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公开(公告)号：US10737533B2
公开(公告)日：2020-08-11
申请号：US15519501
申请日：2015-10-05
Applicant: c/o The Yokohama Rubber Co., LTD.
Inventor： Yukihito Yamaguchi , Shoei Kakuta , Hideki Hamanaka , Risa Tauchi , Toshiyuki Sato
Abstract: A pneumatic tire includes a plurality of center lug grooves disposed at intervals in a tire circumferential direction that extend crossing a tire equator line and include a first groove turning portion and a second groove turning portion; a plurality of shoulder lug grooves disposed in the intervals between the plurality of center lug grooves in the tire circumferential direction extending outward in the tire width direction, an inner end in the tire width direction being disposed outward of an end of the center lug groove in the tire width direction; a pair of circumferential main grooves to which the ends of the center lug grooves and the inner ends of the plurality of shoulder lug grooves in the tire width direction alternately connect; and a circumferential secondary groove disposed around the entire circumference of the pneumatic tire with a wave-like shape.
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公开(公告)号：US10322609B2
公开(公告)日：2019-06-18
申请号：US15328427
申请日：2015-05-13
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Shoei Kakuta , Hideki Hamanaka , Yukihito Yamaguchi , Risa Tauchi , Toshiyuki Sato
IPC: B60C11/11 , B60C11/117 , B60C11/13 , B60C11/03
Abstract: A tread pattern is provided with: shoulder lug grooves open at ground contact ends; center lug grooves each having opposite ends; circumferential primary grooves each formed in a wavy shape by connecting ends of the center lug grooves and the inner ends of the shoulder lug grooves in the width direction of the tire; and center blocks defined by the center lug grooves and the pair of circumferential primary grooves. The width of the circumferential primary grooves is smaller than the width of the shoulder lug grooves. The center lug grooves are tilted relative to both the circumferential direction and the width direction of the tire and each have a third groove turning portion and a fourth groove turning portion which protrude in the different directions in the circumferential direction of the tire.
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公开(公告)号：US10029517B2
公开(公告)日：2018-07-24
申请号：US15523326
申请日：2015-10-19
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Mitsuru Manabe , Shoei Kakuta , Hideki Hamanaka , Yukihito Yamaguchi , Risa Tauchi , Toshiyuki Sato
Abstract: A heavy-duty pneumatic tire includes a tread pattern including center lug grooves, shoulder lug grooves, a pair of circumferential primary grooves formed in wave-like shapes by alternately connecting ends of the center lug grooves and ends of the shoulder lug grooves and having a smaller width than the width of the shoulder lug grooves, center blocks defined by the center lug groove and the circumferential primary grooves, and a circumferential secondary groove extending in the tire circumferential direction so as to divide regions of the center blocks. The belt portion includes two or greater pairs of belts. The ratio of the width W8 of a belt having a smaller width in each of the belt pairs to the width W7 of a belt having a greater width is 0.75 or greater and 0.90 or less.
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公开(公告)号：US20170225518A1
公开(公告)日：2017-08-10
申请号：US15328427
申请日：2015-05-13
Applicant: The Yokohama Rubber Co. LTD.
Inventor： Shoei Kakuta , Hideki Hamanaka , Yukihito Yamaguchi , Risa Tauchi , Toshiyuki Sato
CPC classification number: B60C11/13 , B60C11/0311 , B60C11/11 , B60C11/1369 , B60C2011/0344 , B60C2011/0346 , B60C2011/0353 , B60C2011/0355 , B60C2011/0369 , B60C2011/0383 , B60C2200/065
Abstract: A tread pattern is provided with: shoulder lug grooves open at ground contact ends; center lug grooves each having opposite ends; circumferential primary grooves each formed in a wavy shape by connecting ends of the center lug grooves and the inner ends of the shoulder lug grooves in the width direction of the tire; and center blocks defined by the center lug grooves and the pair of circumferential primary grooves. The width of the circumferential primary grooves is smaller than the width of the shoulder lug grooves. The center lug grooves are tilted relative to both the circumferential direction and the width direction of the tire and each have a third groove turning portion and a fourth groove turning portion which protrude in the different directions in the circumferential direction of the tire.
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公开(公告)号：US10040320B2
公开(公告)日：2018-08-07
申请号：US15328468
申请日：2015-07-23
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Hideki Hamanaka , Shoei Kakuta , Yukihito Yamaguchi , Risa Tauchi , Toshiyuki Sato
Abstract: The present technology provides a heavy duty pneumatic tire with a tread portion having a tread pattern including: a pair of circumferential primary grooves defined in a wave-like shape and extending in the tire circumferential direction; center lug grooves; center blocks; and circumferential secondary grooves extending in regions of the center blocks and open to the center lug grooves. The center lug grooves have two groove turning portions turned in a bend shape or a curved shape. The circumferential secondary grooves extend in an inclined manner relative to the tire circumferential direction. An inclination angle (θ4) of the circumferential secondary grooves relative to the tire circumferential direction is different from an inclination angle (θ1) of portions of the circumferential primary grooves relative to the tire circumferential direction, the portions extending toward the same side as a side in the tire width direction, toward which the circumferential secondary grooves are inclined.
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Patent Agency Ranking
公开(公告)号：US20170239999A1
公开(公告)日：2017-08-24
申请号：US15519501
申请日：2015-10-05
Applicant: c/o The Yokohama Rubber Co., LTD.
Inventor： Yukihito Yamaguchi , Shoei Kakuta , Hideki Hamanaka , Risa Tauchi , Toshiyuki Sato
CPC classification number: B60C11/11 , B60C11/0304 , B60C11/0311 , B60C11/13 , B60C11/1369 , B60C2011/0346 , B60C2011/0353 , B60C2011/0355 , B60C2011/0372 , B60C2200/065
Abstract: A pneumatic tire includes a plurality of center lug grooves disposed at intervals in a tire circumferential direction that extend crossing a tire equator line and include a first groove turning portion and a second groove turning portion; a plurality of shoulder lug grooves disposed in the intervals between the plurality of center lug grooves in the tire circumferential direction extending outward in the tire width direction, an inner end in the tire width direction being disposed outward of an end of the center lug groove in the tire width direction; a pair of circumferential main grooves to which the ends of the center lug grooves and the inner ends of the plurality of shoulder lug grooves in the tire width direction alternately connect; and a circumferential secondary groove disposed around the entire circumference of the pneumatic tire with a wave-like shape.
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公开(公告)号：US10377179B2
公开(公告)日：2019-08-13
申请号：US14786529
申请日：2014-04-22
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Toshiyuki Sato
Abstract: A pneumatic tire (1), wherein an inter-cord distance (Gcl) between a circumferential reinforcing layer (145) and an inner-side belt ply (142) at a tire equatorial plane (CL), an inter-cord distance (Gcu) between the circumferential reinforcing layer (145) and an outer-side belt ply (143) at the tire equatorial plane (CL), an inter-cord distance (Gsl) between the circumferential reinforcing layer (145) and the inner-side belt ply (142) at end regions of the circumferential reinforcing layer (145), an inter-cord distance (Gsu) between the circumferential reinforcing layer (145) and the outer-side belt ply (143) at the end regions of the circumferential reinforcing layer (145) have a relationship such that 1.20≤(Gcl+Gcu)/(Gsl+Gsu)≤9.20.
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公开(公告)号：US10300746B2
公开(公告)日：2019-05-28
申请号：US15520805
申请日：2015-10-05
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Toshiyuki Sato , Shoei Kakuta , Hideki Hamanaka , Yukihito Yamaguchi , Risa Tauchi
Abstract: A pneumatic tire includes center lug grooves disposed at intervals in a tire circumferential direction that extend crossing a tire equator line and include a first groove turning portion and a second groove turning portion; shoulder lug grooves disposed in the intervals between the center lug grooves in the tire circumferential direction extending outward in the tire width direction, an inner end in the tire width direction being disposed outward of an end of the center lug groove in the tire width direction; a pair of circumferential main grooves to which the ends of the center lug grooves and the inner ends of the shoulder lug grooves in the tire width direction alternately connect; and a circumferential secondary groove disposed around the entire circumference of the pneumatic tire that intersects the center lug grooves between the first groove turning portion and the second groove turning portion.
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公开(公告)号：US09987885B2
公开(公告)日：2018-06-05
申请号：US15328440
申请日：2015-07-23
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Risa Tauchi , Shoei Kakuta , Hideki Hamanaka , Yukihito Yamaguchi , Toshiyuki Sato
CPC classification number: B60C11/13 , B60C11/00 , B60C11/03 , B60C11/0304 , B60C11/0309 , B60C11/11 , B60C2011/0025 , B60C2011/0346 , B60C2011/0348 , B60C2011/0351 , B60C2011/0353 , B60C2011/0355 , B60C2011/0365 , B60C2011/1361 , B60C2200/065
Abstract: A pneumatic tire with improved heat build-up resistance in a land portion in a tread center region. The pneumatic tire is provided with a tread pattern that includes a plurality of center lug grooves (14) disposed at intervals in a tire circumferential direction that cross a tire equator line; a plurality of shoulder lug grooves (12A, 12B) disposed in intervals between the plurality of center lug grooves in the tire circumferential direction extending outward in the tire width direction, an inner end in the tire width direction being disposed outward of an end of the center lug groove in the tire width direction; a pair of circumferential primary grooves (11A, 11B) extending around an entire circumference of the pneumatic tire in a wave-like shape with the ends of the center lug grooves and the inner ends of the plurality of shoulder lug grooves in the tire width direction alternately connecting to the pair of circumferential primary grooves (11A, 11B); and a circumferential secondary groove (10) disposed on the tire equator line around the entire circumference of the pneumatic tire that intersects the center lug grooves. A straight line that joins an intersection portion between the center lug groove and the circumferential secondary groove and the end of the center lug groove has an inclination angle with respect to the tire circumferential direction ranging from 55° to 75°.
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公开(公告)号：US09962997B2
公开(公告)日：2018-05-08
申请号：US15328466
申请日：2015-07-23
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Yukihito Yamaguchi , Shoei Kakuta , Hideki Hamanaka , Risa Tauchi , Toshiyuki Sato
CPC classification number: B60C11/13 , B60C11/03 , B60C11/11 , B60C2011/0346 , B60C2011/0348 , B60C2011/0351 , B60C2011/0353 , B60C2011/0355 , B60C2011/0358 , B60C2011/0365 , B60C2011/1361 , B60C2200/065
Abstract: A pneumatic tire having a tread pattern includes: shoulder lug grooves opening at ground contact edges; center lug grooves having both ends; circumferential primary grooves being formed to wave-like shape and alternately connecting the ends of the center lug grooves and inward ends of the shoulder lug grooves in the tire width direction; center blocks formed in a row defined by the center lug grooves and the pair of circumferential primary grooves; and circumferential secondary grooves being formed in regions of the center blocks and interconnecting center lug grooves adjacent in the tire circumferential direction. The circumferential secondary grooves have secondary groove turning portions, and the center lug grooves have lug groove turning portions and connect to the circumferential secondary grooves at the lug groove turning portions.
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