Patents by Inventor Daisuke Todoroki

Daisuke Todoroki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220250415
    Abstract: A tire 2 has a nominal aspect ratio of 65% or less. The tire 2 includes a tread 4 and a band 34. The band 34 includes a full band 42 and a pair of edge bands 44 located outward of ends of the full band 42 in a radial direction. A narrow groove 56 is formed on a shoulder land portion 54s of the tread 4. The narrow groove 56 includes an inner groove wall 62u and an outer groove wall 62s. The inner groove wall 62u includes an inner recess portion 64 recessed inward in the axial direction, on a groove bottom side. The outer groove wall 62s includes an outer recess portion 66 recessed outward in the axial direction, on the groove bottom side.
    Type: Application
    Filed: February 4, 2022
    Publication date: August 11, 2022
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daisuke TODOROKI
  • 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: 10894447
    Abstract: In a tire 2 of the present invention, sidewalls 6 each include an outer layer 6a, and an inner layer 6b disposed inward of the outer layer 6a in the axial direction. The inner side end, in the radial direction, of the inner layer 6a extends to a region between a bead 10 and a chafer 8. When Po represents a contact point, on an outer surface of the tire 2, at which the outer layer 6a and the chafer 8 contact with each other, an inner side end, in the radial direction, of the outer layer 6a is equal to the contact point Po. In the radial direction, an outer side end 44 of the chafer 8 is disposed outward of the contact point Po. In the radial direction, an inner side end 46 of the inner layer 6b is disposed inward of the contact point Po.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: January 19, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daisuke Todoroki
  • Patent number: 10857838
    Abstract: In a tire 2 of the present invention, sidewalls 6 each include an outer layer 6a, and an inner layer 6b disposed inward of the outer layer 6a in the axial direction. A loss tangent of the inner layer 6b is less than a loss tangent of the outer layer 6a. When Hr represents a height, in the radial direction, from a bead base line BBL to an outer side end of a rim R, and Hi represents a height, in the radial direction, from the bead base line BBL to an inner side end 46 of the inner layer 6b, a ratio (Hi/Hr) of the height Hi to the height Hr is greater than or equal to 0.0 and not greater than 3.0.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: December 8, 2020
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daisuke Todoroki
  • Patent number: 10195907
    Abstract: A tread portion (2) has a pair of center main grooves (11) extending zigzag and continuously in a tire circumference direction, a pair of shoulder main grooves (12), a center land portion (13), a pair of middle land portions (14), and a pair of shoulder land portions (15). The center main groove (11) has a first groove edge (11a) on the tire equator side and a second groove edge (11b) on the tread edge side. The shoulder main groove (12) has a third groove edge (12a) on the tire equator side and a fourth groove edge (12b) on the tread edge side.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: February 5, 2019
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Masakazu Washizuka, Daisuke Todoroki, Atsushi Maehara
  • Patent number: 9802442
    Abstract: A heavy duty tire has a carcass extending from a tread portion to a bead core in a bead portion through a sidewall portion, and a belt layer disposed on the outside of the carcass in the tire radial direction and on the inside of the tread portion. In a state in which a distance between a pair of bead heels is kept at 110% of a wheel rim width of a standard wheel rim and no inner pressure is applied, the contour shape of the tread portion is formed by a 1st circular arc having a center on the tire equatorial plane, and a pair of 2nd circular arcs, disposed on both outsides of the 1st circular arc in the tire axial direction. The radius of the 2nd circular arc is more than the radius R1 of the 1st circular arc. One 2nd circular arc has the center on the other 2nd circular arc side of the tire equator in the tire axial direction, and the other 2nd circular arc has the center on the one 2nd circular arc side of the tire equator in the tire axial direction.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: October 31, 2017
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Kaori Tanaka, Daisuke Todoroki
  • Patent number: 9796216
    Abstract: A heavy duty tire is disclosed. The distance from the radially outer surface of a belt layer to the tire's inner surface is 15 to 23 mm when measured along a tire radial direction line passing through the bottom of a shoulder main groove. The width of the shoulder main groove is more than the width of a center main groove. The ratio Wc:Wm:Ws of the average width Wc of a center land portion, the average width Wm of a middle land portion, and the average width Ws of a shoulder land portion is 1.00:1.00 to 1.08:1.03 to 1.13. The middle land portion is provided with a plurality of middle axial grooves. The shoulder land portion is provided with a plurality of shoulder axial grooves. The width of the shoulder axial groove is more than the width of the middle axial groove. The angle ?s of the shoulder axial groove is more than the angle ?m of the middle axial groove with respect to the tire axial direction.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: October 24, 2017
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daisuke Todoroki
  • Publication number: 20170217257
    Abstract: In a tire 2 of the present invention, sidewalls 6 each include an outer layer 6a, and an inner layer 6b disposed inward of the outer layer 6a in the axial direction. A loss tangent of the inner layer 6b is less than a loss tangent of the outer layer 6a. When Hr represents a height, in the radial direction, from a bead base line BBL to an outer side end of a rim R, and Hi represents a height, in the radial direction, from the bead base line BBL to an inner side end 46 of the inner layer 6b, a ratio (Hi/Hr) of the height Hi to the height Hr is greater than or equal to 0.0 and not greater than 3.0.
    Type: Application
    Filed: January 6, 2017
    Publication date: August 3, 2017
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daisuke TODOROKI
  • Publication number: 20170217258
    Abstract: In a tire 2 of the present invention, sidewalls 6 each include an outer layer 6a, and an inner layer 6b disposed inward of the outer layer 6a in the axial direction. The inner side end, in the radial direction, of the inner layer 6a extends to a region between a bead 10 and a chafer 8. When Po represents a contact point, on an outer surface of the tire 2, at which the outer layer 6a and the chafer 8 contact with each other, an inner side end, in the radial direction, of the outer layer 6a is equal to the contact point Po. In the radial direction, an outer side end 44 of the chafer 8 is disposed outward of the contact point Po. In the radial direction, an inner side end 46 of the inner layer 6b is disposed inward of the contact point Po.
    Type: Application
    Filed: January 10, 2017
    Publication date: August 3, 2017
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daisuke TODOROKI
  • Publication number: 20170166012
    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: Application
    Filed: November 29, 2016
    Publication date: June 15, 2017
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daisuke TODOROKI
  • Publication number: 20160159158
    Abstract: A tread portion (2) has a pair of center main grooves (11) extending zigzag and continuously in a tire circumference direction, a pair of shoulder main grooves (12), a center land portion (13), a pair of middle land portions (14), and a pair of shoulder land portions (15). The center main groove (11) has a first groove edge (11a) on the tire equator side and a second groove edge (11b) on the tread edge side. The shoulder main groove (12) has a third groove edge (12a) on the tire equator side and a fourth groove edge (12b) on the tread edge side.
    Type: Application
    Filed: July 14, 2014
    Publication date: June 9, 2016
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Masakazu WASHIZUKA, Daisuke TODOROKI, Atsushi MAEHARA
  • Patent number: 9193219
    Abstract: A heavy-duty pneumatic tire includes a carcass including a carcass ply extending from a tread portion through a sidewall portion and turned up around a bead core of a bead portion. The bead core includes a radially inner surface extending along a bottom surface of the bead portion in the radial direction of the tire. Under both conditions that include an unloaded standard condition where the tire is mounted on a standard rim and inflated to regular internal pressure and a loaded standard condition where the tire in the unloaded standard condition above is loaded with a regular load and grounded at a camber angle of 0 degrees, the tire has an angle between the radially inner surface of the bead core and a rim sheet surface of the standard rim being in a range of 0 plus/minus 3 degrees.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: November 24, 2015
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Daisuke Todoroki, Atsushi Maehara
  • Publication number: 20150174965
    Abstract: A heavy duty tire has a carcass extending from a tread portion to a bead core in a bead portion through a sidewall portion, and a belt layer disposed on the outside of the carcass in the tire radial direction and on the inside of the tread portion. In a state in which a distance between a pair of bead heels is kept at 110% of a wheel rim width of a standard wheel rim and no inner pressure is applied, the contour shape of the tread portion is formed by a 1st circular arc having a center on the tire equatorial plane, and a pair of 2nd circular arcs, disposed on both outsides of the 1st circular arc in the tire axial direction. The radius of the 2nd circular arc is more than the radius R1 of the 1st circular arc. One 2nd circular arc has the center on the other 2nd circular arc side of the tire equator in the tire axial direction, and the other 2nd circular arc has the center on the one 2nd circular arc side of the tire equator in the tire axial direction.
    Type: Application
    Filed: December 3, 2014
    Publication date: June 25, 2015
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Kaori TANAKA, Daisuke TODOROKI
  • Publication number: 20150174966
    Abstract: A heavy duty tire is disclosed. The distance from the radially outer surface of a belt layer to the tire's inner surface is 15 to 23 mm when measured along a tire radial direction line passing through the bottom of a shoulder main groove. The width of the shoulder main groove is more than the width of a center main groove. The ratio Wc:Wm:Ws of the average width Wc of a center land portion, the average width Wm of a middle land portion, and the average width Ws of a shoulder land portion is 1.00:1.00 to 1.08:1.03 to 1.13. The middle land portion is provided with a plurality of middle axial grooves. The shoulder land portion is provided with a plurality of shoulder axial grooves. The width of the shoulder axial groove is more than the width of the middle axial groove. The angle ?s of the shoulder axial groove is more than the angle ?m of the middle axial groove with respect to the tire axial direction.
    Type: Application
    Filed: November 26, 2014
    Publication date: June 25, 2015
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daisuke TODOROKI
  • Publication number: 20130139943
    Abstract: A heavy-duty pneumatic tire includes a carcass including a carcass ply extending from a tread portion through a sidewall portion and turned up around a bead core of a bead portion. The bead core includes a radially inner surface extending along a bottom surface of the bead portion in the radial direction of the tire. Under both conditions that include an unloaded standard condition where the tire is mounted on a standard rim and inflated to regular internal pressure and a loaded standard condition where the tire in the unloaded standard condition above is loaded with a regular load and grounded at a camber angle of 0 degrees, the tire has an angle between the radially inner surface of the bead core and a rim sheet surface of the standard rim being in a range of 0 plus/minus 3 degrees.
    Type: Application
    Filed: September 7, 2011
    Publication date: June 6, 2013
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Daisuke Todoroki, Atsushi Maehara