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    Heavy duty pneumatic tire
    21.
    发明授权
    Heavy duty pneumatic tire 有权

    公开(公告)号：US11167598B2

    公开(公告)日：2021-11-09

    申请号：US16088803

    申请日：2017-03-30

    Applicant: The Yokohama Rubber Co., LTD.

    Inventor： Yukihito Yamaguchi

    IPC: B60C11/11 ,  B60C11/13 ,  B60C11/03

    Abstract: A heavy duty pneumatic tire includes a tread pattern that includes circumferential main grooves, a center wide groove extending in a center region between the circumferential main grooves, and center lug grooves disposed in a first center region and a second center region on either side of the center wide groove in the tire lateral direction, the center lug grooves having a linear shape and opening to the center wide groove. The center lug grooves and the circumferential main grooves have a narrower groove width than shoulder lug grooves disposed in a shoulder region. The center lug grooves of the first center region and the center lug grooves of the second center region extend parallel with one another. The center wide groove has a constant groove depth that is shallower than the maximum groove depth of the circumferential main grooves and the center lug grooves.

    Pneumatic tire
    22.
    发明授权
    Pneumatic tire 有权

    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

    IPC: B60C11/11 ,  B60C11/13 ,  B60C11/03

    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.

    Heavy duty pneumatic tire
    23.
    发明授权
    Heavy duty pneumatic tire 有权

    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

    IPC: B60C11/11 ,  B60C11/13 ,  B60C11/03 ,  B60C11/00

    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°.

    Pneumatic Tire
    27.
    发明申请
    Pneumatic Tire 审中-公开
    气动轮胎

    公开(公告)号：US20160144662A1

    公开(公告)日：2016-05-26

    申请号：US14900052

    申请日：2014-06-17

    Applicant: THE YOKOHAMA RUBBER CO., LTD.

    Inventor： Yukihito Yamaguchi ,  Satoru Isobe

    IPC: B60C9/20 ,  B60C9/02 ,  B60C9/00 ,  B60C15/04

    CPC classification number: B60C9/2006 ,  B60C9/0007 ,  B60C9/02 ,  B60C15/04 ,  B60C2009/0071 ,  B60C2009/1871 ,  B60C2009/2016 ,  B60C2009/2051 ,  B60C2009/2064 ,  B60C2009/2067 ,  B60C2009/2077 ,  B60C2009/2093 ,  B60C2200/06

    Abstract: This pneumatic tire (1) includes: a pair of bead cores (11, 11); a carcass layer (13) extending between the pair of bead cores (11, 11); and a belt layer (14) including a laminate of at least four belt plies (141 to 144) having steel belt cords covered with coating rubber, the belt layer being disposed on the outer side in a tire radial direction of the carcass layer (13). An inter-cord distance (Ga) between an outermost layer belt ply (fourth belt (144)) and an adjacent belt ply (third belt (143)) has a relationship such that 0.80≦Ga/φmax≦1.80 with respect to a maximum value ((max) of outer diameters (φ4, φ3) of belt cords (1441, 1431) in the outermost layer belt ply (144) and the adjacent belt ply (143).

    Abstract translation: 该充气轮胎（1）包括：一对胎圈芯（11,11）; 在所述一对胎圈芯（11,11）之间延伸的胎体层（13）; 以及带层（14），其包括具有被涂覆橡胶覆盖的钢带帘线的至少四个带束层（141至144）的层压体，所述带束层设置在胎体层（13）的轮胎径向外侧 ）。 在最外层带束层（第四带（144））和相邻的带束层（第三带（143））之间的帘线间距离（Ga）具有如下关系：0.80＆nlE; Ga /＆phgr; max＆nlE; 1.80 达到最外层带束层（144）和相邻带束层（143）中的带束带（1441,1431）的外径（＆phgr。4，＆phgr; 3）的最大值（（max））。

    Pneumatic tire
    28.
    发明授权
    Pneumatic tire 有权

    公开(公告)号：US10821779B2

    公开(公告)日：2020-11-03

    申请号：US14434748

    申请日：2012-10-10

    Applicant: The Yokohama Rubber Co., LTD.

    Inventor： Yukihito Yamaguchi

    IPC: B60C3/04 ,  B60C9/22 ,  B60C11/00 ,  B60C11/13 ,  B60C9/18 ,  B60C11/01 ,  B60C9/20 ,  B60C9/28 ,  B60C5/12 ,  B60C9/00 ,  B60C11/03 ,  B60C11/04 ,  B60C11/02

    Abstract: A pneumatic tire comprises a carcass layer, a belt layer disposed on the outer side in the tire radial direction of the carcass layer, and tread rubber disposed on the outer side in the tire radial direction of the belt layer. The belt layer is formed by laminating a pair of cross belts having belt angles with an absolute value from 10° to 45° both inclusive and mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of ±5° relative to the tire circumferential direction. The distance (Gcc) from the tread profile to the tire inner circumferential surface along the tire equatorial plane and the distance (Gsh) from the tread edge to the tire inner circumferential surface have a relationship satisfying 1.10≤Gsh/Gcc. The groove depth (Dsh) and under-groove gauge (UDsh) of the outermost circumferential main groove have a relationship satisfying 0.20≤UDsh/Dsh.

    Pneumatic tire for heavy loads
    29.
    发明授权
    Pneumatic tire for heavy loads 有权

    公开(公告)号：US10308079B2

    公开(公告)日：2019-06-04

    申请号：US15328397

    申请日：2015-07-23

    Applicant: The Yokohama Rubber Co., LTD.

    Inventor： Yukihito Yamaguchi ,  Shoei Kakuta ,  Hideki Hamanaka ,  Risa Tauchi ,  Toshiyuki Sato

    IPC: B60C11/11 ,  B60C11/13 ,  B60C11/03

    Abstract: A tread pattern of a pneumatic tire comprises shoulder lug grooves that open to ground contact edges; center lug grooves; a pair of circumferential primary grooves with a narrower groove width than the shoulder lug grooves, wherein a portion that bends outward in the tire width direction connects to the shoulder lug grooves and a portion that bends inward in the tire width direction connects to the center lug grooves; and center blocks defined by the center lug grooves and the circumferential primary grooves. The circumferential primary grooves are on opposite sides in the tire width direction in regions spaced from a center line by a distance of from 30% to 60% of half of a tread width T. The ratio of the groove width P3 of the center lug grooves to the maximum length LB in the tire circumferential direction of the center blocks is from 0.03 to 0.07.

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