Patents by Inventor Sachio Sakamoto

Sachio Sakamoto 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).

  • Patent number: 11072206
    Abstract: A pneumatic tire has a plurality of main grooves extending in a tire circumferential directions and a plurality of land lines defined by the plurality of main grooves, on a tread face. At least one of the plurality of land lines protrudes outward in a tire diametrical direction from a profile line. A void ratio of a first area positioned on one side of a center of a width of the at least one land line is larger than a void ratio of a second area positioned on the other side. A protruding height of the second area from the profile line is larger than a protruding height of the first area.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: July 27, 2021
    Assignee: TOYO TIRE CORPORATION
    Inventor: Sachio Sakamoto
  • Patent number: 11052707
    Abstract: A pneumatic tire has a tread face, a plurality of main grooves extending in a tire circumferential direction in the tread face, and a plurality of land lines defined by the plurality of main grooves on the tread face. At least one of the plurality of land lines protrudes outward in a tire diametrical direction from a profile line. A top face of a central portion of the land line in a width direction is formed in an arc shape protruding outward in the tire diametrical direction in a section along a tire meridian. Top faces of opposite end portions of the land line in the width direction are formed in arc shapes protruding inward in the tire diametrical direction in the section along the tire meridian.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: July 6, 2021
    Assignee: TOYO TIRE CORPORATION
    Inventor: Sachio Sakamoto
  • Patent number: 10500900
    Abstract: In a pneumatic tire, a sidewall portion includes a plurality of projecting portions projecting in a tire width-direction. The projecting portions are placed such that at least portions of the projecting portions are superposed on one of a plurality of blocks in a tire radial-direction as viewed from a tire width-direction. At least one of the plurality of projecting portions includes at least one opening. A total sum of an opening area of the opening is equal to or smaller than an actual area of the projecting portion in the at least one of the projecting portions.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: December 10, 2019
    Assignee: TOYO TIRE CORPORATION
    Inventor: Sachio Sakamoto
  • Publication number: 20190232724
    Abstract: A pneumatic tire comprises a plurality of main grooves extending in a tire circumferential direction, and a plurality of land portions that are partitioned by at least one contact patch end and the plurality of main grooves, the plurality of land portions comprise a center land portion that contains a center in a tire width direction, and a pair of side land portions that are adjacent in the tire width direction to the center land portion, and respective maximum values of amounts by which the pair of side land portions protrude from a tread profile are each greater than a maximum value of an amount by which the center land portion protrudes from the tread profile.
    Type: Application
    Filed: January 22, 2019
    Publication date: August 1, 2019
    Applicant: Toyo Tire Corporation
    Inventor: Sachio Sakamoto
  • Publication number: 20190232729
    Abstract: A pneumatic tire comprises a plurality of main grooves extending in a tire circumferential direction, and a plurality of land portions that are partitioned by at least one contact patch end and the plurality of main grooves, at least one of the land portions comprises a protruding region that protrudes from a tread profile, a beveled region that is arranged at an end in a tire width direction of the at least one land portion, and a connecting surface that connects a surface of the protruding region and a surface of the beveled region and that is arranged so as to be parallel to a line drawn normal to the tread profile.
    Type: Application
    Filed: January 24, 2019
    Publication date: August 1, 2019
    Applicant: Toyo Tire Corporation
    Inventor: Sachio Sakamoto
  • Publication number: 20190232725
    Abstract: A pneumatic tire comprises a plurality of main grooves extending in a tire circumferential direction, and a plurality of land portions that are partitioned by at least one contact patch end and the plurality of main grooves, the plurality of land portions comprise a center land portion that contains a center in a tire width direction, and a pair of side land portions that are adjacent in the tire width direction to the center land portion, and a maximum value of a recessed amount by which the center land portion is recessed relative to a tread profile is greater than respective maximum value of recessed amounts by which each of the pair of side land portions are recessed relative to the tread profile.
    Type: Application
    Filed: January 22, 2019
    Publication date: August 1, 2019
    Applicant: Toyo Tire Corporation
    Inventor: Sachio Sakamoto
  • Publication number: 20190232723
    Abstract: A pneumatic tire comprises a plurality of main grooves extending in a tire circumferential direction, and a plurality of land portions that are partitioned by at least one contact patch end and the plurality of main grooves, the plurality of land portions comprise a center land portion that contains a center in a tire width direction, and a side land portion that is adjacent in the tire width direction to the center land portion, a dimension in the tire width direction of one land portion among the center land portion and the side land portion is less than a dimension in the tire width direction of the other land portion thereamong, and a maximum value of an amount by which the one land portion protrudes from a tread profile is greater than a maximum value of an amount by which the other land portion protrudes from the tread profile.
    Type: Application
    Filed: January 22, 2019
    Publication date: August 1, 2019
    Applicant: Toyo Tire Corporation
    Inventor: Sachio Sakamoto
  • Publication number: 20190225022
    Abstract: A pneumatic tire has a plurality of main grooves extending in a tire circumferential direction, and a plurality of land lines defined by the plurality of main grooves in a tread face. At least one of the plurality of land lines extends outward in a tire diametrical direction from a tread profile. A plurality of lateral grooves or notches are formed at intervals in the tire circumferential direction in the at least one land line. Each of blocks formed between the lateral grooves or the notches has a protruding height from the tread profile that increases from circumferential opposite end portions toward a circumferential central portion of the block.
    Type: Application
    Filed: December 27, 2018
    Publication date: July 25, 2019
    Applicant: TOYO TIRE & RUBBER CO., LTD.
    Inventor: Sachio Sakamoto
  • Publication number: 20190217668
    Abstract: A pneumatic tire has a tread face, a plurality of main grooves extending in a tire circumferential direction in the tread face, and a plurality of land lines defined by the plurality of main grooves on the tread face. At least one of the plurality of land lines protrudes outward in a tire diametrical direction from a profile line. A top face of a central portion of the land line in a width direction is formed in an arc shape protruding outward in the tire diametrical direction in a section along a tire meridian. Top faces of opposite end portions of the land line in the width direction are formed in arc shapes protruding inward in the tire diametrical direction in the section along the tire meridian.
    Type: Application
    Filed: December 27, 2018
    Publication date: July 18, 2019
    Applicant: TOYO TIRE & RUBBER CO., LTD.
    Inventor: Sachio Sakamoto
  • Publication number: 20190217667
    Abstract: A pneumatic tire has a plurality of main grooves extending in a tire circumferential directions and a plurality of land lines defined by the plurality of main grooves, on a tread face. At least one of the plurality of land lines protrudes outward in a tire diametrical direction from a profile line. A void ratio of a first area positioned on one side of a center of a width of the at least one land line is larger than a void ratio of a second area positioned on the other side. A protruding height of the second area from the profile line is larger than a protruding height of the first area.
    Type: Application
    Filed: December 27, 2018
    Publication date: July 18, 2019
    Applicant: TOYO TIRE & RUBBER CO., LTD.
    Inventor: Sachio Sakamoto
  • Publication number: 20190143759
    Abstract: A pneumatic tire has a pair of bead portions, a pair of side wall portions which extend from the bead portions to an outer side in a tire diametrical direction, a tread portion which is connected to an outer side end of each of the pair of side wall portions in the tire diametrical direction, a plurality of projections which are provided in a buttress region of the side wall portions along a tire circumferential direction; and a plurality of spews which protrude out of surfaces of the projections. In each of a plurality of sides forming a periphery of the surfaces of the projections, in the case that rectangular areas having a distance from the side being in a range of 2.5 mm or less are defined on the surfaces of the projections, at least one spew is provided in each of the rectangular areas.
    Type: Application
    Filed: October 23, 2018
    Publication date: May 16, 2019
    Applicant: TOYO TIRE & RUBBER CO., LTD.
    Inventor: Sachio Sakamoto
  • Publication number: 20180065418
    Abstract: In a pneumatic tire, at least one of a plurality of projecting portions includes at least one opening. At least one of the projecting portions is divided into an inner region placed on inner side in a tire radial-direction and an outer region placed on outer side in the tire radial-direction with respect to a position of an outer end of the belt play in a tire width-direction, the belt play placed on the innermost side in the tire radial-direction. A total sum of an opening area of the opening in the outer region is different from a total sum of an opening area of the opening in the inner region.
    Type: Application
    Filed: April 20, 2017
    Publication date: March 8, 2018
    Applicant: TOYO TIRE & RUBBER CO., LTD.
    Inventor: Sachio Sakamoto
  • Publication number: 20180065415
    Abstract: In a pneumatic tire, a sidewall portion includes a plurality of projecting portions projecting in a tire width-direction. The projecting portions are placed such that at least portions of the projecting portions are superposed on one of a plurality of blocks in a tire radial-direction as viewed from a tire width-direction. At least one of the plurality of projecting portions includes at least one opening. A total sum of an opening area of the opening is equal to or smaller than an actual area of the projecting portion in the at least one of the projecting portions.
    Type: Application
    Filed: April 26, 2017
    Publication date: March 8, 2018
    Applicant: TOYO TIRE & RUBBER CO., LTD.
    Inventor: Sachio Sakamoto
  • Patent number: 8069889
    Abstract: Protrusions 11 are provided in a buttress portion 20, the protrusions 11 are composed of a center portion 11a extending from the groove bottom 4 of the transverse grooves 2 toward the tire rotational axis and side portions 11b, the center portion 11a and the side portions 11b are integrally formed, the side portions 11b extend from the same cross-sectional height as, that of the center portion toward the tire rotational axis, the protrusions 11 extend at least to a virtual line 22 in which the inner most belt layer 21a is virtually extended to the buttress portion 20, and the width W of the side portions 11b is 7% to 30% of the depth D of the transverse grooves 2, and the thickness L of the protrusions 11 on the virtual line 22 is 1 mm to 10 mm.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: December 6, 2011
    Assignee: Toyo Tire & Rubber Co., Ltd.
    Inventor: Sachio Sakamoto
  • Publication number: 20090159166
    Abstract: Protrusions 11 are provided in a buttress portion 20, the protrusions 11 are composed of a center portion 11a extending from the groove bottom 4 of the transverse grooves 2 toward the tire rotational axis and side portions 11b, the center portion 11a and the side portions 11b are integrally formed, the side portions 11b extend from the same cross-sectional height as, that of the center portion toward the tire rotational axis, the protrusions 11 extend at least to a virtual line 22 in which the inner most belt layer 21a is virtually extended to the buttress portion 20, and the width W of the side portions 11b is 7% to 30% of the depth D of the transverse grooves 2, and the thickness L of the protrusions 11 on the virtual line 22 is 1 mm to 10 mm.
    Type: Application
    Filed: October 31, 2008
    Publication date: June 25, 2009
    Applicant: Toyo Tire & Rubber Co., Ltd.
    Inventor: Sachio Sakamoto