Patents by Inventor Takamasa Motomitsu
Takamasa Motomitsu 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: 11548327Abstract: Provided is a bias tire including: bead cores; a bead filler disposed outward of each of the bead cores in a radial direction; and a carcass layer stretching between the bead cores, wrapping around end portions of the bead cores, the carcass layer having opposite ends turned back to be fixed, wherein in a cross section in a meridian direction, a cord on an innermost side of the carcass layer in a tire lateral direction has a curved shape projecting laterally outward at a height from 0.9 times to 1.6 times a height of a flange of a rim on which the bias tire is assembled, and in the cross section in the meridian direction, a cord on an outermost side of the carcass layer in the lateral direction has a curved shape projecting laterally outward at a height from 1.1 times to 1.6 times the height of the flange.Type: GrantFiled: December 26, 2017Date of Patent: January 10, 2023Assignee: The Yokohama Rubber Co., LTD.Inventor: Takamasa Motomitsu
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Publication number: 20220288973Abstract: A pneumatic tire includes a pair of circumferential main grooves extending in a tire circumferential direction, and a pair of shoulder land portions and a single center land portion defined and formed by the circumferential main grooves. In addition, the center land portion includes a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction. A groove depth H21 of the center narrow shallow groove is in a range 0.025?H21/Hg?0.150 with respect to a maximum groove depth Hg of the circumferential main groove.Type: ApplicationFiled: July 31, 2020Publication date: September 15, 2022Inventor: Takamasa MOTOMITSU
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Patent number: 11358413Abstract: A bias tire includes two or more carcass layers, at least one belt disposed outward from the carcass layers in a tire radial direction, a reinforcing rubber layer disposed between carcass plies included in a carcass layer of the carcass layers. A belt width of a widest belt with the widest width of the belts is 110% or more and 150% or less of a tread developed width, and a position of an upper end portion of the reinforcing rubber layer located outward in the tire radial direction is apart 3 mm or more from an end portion of the widest belt.Type: GrantFiled: October 2, 2017Date of Patent: June 14, 2022Assignee: The Yokohama Rubber Co., LTD.Inventor: Takamasa Motomitsu
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Patent number: 11312187Abstract: A tread pattern of a heavy duty pneumatic tire includes: a linear shaped center lug groove; a pair of circumferential main grooves formed in a wave shape in a tire circumferential direction; a center block; and a central narrow groove that does not have a linear shape, having an opening end that opens in the adjacent center lug grooves in a tire lateral direction position excluding on a tire equator line, and having a groove width that is narrower than the groove width of the shoulder lug groove. The groove width of the center lug groove and the circumferential main groove is narrower than the groove width of the shoulder lug groove. The central narrow groove has a portion that extends outwards in a tire lateral direction from the opening end in the half tread region where the opening end is positioned.Type: GrantFiled: March 28, 2017Date of Patent: April 26, 2022Inventors: Takamasa Motomitsu, Yukihito Yamaguchi
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Publication number: 20220009288Abstract: The pneumatic tire includes a carcass layer, a belt layer disposed on an outer side of the carcass layer in a radial direction, and a tread rubber disposed on an outer side of the belt layer in the radial direction. Additionally, the carcass layer has a cord angle of 80° or more and 100° or less. Additionally, the belt layer is formed by layering a first reinforcing belt, a second reinforcing belt that is narrower than the first reinforcing belt, and an auxiliary belt that is spaced apart from a tire equatorial plane and disposed between the carcass layer and the first reinforcing belt. Additionally, the first reinforcing belt has a cord angle of 11° or more and 30° or less, the second reinforcing belt has a cord angle of 1° or more and 11° or less, and the auxiliary belt has a cord angle of 55° or more and 70° or less.Type: ApplicationFiled: June 20, 2019Publication date: January 13, 2022Inventor: Takamasa MOTOMITSU
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Publication number: 20210379933Abstract: The pneumatic tire includes a carcass layer, a belt layer disposed on an outer side of the carcass layer in a radial direction, and a tread rubber disposed on an outer side of the belt layer in the radial direction. Additionally, the carcass layer has a cord angle of 80° or more and 100° or less. Additionally, the belt layer is formed by layering a first reinforcing belt, a second reinforcing belt that is narrower than the first reinforcing belt, and an auxiliary belt that is spaced apart from a tire equatorial plane and disposed between the carcass layer and the first reinforcing belt. Additionally, the first reinforcing belt and the second reinforcing belt have cord angles of 11° or more and 30° or less, and the auxiliary belt has a cord angle of 55° or more and 70° or less.Type: ApplicationFiled: June 18, 2019Publication date: December 9, 2021Inventor: Takamasa MOTOMITSU
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Publication number: 20210114418Abstract: Provided is a bias tire including: bead cores; a bead filler disposed outward of each of the bead cores in a radial direction; and a carcass layer stretching between the bead cores, wrapping around end portions of the bead cores, the carcass layer having opposite ends turned back to be fixed, wherein in a cross section in a meridian direction, a cord on an innermost side of the carcass layer in a tire lateral direction has a curved shape projecting laterally outward at a height from 0.9 times to 1.6 times a height of a flange of a rim on which the bias tire is assembled, and in the cross section in the meridian direction, a cord on an outermost side of the carcass layer in the lateral direction has a curved shape projecting laterally outward at a height from 1.1 times to 1.6 times the height of the flange.Type: ApplicationFiled: December 26, 2017Publication date: April 22, 2021Inventor: Takamasa Motomitsu
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Patent number: 10543720Abstract: A heavy duty pneumatic tire comprises a tread pattern that comprises: circumferential main grooves with a wave-like shape, shoulder lug grooves extending in the tire width direction to a ground contact edge and connecting to the circumferential main grooves at first groove turning portions that protrude outward; center lug grooves connecting to the circumferential main grooves at second groove turning portions that protrude inward; and center blocks defined by adjacent center lug grooves of the center lug grooves adjacent in the tire circumferential direction and the circumferential main grooves, forming a row in the tire circumferential direction. The center lug grooves and the circumferential main grooves have a narrower groove width than the shoulder lug grooves; and each region of the center blocks includes two first narrow grooves having a curved line shape with no bent portions and having a narrower groove width than the shoulder lug grooves.Type: GrantFiled: March 29, 2017Date of Patent: January 28, 2020Assignee: The Yokohama Rubber Co., LTD.Inventor: Takamasa Motomitsu
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Publication number: 20190308454Abstract: A bias tire includes two or more carcass layers, at least one belt disposed outward from the carcass layers in a tire radial direction, a reinforcing rubber layer disposed between carcass plies included in a carcass layer of the carcass layers. A belt width of a widest belt with the widest width of the belts is 110% or more and 150% or less of a tread developed width, and a position of an upper end portion of the reinforcing rubber layer located outward in the tire radial direction is apart 3 mm or more from an end portion of the widest belt.Type: ApplicationFiled: October 2, 2017Publication date: October 10, 2019Inventor: Takamasa Motomitsu
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Publication number: 20190111736Abstract: A heavy duty pneumatic tire comprises a tread pattern that comprises: circumferential main grooves with a wave-like shape, shoulder lug grooves extending in the tire width direction to a ground contact edge and connecting to the circumferential main grooves at first groove turning portions that protrude outward; center lug grooves connecting to the circumferential main grooves at second groove turning portions that protrude inward; and center blocks defined by adjacent center lug grooves of the center lug grooves adjacent in the tire circumferential direction and the circumferential main grooves, forming a row in the tire circumferential direction. The center lug grooves and the circumferential main grooves have a narrower groove width than the shoulder lug grooves; and each region of the center blocks includes two first narrow grooves having a curved line shape with no bent portions and having a narrower groove width than the shoulder lug grooves.Type: ApplicationFiled: March 29, 2017Publication date: April 18, 2019Inventor: Takamasa Motomitsu
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Publication number: 20190111737Abstract: A tread pattern of a heavy duty pneumatic tire includes: a linear shaped center lug groove; a pair of circumferential main grooves formed in a wave shape in a tire circumferential direction; a center block; and a central narrow groove that does not have a linear shape, having an opening end that opens in the adjacent center lug grooves in a tire lateral direction position excluding on a tire equator line, and having a groove width that is narrower than the groove width of the shoulder lug groove. The groove width of the center lug groove and the circumferential main groove is narrower than the groove width of the shoulder lug groove. The central narrow groove has a portion that extends outwards in a tire lateral direction from the opening end in the half tread region where the opening end is positioned.Type: ApplicationFiled: March 28, 2017Publication date: April 18, 2019Inventors: Takamasa Motomitsu, Yukihito Yamaguchi
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Patent number: 10071602Abstract: A tread pattern is provided with: shoulder lug grooves open at ground contact edges; center lug grooves having two ends; circumferential primary grooves formed in a wave-like shape by alternately connecting ends of the center lug grooves and the inner ends in the tire width direction of the shoulder lug grooves; and center blocks defined by the center lug grooves and the pair of circumferential primary grooves. The belt portion of the tire includes first cross belt layers and second cross belt layers. The ratio of the width WB of the center blocks in the tire width direction to the belt width W1 of the belt layer having the shortest width in the tire width direction among the first cross belt layers is in the range from 0.6 to 0.9.Type: GrantFiled: July 23, 2015Date of Patent: September 11, 2018Assignee: The Yokohama Rubber Co., LTD.Inventors: Takamasa Motomitsu, Shoei Kakuta, Hideki Hamanaka, Yukihito Yamaguchi, Risa Tauchi, Toshiyuki Sato
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Publication number: 20170210179Abstract: A tread pattern is provided with: shoulder lug grooves open at ground contact edges; center lug grooves having two ends; circumferential primary grooves formed in a wave-like shape by alternately connecting ends of the center lug grooves and the inner ends in the tire width direction of the shoulder lug grooves; and center blocks defined by the center lug grooves and the pair of circumferential primary grooves. The belt portion of the tire includes first cross belt layers and second cross belt layers. The ratio of the width WB of the center blocks in the tire width direction to the belt width W1 of the belt layer having the shortest width in the tire width direction among the first cross belt layers is in the range from 0.6 to 0.9.Type: ApplicationFiled: July 23, 2015Publication date: July 27, 2017Applicant: The Yokohama Rubber Co., LTD.Inventors: Takamasa Motomitsu, Shoei Kakuta, Hideki Hamanaka, Yukihito Yamaguchi, Risa Tauchi, Toshiyuki Sato
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Patent number: D833379Type: GrantFiled: August 2, 2017Date of Patent: November 13, 2018Assignee: THE YOKOHAMA RUBBER CO., LTD.Inventor: Takamasa Motomitsu
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Patent number: D938897Type: GrantFiled: December 18, 2019Date of Patent: December 21, 2021Assignee: THE YOKOHAMA RUBBER CO., LTD.Inventor: Takamasa Motomitsu