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公开(公告)号：US20240308276A1
公开(公告)日：2024-09-19
申请号：US18675955
申请日：2024-05-28
Applicant: PIRELLI TYRE S.P.A.
Inventor： Gianfranco COLOMBO , Roberto BOLZONI , Stefano BIZZI , Daniele LORENZETTI
CPC classification number: B60C11/033 , B60C11/0304 , B60C11/0306 , B60C11/1392 , B60C11/0318 , B60C2011/0341 , B60C2011/0348 , B60C2011/0353 , B60C2011/0355 , B60C2011/036 , B60C2011/0365
Abstract: A tyre having a tread is described. The tyre has a central portion located across an equatorial plane, a first shoulder portion located towards an outer side of the tyre and a second shoulder portion located towards an inner side of the tyre. The central portion is separated from the first shoulder portion by two first circumferential grooves. The first shoulder portion and the second shoulder portion have a plurality of first transverse grooves having a first end located substantially at the respective edge of the tread, having a width greater than or equal to about 4 mm and an axial extension equal to at least 50% of the width of the shoulder portion in which they are located.
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公开(公告)号：US20240181815A1
公开(公告)日：2024-06-06
申请号：US18389281
申请日：2023-11-14
Applicant: Toyo Tire Corporation
Inventor： Harunobu Suita
IPC: B60C11/13
CPC classification number: B60C11/13 , B60C2011/0353
Abstract: In a pneumatic tire for heavy load according to the embodiment, a shoulder rib provided on a tread surface includes a thin groove extending in a tire circumferential direction on an inner side in a tire axial direction of a ground contact end, a main body rib formed on the inner side in the tire axial direction of the thin groove, a sacrifice rib formed on an outer side in the tire axial direction of the thin groove, and sipes provided in the main body rib and opening to the thin groove, and a depth Dg of the thin groove, a depth Dm of a shoulder main groove, and a depth Ds of the sipe satisfy 1.10≤Dg/Dm≤ 1.20 and 0.5≤Ds/Dg≤0.7.
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公开(公告)号：US11938758B2
公开(公告)日：2024-03-26
申请号：US17584251
申请日：2022-01-25
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Ken Tanida
CPC classification number: B60C11/0083 , B60C11/0306 , B60C11/1376 , B60C11/0304 , B60C2011/0353 , B60C2011/0372
Abstract: A tire comprises a tread portion axially divided by circumferential grooves into a first middle land portion, a crown land portion and a second middle land portion. Each land portion has a profile protruding radially outwardly from a reference tread profile. The maximum protrusion amount of the second middle land portion's profile is larger than the maximum protrusion amount of the crown land portion's profile which is larger than the maximum protrusion amount of the first middle land portion's profile.
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公开(公告)号：US11904635B2
公开(公告)日：2024-02-20
申请号：US17929257
申请日：2022-09-01
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Kengo Fukuda , Ryota Ikeda , Yuto Ohte , Kohei Miyoshi
CPC classification number: B60C11/0304 , B60C11/1204 , B60C11/1236 , B60C11/1281 , B60C2011/0353 , B60C2011/1209
Abstract: A tread portion 2 includes four circumferential grooves 3 and five land portions 4. Each of the five land portions 4 is provided with no groove having a groove width greater than 2.0 mm, and is provided with only sipes 9. The four circumferential grooves 3 include a shoulder circumferential groove 5. The five land portions 4 include a shoulder land portion 11 and a middle land portion 13. The middle land portion 13 is provided with a plurality of middle sipes 30. The shoulder land portion 11 is provided with a plurality of shoulder sipes 20 each extending from the shoulder circumferential groove 5 to a position beyond a tread end. At least one of the shoulder sipes 20 includes an inclined portion 21. A maximum angle of the inclined portion 21 with respect to a tire axial direction is not greater than a maximum angle of the middle sipe 30 with respect to the tire axial direction. A difference between the maximum angle of the inclined portion 21 and the maximum angle of the middle sipe 30 is not greater than 5°.
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公开(公告)号：US11897291B2
公开(公告)日：2024-02-13
申请号：US17855076
申请日：2022-06-30
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Ryouichi Tomomatsu
CPC classification number: B60C11/1307 , B60C11/0302 , B60C11/0304 , B60C2011/0346 , B60C2011/0348 , B60C2011/0353
Abstract: A tread pattern of a pneumatic tire includes one center continuous land portion and two intermediate continuous land portions that are divided by four circumferential main grooves and that are not provided with lug grooves. Edges on both sides of one center main groove include groove chamfered portions having a chamfered width changing in the circumferential direction in a zigzag shape. In the regions of the intermediate continuous land portions, first sipes extending inward in the lateral direction from shoulder main grooves of the main grooves, which are positioned on outer sides in the lateral direction, are provided. The first sipes each include a sipe main body portion having a constant distance between sipe wall surfaces on a sipe bottom side and a sipe chamfered portion inclined so that the sipe wall surfaces are open toward the tread surface.
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Patent Agency Ranking
公开(公告)号：US11701923B2
公开(公告)日：2023-07-18
申请号：US16737087
申请日：2020-01-08
Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
Inventor： Kiyotaka Ueyama
CPC classification number: B60C11/0304 , B60C11/1236 , B60C2011/0353 , B60C2011/0365 , B60C2011/0372
Abstract: A tread portion has an outer tread end that is positioned on an outer side of a vehicle when mounted to the vehicle, a plurality of circumferential grooves that extend continuously in a tire circumferential direction, and a plurality of land portions that are defined by the circumferential grooves. The circumferential grooves include an outer circumferential groove that extends adjacently to a tire equator in a region closer to the outer tread end than the tire equator is. The land portions include an outer shoulder land portion that is defined between the outer circumferential groove and the outer tread end so as to continuously extend therebetween in a tire axial direction, and that has the largest width in the tire axial direction among the land portions. The outer shoulder land portion has a first outer lateral groove that extends inward in the tire axial direction and terminates in the outer shoulder land portion. An angle of the first outer lateral groove relative to the tire axial direction at a terminating position in the outer shoulder land portion is 0 to 20°.
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公开(公告)号：US20230191834A1
公开(公告)日：2023-06-22
申请号：US17997215
申请日：2021-04-12
Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
Inventor： Yukari TOMISAKI
CPC classification number: B60C3/04 , B60C11/033 , B60C11/0008 , B60C11/005 , B60C1/0016 , C08K3/36 , C08L9/06 , B60C2011/0025 , B60C2011/0353 , C08L2205/025 , C08L2205/03 , C08L2205/035
Abstract: Provided is a pneumatic radial tire for a passenger car that exhibits both riding comfort at low temperatures and stealing stability at high-speed running. The present invention is a pneumatic radial tire for a passenger car, in which: a carcass and a tread are provided; the tread is integrated into a standardized rim; when internal pressure is at a standardized internal pressure, the tire has a cross-sectional width Wt (mm) and an outer diameter Dt (mm) satisfying 1963.4≤(Dt2π/4)/Wt≤2827.4; the tread comprises at least one main groove in a running surface of the tread, extending in the circumferential direction of the tread; the land/sea ratio at the tread running surface is greater than 55% and less than 85%; and a rubber composition that forms the tread has a loss tangent (tan δ) which, when measured at a frequency of 10 Hz, an initial strain of 2%, and a dynamic strain rate of 1%, is such that |20° C. tan δ-50° C. tan δ| is at least 0.01 and less than 0.15, and 15° C. tan δ-20° C. tan δ| is greater than 0.15 and less than 0.70.
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公开(公告)号：US20180319220A1
公开(公告)日：2018-11-08
申请号：US15775364
申请日：2015-11-13
Applicant: The Yokahama Rubber Co., LTD.
Inventor： Kenichi MATSUMOTO
IPC: B60C11/16
CPC classification number: B60C11/1668 , B60C11/0302 , B60C11/16 , B60C11/1625 , B60C11/1675 , B60C2011/0353 , B60C2011/0355
Abstract: A stud pin includes a tip and a body portion provided around a center axis of the stud pin. The body portion includes an upper flange, a lower flange, and a shank portion connecting the upper flange and the lower flange. A first side surface of the lower flange includes a first curved surface recessed inward in relation to the body portion. A second side surface of the upper flange includes a second curved surface bulging toward a periphery of the body portion, and a pair of flat surfaces configured to connect the second curved surface to interpose the second curved surface. A trough portion where the first curved surface is most recessed and a peak portion where the second curved surface is most bulged are located at an identical orientation position about the center axis as viewed from the axial direction.
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公开(公告)号：US20180319219A1
公开(公告)日：2018-11-08
申请号：US15964826
申请日：2018-04-27
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Ryo OBA
CPC classification number: B60C11/0304 , B60C11/0302 , B60C11/0306 , B60C11/0332 , B60C11/1204 , B60C11/1236 , B60C11/1263 , B60C11/1281 , B60C2011/0334 , B60C2011/0344 , B60C2011/0353 , B60C2011/0358 , B60C2011/0365 , B60C2011/0372 , B60C2011/039 , B60C2011/1209
Abstract: A tire tread is provided with a crown main groove, and outboard and inboard shoulder main grooves to divide the tread portion into an outboard crown land portion, an inboard crown land portion, an outboard shoulder land portion and an inboard shoulder land portion. The inboard shoulder land portion is provided with inboard shoulder lateral grooves connecting an inboard tread edge and the inboard shoulder main groove. The outboard shoulder land portion is provided with outboard shoulder lateral grooves extending axially inwardly from an outboard tread edge and terminating within the outboard shoulder land portion. The inboard crown land portion is provided with inboard crown lateral grooves extending from the inboard shoulder main groove and terminating within the inboard crown land portion. The outboard crown land portion is provided with outboard crown lateral grooves extending from the crown main groove and terminating within the outboard crown land portion.
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公开(公告)号：US10071602B2
公开(公告)日：2018-09-11
申请号：US15328434
申请日：2015-07-23
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Takamasa Motomitsu , Shoei Kakuta , Hideki Hamanaka , Yukihito Yamaguchi , Risa Tauchi , Toshiyuki Sato
CPC classification number: B60C11/13 , B60C9/18 , B60C9/28 , B60C11/03 , B60C11/0311 , B60C11/11 , B60C2009/2016 , B60C2011/0346 , B60C2011/0353 , B60C2011/0355 , B60C2011/0365 , B60C2011/1361 , B60C2200/065
Abstract: 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.
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