Patents by Inventor Shintaro Tomita
Shintaro Tomita 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).
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Patent number: 11446962Abstract: A tire comprises a tread portion provided with at least one main groove extending continuously in the tire circumferential direction to axially divide the tread portion into land portions. The land portion is provided with axial grooves extending thereacross in the tire axial direction, and each comprising a radially outer portion and a radially inner portion which is wider than the radially outer portion. The radially outer portion of each of the axial grooves is crossed by one ore more sipes.Type: GrantFiled: December 20, 2018Date of Patent: September 20, 2022Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Shintaro Tomita, Koichi Nakajima
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Patent number: 11220141Abstract: 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: GrantFiled: July 2, 2019Date of Patent: January 11, 2022Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Shintaro Tomita
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Patent number: 10946702Abstract: 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: GrantFiled: December 27, 2018Date of Patent: March 16, 2021Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ryuhei Sanae, Yoshiaki Kanematsu, Shintaro Tomita, Daisuke Kudo
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Patent number: 10870317Abstract: A rim protector 40 of a tire 2 projects from a reference surface 44 of each side piece 38. The rim protector 40 has a first inclined surface 50 and a second inclined surface 52. A profile of the reference surface 44 includes an outer circular arc and an inner circular arc which are tangent to each other at a reference position. A first circular arc of the first inclined surface 50 is tangent to the outer circular arc, and a second circular arc of the second inclined surface 52 is tangent to the inner circular arc. A ratio of a height H relative to a cross-sectional height SH is equal to or greater than 0.27 and equal to or less than 0.34. A projecting length W is equal to or greater than 12 mm and equal to or less than 18 mm.Type: GrantFiled: January 27, 2017Date of Patent: December 22, 2020Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Shintaro Tomita, Daisuke Kudo
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Patent number: 10632798Abstract: Each side piece 40 of a tire 2 includes a rim protector 42. A bob profile representing a contour of the rim protector 42 includes a first circular arc extending outward from a top PT of the rim protector 42, and a second circular arc extending inward from the top PT. A center of the first circular arc is located inward of the bob profile, and a center of the second circular arc is located outward of the bob profile. The side piece 40 includes a side apex 22, and the side apex 22 intersects a normal line LT that is normal to a carcass 12 and passes through the top PT.Type: GrantFiled: October 25, 2017Date of Patent: April 28, 2020Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Shintaro Tomita
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Patent number: 10570282Abstract: According to a tire comprising a CFRP comprising a matrix resin and a carbon fiber, in which the matrix resin comprises a resin component comprising 20 to 80% by mass of an epoxy resin and 20 to 80% by mass of a functional group-modified acrylonitrile butadiene copolymer, it is possible to provide a tire which is lightened while maintaining the strength of a tire with a steel cord and/or a bead wire.Type: GrantFiled: October 27, 2015Date of Patent: February 25, 2020Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yasuo Naito, Shintaro Tomita, Daisuke Kudo
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Publication number: 20200023690Abstract: 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: ApplicationFiled: July 2, 2019Publication date: January 23, 2020Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Shintaro TOMITA
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Publication number: 20190202245Abstract: 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: ApplicationFiled: December 27, 2018Publication date: July 4, 2019Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ryuhei SANAE, Yoshiaki KANEMATSU, Shintaro TOMITA, Daisuke KUDO
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Publication number: 20190184759Abstract: A tire comprises a tread portion provided with at least one main groove extending continuously in the tire circumferential direction to axially divide the tread portion into land portions. The land portion is provided with axial grooves extending thereacross in the tire axial direction, and each comprising a radially outer portion and a radially inner portion which is wider than the radially outer portion. The radially outer portion of each of the axial grooves is crossed by one ore more sipes.Type: ApplicationFiled: December 20, 2018Publication date: June 20, 2019Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Shintaro TOMITA, Koichi NAKAJIMA
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Publication number: 20190135051Abstract: A pneumatic tire includes a carcass includes at least one carcass ply of cords extending between bead cores of bead portions through a tread portion and sidewall portions, wherein both ends of the carcass ply are turned up around the respective bead cores, and a pair of bead apex rubbers each extending radially outwardly to a radially outer end from a radially inner surface that is connected to the respective bead cores. In a tire meridian cross-section under a standard inflated state, in each of the bead portions, an angle of a bead reference line that passes an axially center point of the inner surface of the bead apex rubber and the radially outer end of the bead apex rubber is in a range of from 28 to 35 degrees with respect to a tire radial line.Type: ApplicationFiled: October 25, 2018Publication date: May 9, 2019Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Shintaro TOMITA, Kazuo ASANO
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Patent number: 10155417Abstract: A pneumatic tire excellent in resistance to uneven wear, and crack resistance of a groove is provided. A position, on an equator plane, of a tread surface 20 of a tire 2 is represented as a point Pc. A position, at a maximum width, of an axially outer side surface 6a of a sidewall 6 is represented as a point Pe. A position that is a mid-point, in the radial direction, between the point Pc and the point Pe, and that is on the axially outer side surface 6a, is represented as a point Pd. When an internal pressure is enhanced from an internal pressure that is 0.05 times a normal internal pressure P to the normal internal pressure P, a value Fs of difference in amount of protrusion between an amount of protrusion Dd (mm) at the point Pd and an amount of protrusion De (mm) at the point Pe is calculated according to mathematical expression (1) in which a nominal width is represented as W (mm). The value Fs of difference in amount of protrusion is greater than ?0.4 and less than 0.5.Type: GrantFiled: January 18, 2013Date of Patent: December 18, 2018Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuo Asano, Shintaro Tomita, Susumu Tanaka
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Patent number: 10071597Abstract: [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: GrantFiled: August 27, 2014Date of Patent: September 11, 2018Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Shintaro Tomita, Susumu Tanaka, Kazuo Asano
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Patent number: 10052916Abstract: In a tire 2, a difference Fs (((Dd?De)/W)×100) in an amount of protrusion is greater than ?0.4 and less than 0.5. A sum Fa (((Dd+De)/W)×100) of amounts of protrusions for a sidewall 6 satisfies mathematical expressions (3) and (4) in which an aspect ratio A is used, and a difference Gs (((Da?Dh)/W)×100) in an amount of protrusion for a tread 4 satisfies mathematical expressions (6) and (7). 0.02626×A?1.8615<Fa??(3) Fa<0.02626×A?0.6615??(4) ?0.010819×A?0.084658<Gs??(6) Gs<?0.010819×A+0.Type: GrantFiled: May 15, 2014Date of Patent: August 21, 2018Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuo Asano, Shintaro Tomita, Susumu Tanaka
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Publication number: 20180111425Abstract: Each side piece 40 of a tire 2 includes a rim protector 42. A bob profile representing a contour of the rim protector 42 includes a first circular arc extending outward from a top PT of the rim protector 42, and a second circular arc extending inward from the top PT. A center of the first circular arc is located inward of the bob profile, and a center of the second circular arc is located outward of the bob profile. The side piece 40 includes a side apex 22, and the side apex 22 intersects a normal line LT that is normal to a carcass 12 and passes through the top PT.Type: ApplicationFiled: October 25, 2017Publication date: April 26, 2018Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Shintaro TOMITA
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Patent number: 9902200Abstract: In an internal pressure state where an internal pressure that is 0.05 times a normal internal pressure P has been increased to the normal internal pressure P, amounts of protrusions at points Pa, Ph, Pd, and Pe are represented as Da (mm), Dh (mm), Dd (mm), and De (mm), respectively. A sum Fa (((Dd+De)/W)×100) of the amounts of protrusions for each sidewall 6 satisfies mathematical expressions (2) and (3) in which an aspect ratio A is used, and a difference Gs (((Da?Dh)/W)×100) in the amount of protrusion for a tread 4 satisfies mathematical expressions (5) and (6). 0.02626×A?1.8615<Fa??(2) Fa<0.02626×A?0.6615??(3) ?0.010819×A?0.084658<Gs??(5) Gs<?0.010819×A+0.6713??(6).Type: GrantFiled: February 6, 2014Date of Patent: February 27, 2018Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuo Asano, Shintaro Tomita
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Publication number: 20180022911Abstract: According to a tire comprising a CFRP comprising a matrix resin and a carbon fiber, in which the matrix resin comprises a resin component comprising 20 to 80% by mass of an epoxy resin and 20 to 80% by mass of a functional group-modified acrylonitrile butadiene copolymer, it is possible to provide a tire which is lightened while maintaining the strength of a tire with a steel cord and/or a bead wire.Type: ApplicationFiled: October 27, 2015Publication date: January 25, 2018Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yasuo NAITO, Shintaro TOMITA, Daisuke KUDO
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Publication number: 20170225522Abstract: A rim protector 40 of a tire 2 projects from a reference surface 44 of each side piece 38. The rim protector 40 has a first inclined surface 50 and a second inclined surface 52. A profile of the reference surface 44 includes an outer circular arc and an inner circular arc which are tangent to each other at a reference position. A first circular arc of the first inclined surface 50 is tangent to the outer circular arc, and a second circular arc of the second inclined surface 52 is tangent to the inner circular arc. A ratio of a height H relative to a cross-sectional height SH is equal to or greater than 0.27 and equal to or less than 0.34. A projecting length W is equal to or greater than 12 mm and equal to or less than 18 mm.Type: ApplicationFiled: January 27, 2017Publication date: August 10, 2017Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Shintaro Tomita, Daisuke Kudo
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Publication number: 20160200142Abstract: [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 R1 of 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: ApplicationFiled: August 27, 2014Publication date: July 14, 2016Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Shintaro TOMITA, Susumu TANAKA, Kazuo ASANO
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Publication number: 20160082775Abstract: In a tire 2, a difference Fs (((Dd?De)/W)×100) in an amount of protrusion is greater than ?0.4 and less than 0.5. A sum Fa (((Dd+De)/W)×100) of amounts of protrusions for a sidewall 6 satisfies mathematical expressions (3) and (4) in which an aspect ratio A is used, and a difference Gs (((Da?Dh)/W)×100) in an amount of protrusion for a tread 4 satisfies mathematical expressions (6) and (7). 0.02626×A?1.8615<Fa??(3) Fa<0.02626×A?0.6615??(4) ?0.010819×A?0.084658<Gs??(6) Gs<?0.010819×A+0.Type: ApplicationFiled: May 15, 2014Publication date: March 24, 2016Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuo ASANO, Shintaro TOMITA, Susumu TANAKA
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Publication number: 20160009138Abstract: In an internal pressure state where an internal pressure that is 0.05 times a normal internal pressure P has been increased to the normal internal pressure P, amounts of protrusions at points Pa, Ph, Pd, and Pe are represented as Da (mm), Dh (mm), Dd (mm), and De (mm), respectively. A sum Fa (((Dd+De)/W)×100) of the amounts of protrusions for each sidewall 6 satisfies mathematical expressions (2) and (3) in which an aspect ratio A is used, and a difference Gs (((Da?Dh)/W)×100) in the amount of protrusion for a tread 4 satisfies mathematical expressions (5) and (6). 0.02626×A?1.8615<Fa ??(2) Fa<0.02626×A?0.6615 ??(3) ?0.010819×A?0.084658<Gs ??(5) Gs<?0.010819×A+0.Type: ApplicationFiled: February 6, 2014Publication date: January 14, 2016Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuo ASANO, Shintaro TOMITA