, Hiraku Kouda, Jun Matsuda, Masaaki Nagayasu, Yuki Sasaya, Ryohei Takemori
  • Patent number: 11325429
    Abstract: A tire has a tire center in the tire width direction. An intersection point of a carcass outer surface with a parallel line extending parallel with a rotation axis and passing through a tire maximum width position is denoted as P1. An intersection point of the parallel line LP with a side surface is denoted as P2. An intersection point of the parallel line with a protrusion portion outer surface of a protrusion portion is denoted as P3. A distance between the tire center and the intersection point P1 is denoted as W1. A distance between the tire center and the intersection point P3 is denoted as W3. A distance between the intersection point P1 and the intersection point P2 is denoted as G1. A distance between the intersection point P2 and the intersection point P3 is denoted as G2. 0.80?W1/W3?0.95 and 0.1?G1/G2?1.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: May 10, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Masatoshi Kuriyama
  • Patent number: 11279180
    Abstract: When (I) a tyre 1 is in contact with a flat surface (S) with a camber angle ? of 40 degrees, (II) a load (F) applied to the tyre is increased from zero, and (III) a curve (T) is obtained by plotting, in a XY coordinate, a displacement (?x) in a tyre axial direction and a displacement (?y) in a tyre radial direction of a position (A) of one of tyre tread edges (Te) closer to the flat surface (S), the displacements being from a reference position (A0) when the load (F) is zero, inclination of the curve (T) increases as the load (F) increases at least in a range where the load (F) is not more than 78% of a maximum load capacity load of the tyre.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: March 22, 2022
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventor: Ryota Sato
  • Patent number: 11260702
    Abstract: In a cross-section of a pneumatic tire, a contour of the bead core is a polygon formed by tangent lines of circumferential portions of a bead wire, the contour includes a vertex with an acute angle and a bottom side opposite the vertex, the carcass layer is folded back along a circumference of the bead core in a bead portion, a folded back portion of the carcass layer from an outer end of the bead core extends in the radial direction, and a distance in the radial direction between a center of an arc profile of a tire outer surface and a straight line extending in the lateral direction through the vertex is within 20% of a radius r of the arc, and a distance in the lateral direction between the center of the arc and a straight line extending in the radial direction through the vertex is within 2r±0.4r.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: March 1, 2022
    Inventors: Yuki Sasaya, Masaaki Nagayasu, Ryohei Takemori, Atsushi Tanno, Hiraku Kouda, Jun Matsuda
  • Patent number: 11220141
    Abstract: A pneumatic tyre includes a carcass extending between bead cores disposed in respective bead portions through a tread portion and sidewall portions, and bead apex rubbers each extending radially outwardly from the respective bead cores, each bead apex rubber having an inner side surface in a tyre axial direction. In a tyre cross-section under a standard inflated state, a ratio h1/H of a carcass-maximum-width height h1 to a carcass-maximum height H is equal to or less than 50%, and in at least one bead portion, an angle of a tangent line touching the inner surface of the bead apex rubber at an intersection of a tyre radial reference line passing a rim-width location of the standard wheel with the inner side surface of the bead apex rubber is in a range of from 55 to 75 degrees to the tyre radial reference line.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: January 11, 2022
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Shintaro Tomita
  • Patent number: 11220140
    Abstract: A pneumatic tire has a non-stretchable tread (30) flanked by two shoulder regions (34), and two non-stretchable bead regions (36) for mounting the tire to a wheel, each bead region being connected via a sidewall to the corresponding bead region. Each sidewall has a first portion (38) extending inwardly relative to a width of the tire from one of the bead regions (36) to a deflection region (40), and a second portion (42) extending outwardly relative to the width of the tire from the deflection region (40) to a corresponding one of the shoulder regions (34). A non-stretchable girth-limiting configuration (44, 46, 56) and a radial reinforcing structure (48, 50, 52) are associated with the first portion (38) of each of the sidewalls, thereby limiting radial flexing of first portion (38) and maintaining an annular concavity between the bead region (36) and the shoulder region (34).
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: January 11, 2022
    Assignee: GALILEO WHEEL LTD.
    Inventors: Avishay Novoplanski, Lucy Edery Azulay
  • Patent number: 11207929
    Abstract: A pneumatic tire mountable on a 15° tapered specified rim includes a bead core, a carcass, a steel cord reinforcing layer, a bead rubber layer, and a first reinforcing rubber layer. A distance from a second line segment to a third line segment is from 4 mm to 12 mm, a complex modulus of the first reinforcing rubber layer is from 6 MPa to 10 MPa, an elongation at break of the first reinforcing rubber layer is from 300% to 450%, a complex modulus of the second reinforcing rubber layer is from 10 MPa to 15 MPa, and a complex modulus of a shock absorbing rubber layer is from 2 MPa to 6 MPa.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: December 28, 2021
    Inventor: Koji Nishio
  • Patent number: 11203232
    Abstract: A radial tire for an aircraft, the radial tire having a rim diameter of 20 inches or less includes a pair of bead portions; a pair of sidewall portions extending outward from the bead portions in a substantially radial direction; a tread portion that couples together respective radial outer ends of the sidewall portions; a toroidal carcass layer reinforcing a portion between bead cores embedded in the bead portions; a belt layer and a tread that are sequentially laminated on an outer side of the carcass layer in the radial direction, wherein a value M obtained by dividing a tire external diameter D by a distance L between bead heels of the bead portions is in a range of from 4.1 to 5.4.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: December 21, 2021
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Kenji Hashimoto
  • Patent number: 11198329
    Abstract: A heavy-duty tire includes a tread portion including a crown land portion, a shoulder land portion with a tread edge and a middle land portion disposed therebetween. In a tire cross-section of a 5% inflated state, the tread portion comprises a surface profile which comprises an inner arc portion having a radius (R1) of curvature with a center located in a tire equatorial plane and an outer arc portion having a radius (R2) of curvature smaller than the radius (R1) of curvature of the inner arc portion and intersecting the inner arc portion at an inflection point (P). The inflection point (P) is located on the middle land portion, wherein a distance (Lp) in the tire axial direction from the tire equatorial plane to the inflection point (P) is in a range of from 0.35 to 0.50 times a tread half-width (Wt).
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: December 14, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Atsushi Maehara
  • Patent number: 11198333
    Abstract: In a tire 2, each of sidewalls 6 includes a first layer 36 disposed axially outward of a corresponding one of beads 8, and a second layer 38 extending outward from the first layer 36 in a radial direction. When Pc represents a position of an axially outer end of an interface between a carcass 10 and the sidewall 6, an outer end 40 of the first layer 36 is disposed radially inward of the position Pc. A hardness H1 of the first layer 36 is greater than a hardness H2 of the second layer 38. A ratio (H2/H1) of the hardness H2 to the hardness H1 is preferably not less than 0.70 and preferably not greater than 0.95.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: December 14, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Masafumi Otani
  • Patent number: 11173755
    Abstract: A flexible adapter (1) for a rolling assembly, said rolling assembly comprising a tyre (2) having two beads (21), a rim (3) and two adapters (1) each intended to ensure the joint between one of the beads (21) and the rim (3), said rim (3) having two rim seats (31) each extended axially outwards by a rim flange (32), the rim seat having a diameter D3, the adapter comprising an axially outer end (11) and a body (12) oriented substantially axially and disposed between said axially outer end (11) and said axially inner end (10), said body (12) having a radially outer face (121) and a radially inner face (122), having the intersection between the shoulder (111) of the axially outer end (11) of the adapter (1) and the substantially tapered face of said adapter seat (13) forming a circle of diameter D1, said adapter seat (13) having a substantially tapered face of angle ?, in which the difference “d” between the diameters D1 and D3, d=D1?D3, lies between 25.9 mm and 30.4 mm and the angle ? is greater than 0.5°.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: November 16, 2021
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Jose Merino, Michel Ahouanto, Luc Bestgen, Henri Hinc, Jacky Pineau, Arthur Topin
  • Patent number: 11077715
    Abstract: A heavy-duty tire includes a tread portion including a pair of tread edges and a tire equator located therebetween. In a tire cross-section including a tire axis under a 5% inner pressure condition where the tire is mounted on a standard wheel rim with 5% of a standard pressure but loaded with no tire load, the tread portion has a profile which includes a first profile including the tire equator, a pair of second profiles extending axially inwardly from the tread edges and a pair of third profiles connecting the first profile and the respective second profiles. The first profile and the second profiles are configured as arc shapes protruding outwardly in a tire radial direction, and the third profiles are configured as straight shapes.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: August 3, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Hana Sato
  • Patent number: 11077714
    Abstract: A tire includes a tread portion provided with a tread profile which is curved in an arcuate shape in a tire meridian section so that the tread portion includes a crown region contacting with the ground during straight running, and a pair of shoulder regions contacting with the ground during cornering by leaning the tire at a certain camber angle. The crown region has a land ratio of not less than 98%, and the shoulder regions have a land ratio of from 85% to 93%. A three-wheeled vehicle has a pair of front wheels and a single rear wheel on which the tire is mounted.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: August 3, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Toshiyuki Matsunami, Yumiko Yoshida, Satoshi Matsunaga
  • Patent number: 11040581
    Abstract: In a tire 2, chafers 8 each extend from a position axially outward of a corresponding one of beads 10 to a position radially inward of the corresponding one of the beads 10. Sidewalls 6 extend to positions between the beads 10 and the chafers 8, respectively. The chafers 8 extend to positions outward of ends 38 of turned-up portions 44 of a carcass ply 40 in the radial direction. When a side surface 50 represents a portion, of an outer surface of each chafer 8, which contacts with a flange of a rim, an outline of the side surface 50 has an arc C that extends from a heel of the bead 10 portion and projects inward.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: June 22, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Kenichiro Tanada
  • Patent number: 10953703
    Abstract: A motorcycle tire comprises bead portions each having an axially outer surface provided with a profile which comprises a radially inner portion and a radially outer portion. The radially inner portion is located axially outward of a bead core and extending substantially linearly in the tire radial direction. The radially outer portion is smoothly continued from the radially inner portion and extends radially outwardly to a sidewall portion, while inclining toward the axially outside. When an axial width between the bead portions is adjusted to coincide with a rim width between rim flanges, and an axial center of the axial width coincides with an axial center of the rim width, and further the tire rotational axis coincides with the rotational axis of the wheel rim, then at least a part of the radially outer portion of the profile protrudes axially outwardly from a profile of the inner surface of the rim flange.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: March 23, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Yohei Maeda
  • Patent number: 10946702
    Abstract: A rim guard of a tire has a top, an inner surface, and an outer surface. A contour of the inner surface is represented by a circular arc, and the circular arc has a radius of not less than 20 mm and not greater than 30 mm. A contour of the outer surface is represented by a circular arc, and the circular arc has a radius of not less than 100 mm and not greater than 500 mm. In a radial direction, a position of an outer edge of the outer surface coincides with a cross-sectional width specified position, or the outer edge of the outer surface is located outward of the cross-sectional width specified position.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: March 16, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Ryuhei Sanae, Yoshiaki Kanematsu, Shintaro Tomita, Daisuke Kudo
  • Patent number: 10946701
    Abstract: A heavy-duty tire includes a tire sidewall (K) provided on a surface (Ks) thereof with a belt-like shaped serration extending in a tire circumferential direction. The serration is formed of a plurality of radially extending ridges arranged adjacently in the tire circumferential direction.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: March 16, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Shuji Kagimoto
  • Patent number: 10946700
    Abstract: A heavy duty pneumatic tire includes a tread, a pair of side walls, and a belt. The tread includes a base layer and a cap layer on the base layer such that boundary between the base layer and the cap layer is exposed on the side surfaces of the tread and the boundary on the side surfaces is on radial direction inner side of the edges of the side walls, and the tread is formed such that when an imaginary line passing through edge of the belt and extending in axial direction is set and a portion of the imaginary line intersecting the tread is a line segment AL, a ratio of width of the base layer in width of the tread is 70% or more where the width of the tread is length of the segment AL, and the base layer has a loss tangent of 0.06 or less.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: March 16, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daisuke Todoroki
  • Patent number: 10946699
    Abstract: In a tire 2 for a two-wheeled automotive vehicle, a carcass ply 24 is extended on and between one bead 8 and the other bead 8 along inner sides of a tread 4 and sidewalls 6, and includes a main portion 24a and turn-up portions 24b, which are formed by the carcass ply 24 being turned up around the beads 8 from an inner side toward an outer side in an axial direction. An outer end Pp of each turn-up portion 24b is positioned outward of a tread end Pe in a radial direction. A band 14 is positioned between a belt 12 and the tread 4, such that the band 14 covers the belt 12. An outer end P1 of an inner layer 28 layered over a carcass 10 and the outer end Pp of the turn-up portion 24b are positioned facing each other.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: March 16, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Tomoki Kato
  • Patent number: 10940720
    Abstract: A tire 1 for motorcycles comprises a carcass 6, a belt layer 7, and a tread rubber 2G. The belt layer 7 includes at least one reinforcing cord coated with rubber and spirally wound. In a meridian section passing through a tire rotational axis of the tire 1 in a standard state, a width BW of the belt layer 7 in a tire axial direction is in a range of from 60% to 80% of a tread width TW. The tread rubber 2G has a thickness at a tire equator (C) in a range of from 70% to 90% of thickness at tread edges (2t).
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: March 9, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Kazuya Shirakami
  • Patent number: 10933695
    Abstract: A tire includes a carcass ply, two beads, two sidewalls, and a crown reinforcing zone. The carcass ply connects the two beads by way of the two sidewalls. The crown reinforcing zone is positioned radially external to the carcass ply. The crown reinforcing zone includes a plurality of reinforcing strips disposed in at least two layers. The reinforcing strips are coated in an elastomeric composition. A mean overlap between the reinforcing strips of the two layers is greater than 40%. The reinforcing strips are made of a thermoplastic film having a modulus greater than 0.9 GPa, and preferably greater than 2 GPa, in a main direction and in a transverse direction.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: March 2, 2021
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Augustin Bosquet, Jacky Pineau, Thomas Guy, Christophe Le Clerc, Anne-Lise Thuilliez
  • Patent number: 10926584
    Abstract: A pneumatic tire includes, in a tread portion, a belt layer including a circumferential belt layer with a belt cord disposed along a circumferential direction; and belt plies having a larger lateral direction dimension than a lateral direction dimension of the circumferential belt layer. A gauge from a surface of the tread portion to the belt layer is equal on a vehicle outer side and a vehicle inner side where the circumferential belt layer is disposed. At positions located away from a tire equatorial plane toward the vehicle outer side and the vehicle inner side by 120% of half of the lateral direction dimension of the circumferential belt layer, a gauge H1out on the vehicle outer side and a gauge H1in on the vehicle inner side to a belt ply of the belt plies located outermost in a radial direction satisfy 1 mm?H1in?H1out?3 mm.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: February 23, 2021
    Inventor: Takayuki Suzuki
  • Patent number: 10894444
    Abstract: In a tire 2, a band 14 has a helically wound structure in which a strip 26 having a cord 28 is wound in a circumferential direction. The band 14 includes a center portion C disposed at a center in an axial direction, and a shoulder portion S disposed outward of the center portion C in the axial direction. A pitch Pc of the strip 26 in the center portion C is not less than 2.0 times a width W of the strip 26 and not greater than 2.5 times the width W. A pitch Ps of the strip 26 in the shoulder portion S is not less than 0.8 times the width W of the strip 26 and not greater than 1.2 times the width W.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: January 19, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES LTD.
    Inventor: Yu Mukai
  • Patent number: 10882364
    Abstract: A tire having a central axis and a radius further includes a circumferential tread having a convex cross-section. The convex cross-section is defined by a radius that is less than a maximum radius of the tire. A pair of sidewalls extends from opposite sides of the circumferential tread. Each of the pair of sidewalls has a concave cross-section that is defined by a radius that is greater than a maximum radius of the convex cross-section of the circumferential tread.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: January 5, 2021
    Assignee: Bridgestone Americas Tire Operations, LLC
    Inventors: Sharon E. Reinhardt, William H. Durivage
  • Patent number: 10780747
    Abstract: Provided is a tire structure capable of being combined with a rim, and the tire structure includes an air tube, a core provided on the air tube, and a tire outer layer provided on the core, and the core includes a body part positioned above a transverse diameter of the air tube and a wing part positioned under the transverse diameter of the air tube, and a lower end of the wing part is placed under an upper surface of the rim.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: September 22, 2020
    Inventor: Young Gi Lee
  • Patent number: 10538131
    Abstract: When a tire that is mounted on a specified rim, inflated to an internal pressure of 50 kPa, and placed in a no-load state is viewed as a cross-section from the tire meridian direction, a position of 1.30×Hf on an outer surface of a sidewall portion, taking a rim flange height (Hf) of the specified rim as a reference, is defined as a point (P), a foot of a normal line (L) drawn from the point (P) to a carcass line of a main body portion (131) of a carcass layer (13) is defined as a point (M), and a point of intersection of the normal line (L) and a carcass line of a folded back portion (132) of the carcass layer (13) is defined as a point (T). At this time, a distance (a) mm from the point (M) to the point (T), a distance (b) mm from the point (T) to the point (P), and a specified load (x) kN have relationships such that a=0.019×x+13.3 and b=0.052×x+21.6, with a tolerance of not less than 0% and not more than 20%.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: January 21, 2020
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Lisa Tauchi, Satoru Isobe
  • Patent number: 10518586
    Abstract: A pneumatic tire includes a carcass, a tread portion and a belt layer having a first inclined belt ply, circumferential direction belt ply, and second inclined belt ply. Ground contact edge side belt plies extend from tire width direction end portions of the second inclined belt ply toward tire width direction outsides, at a tire radial direction outside of the carcass. With respect to a tire circumferential direction, an angle of cords of the first inclined belt ply is from 45° to 60°, an angle of a cord of the circumferential direction belt ply is 5° or less, an angle of cords of the second inclined belt ply is from 30° to 60°, and an angle of cords of the ground contact edge side belt plies exceeds 5° and is 30° or less. A distance dimension of the ground contact edge side belt plies is 80% or more of a ground contact width.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: December 31, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Yosuke Mori
  • Patent number: 10500896
    Abstract: A wheel assembly comprising a wheel disk and a tread member disposed around the wheel disk. The wheel disk can have a substantially conical shape when in an unloaded state, but be flexible such that it can deform under load to optimize and/or maximize contact area between the tread member and a driving surface.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: December 10, 2019
    Inventor: Paul Catalano
  • Patent number: 10449803
    Abstract: Provided is a pneumatic tire where a total width (SW) and an outer diameter (OD) satisfy the relationship SW/OD?0.3; an inner diameter (ID) and an outer diameter (OD) satisfy the relationship ID/OD?0.7; as viewed in a tire meridional cross section, an area (X1) (mm2) of a first region (R1) and a periphery length (Y1) (mm) of an inner peripheral surface of the first region (R1) have a ratio X1/Y1 of 12 or greater and 30 or less; and an area X2 (mm2) of a second region (R2) and a periphery length (Y2) (mm) of an inner peripheral surface of the second region (R2) have a ratio X2/Y2 of 10 or greater and 15 or less.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: October 22, 2019
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Yuji Minami
  • Patent number: 10399387
    Abstract: A tire comprises two working crown layers of reinforcing elements and, in each shoulder, an end of a layer of parallel reinforcing elements oriented circumferentially, said end being axially outside the working crown layers. The reinforcing elements have a diameter less than 1 mm and comprise threads with a diameter strictly greater than 0.16 mm, and, in a radial plane, the ratio between the thicknesses of rubber compound between the inner surface of the tire cavity and that point of a metal reinforcing element of the carcass reinforcement that is closest to said inner surface of the cavity, of the two parts of the tire profile that are centered on the respective orthogonal projections onto the inner surface of the tire cavity of the axially outer ends of said additional layers, and of the parts of the tire profile that have the smallest thicknesses, being greater than 1.15.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: September 3, 2019
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventor: Benoît Foucher
  • Patent number: 10399385
    Abstract: Tire comprising a crown reinforcement formed of at least two working crown layers each being formed of reinforcing elements inserted between two skim layers of rubber compound, a first layer S of polymer compound being in contact with at least one working crown layer and in contact with the carcass reinforcement and the crown reinforcement comprising at least one layer of circumferential reinforcing elements. The elastic modulus under tension at 10% elongation of at least one skim layer of at least one working crown layer is greater than 9 MPa, the maximum value of tan(?), denoted tan(?)max, of the at least one skim layer of at least one working crown layer is less than 0.100 and the complex dynamic shear modulus G*, measured at 10% and 60° C. on the return cycle, of the first layer S of polymer compound is greater than 1.35 MPa.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: September 3, 2019
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Hichem Rehab, Jean-François Parmentier
  • Patent number: 10363778
    Abstract: A crown reinforcement formed of at least two working crown layers of reinforcing elements. The tire additionally comprises, in each shoulder, at least one end of a layer of reinforcing elements that are mutually parallel in the layer and are oriented circumferentially, said end being axially outside said at least two working crown layers, the reinforcing elements of the carcass reinforcement having a diameter less than 0.85 mm, and said reinforcing elements of the carcass reinforcement being made up of threads with a diameter less than 0.16 mm.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: July 30, 2019
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventor: Benoît Foucher
  • Patent number: 10343459
    Abstract: [Object] A pneumatic tire that allows reduction of the occurrence of a TGC and, at the same time, allows reduction of rolling resistance, is provided. [Solution] The tire 12 includes a band 26 disposed radially inward of a tread 14, and a belt 24 disposed radially inward of the band 26. The band 26 includes a cord that is helically wound and extends substantially in a circumferential direction. The belt 24 includes an inner layer 24a, and an outer layer 24b that is layered over the inner layer 24a and disposed radially outward of the inner layer 24a. The inner layer 24a and the outer layer 24b each include multiple cords aligned with each other. The cords in the inner layer 24a and the cords in the outer layer 24b are inclined relative to an equator plane. A direction in which the cords in the inner layer 24a are inclined relative to the equator plane is opposite to a direction in which the cords in the outer layer 24b are inclined relative to the equator plane.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: July 9, 2019
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Kazuo Asano, Yasuhiro Kubota
  • Patent number: 10308082
    Abstract: It is a run-flat tire 1 provided with a carcass 6 extending from a tread portion 2 through a sidewall portion 3 to a bead core 5 in a bead portion 4, and a side-reinforcement rubber layer 10 disposed inside the carcass 6 in the sidewall portion 3 and having a substantially crescent-shaped cross-section. In a tire meridian cross section including the tire rotational axis under a normal state such that the tire is mounted on a normal rim, inflated to a normal internal pressure and loaded with no load, the tire inner-cavity surface 11 includes a side inner-cavity surface 12. A distance in the tire radial direction of the side inner-cavity surface 12 from a bead toe 4e of the bead portion 4 is in a range of 0.4 times to 0.9 times the length H in the tire radial direction of the tire inner-cavity surface 11.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: June 4, 2019
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Naoki Sugiyama
  • Patent number: 10266015
    Abstract: Provided is a pneumatic tire including a carcass constituted of at least one ply including a ply main body and ply turn-up portions, and a recessed portion formed to be recessed inward in the tire axial direction at an outer surface of the tire in a region between a rim separating point and the tire maximum width position in each sidewall portion. In a section taken along the tire axial direction in a non-rim assembled state, an angle ? is defined as an angle that an outer surface straight line defined by each bead back face portion passing the first intersection and the second intersection forms with respect to the tire axial direction, and the angle ? is in the range from 70 to 100°.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: April 23, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Kazuto Osaki
  • Patent number: 10252573
    Abstract: A tire, wherein, in a cross section in the tire width direction thereof in a state where the tire has substantially not been inflated with no load applied thereon, provided that the maximum height in the tire radial direction of the carcass is h, a radius of curvature of the carcass within a height range 0.91 h-h measured from the radially innermost position of the carcass is R7, an acute inclination angle specifically defined in the height range 0.91 h-h is ?7, the intermediate value of a radius of curvature in the height range 0.82 h-0.91 h is R6, a radius of curvature in the height range 0.63 h-0.82 h is R5, and an acute inclination angle specifically defined in the height range 0.63 h-0.82 h is ?5, R7?0.26h, ?7?14°, R6<R7, R5>R6, and ?5?23°.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: April 9, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Naoto Okazaki
  • Patent number: 10226969
    Abstract: A circumferential depressed portion extended along a tire circumferential direction is formed on an outer surface of a tire side portion of a pneumatic tire. On a tire cross-sectional plane, a rim-side outer surface formed in a range from a rim separation point to an inner-side end of the circumferential depressed portion along a tire radial direction is formed along a given circular-arc curved line. When a virtual circular-arc curved line drawn by extending the given circular-arc curved line is defined, a depth of the circumferential depressed portion with reference to the virtual circular-arc curved line is not smaller than 5 mm and not larger than 35 mm in a range of not smaller than 22% and not larger than 28% of a tire height from an bead end.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: March 12, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Jyunya Asari
  • Patent number: 10195900
    Abstract: A pneumatic tire includes a carcass extending between bead cores of bead portions through a tread portion. A tire section width Wt (unit: mm) in relation to a bead diameter Db (unit: inch) satisfies the following equations, Wt??0.7257×(Db)2+42.763×Db?339.67, and Wt??0.7257×(Db)2+48.568×Db?552.33. In a tread thickness distribution curve f(y) represented by equation f(y)=1?t(y)/t(0), when y=0.4, the value of f(y) is of from 0.03 to 0.06, and a rate of change of the value of f(y) increases to y=0.4 and decreases thereafter, where t(y) denotes a tread thickness at each tire axial position Py, and y represents a ratio of an axial distance from the tire equatorial plane, to the maximum-width L of the carcass.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: February 5, 2019
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Kazuo Asano, Yasuhiro Kubota
  • Patent number: 10166817
    Abstract: To reduce noise while suppressing increase in rolling resistance, without affecting the formation of a carcass line, provided is a pneumatic tire (10) including: a carcass (13); an inclined belt (14), and an inner liner (17). The inclined belt (14) is disposed on the tire radial outer side of the crown portion of the carcass (13). The inclined belt (14) includes at least one inclined belt layer (16). The inclined belt layer (16) has cords extending as being inclined at 35° or more with respect to the tire circumferential direction. The inner liner (17) has a thickness of 1.5 mm or more at least in part of a side portion (19).
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: January 1, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Isao Kuwayama, Shintaro Hatanaka, Kentaro Kozuki
  • Patent number: 10137738
    Abstract: A tire comprising a crown reinforcement formed of at least two working crown layers of reinforcing elements. The tire additionally comprises, in each shoulder, at least one end of a layer of reinforcing elements that are mutually parallel in the layer and are oriented circumferentially, said end being axially outside said at least two working crown layers, the reinforcing elements of the carcass reinforcement having a diameter less than 1 mm and being made up of threads with a diameter strictly greater than 0.16 mm, and said reinforcing elements of the carcass reinforcement being advantageously non-wrapped metal cords that return a flow rate of less than 20 cm3/min in what is referred to as the permeability test.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: November 27, 2018
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventor: Benoît Foucher
  • Patent number: 10086658
    Abstract: A run-flat tire ensures run-flat durability with a reduced weight. A tire radial outermost carcass ply of two or more carcass plies has tire widthwise inner ends in a crown portion. A bead filler and side reinforcing rubber have an overlapping part in the tire width direction. In a cross section of the run-flat tire in the tire width direction in a state where the run-flat tire is attached to an applicable rim, filled to a specified internal pressure, and placed under no load, a thickness d1 of a sidewall portion at a midpoint in the tire radial direction between a maximum width position of the run-flat tire and a tire radial outermost position of a bead core is greater than a thickness d2 of the sidewall portion at a midpoint in the tire radial direction between the maximum width position of the run-flat tire and a tread edge.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: October 2, 2018
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Young Chul Park
  • Patent number: 10076935
    Abstract: The invention relates to a tire having at least one carcass reinforcement (2) comprising reinforcers, surmounted radially on the outside by a crown reinforcement (3) comprising two axial ends S, itself radially on the inside of a tread (4), said crown reinforcement (3) being made up of at least one layer of reinforcement elements, said tread (4) being connected to two beads (5) by way of two sidewalls (6), said beads (5) being intended to come into contact with a rim flange having a rim flange top C, each bead having at least one circumferential reinforcement element (7) known as a bead wire, said carcass reinforcement (2) comprising an end (8) at each bead (5), the end (8) of the carcass reinforcement (2) being turned up once in an outward radial direction of the tire and about said bead wire, so as to form a turnup, then being folded in the radially outward direction so as to form a fold of the carcass ply (2), said fold forming a radially external end (12a) and three adjacent parts along an axial axis made
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: September 18, 2018
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventor: Hervé Ferigo
  • Patent number: 10071597
    Abstract: [Object] A pneumatic tire 2 that allows achievement of reduction of rolling resistance without taking influence on a mass into consideration, is provided. [Solution] A profile OL of the tire 2 includes a ground-contact surface 46 and a pair of side surfaces 48. In the profile OL, a zone from a point PB to a point PW is formed by three arcs. The arcs are a first arc, a second arc that extends almost outward from the first arc in the radial direction, and a third arc that extends almost outward from the second arc further in the radial direction. A ratio of a radius R2 of curvature of the second arc to a radius R1of curvature of the first arc is greater than or equal to 1.45 and not greater than 3.26. A ratio of a radius R3 of curvature of the third arc to the radius R1 of curvature of the first arc is greater than or equal to 0.45 and not greater than 0.56. Each sidewall 8 of the tire 2 has a first recess 50a and a second recess 50b that are recessed inward from the side surface 48.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: September 11, 2018
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Shintaro Tomita, Susumu Tanaka, Kazuo Asano
  • Patent number: 10005323
    Abstract: The invention relates to a tire having at least one carcass reinforcement comprising reinforcers, surmounted radially on the outside by a crown reinforcement, itself radially on the inside of a tread, said crown reinforcement being made up of at least one layer of reinforcement elements, said tread being connected to two beads by way of two sidewalls, said beads being intended to come into contact with a rim flange having a rim flange top C, each bead having at least one circumferential reinforcement element, said carcass reinforcement comprising an end at each bead, the end of the carcass reinforcement being turned up once in an outward radial direction of the tire and about said bead wire, so as to form a turnup, then being folded in said radially inward direction so as to form a fold forming a radially external end and three adjacent parts along an axial axis made up of a central part, of an axially internal lateral part, and of an axially external lateral part.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: June 26, 2018
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventor: Hervé Ferigo
  • Patent number: 9975385
    Abstract: Tire including: a tread; a pair of sidewalls extending substantially inward radially from ends of the tread; a pair of beads positioned substantially radially inwardly of the sidewalls; and a clinch portion extending from the sidewalls to the beads. A concave curved surface extends on an outer surface of the clinch portion in a circumferential direction. A convex curved surface formed on a radially outer side end of a rim flange is engageable with the concave curved surface. A ratio R1/R of curvature radius R1 of the concave curved surface to a curvature radius R of the convex curved surface of the rim flange satisfies 1.7?R1/R?2.5. The curvature radii R1 and R of the concave and convex curved surfaces, respectively, are each a radius of curvature of an arc on a cross-section taken along a plane including a tire center axis.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: May 22, 2018
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Naoki Sugiyama, Makoto Ohkoshi, Hiroki Takahashi
  • Patent number: 9963000
    Abstract: Provided is a pneumatic tire ensuring conductivity while being reduced in weight, and having good fuel efficiency and handling stability. The tire includes a sidewall and a carcass, the sidewall including a laminate of two or more rubber layers including an inner sidewall layer (1) located closest to the carcass, and an outer sidewall layer (2) constituting an outer surface of the tire; the layer (1) including a rubber composition for (1); the layer (2) including a rubber composition for (2); the carcass including a carcass cord topped with a rubber composition for a carcass cord topping (3); the sidewall having a thickness of 3.0 mm or less; the layer (1) having a thickness of 0.2-1.0 mm; the composition for (1) having a volume resistivity of 5.0×107 ?·cm or less; the compositions for (1) and for (2), and the compositions for (3) and for (1) satisfying specific relations.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: May 8, 2018
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daisuke Sato
  • Patent number: 9956828
    Abstract: A heavy duty pneumatic tire includes a clinch portion extending from the sidewalls to the beads. A concave curved surface extends on an outer surface of the clinch portion in a circumferential direction. A convex curved surface is engageable with the concave curved surface. A ratio R1/R2 of a radius of curvature of the concave curved surface to a radius of curvature of the convex curved surface, satisfies 1.7?R1/R2?3.9, a ratio D1/R2 of a depth of the concave curved surface to the radius of curvature of the convex curved surface satisfies 0.05?D1/R2?0.09, and the radius of curvature R1 of the concave curved surface and the radius of curvature R2 of the convex curved surface are each a radius of curvature of an arc on a cross section as taken along a plane including a center axis of the tire.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: May 1, 2018
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Yukihide Oya
  • Patent number: 9902211
    Abstract: This disclosure aims to achieve reduction in rolling resistance and ensure excellent steering stability. In this disclosure, a tire widthwise maximum width of a carcass is 1.35 W or less; a tire outer surface has a recess; within a second height range h2 and on the outer side in a tire radial direction with respect to bead cores, a radius of curvature of the carcass is 0.46 h or more; within a third height range h3, the radius of curvature of the carcass is 0.62 h or more; during movement of a virtual point from a bead core height position Hbc toward a third height position H3, a tire gauge at the virtual point is reduced by a reduction amount of 0.025×G0/mm or less; and the tire gauge at the virtual point at the third height position H3 is 10% or more of the tire widthwise maximum width of the bead core.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: February 27, 2018
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Naoto Okazaki