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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 13787. Отображено 100.
05-01-2012 дата публикации

Pneumatic tire

Номер: US20120000586A1
Автор: Kiyoshi KAMI
Принадлежит: Sumitomo Rubber Industries Ltd

A pneumatic tire is provided in the tread portion with zigzag circumferential grooves and axial grooves so that a row of circumferentially arranged blocks is formed on each side of each of the zigzag circumferential grooves. Each of the zigzag circumferential grooves is composed of axially inner and outer circumferential segments and oblique segments. The axially inner and outer circumferential segments are arranged alternately in the tire circumferential direction. The oblique segments connect between the axially inner and outer circumferential segments, whereby the zigzag circumferential groove extends in the form of a trapezoidal wave. The zigzag amplitude is in a range of from 4 to 15% of a half tread width (Tw/2). The width of the zigzag circumferential groove is in a range of from 7 to 13% of the half tread width (Tw/2). The number of the axial grooves connected to each of the zigzag circumferential grooves on both side thereof is in a range of from 8 to 12 when counted in a tire footprint. The axial grooves each have a groove width WY of from 8 to 25% of a pitch length Py between the axial groove and the circumferentially adjacent axial groove.

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Номер записи: 1
12-01-2012 дата публикации

Pneumatic tire for construction vehicle

Номер: US20120006455A1
Автор: Jyunya Asari
Принадлежит: Bridgestone Corp

An object of the present invention is to provide a pneumatic tire for a construction vehicle capable of suppressing deterioration in heat release property while maintaining high wear resistance especially when used as driving wheels. A central area 20 is provided with a central narrow groove 21 continuously extending along a tire circumferential direction in a zigzag form. Each side area 30 is provided with a side narrow groove 32 . A width direction narrow groove 22 is provided The central narrow groove 21 , the side narrow grooves 32 and the width direction narrow grooves 22 define plural polygonal block land portions 23 having five or more straight sides in the tread portion 10 . The block land portions are lined in the tire circumferential direction to form two block arrays arranged next to each other.

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Номер записи: 2
12-01-2012 дата публикации

Tire

Номер: US20120006456A1
Автор: Makoto Koshio
Принадлежит: Bridgestone Corp

Provision of a tire with enhanced wet weather performance while maintaining resistance to uneven wear performance without entailing an increase in the tread rubber volume. A center block row ( 30 ) is formed extending along the tire circumferential direction U in a tread section ( 18 ). Blocks ( 33 ) configuring the center block row ( 30 ) when viewed from the tread face side are formed with long sides ( 34 H) adjacent to respective main grooves ( 20 L), ( 20 R) and short sides ( 34 S 1 ), ( 34 S 2 ). Cutout portions ( 21 ) are formed in the blocks ( 33 ) on the sides of the long sides ( 34 H).

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Номер записи: 3
26-01-2012 дата публикации

Pneumatic tire

Номер: US20120018069A1
Автор: Masaaki Nagayasu
Принадлежит: Yokohama Rubber Co Ltd

A plurality of blocks is provided in a tread portion and a plurality of sipes is provided in a tread surface of the blocks. In the sipes, protrusions are formed on a first sipe wall surface of mutually opposing sipe wall surfaces and recesses that engage with the protrusions are formed on a second sipe wall surface. Collapsing of the portions of the blocks sandwiched by the sipes is suppressed due to the engaging of the protrusions and the recesses. A height of the protrusions provided on the sipe wall surfaces of the sipes located at the edges in the tire circumferential direction is greater than a height of the protrusions provided on the sipe wall surfaces of the other sipes. Specifically, a force that works to suppress bending deformation increases and collapsing of the portions of the blocks located at the edges in the tire circumferential direction is suppressed.

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Номер записи: 4
15-03-2012 дата публикации

Pneumatic tire

Номер: US20120060987A1
Автор: Masayuki Nemoto
Принадлежит: Yokohama Rubber Co Ltd

A pneumatic tire wherein a side from a tire ground contact center line having a smaller groove area ratio includes at least one circumferential main groove and at least one circumferential narrow groove. A depth of the circumferential narrow groove is not less than 60% and not more than 80% of a depth of the circumferential main groove closest to the tire ground contact center line. A width of the circumferential narrow groove is not less than 25% and not more than 40% of a width of the circumferential main groove closest to the tire ground contact center line. A distance from the tire ground contact center line to a center position in the tire width direction of the circumferential narrow groove is not less than 25% and not more than 35% of a tire ground contact width.

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Номер записи: 5
17-05-2012 дата публикации

Pneumatic tire

Номер: US20120118454A1
Автор: Hiroshi Furusawa, Kenichi Sato, Kenichirou Endou, Masaaki Nagayasu, Yoshimasa Hashimoto
Принадлежит: Yokohama Rubber Co Ltd

A pneumatic tire improved in on-ice performance and on-snow performance in good balance. The pneumatic tire includes a tread portion extending in a tire circumferential direction and forming a ring shape, a pair of sidewall portions on both sides of the tread portion, respectively, and a pair of bead portions on inner sides of the sidewall portions in a tire radial direction, respectively. The tread portion includes a plurality of longitudinal grooves extending in the tire circumferential direction and a plurality of lateral grooves extending in a tire width direction. The longitudinal and lateral grooves define a plurality of block rows each including a plurality of blocks. Each of the plurality of blocks included in at least one of the block rows includes at least three closed grooves including at least one first closed groove and at least one second closed groove.

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Номер записи: 6
17-05-2012 дата публикации

Winter tyre

Номер: US20120118457A1
Автор: Giuseppe Matrascia, Maurizio Boiocchi, Vito Bello
Принадлежит: Pirelli Tyre SpA

A tyre includes: a tread band on which is defined a radially outer tread surface, a first plurality of blocks provided on the tread band, and at least a first sipe of the restrained type extending on at least one block of the first plurality in a substantially axial direction defined on the tread band. The first sipe is configured so as to define, between a first and a second block portion divided by the first sipe, at least two separate and distinct couplings of the male/female type, such as to prevent the mutual displacement of the block portions in any direction which, at the block, is substantially tangential to the tread surface, and such as to permit mutual displacement of the block portions in a direction incident to the tread surface. In addition, the first sipe does not intersect any other sipe of the restrained type within the block.

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Номер записи: 7
07-06-2012 дата публикации

Pneumatic tire

Номер: US20120138203A1
Автор: Carlo Kanz, Christian Jean-Marie Kaes, Marc Weydert, Olivio Jean-Baptiste Pagliarini
Принадлежит: Goodyear Tire and Rubber Co

The invention is directed to a pneumatic tire having a rubber tread of a cap/base construction comprising an outer rubber tread cap layer containing an outer running surface and an underlying rubber tread base layer; wherein said tread cap layer comprises at least two circumferential, longitudinal rubber tread cap zones; wherein said tread cap zones individually extend from said tread cap running surface radially inward to said tread base layer; wherein said at least two tread cap zones comprises a first tread cap zone and a second tread cap zone adjacent to the first tread cap zone; the first tread cap zone and the second tread cap zone each independently comprising a vulcanizable rubber composition.

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Номер записи: 8
28-06-2012 дата публикации

Pneumatic tire

Номер: US20120160383A1
Автор: Daniel Scheuren, Olivier De Barsy
Принадлежит: Goodyear Tire and Rubber Co

The present invention is directed to a pneumatic tire 1 , comprising at least one pair of parallel annular beads 3 ; at least one carcass ply wrapped 5 around said beads 3 ; a tread 7 ; and first and second sidewalls 9 disposed between said tread 7 and one of said at least one pair of beads 3 . In accordance with an embodiment of the invention, the tread comprises tread blocks 11 and/or tread ribs 12 , wherein the tread blocks 11 and/or tread ribs 12 comprise sipes 13 extending essentially in an axial direction A of the tire 1 , the sipes 13 consisting of an upper portion 15 essentially aligned with the radial direction R of the tire and a lower portion 17 inclined in the direction of rotation D of the tire 1.

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Номер записи: 9
28-06-2012 дата публикации

Pneumatic tire

Номер: US20120160385A1
Автор: Susumu Tanaka
Принадлежит: Sumitomo Rubber Industries Ltd

A pneumatic tire tread includes center lateral grooves inclined to the reverse direction of the belt cords of the outermost belt ply of the belt, a groove width Wyc of the center lateral grooves being from 1.0 to 6.0 mm, shoulder lateral grooves being inclined to the same direction of the belt cords of the outermost belt ply, the shoulder lateral grooves having a narrow-width portion having a groove width Wys 1 of from 0.4 to 1.5 mm at a position where it connects to a shoulder circumferential main groove, and a wide-width portion having a groove width Wys 2 of from 2.0 to 8.0 mm which is connected to the narrow-width portion and extends beyond the tread ground-contact edge.

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Номер записи: 10
30-08-2012 дата публикации

Tire

Номер: US20120216931A1
Автор: Akiko Shiono
Принадлежит: Bridgestone Corp

Wet performance and partial wear resistance of a tire are improved, and a noise generated during running of the tire is reduced. At a tread portion 2, a plurality of land portions 20, 30, and 40 is defined by circumferential main grooves 10 and 11 extending in a zig-zag manner in a tire circumferential direction. In the center land portion 20 and the second land portion 30, a plurality of hexagonal blocks 21 B, 22 B, 23 B, and 30 B is provided, each gradually expanding to the both sides in the tire width direction from the both end portions in the tire circumferential direction toward the center. In the center land portion 20, the plurality of hexagonal blocks 21 B, 22 B, and 23 B is arranged so as to be brought close to each other in the tire width direction while sandwiching a circumferential thin groove 24 extending in a zig-zag manner in the tire circumferential direction and to be defined by lug grooves 25, 26, and 27 in the tire circumferential direction. In the second land portion 30, the plurality of hexagonal blocks 30 B is arranged so as to continue in the tire circumferential direction while sandwiching a sipe 31, and formed in a rib shape continuous in a ground-contacting surface.

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Номер записи: 11
18-10-2012 дата публикации

Pneumatic tire

Номер: US20120261045A1
Автор: Kohtaro Matsushita
Принадлежит: Yokohama Rubber Co Ltd

A pneumatic tire includes first and second side members at first and second sides and a tread section between the first and second side members. The tread section has a tread pattern including a pair of main grooves extending linearly in a circumferential direction of the tire and a land section extending in the circumferential direction between the main grooves. The land section includes a sub groove extending in the circumferential direction without connecting to the main grooves, and a first sipe connecting between the sub groove and one of the main grooves. The sub groove includes a first groove section extending diagonally toward the first side at 0 to 30 degrees with respect to the circumferential direction and a second groove section connecting to the first groove section and extending diagonally toward the second side at 10 to 45 degrees with respect to the circumferential direction.

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Номер записи: 12
01-11-2012 дата публикации

Winter tyre with improved traction on snow surfaces

Номер: US20120273105A1
Автор: Alessandro Martini, Antonio Tirone, Stefano Ducci
Принадлежит: Bridgestone Corp

A winter tyre with improved traction on snow surfaces; the tyre has a tread with a raised pattern defined by a number of longitudinal and transverse grooves which form at least one longitudinal row of blocks projecting radially from a base surface of the tread. Each block has two longitudinal lateral surfaces bounding two corresponding longitudinal grooves, and two transverse lateral surfaces bounding two corresponding transverse grooves. At least one of the blocks has lateral channels, each of which is formed on the lateral surface of a corresponding block, extends from the base surface of the tread to a top surface of the block, and is designed to impede radial spin-out of snow trapped inside the lateral channel.

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Номер записи: 13
01-11-2012 дата публикации

Tire

Номер: US20120273106A1
Автор: Takaaki Kojima, Yukihiro Kiwaki
Принадлежит: Bridgestone Corp

A tire 1 comprises rib-shaped land portions 20 extending in a tire circumferential direction TC and has a circumferential groove 30 adjacent to the land portions 20 and extending in the tire circumferential direction TC. Tread contact surfaces 10 of the land portions 20 form smooth surfaces with no gap when a normal load is applied and the tread contact surfaces are in contact with a road surface. The circumferential groove 30 includes a shallow groove portion 40 extending in the tread-width direction TW, and a deep groove portion 50 adjacent to the shallow groove portion 40 in the tire circumferential direction and extending in the tread-width direction. A deep groove portion 50 is recessed more inwardly in a tire radial direction TR than the shallow groove portion 40 with a groove bottom 40 c of the shallow groove portion 40 being an upper end of the deep groove portion 50.

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Номер записи: 14
03-01-2013 дата публикации

Tire

Номер: US20130000806A1
Автор: Shinpei Sugiyasu
Принадлежит: Bridgestone Corp

A land portion of a pneumatic tire 1 comprises a land portion 10 having groove wall 10 a a second land portion 20 having a groove wall 20 a . The groove walls 10 a, 20 a meander. A groove width of a main groove 50 changes at a predetermined repetition cycle. The main groove 50 includes: a wide groove portion 50 A having a predetermined width; and a narrow groove portion 50 B which is continuous with the wide groove portion and which is narrower than the predetermined width. A relationship of θ 1>θ2 is satisfied where θ 1 refers to an angle formed between a tire normal line RL and the groove wall 10 a or the groove wall 20 a forming the wide groove portion 50 A and θ 2 refers to an angle formed between the tire normal line RL and the groove wall 10 a or the groove wall 20 a forming the narrow groove portion 50 B.

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Номер записи: 15
17-01-2013 дата публикации

Pneumatic tire for a motorcycle

Номер: US20130014869A1
Автор: Kazunori Yoshiya, Toshiaki Makioka
Принадлежит: Bridgestone Corp

Provided is a pneumatic tire for a motorcycle capable of improving grip performance while ensuring drainage performance, and also capable of attaining excellent wear resistance. The pneumatic tire for a motorcycle of the present invention includes a directional tread pattern having a plurality of different grooves formed on a tread surface, the grooves each converging forward in a rotation direction of the tire, in which: the plurality of different grooves are formed as three different oblique lug grooves ( 2 a to 2 c ) extending, in a development plan view of the tread pattern, from a tread contact end of the tire to a tire equator line (e) as being curved to be deflected to the tire equator line side; the three different oblique lug grooves ( 2 a to 2 c ) each have lengths α, β, γ, respectively, the lengths satisfying Expression (I) α≦β<γ, Expression (II) 1−γ/α<0.1; and the number n of the oblique lug grooves intersecting with a meridian (m) of the tire is defined to satisfy Expression (III) n≧4 (where the oblique lug grooves are assumed to be disposed within a range of 60% to 70% of the entire circumference of the tire).

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Номер записи: 16
17-01-2013 дата публикации

Tread for a pneumatic tire

Номер: US20130014870A1
Автор: Didier Winkin, Francois Pierre Charles Gerard Georges, Lothar Bräun, Phuoc Thuan Le
Принадлежит: Individual

A tread for a pneumatic tire includes a first circumferentially continuous groove, a second circumferentially continuous groove, a third circumferentially continuous groove, a fourth circumferentially continuous groove, a central rib interposed between the second and third axially inner circumferentially continuous grooves, a central rib, a first middle rib, a second middle rib, a first shoulder rib, and a second shoulder rib. The central rib extends continuously around a circumference of the tread. The first middle rib is interposed between the first and second grooves. The first middle rib extends continuously around the circumference of the tread. The second middle rib is interposed between the third and fourth grooves. The second middle rib extends continuously around the circumference of the tread. The first circumferentially extending shoulder rib is disposed laterally outside of the first circumferentially continuous groove. The second circumferentially extending shoulder rib is disposed laterally outside of the fourth circumferentially continuous groove. The central rib has a plurality of circumferentially spaced sipes originating at the second circumferentially continuous groove and extending axially and circumferentially across the central rib to the third circumferentially continuous groove. The first middle rib has a plurality of circumferentially spaced sipes originating at the second inner circumferentially continuous groove and extending axially and circumferentially across the first middle rib to the third circumferentially continuous groove. The second middle rib has a plurality of circumferentially spaced sipes originating at the third inner circumferentially continuous groove and extending axially and circumferentially across the second middle rib to the fourth circumferentially continuous groove.

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Номер записи: 17
17-01-2013 дата публикации

Tire having tread with hidden tread blocks

Номер: US20130014873A1
Автор: Eric Arthur DeBenedittis, Stefan Voss
Принадлежит: Individual

Tires in use wear in a host of ways. One negative manner in which tires, especially truck tires, may wear is in an irregular fashion. When this phenomenon happens, the tread of the tire may become unusable, forcing the user to replace the tire, which is undesirable. This patent application poses a new and useful way of preventing irregular wear involving the use of hidden sipes or tread blocks. In some embodiments, these hidden sipes or tread blocks are found in tread blocks or ribs adjacent other tread blocks or ribs that have been determined to be susceptible to irregular wear. In other embodiments, the hidden sipes or tread blocks are formed by a sipe blade that has a connecting member to which two y-branched members are attached, and further comprising dividing members that connect between the y-branched members.

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Номер записи: 18
28-02-2013 дата публикации

Pneumatic tire having a dual layer tread

Номер: US20130048167A1
Автор: Jérôme Joel Daniel Delville, Jerome Marcel Germain Delu, Michel Jacques Albert Ghislain Meunier, Patrice De Monte
Принадлежит: Goodyear Tire and Rubber Co

A pneumatic tire comprising a carcass and a tread located radially outward of the carcass and extending between the tire sidewalls is disclosed. The tread provides a tread running surface and comprises a first, radially outer tread layer comprising a first rubber compound and a second, radially inner tread layer comprising a second rubber compound, wherein the second tread layer is located radially adjacent to the first tread layer, and wherein the first rubber compound is different from the second rubber compound. The second tread layer comprises a plurality of integrally formed extensions of the second tread layer extending from the second tread layer radially outwardly to the tread running surface. The first rubber compound and the second rubber compound each comprise at least at least 30 parts per hundred parts of rubber (phr) of silica. Each of the extensions has a width as measured in the axial direction of the tire in a range of from 1 to 15 mm.

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Номер записи: 19
28-02-2013 дата публикации

Tire containing silicate microflakes having enhanced traction characteristics

Номер: US20130048171A1
Автор: John Joseph Andre Verthe, Paul Harry Sandstrom, Ping Zhang
Принадлежит: Goodyear Tire and Rubber Co

This invention discloses a tire having enhanced wet traction and ice traction characteristics. These tires are comprised of a generally toroidal-shaped carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead and sidewalls extending radially from and connecting said tread to said beads, wherein said tread is adapted to be ground-contacting, wherein the tread includes at least one circumferential groove which separates circumferential ribs, each circumferential groove having two sides and a base therebetween, and wherein the sides of each circumferential groove are comprised of a rubbery composition that includes silicate microflakes which are substantially aligned in an orientation which is parallel with the sides of the grooves.

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Номер записи: 20
18-04-2013 дата публикации

Pneumatic tire

Номер: US20130092301A1
Автор: Masahiro Ebiko
Принадлежит: Yokohama Rubber Co Ltd

A pneumatic tire, includes, in a tread portion, a pair of circumferential main grooves extending and a land portion provided between the pair of circumferential main grooves and extending in the tire circumferential direction. The land portion includes a bulging portion bulging in a second arc shape in a tire radial direction as a sectional outline of a tread surface of the land portion and chamfered portions connected to the bulging portion and extending straight toward respective groove walls of the circumferential main grooves. A portion of the bulging portion bulges in the tire radial direction with respect to a virtual tread profile line which is determined by a first arc shape in a sectional shape of the tread portion. A maximum bulging amount is 0.1 to 0.8 mm. The virtual tread profile line extends across the chamfered portions.

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Номер записи: 21
25-04-2013 дата публикации

Wet and snow traction design for a tire tread

Номер: US20130098517A1
Автор: Cyril Guichon
Принадлежит: MRT and STM SA

A novel design for a high-speed tire tread is provided that gives improved performance in both water and snow conditions. The tread region of the tire uses transversely-oriented grooves that each extend in a novel manner across the width of the tread region. There are no grooves or other tread features that provide substantial fluid communication between the transversely-oriented grooves.

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Номер записи: 22
16-05-2013 дата публикации

Moulding element comprising a plurality of ribs and at least one rib-free measurement zone

Номер: US20130118660A1
Автор: Didier Gay, Joseph Roche
Принадлежит: Individual

The invention relates to a moulding element for a mould for a tyre comprising a tread provided with a plurality of blocks. Each block comprises a contact surface intended to come into contact with a road surface during running. The moulding element also comprises a moulding surface for moulding the contact surfaces of the blocks. The moulding surface comprises a plurality of ribs intended to mould fine grooves in the blocks. These ribs have a height of between 0.005 and 1 mm, a width of between 0.01 mm and 0.3 mm and the pitch (P) of the ribs is between 0.1 and 2 mm. The moulding surface comprises at least one rib-free measurement zone able to accept measurement means. This measurement zone has the overall shape of a disc the diameter of which is greater than 3 mm.

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Номер записи: 23
04-07-2013 дата публикации

Motorcycle tire for uneven terrain

Номер: US20130167992A1
Автор: Masahiro Hikita
Принадлежит: Sumitomo Rubber Industries Ltd

A motorcycle tire includes a tread having shoulder blocks, and sidewalls. Each shoulder block includes a main portion and an end portion. The main portion is formed by a first crosslinked rubber composition. The end portion and the sidewalls are formed by a second crosslinked rubber composition. JIS-A hardness Ha of the main portion is greater than JIS-A hardness Hb of the end portion and the sidewalls. Difference (Ha−Hb) is greater than or equal to 5, and is not greater than 12. A ratio (H 2 /H 1 ) of a height H 2 from a boundary point Pb between the tread and each sidewall to a boundary point P 2 between the main portion and the end portion, relative to a height H 1 from the boundary point Pb to an outermost end P 1 of a corresponding one of the shoulder blocks in the axial direction, is greater than or equal to 1/3.

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Номер записи: 24
01-08-2013 дата публикации

Tire

Номер: US20130192732A1
Автор: Dyta Itoi
Принадлежит: Bridgestone Corp

An inclined groove ( 11 ) has a first inclined groove ( 101 ) and a second inclined groove ( 102 ). The first inclined groove ( 101 ) intersects a tire equator line (CL) and extends to one side (W 1 ) outward in the tire width direction proceeding from the forward side (F) to the rearward side (B) in the rotation direction. The second inclined groove ( 102 ) intersects the tire equator line (CL) and the first inclined groove ( 101 ), and extends to the other side (W 2 ) outward in the tire width direction proceeding from the forward side (F) in the rotation direction to the rearward side (B) in the rotation direction. The first inclined groove ( 101 ) and the second inclined groove ( 102 ) have forward side curved grooves ( 111 ), ( 121 ) located at the forward side (F) in the rotation direction, and rearward side curved grooves ( 112 ), ( 122 ) located at the rearward side (B) in the rotation direction.

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Номер записи: 25
08-08-2013 дата публикации

Motorcycle tire

Номер: US20130199682A1
Автор: Kouji Takenaka
Принадлежит: Sumitomo Rubber Industries Ltd

A motorcycle tire improved in transient characteristics when leaned is disclosed, wherein the tread portion has a unidirectional tread pattern comprising: inside oblique main grooves disposed on each side of the tire equator staggeredly, inclined to the axially outside toward the intended rotational direction (R) at an angle of 5 to 30 degrees with respect to the circumferential direction, and each having an inner end (Ai) at a distance of 0 to 30% of the half tread width (W) from the tire equator; and outside oblique main grooves 11 disposed on each side of the tire equator staggeredly, inclined to the axially outside toward the counter-rotational direction at an angle of 10 to 60 degrees with respect to the circumferential direction, and each having an inner end (Bi) axially inside the outer end (Ao).

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Номер записи: 26
08-08-2013 дата публикации

Needle for Inserting a Wire Into a Tire

Номер: US20130199703A1
Автор: Jean-Marie Dettorre
Принадлежит: Compagnie Generale des Etablissements Michelin SCA, Michelin Recherche et Technique SA Switzerland

The needle ( 12 ) for inserting a wire into a tire has: a piercing zone ( 18 ) having an axis of symmetry, and a duct ( 30 ) having a proximal opening and a distal opening ( 36 ) opening into the zone ( 18 ) and off-centre relative to the axis, the duct consisting of the proximal opening and of a rectilinear profiled section including the distal opening.

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Номер записи: 27
15-08-2013 дата публикации

Tire for Two-Wheeled Vehicles, Including a Tread Having Sipes

Номер: US20130206297A1
Автор: Luc Bestgen
Принадлежит: Compagnie Generale des Etablissements Michelin SCA, Michelin Recherche et Technique SA Switzerland

A tire for a motorized two-wheeled vehicle comprising a reinforcing structure of the carcass type, made up of reinforcing elements, anchored on each side of the tire to a bead the base of which is intended to be mounted on a rim seat, each bead being extended radially outwards by a sidewall, the sidewalls radially towards the outside joining to a tread comprising incisions. The length of the incisions is less than 1.2 times the width of the area of the contact patch and at least one incision has at least one end which ends in a cut in the tread the width of which is greater than 2.5 mm and the length of which is between 2.5 and 10 mm.

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Номер записи: 28
17-10-2013 дата публикации

Pneumatic tire

Номер: US20130269853A1
Автор: Kazuo Asano
Принадлежит: Sumitomo Rubber Industries Ltd

A pneumatic tire 1 includes: a tread 2 ; sidewalls 3 ; a carcass 5 ; and a belt 6 . A distribution of a thickness Tg(y) of the tread in a region extending in an axially outward direction of the tire, is represented by equation Tg(y)=A−a×Ct(y). A represents a thickness of the tread at a crown center 17 . Ct(y) represents a distribution of a displacement of the tread surface in a radially inward direction of the tire, in a region from the crown center to an end portion of the belt. a represents a coefficient selected from a range of values that are greater than or equal to 0.10, and are not greater than 0.35. A displacement Cc(y) of the carcass 5 in the radially inward direction of the tire, in a region extending in the axially outward direction of the tire from the crown center, is represented by equation Cc(y)=(1−a)×Ct(y).

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Номер записи: 29
07-11-2013 дата публикации

Pneumatic tire

Номер: US20130292021A1
Автор: Susumu Tanaka
Принадлежит: Sumitomo Rubber Industries Ltd

A pneumatic tire comprises a tread portion provided with a radially outermost breaker ply and three main grooves extending in the tire circumferential direction. Crown axial grooves disposed between the main grooves are inclined oppositely to cords of the radially outermost breaker ply, at angles in a range of from 10 to 60 degrees with respect to the tire circumferential direction. The crown axial groove comprises a narrow portion and a resultant wide portion on the axially outside thereof. The crown axial groove is provided in its axially outer end portion with a tie bar provided with a sipe.

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Номер записи: 30
14-11-2013 дата публикации

Pneumatic tire

Номер: US20130299052A1
Автор: Hideaki Minowa
Принадлежит: Bridgestone Corp

Provided is a pneumatic tire including: a belt reinforcing layer ( 12 ) having an outside end portion in the tire width direction disposed outside in the tire width direction than a tire circumferential groove ( 16 ) disposed at the outermost side in the tire width direction, in which a buttress portion ( 19 ) being positioned on the outside of a tread ( 15 ) in the tire width direction and connecting a surface ( 15 a ) of the tread ( 15 ) to a sidewall ( 20 ) is formed to have, in section in the tire width direction, an outer surface in a concave shape with a depth shallow enough not to be set into the inside in the tire width direction from the outside end of the surface ( 15 a ) of the tread ( 15 ) in the tire width direction.

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Номер записи: 31
05-12-2013 дата публикации

Tire, tread for retread tire, method for manufacturing the tread for retread tire, retread tire having the tread for retread tire, and method for manufacturing the retread tire

Номер: US20130323486A1
Автор: Takahiro Miura
Принадлежит: Bridgestone Corp

Provided are a tire having a small difference in a loss tangent (tan δ) at a tire tread outer surface position and that at a middle position, a tread for a retread tire having an even vulcanization degree in a whole tread rubber area, a tire having the tread for the retread tire, and a method for manufacturing the tire. The tire satisfies the following formula: −0.05≦(tan δ a −tan δ b )/tan δ b ≦0.05, where (tan δ a ) represents a loss tangent of strain at 2% at 25° C. in a portion (a) within 1 mm deep from a tire tread outer surface in a direction perpendicular to a tread surface, and (tan δ b ) represents a loss tangent of strain at 2% at 25° C. in a portion (b) within 2 mm from a median center between a tread portion outer surface and a bottom surface in the direction perpendicular to the tread surface.

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Номер записи: 32
16-01-2014 дата публикации

Pneumatic tire

Номер: US20140014246A1
Автор: Shungo Fujita
Принадлежит: Bridgestone Corp

An object is to enhance traction performance and handling stability performance, these being related to braking performance and acceleration performance on snowy road surfaces. A tread ( 12 ) of a pneumatic tire ( 10 ) includes: two circumferential direction main grooves ( 14 ) that are formed further to the tire width direction inside from the tread ( 12 ) ground contact edge T than positions at ⅓ of the ground contact width W and that extend along the tire circumferential direction; a central land portion row ( 16 ) formed between the two circumferential direction main grooves ( 14 ); edge land portion rows ( 18 ) respectively formed at tire width direction outsides of the two circumferential direction main grooves ( 14; and main lug grooves ( 20 ) extending in the edge land portion rows ( 18 ) from the circumferential direction main grooves ( 14 ) towards the ground contact edges T. The edge land portion rows ( 18 ) are not formed with main grooves that place tire circumferential direction neighboring main lug grooves ( 20 ) in communication with each other.

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Номер записи: 33
13-02-2014 дата публикации

Cured tread and tire

Номер: US20140041775A1
Автор: Takeo Nagahara
Принадлежит: Bridgestone Corp

The invention provides a cured tread and a tire capable of controlling irregular wear of the tread. A base tire which is to be the base for the tire and a cured tread which is to be bonded to the base tire are molded separately, and they are integrated with each other to produce the tire. The tread is provided in its width (axial) direction with a plurality of grooves extending in its length (circumferential) direction. The thickness of the tread in a width cross section gradually decreases from the equator to the equator-side edge of the outermost groove located at an axially outermost position and gradually increases from the outer edge of the outermost groove outward in the axial direction.

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Номер записи: 34
03-04-2014 дата публикации

High-performance tyre for a motor vehicle

Номер: US20140090760A1
Автор: Giuseppe Matrascia, Mauirizio Boiocchi, Vito Bello
Принадлежит: Pirelli Tyre SpA

A tyre for a motor vehicle, in particular a high-performance, tyre is provided with a tread having an overall width. The tread includes first and second circumferential grooves which separate a central region from first and second shoulder regions. The tread includes a circumferential cut in the first shoulder region at a distance from the first circumferential groove; and a plurality of circumferentially repeated transverse groove modules. A first shoulder portion of each transverse groove module includes at least one main transverse groove which includes a first substantially rectilinear portion inclined by a first angle with respect to a radial plane, a second substantially rectilinear portion inclined by a second angle with respect to the radial plane and arranged between the circumferential cut and the first circumferential groove, and a first curve portion connecting the first and the second substantially rectilinear portions.

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Номер записи: 35
06-01-2022 дата публикации

TRIAZINANES AND METHODS OF MAKING THEM

Номер: US20220002256A1
Автор: CHAPELET Judicael Jacques, FORCINITI Leandro
Принадлежит: FLEXSYS AMERICA L.P.

The present invention is directed to compounds represented by the formula: Formula (i) wherein Rcomprises a hydrogen atom or an alkyl group having 1 to 2 carbon atoms; wherein Rcomprises an alkylene group, an arylene group, or a heterocyclic group; and wherein M comprises a monovalent metallic cation such as sodium, lithium, or potassium; or a multivalent metallic cation such as zinc, nickel, iron, titanium, or cobalt; or an ammonium or alkyl ammonium cation derived by addition of proton (s) to a nitrogenous base. 2. The compound of claim 1 , wherein R1 comprises a hydrogen atom;wherein R2 comprises an alkylene group having from 1 to 5 carbon atoms; andwherein M comprises a monovalent metallic cation.3. The compound of claim 1 , wherein R1 comprises hydrogen;wherein R2 comprises an alkylene group having from 1 to 3 carbon atoms; andwherein M comprises a monovalent metallic cation or an ammonium or alkyl ammonium cation derived by addition of one or more protons to a nitrogenous base.4. Sodium S claim 1 ,S′ claim 1 ,S″-((1 claim 1 ,3 claim 1 ,5-triazinane-1 claim 1 ,3 claim 1 ,5-triyl)tris(ethane-2 claim 1 ,1-diyl)) tris(sulfurothioate).5. Sodium S claim 1 ,S′ claim 1 ,S″-((1 claim 1 ,3 claim 1 ,5-triazinane-1 claim 1 ,3 claim 1 ,5-triyl)tris(propane-3 claim 1 ,1-diyl)) tris(sulfurothioate).6. Sodium S claim 1 ,S′ claim 1 ,S″-((1 claim 1 ,3 claim 1 ,5-triazinane-1 claim 1 ,3 claim 1 ,5-triyl)tris(butane-4 claim 1 ,1-diyl)) tris(sulfurothioate).7. Sodium S claim 1 ,S′ claim 1 ,S″-((1 claim 1 ,3 claim 1 ,5-triazinane-1 claim 1 ,3 claim 1 ,5-triyl)tris(pentane-5 claim 1 ,1-diyl)) tris(sulfurothioate).8. A method of making the compound of claim 1 , comprising:reacting a haloalkylamine hydrohalide with a metal thiosulfate to obtain an alkylammonium halide thiosulfate metal salt;deprotonating the alkylammonium halide thiosulfate metal salt to obtain an alkylammonium thiosulfate metal salt; and{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'reacting the alkylammonium ...

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Номер записи: 36
07-01-2021 дата публикации

TYRE

Номер: US20210001669A1
Автор: MATSUMOTO Tadao
Принадлежит: SUMITOMO RUBBER INDUSTRIES, LTD.

A tyre includes a tread portion being provided with at least one main groove extending in a tyre circumferential direction and at least one lateral groove connected to the at least one main groove. The at least one main groove includes an intersection to which the lateral groove is connected. One of groove walls of the at least one main groove or the at least one lateral groove is provided with projections protruding toward the intersection. 1. A tyre comprising:a tread portion being provided with at least one main groove extending in a tyre circumferential direction and at least one lateral groove connected to the at least one main groove,the at least one main groove comprising an intersection to which the at least one lateral groove is connected, andone of groove walls of the at least one main groove or the at least one lateral groove being provided with projections protruding toward the intersection.2. The tyre according to claim 1 , whereineach of the projections, in a cross-section parallel to a ground contact surface of the tread portion, has a top portion located farthest from the one of the groove walls and a base portion connected to the one of the groove walls, andthe top portion is located on the intersection side with respect to a center position of the base portion in a direction parallel to the one of the groove walls.3. The tyre according to claim 2 , whereineach of the projections, in a cross-section parallel to a ground contact surface of the tread portion, comprises a triangular shape portion having the top portion as one of vertex of the triangular shape portion.4. The tyre according to claim 1 , whereineach projection has a height from the one of groove walls in a range from 10% to 30% of a groove width of the at least one main groove or the lateral groove on which the projection is provided.5. The tyre according to claim 1 , whereineach of the projections, in a front view of the one of the groove walls, extends in a tyre radial direction.6. The ...

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Номер записи: 37
05-01-2017 дата публикации

Tire Tread For Heavy Vehicle Of Construction Plant Tire

Номер: US20170001475A1
Автор: Bondu Lucien
Принадлежит:

Tire () for a heavy vehicle of construction plant type with tread () comprising raised elements (), separated by grooves (), extending radially outwards from a bottom surface () as far as a contact face () over a height (H) and comprising base compound () and coating compound (). Coating compound () has a constant maximum thickness (e), at the contact face () of each raised element (), at most equal to 0.15 H, the coating compound () has a constant minimum thickness (e), at each groove bottom (), at least equal to 0.04 H, and the elongation at break at 23° C. Aof the coating compound () is at least equal to 1.05 times the elongation at break of 23° C. Aof the base compound (). 1. A tire for a heavy vehicle of construction plant type , comprising:a tread comprising raised elements separated by grooves;each raised element extending radially outwards from a bottom surface as far as a contact face over a height H and comprising lateral faces;each said groove being a cut in the tread which cut is delimited laterally by lateral faces of raised elements that face one another and is delimited radially towards the inside by a groove bottom resting on the bottom surface;the tread comprising at least one first elastomeric compound, referred to as base compound, and at least one second elastomeric compound, referred to as painting compound, fully covering the base compound;{'sub': R1', 'R2, 'the base compound and coating compound respectively having elongations at break at 23° C. Aand A;'}{'sub': max', 'min', 'R2', 'R1, 'wherein the coating compound has a constant maximum thickness e, at the contact face of each raised element, at most equal to 0.15 times the height H of the raised element, wherein the coating compound has a constant minimum thickness e, at each groove bottom, at least equal to 0.04 times the height H of the raised element, and wherein the elongation at break at 23° C. Aof the coating compound is at least equal to 1.05 times the elongation at break at 23° C. ...

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Номер записи: 38
05-01-2017 дата публикации

Tire With Improved Tread

Номер: US20170001476A1
Автор: Emmanuel Igier, Francois-Xavier Bruneau, Frederic Bourgeois, Patrice Fraysse
Принадлежит: Compagnie Generale des Etablissements Michelin SCA, Michelin Recherche et Technique SA France

Tire comprising a tread having a first lateral rib ( 421 ) adjacent to the outer axial edge of the tread and a central rib with a first portion ( 4211, 4111, 4121, 4131 ) having axial width exceeding 20% the axial width of the relevant rib made from a rubber composition containing an elastomer and a reinforcing filler consisting predominantly of carbon black. Axially adjacent second portion ( 4212, 4112, 4122, 4132 ) is made of a rubber composition containing an elastomer and a reinforcing filler a minority proportion of which consists of carbon black. The rubber compositions that make up the respective second portions of the first lateral rib and the central rib all have a tan δ0 value which is less than the tan δ0 value of the rubber compositions that form the respective first portions of the first lateral rib and the central rib.

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Номер записи: 39
05-01-2017 дата публикации

TYRE FOR VEHICLE WHEELS HAVING IMPROVED TREAD PATTERN

Номер: US20170001477A1
Автор: Boiocchi Maurizio, BOLZONI Roberto, COLOMBO Gianfranco, MONTESELLO Stefano
Принадлежит: PIRELLI TYRE S.P.A.

Tire for vehicle wheels includes a tread pattern defined by modules arranged circumferentially along the tread, each of the modules including: a) a first slanted transverse groove extending from a first shoulder portion in the first half of the tread to a first end located in the second half of the tread; b) a second slanted transverse groove extending from a second shoulder portion in the second half of the tread to a second end located in the first half of the tread; c) a third slanted transverse groove extending from the first shoulder portion to a third end located in the first half of the tread; d) a fourth slanted transverse groove extending from the second shoulder portion to a fourth end located in the second half of the tread; wherein: e) the first end is substantially located at an intermediate portion of the second slanted transverse groove; and f) the second end is substantially located at an intermediate portion of the first slanted transverse groove of a circumferentially adjacent module. 117-. (canceled)18. A tyre for a vehicle wheel comprising a tread having a tread pattern , said tread being separable by an equatorial plane of said tyre in a first half and in a second half , said first half of said tread comprising a first shoulder portion of said tread , said second half of said tread comprising a second shoulder portion of said tread , wherein said tread pattern comprises a sequence of substantially identical modules of grooves circumferentially disposed along said tread , each of said modules comprising:a) a first slanted transverse groove extending from said first shoulder portion of said tread to a first end, said first slanted transverse groove crossing said equatorial plane so that said first end is located in said second half of said tread;b) a second slanted transverse groove extending from said second shoulder portion of said tread to a second end,said second slanted transverse groove crossing said equatorial plane so that said second end ...

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Номер записи: 40
05-01-2017 дата публикации

TREAD FOR HEAVY-GOODS VEHICLE TIRE

Номер: US20170001478A1
Автор: CRESS Ronnie, Marlier Fabien, MOORE Ralston, ROLLAND Maxime
Принадлежит:

The tread has a total axial width W and a wearable thickness PMU of material and has at least four grooves on each side of a midplane that divides the tread axially into two parts. The grooves divide the tread into a middle, intermediate and edge regions The middle region has an axial width Lm of at least 30% and at most 60% of the total width W. The total volume void ratio when new is less than 17%, and the middle region has a volume void ratio that is less than half the total volume void ratio. The middle region comprises a plurality of transverse sipes opening into the grooves, and the sipes have depths at least equal to 75% of the depth of the grooves. The number of transverse sipes in the middle region is greater than the number of transverse sipes on each intermediate or edge region. 1. A tread for a heavy vehicle tire ,said tread having a total axial width W and a wearable thickness PMU of material,said tread being provided with at least four grooves of circumferential overall orientation on each side of a midplane that divides said tread axially into two parts of equal width,said grooves of circumferential overall orientation dividing said tread into a middle region, intermediate regions axially on each side of said middle region and edge regions axially delimiting said tread,said middle region being defined as a region of said tread situated between the two circumferential grooves that are axially most closely spaced on each side of said midplane,said middle region having an axial width Lm at least equal to 30% and at most equal to 60% of said total width W of said tread,a total volume void ratio of said tread when new is less than 17%, said void ratio being calculated as a ratio between a total void volume and a total volume of tread including all voids and evaluated between a tread surface when new and an internal surface extending in said tread parallel to said tread surface when new,said internal surface being in contact radially on the inside with ...

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Номер записи: 41
05-01-2017 дата публикации

Pneumatic Tire

Номер: US20170001479A1
Автор: Yasuhiro Takahashi
Принадлежит: Yokohama Rubber Co Ltd

A tread pattern of a pneumatic tire includes a land portion being continuous around an entire circumference of the tire and continuous from a first circumferential groove to a tire ground contact edge in a tire width direction; a first inclined groove that extends in the tire circumferential direction from a position spaced outwardly apart from the first circumferential groove in the tire width direction, a first lug groove that extends from an outward end portion in the tire width direction of the first inclined groove to the ground contact edge, and a second inclined groove shorter in the tire circumferential direction than the first inclined groove, the second inclined groove extending from a land portion spaced apart from the first inclined groove and the first lug groove in the tire circumferential direction to a portion where the first incline groove and the first lug groove connect.

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Номер записи: 42
07-01-2016 дата публикации

Pneumatic Tire

Номер: US20160001599A1
Автор: Kubota Masataka, Minami Yuji
Принадлежит:

The present technology relates to a pneumatic tire in which the ratio of the total width SW and the outer diameter OD satisfies SW/OD≦0.3, and grooves are provided on the tread portion. In the ground contact region of the tread portion, when the groove area ratio in the ground contact area is GR, the ground contact width is W, the region having a width of 50% of the ground contact width W and the tire equatorial plane as center is the center region, the groove area ratio in the center region is GCR, the ground contact region on the outer side in the tire width direction of the center region is the shoulder region, and the groove area ratio in the shoulder region is GSR, the ground contact region of the tread portion is formed to satisfy 10%≦GR≦25% and GCR>GSR. 1. A pneumatic tire comprising grooves on a tread portion , {'br': None, 'i': 'SW/OD≦', '0.3, and'}, 'the ratio of a total width SW and an outer diameter OD of the pneumatic tire SW/OD satisfyingin a ground contact region of the tread portion, when a groove area ratio in a ground contact area is GR, a ground contact width is W, a region having a width of 50% of the ground contact width W and a tire equatorial plane as center is a center region AC, a groove area ratio in the center region AC is GCR, a ground contact region on an outer side in a tire width direction from the center region AC is a shoulder region AS, and a groove area ratio in the shoulder region AS is GSR, [{'br': None, 'i': 'GR≦', '10%≦25%, and'}, {'br': None, 'i': 'GCR>GSR.'}], 'the ground contact region of the tread portion being formed to satisfy2. The pneumatic tire according to claim 1 , wherein the ratio of GCR and GSR satisfies:{'br': None, 'i': 'GSR/GCR≦', '0<0.6.'}3. The pneumatic tire according to claim 1 , wherein at least two lateral grooves extending from a ground contact width edge located in the shoulder region toward a tire equatorial line are provided in the ground contact region of the tread portion claim 1 , and {'br': None, ...

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Номер записи: 43
07-01-2016 дата публикации

Pneumatic tire

Номер: US20160001603A1
Автор: Masataka Kubota, Yuji Minami
Принадлежит: Yokhama Rubber Co Ltd

A ratio between the total width (SW) and outer diameter (OD) of a pneumatic tire, which has an asymmetrical pattern formed by grooves formed on a tread part, satisfies SW/OD≦0.3. Given a ground contact width (CW) in a ground contact region in the tread part, a groove area ratio (GR), and a groove area ratio (GRi) of a tire inner side region (Ai), which spans from a tire equator line (CL) to the vehicle side in the ground contact region, and a groove area ratio (GRo) of a tire outer side region (Ao), which spans from the tire equator line to the opposite side of the vehicle side in the ground contact region, the ground contact region is formed to satisfy 0.75≦CW/SW≦0.9, 10≦GR≦25%, and GRi<GRo.

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Номер записи: 44
02-01-2020 дата публикации

PNEUMATIC TIRE

Номер: US20200001653A1
Автор: Nishio Taiichi
Принадлежит: Toyo Tire Corporation

A pneumatic tire in which a plurality of sipes are formed in land sections of a tread and at least one of end parts in an extending direction of each sipe is an end part in the land section that is blocked in the land section, in which holes separated from the sipes are formed on line segments L connecting the end parts in the land section of adjacent two sipes to each other, and the hole has a circular shape or an elliptical shape in plan view, a diameter of which becomes smaller as coming toward a deeper position. 1. A pneumatic tire in which a plurality of sipes are formed in land sections of a tread and at least one of end parts in an extending direction of each sipe is an end part in the land section that is blocked in the land section ,wherein holes separated from the sipes are formed on line segments connecting the end parts in the land section of adjacent two sipes to each other, andthe hole has a circular shape or an elliptical shape in plan view, a diameter of which becomes smaller as coming toward a deeper position.2. The pneumatic tire according to claim 1 ,wherein one hole is formed on the line segment, andthe hole is formed in a central position of the line segment.3. The pneumatic tire according to claim 1 ,wherein a depth of the hole is 50% or more to 100% or less of a depth of the sipe.4. The pneumatic tire according to claim 1 ,wherein an inner wall extending from an opening end toward a bottom part of the hole is a curved surface warped in a direction of reducing a capacity of the hole.5. The pneumatic tire according to claim 1 ,wherein the holes formed in a center region of the tread have an elliptical shape elongated in a tire circumferential direction in plan view.6. The pneumatic tire according to claim 1 ,wherein the holes formed in shoulder regions of the tread have an elliptical shape elongated in a tire width direction in plan view.7. The pneumatic tire according to claim 5 ,wherein the holes formed in shoulder regions of the tread have an ...

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Номер записи: 45
02-01-2020 дата публикации

Pneumatic Tire

Номер: US20200001654A1
Автор: Kubota Masataka, KUWAHARA Noboru
Принадлежит:

A pneumatic tire includes circumferential main grooves extending in the tire circumferential direction and a land portion defined by the circumferential main grooves. The land portion includes a through lug groove that passes through the land portion in the tire lateral direction and includes first and second chamfered portions formed on left and right edge portions of the through lug groove. The first chamfered portion opens at one end to one of the edge portions of the land portion and terminates at the other end at a central portion in the groove length direction of the through lug groove. The second chamfered portion opens at one end portion to one of the edge portions of the land portion and terminates at the other end portion at a central portion in the groove length direction of the through lug groove. 1. A pneumatic tire , comprising:a circumferential main groove extending in a tire circumferential direction; anda land portion defined and formed by the circumferential main groove;the land portion comprisinga through lug groove extending through the land portion in a tire lateral direction, anda first chamfered portion and a second chamfered portion formed on left and right edge portions of the through lug groove;the first chamfered portion opening at one end portion to an edge portion of the land portion and terminating at another end portion at a central portion in a groove length direction of the through lug groove; andthe second chamfered portion opening at one end portion to another edge portion of the land portion and terminating at another end portion at the central portion in the groove length direction of the through lug groove.2. The pneumatic tire according to claim 1 , wherein{'b': 1', '1', '2', '1', '1', '2', '1, 'a width W of the land portion, an extension distance D of the first chamfered portion in the tire lateral direction, and an extension distance D of the second chamfered portion in the tire lateral direction satisfy relationships 0.40≤D/ ...

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Номер записи: 46
02-01-2020 дата публикации

Lateral discontinuities having thicknesses increasing from shoulder to center of tire tread

Номер: US20200001656A1
Автор: John Limroth, Mark Collett
Принадлежит: Compagnie Generale des Etablissements Michelin SCA

Embodiments include a tire tread having a plurality of tread elements and a plurality of lateral discontinuities arranged along the tread width and tread length, each of the plurality of tread elements being spaced apart by one of the plurality of lateral discontinuities. The tread width is divided into a plurality of regions, the plurality of regions including: (1) a pair of outermost regions, each outermost region being arranged closest to one of the pair of opposing lateral sides of the tread, and (2) at least one centermost region is arranged closest to the longitudinal centerline of the tread. Each of the lateral discontinuities have a thickness, where the thickness of one or more of the lateral discontinuities arranged in each of the outermost regions is smaller than the thickness of one or more of the lateral discontinuities arranged in the centermost region.

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Номер записи: 47
02-01-2020 дата публикации

PNEUMATIC TIRE

Номер: US20200001657A1
Автор: Matsubara Keisuke
Принадлежит: Toyo Tire Corporation

A pneumatic tire includes a sipe line that is a line constituted of continuation of the sipe. The sipe line extends from one grounding end toward the other grounding end of the tread portion and has an amplitude in both a tire circumferential direction and a tire width direction. 1. A pneumatic tire comprising:a plurality of main grooves formed in a tread portion so as to extend in a tire circumferential direction;a plurality of land portions defined by at least the main grooves; anda plurality of sipes respectively formed on the land portions, wherein a sipe line that is a line constituted of continuation of the sipe extends from one grounding end toward the other grounding end of the tread portion and has an amplitude in both a tire circumferential direction and a tire width direction.2. The pneumatic tire according to claim 1 , wherein the sipe line includesa first circumferential protrusion portion that projects in one direction of the tire circumferential direction,a second circumferential protrusion portion that projects in a direction opposite to the direction of the tire circumferential direction,a first widthwise protrusion portion that projects in one direction of the tire width direction, anda second widthwise protrusion portion that projects in a direction opposite to the direction of the tire width direction.3. The pneumatic tire according to claim 2 , wherein the first widthwise protrusion portion and the second widthwise protrusion portion are positioned between the first circumferential protrusion portion and the second circumferential protrusion portion.4. The pneumatic tire according to claim 2 , further comprising:a plurality of lateral grooves formed on the tread portion so as to extend in a direction intersecting with the tire circumferential direction, whereinthe main groove includes a pair of center main grooves arranged adjacent to each other across a center line of the tread portion in a tire width direction, andboth the first widthwise ...

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Номер записи: 48
02-01-2020 дата публикации

PNEUMATIC TIRE

Номер: US20200001658A1
Автор: Tanaka Masaya
Принадлежит: Toyo Tire Corporation

A center sipe formed in a center block does not have a bend portion. The center sipe crosses the center block in the tire width direction. Both end portions of the center sipe are positioned in a range of 55% or more and 85% or less of a dimension in the tire circumferential direction of the center block from both end portions in the tire circumferential direction of the center block. The center sipe has an amplitude of an amount of 60% or more and 85% or less of a dimension in the tire width direction of the center block. 1. A pneumatic tire , comprising:a pair of center main grooves that are formed in a tread portion so as to extend in a tire circumferential direction and are arranged adjacent to each other across a center line of the tread portion in a tire width direction;a plurality of lateral grooves formed on the tread portion so as to extend in a direction intersecting with the tire circumferential direction;a center block defined by the center main grooves and the lateral grooves; anda center sipe that is formed on the center block and does not have a bent portion, whereinthe center sipe extends from one side portion to the other side portion of the center block in the tire width direction and crosses the center block in the tire width direction,both end portions of the center sipe are positioned in a range of 55% or more and 85% or less of a dimension in the tire circumferential direction of the center block from both end portions in the tire circumferential direction of the center block, andthe center sipe has, in the tire width direction, an amplitude of an amount of 60% or more and 85% or less of a dimension in the tire width direction of the center block.2. The pneumatic tire according to claim 1 , wherein a first widthwise protrusion portion that projects in one direction of the tire width direction, and', 'a second widthwise protrusion portion that projects in a direction opposite to the direction of the tire width direction, and, 'the center sipe ...

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Номер записи: 49
02-01-2020 дата публикации

PNEUMATIC TIRE

Номер: US20200001659A1
Автор: Tanaka Masaya
Принадлежит: Toyo Tire Corporation

A shoulder block is formed with a first shoulder sipe and a second shoulder sipe that extend from a grounding end toward a shoulder main groove and have an end portion that terminates in the shoulder block. The end portion of the first shoulder sipe and the end portion of the second shoulder sipe are different in position of a tire width direction. 1. A pneumatic tire , comprising:a shoulder main groove formed on a tread portion so as to extend in a tire circumferential direction on a grounding end side;a plurality of lateral grooves formed on the tread portion so as to extend in a direction intersecting with the tire circumferential direction;a shoulder block defined by the shoulder main groove and the lateral grooves;a first shoulder sipe that is formed on the shoulder block, extends from the grounding end toward the shoulder main groove, and has an end portion that terminates in the shoulder block; anda second shoulder sipe that is formed in the shoulder block at an interval in the tire circumferential direction with respect to the first shoulder sipe, extends from the grounding end toward the shoulder main groove, and has an end portion that terminates in the shoulder block,wherein the end portion of the first shoulder sipe and the end portion of the second shoulder sipe are different in position of a tire width direction.2. The pneumatic tire according to claim 1 , wherein a difference between a distance from the end portion of the first shoulder sipe to the shoulder main groove and a distance from the end portion of the second shoulder sipe to the shoulder main groove is 2 mm or more and 15 mm or less.3. The pneumatic tire according to claim 1 , wherein a first portion that includes the end portion and extends in a first direction, and', 'a second portion that is continuous to the first portion and extends at an angle different from the first direction., 'each of the first and second shoulder sipes has'}4. The pneumatic tire according to claim 2 , wherein a ...

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Номер записи: 50
02-01-2020 дата публикации

PNEUMATIC TIRE

Номер: US20200001660A1
Автор: Nishio Taiichi
Принадлежит: Toyo Tire Corporation

To provide a pneumatic tire in which sipes are formed in a land section of a tread, at least one of end parts in an extending direction of each sipe is an end part in the land section that is blocked in the land section, and holes continue from the end parts in the land section with a circular shape or an elliptical shape in plan view are formed, in which a portion from an opening end to a bottom part of the hole continues from the end part in the land section, and a diameter of the hole is reduced as coming toward a deeper position. 1. A pneumatic tire in which sipes are formed in land sections of a tread , at least one of end parts in an extending direction of each sipe is an end part in the land section that is blocked in the land section , and holes continuing from the end parts in the land section with a circular shape or an elliptical shape in plan view are formed ,wherein a portion from an opening end to a bottom part of each hole continues from the end part in the land section, and a diameter of the hole is reduced as coming toward a deeper position.2. The pneumatic tire according to claim 1 ,wherein a depth of the hole is 50% or more to 100% or less of a depth of the sipe.3. The pneumatic tire according to claim 1 ,wherein an inner wall extending from the opening end toward the bottom part of the hole is a curved surface warped in a direction of reducing a capacity of the hole.4. The pneumatic tire according to claim 1 ,wherein the holes formed in a center region of the tread have an elliptical shape elongated in a tire circumferential direction in plan view.5. The pneumatic tire according to claim 1 ,wherein the holes formed in shoulder regions of the tread have an elliptical shape elongated in a tire width direction in plan view.6. The pneumatic tire according to claim 4 ,wherein the holes formed in shoulder regions of the tread have an elliptical shape elongated in a tire width direction in plan view. The present application claims priority from Japanese ...

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Номер записи: 51
02-01-2020 дата публикации

PNEUMATIC TIRE

Номер: US20200001661A1
Автор: Ohara Masaaki
Принадлежит: Toyo Tire Corporation

A pneumatic tire includes, in a tread portion, a plurality of blocks formed by a plurality of main grooves extending in a tire circumferential direction and a plurality of lateral grooves extending in a tire width direction so as to intersect the main grooves. The lateral grooves each include a reinforcement region in which a plurality of projecting portions are formed at a groove bottom. In the reinforcement region, at least one projecting portion is arranged on any line extending in the tire circumferential direction. 1. A pneumatic tire comprising , in a tread portion , a plurality of blocks formed by a plurality of main grooves extending in a tire circumferential direction and a plurality of lateral grooves extending in a tire width direction so as to intersect the main grooves ,wherein the lateral grooves each include a reinforcement region in which a plurality of projecting portions are formed at a groove bottom, andwherein, in the reinforcement region, at least one projecting portion is arranged on any line extending in the tire circumferential direction.2. The pneumatic tire according to claim 1 , wherein the reinforcement region is provided at an intermediate portion in the tire circumferential direction in the groove bottom of each of the lateral grooves.3. The pneumatic tire according to claim 1 ,wherein the groove bottom of each of the lateral grooves includes a bottom surface between blocks adjacent to each other in the tire circumferential direction, and curved surfaces connecting side surfaces of the blocks and the bottom surface, andwherein the projecting portions are provided on the bottom surface.4. The pneumatic tire according to claim 2 ,wherein the groove bottom of each of the lateral grooves includes a bottom surface between blocks adjacent to each other in the tire circumferential direction, and curved surfaces connecting side surfaces of the blocks and the bottom surface, andwherein the projecting portions are provided on the bottom surface.5 ...

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Номер записи: 52
02-01-2020 дата публикации

PNEUMATIC TIRE

Номер: US20200001666A1
Автор: Sakakibara Kazuhiro
Принадлежит: Toyo Tire Corporation

A pneumatic tire includes: a tread portion; and a sponge member extending in a tire circumferential direction and attached to a tire inner peripheral surface of the tread portion over an entire circumference thereof. The sponge member includes: a base portion attached to the tire inner peripheral surface of the tread portion; a plurality of protrusions protruding inward in a tire radial direction from the base portion and extending in a tire width direction, the protrusions being formed at intervals in the tire circumferential direction; and a plurality of recesses formed between the plurality of protrusions. Corner R portions are formed in bottom corners of the recesses. A curvature radius of the corner R portions is larger than 25% of a width of the recesses in the tire circumferential direction. 1. A pneumatic tire comprising: a tread portion; and a sponge member extending in a tire circumferential direction and attached to a tire inner peripheral surface of the tread portion over an entire circumference thereof ,wherein the sponge member includes:a base portion attached to the tire inner peripheral surface of the tread portion;a plurality of protrusions protruding inward in a tire radial direction from the base portion and extending in a tire width direction, the protrusions being formed at intervals in the tire circumferential direction; anda plurality of recesses formed between the plurality of protrusions,corner R portions are formed in bottom corners of the recesses, anda curvature radius of the corner R portions is larger than 25% of a width of the recesses in the tire circumferential direction.2. The pneumatic tire according to claim 1 , whereineach of the recesses is formed as a semicircular arc portion protruding outward in the tire radial direction with a width in the tire circumferential direction as a diameter.3. The pneumatic tire according to claim 1 , whereina plurality of small protrusions protruding inward in the tire radial direction and ...

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Номер записи: 53
04-01-2018 дата публикации

Pneumatic tire

Номер: US20180001708A1
Автор: Tsuyoshi Fujioka
Принадлежит: Toyo Tire and Rubber Co Ltd

A pneumatic tire includes a tread portion that is provided with two block rows formed of three circumferential grooves and a plurality of first transverse grooves. A block that configures the block rows has a hexagonal shape, and has a diagonal extension line passing through a pair of vertices positioned in the central portion in the tire-circumferential direction, the diagonal extension line overlapping, in the tire-circumferential direction, the first transverse groove of the adjacent block rows. The block has a first sipe that is terminated within a block extending in the tire-width direction. The first sipe is provided at a position shifted from the diagonal extension line in the tire-circumferential direction and in a region interposed between planes that are formed by extending, in a direction in which the first transverse groove extends, from a pair of groove wall surfaces of the first transverse groove of the adjacent block rows.

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Номер записи: 54
04-01-2018 дата публикации

PNEUMATIC TIRE

Номер: US20180001709A1
Автор: Fujioka Tsuyoshi
Принадлежит: TOYO TIRE & RUBBER CO., LTD.

In a pneumatic tire having main grooves extending in a tire circumferential direction and land portions partitioned by the main grooves in a tread portion, a plurality of protrusions are disposed at a groove bottom of the main groove at intervals in a groove length direction, and a side surface portion of the protrusion is connected to a side surface portion of the land portion via a connecting portion having a height equal to or less than a height of the protrusion and a width narrower than a width of the protrusion. 1. A pneumatic tire comprising:a tread portion including a main groove extending in a tire circumferential direction; and a land portion partitioned by the main groove,wherein a plurality of protrusions are disposed at a groove bottom of the main groove at intervals in a groove length direction, and a side surface portion of at least one protrusions is connected to a side surface portion of the land portion via a connecting portion having a height equal to or less than a height of the protrusion and a width narrower than a width of the protrusion.2. The pneumatic tire according to claim 1 , comprising:blocks which are formed by a plurality of main grooves extending in the tire circumferential direction and a plurality of lateral grooves extending in a direction intersecting the main grooves,wherein the side surface portion of the protrusion and a side surface portion of the block facing the side surface portion of the protrusion are connected via the connecting portion.3. The pneumatic tire according to claim 1 ,wherein the connecting portions are provided alternately on right and left in the groove length direction with respect to the side surface portions of the land portions on both sides of the main groove.4. The pneumatic tire according to claim 1 ,wherein the connecting portion is provided within a range excluding 5% of a length at both ends of the protrusion in a longitudinal direction at the side surface portion of the protrusion.5. The ...

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Номер записи: 55
04-01-2018 дата публикации

PNEUMATIC TIRE

Номер: US20180001710A1
Автор: Fujioka Tsuyoshi
Принадлежит: TOYO TIRE & RUBBER CO., LTD.

A block includes a pair of longitudinal side surface portions facing the main grooves and a pair of lateral side surface portions facing the lateral grooves. The pair of longitudinal side surface portions includes a pair of first longitudinal side surface portions that has ridgelines inclined with respect to the tire circumferential direction, and a pair of second longitudinal side surface portions that has ridgelines shorter than ridgelines of the first longitudinal side surface portions and inclined greater than the ridgelines of the first longitudinal side surface portions. In the shoulder block, notches are provided at a central portion of the pair of first longitudinal side surface portions, a first sipe that is opened to the notches and connects the notches on both sides is provided, and second sipes of which the both ends terminate within the block are provided on both sides of the first sipe. 1. A pneumatic tire comprising:a tread portion which is provided with a plurality of main grooves extending in a tire circumferential direction, and a plurality of lateral grooves extending in a direction intersecting the main grooves, to form block rows,wherein at least one block row sandwiched between the main grooves includes blocks having a pair of longitudinal side surface portions facing the main grooves and a pair of lateral side surface portions facing the lateral grooves, in which the pair of longitudinal side surface portions includes a pair of first longitudinal side surface portions that has ridgelines inclined with respect to the tire circumferential direction, and a pair of second longitudinal side surface portions that has ridgelines shorter than the ridgelines of the first longitudinal side surface portions and inclined greater with respect to the tire circumferential direction than the ridgelines of the first longitudinal side surface portions, and intersects the first longitudinal side surface portions at an obtuse angle, andwherein the block comprises ...

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Номер записи: 56
04-01-2018 дата публикации

PNEUMATIC TIRE

Номер: US20180001711A1
Автор: Fujioka Tsuyoshi
Принадлежит: TOYO TIRE & RUBBER CO., LTD.

In a pneumatic tire, three or four zigzag main grooves extending in a tire circumferential direction with amplitude in a tire width direction, a plurality of lateral grooves extending in a direction intersecting the main grooves, and block rows formed by the main grooves and the lateral grooves are provided at a tread portion. When a tire is grounded, a ratio of a total sum of lengths of groove center lines of the main grooves in a ground contact surface to a total sum of lengths of amplitude center lines of the main grooves in the ground contact surface is set to 1.05 to 1.25. 1. A pneumatic tire comprising:a tread portion which is provided with three or four zigzag main grooves extending in a tire circumferential direction with amplitude in a tire width direction, a plurality of lateral grooves extending in a direction intersecting the main grooves, and block rows formed by the main grooves and the lateral grooves,wherein the tread portion has a ground contact surface when a tire is grounded, and a ratio LA/LB of a total sum LA of lengths of groove center lines of the main grooves in the ground contact surface to a total sum LB of lengths of amplitude center lines of the main grooves in the ground contact surface is 1.05 to 1.25.2. The pneumatic tire according to claim 1 ,wherein a ratio LC/LA of a total sum LC of lengths of groove center lines of the lateral grooves in the ground contact surface to the total sum LA of the lengths of the groove center lines of the main grooves in the ground contact surface is 0.50 to 1.00.3. The pneumatic tire according to claim 1 ,wherein a ratio LD/LE of a ground contact length LD in the ground contact surface to a ground contact width LE in the ground contact surface is 0.9 or more.4. The pneumatic tire according to claim 1 ,wherein the main grooves are zigzag grooves which comprises first groove portions which are inclined with respect to the tire circumferential direction and second groove portions which are shorter than the ...

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Номер записи: 57
04-01-2018 дата публикации

PNEUMATIC TIRE

Номер: US20180001712A1
Автор: Fujioka Tsuyoshi
Принадлежит: TOYO TIRE & RUBBER CO., LTD.

In a shoulder block row in which a plurality of shoulder blocks are disposed in a tire circumferential direction, a lateral groove between adjacent shoulder blocks in the tire circumferential direction has a first shallow groove portion that is positioned on a side close to a main groove and has a depth shallower than that of the main groove, a third shallow groove portion that is positioned on a side close to a tire ground contact end and has a depth shallower than that of the main groove, and a second shallow groove portion that is positioned between the first shallow groove portion and the third shallow groove portion, and has a depth shallower than those of the first shallow groove portion and the third shallow groove portion. 1. A pneumatic tire comprising:a tread portion, wherein a shoulder block row in which a plurality of shoulder blocks partitioned by lateral grooves between a main groove extending in a tire circumferential direction and a tire ground contact end are arranged in the tire circumferential direction, are provided at an end portion of the tread portion in a tire width direction,wherein the lateral groove between adjacent shoulder blocks in the tire circumferential direction includes a first shallow groove portion that is positioned on a side close to the main groove and has a depth shallower than that of the main groove, a third shallow groove portion that is positioned on a side close to the tire ground contact end and has a depth shallower than that of the main groove, and a second shallow groove portion that is positioned between the first shallow groove portion and the third shallow groove portion, and has a depth shallower than those of the first shallow groove portion and the third shallow groove portion.2. The pneumatic tire according to claim 1 ,wherein a center position of the second shallow groove portion in the tire width direction is positioned closer to a tire ground contact end side than a center position of the lateral groove in ...

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Номер записи: 58
04-01-2018 дата публикации

PNEUMATIC TIRE

Номер: US20180001713A1
Автор: Fujioka Tsuyoshi
Принадлежит: TOYO TIRE & RUBBER CO., LTD.

In a pneumatic tire, a plurality of main grooves extending in a tire circumferential direction, a plurality of lateral grooves extending in a direction intersecting the main grooves, and block rows formed by the main grooves and the lateral grooves is provided at a tread portion. Recessed notches extending from a block upper surface to a block bottom portion are respectively provided in side surface portions of the blocks facing each other with the main groove interposed therebetween, and a reinforcing projection portion connecting the notches is provided in the groove bottom of the main groove. 1. A pneumatic tire comprising:a tread portion including a plurality of main grooves extending in a tire circumferential direction, a plurality of lateral grooves extending in a direction intersecting the main grooves, and block rows formed by the main grooves and the lateral grooves, and having a plurality of blocks in a tire circumferential direction,wherein recessed notches extending from a block upper surface toward a block bottom portion are respectively provided in side surface portions of the blocks facing each other with the main groove interposed therebetween, and a reinforcing projection portion connecting the notches is provided in a groove bottom of the main groove.2. The pneumatic tire according to claim 1 ,wherein the reinforcing projection portion includes a lateral component extending in a direction crossing the main groove and a longitudinal component extending in a length direction of the main groove.3. The pneumatic tire according to claim 2 ,wherein an amount of extension of the longitudinal component in the length direction of the main groove is 40% or more of a width of the lateral component.4. The pneumatic tire according to claim 2 ,wherein the reinforcing projection portions is a crack-shaped projection portion formed by connecting a pair of the lateral components respectively extending from a pair of notches facing each other to be a bent shape via ...

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Номер записи: 59
04-01-2018 дата публикации

Pneumatic Tire

Номер: US20180001714A1
Автор: HAMANAKA Hideki, KAKUTA Shoei, Sato Toshiyuki, TAUCHI Risa, Yamaguchi Yukihito
Принадлежит:

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. 1. A heavy duty pneumatic tire comprisinga tread portion provided with a tread pattern,the tread pattern comprising:a plurality of center lug grooves disposed at intervals in a tire circumferential direction that extend crossing a tire equator line, the plurality of center lug grooves each comprising:a first groove turning portion that turns with a bent shape or a curved shape and a first end, the first groove turning portion and the first end being located in a half-tread region that is on a first side of the tire equator line in a tire width direction, anda second groove turning portion that turns with a bent shape or a curved shape and a second end, the second groove turning portion and the second end being located in a half-tread region on a second side in the tire width direction;a plurality of shoulder lug grooves disposed in the intervals in the tire circumferential direction between the plurality of center lug grooves in both of the half-tread regions that extend outward in the tire width direction, the plurality of shoulder lug grooves each comprising:an outer ...

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Номер записи: 60
04-01-2018 дата публикации

TIRE TREAD FOR REDUCING NOISE

Номер: US20180001715A1
Автор: Tezuka Takashi
Принадлежит:

Present disclosure provide a tread for a tire having a plurality of grooves formed in the tread, a plurality of contact elements delimited by a plurality of grooves and having circumferential surfaces, transverse surfaces and a contact surface intended to come into contact with ground during rolling, the contact element having a height H, and at least one connecting member connecting the transverse surface of the contact element to the transverse surface of the circumferentially adjacent contact element, a distance h between one of the connecting members and the contact face is at most equal to 30% of the height H, and a material of the connecting member is different from a material of the contact element, and a Young modulus of the material of the connecting member is higher than a Young modulus of the material of the contact element. 1. A tread for a tire having a plurality of grooves formed in the tread , comprising:a plurality of contact elements delimited by a plurality of grooves and having circumferential surfaces, transverse surfaces anda contact surface that comes into contact with ground during rolling, each of the contact elements having a height H, and at least one connecting member connecting the transverse surface of each of the contact elements to the transverse surface of a circumferentially adjacent contact element,wherein a distance h between one of the connecting members and the contact face is at most equal to 30% of the height H, and a material of the connecting member is different from a material of each of the contact element, and a Young modulus of the material of the connecting member is higher than a Young modulus of the material of the contact element.2. The tread according to claim 1 , wherein the Young modulus of the material of the connecting member is within the range of 0.05 GPa to 250 GPa.3. The tread according to claim 1 , wherein a ratio of a volume occupied by the connecting member relative to a volume of the groove between the ...

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Номер записи: 61
03-01-2019 дата публикации

METHODS AND APPARATUSES FOR ASSEMBLING TIRE COMPONENTS

Номер: US20190001751A1
Автор: Cress Ronald, Mahesha Chaitra, TROWBRIDGE JEREMY
Принадлежит:

The invention provides for a heavy truck tire () having a sub-casing, a belt package () and a rubber tread (), the tread extending axially form a first tread edge (N) to a second tread edge (N′) over a rolling tread width (RTW), the tread comprising a shoulder zone () adjacent to each of said first and second edges and a center zone () separating the two shoulder zones, each shoulder zone comprising a radially lower shoulder layer () and a radially upper shoulder layer (), the upper shoulder layer being intended to come into contact with the ground and the lower shoulder layer being interposed between the belt package and the upper shoulder layer, the upper shoulder layer consisting of an upper shoulder rubber compound, the lower shoulder layer consisting of a lower shoulder rubber compound being different from the upper shoulder rubber compound, wherein: —the upper shoulder layer extends a distance LI from a tread edge (N, N′) axially inward, the distance LI being greater than 15% and less than 40% of the rolling tread width (RTW); —the upper shoulder layer has a thickness (T) of between 70% and 130% of the tread depth over at least 80% of the distance LI; —the lower shoulder layer extends a distance L from a tread edge (N, N′) axially inward, the distance being greater than 15% of the rolling tread width (RTW); —the lower shoulder layer has a thickness of at least 4 mm over the portion of the shoulder zone which covers the belt package; —the upper shoulder rubber compound has a G*50 of at least 1.3 Mpa and a max tan () of at least 0.12; —the lower shoulder rubber compound has a max tan () not greater than the max tan () of a center rubber compound in the center zone being intended to come into contact with the ground; and—the center rubber compound has a max tan () of at most 0.09. 113.-. (canceled)12. A heavy truck tire comprising:a sub-casing, a belt package and a rubber tread, the tread extending axially from a first tread edge to a second tread edge over a ...

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Номер записи: 62
03-01-2019 дата публикации

HEAVY TRUCK TIRE TREAD AND HEAVY TRUCK TIRE

Номер: US20190001752A1
Автор: ABAROTIN VICTOR, Hicks Daniel
Принадлежит:

The invention provides for a heavy truck tire tread having a longitudinal direction, a lateral direction and a thickness direction, said tread comprising : a pair of opposing tread edges () spaced apart along the lateral direction; a tread region extending between the tread edges over a rolling tread width (RTW); a shoulder zone (SZ) adjacent to each tread edge of said pair of opposing tread edges and extending over a lateral length of 10% of the rolling tread width (RTW); and a center zone (CZ) defined between said shoulder zones; wherein the tread region comprises a plurality of ribs () separated by grooves (), said grooves running continuously from the center zone toward each of said tread edges at a groove angle relative to the lateral direction and extending out to the respective tread edge; and wherein a shoulder zone average groove angle is greater than 45° in absolute value; the shoulder zone average groove angle is greater than a center zone average groove angle in absolute values; and the grooves are running toward the tread edges 2. A heavy truck tire tread according to claim 1 , wherein the ribs are blunted where the grooves are opening out to the tread edge claim 1 , a lateral length of said blunting being less than 25 mm.3. A heavy truck tire tread according to claim 2 , wherein said lateral length of said blunting is at least 2 mm.4. A heavy truck tire tread according to claim 2 , wherein said lateral length of said blunting is at least 5 mm.5. A heavy truck tire tread according to claim 2 , wherein said lateral length of said blunting is at least 10 mm.6. A heavy truck tire tread according to claim 2 , wherein said lateral length of said blunting is between 15 and 20 mm.7. A heavy truck tire tread according to claim 1 , wherein said shoulder zone average groove angle (αs) is less than 70° in absolute value.8. A heavy truck tire tread according to claim 1 , wherein said shoulder zone average groove angle (αs) is greater than 50° in absolute value.9. A ...

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Номер записи: 63
03-01-2019 дата публикации

TIRE

Номер: US20190001753A1
Автор: Hayashi Shintaro
Принадлежит: BRIDGESTONE CORPORATION

A tire has three or more circumferential direction main grooves, a first land portion and a second land portion that are partitioned by the circumferential direction main grooves, first sipes that are provided in the first land portion, and that have a bend portion protruding in the tire circumferential direction, and whose two ends communicate respectively with the circumferential direction main grooves, second sipes that are provided in the second land portion on a virtual extension of the first sipes, and whose two ends communicate respectively with the circumferential direction main grooves, and first terminal grooves that are provided in the first land portion between first sipes, that are positioned on an outer side in a tire width direction of the first land portion and communicate with the circumferential direction main grooves, and that terminate at a position further to the outer side in the tire width direction than a position in the tire width direction of a distal end of the bend portion, wherein angle portions on an acute angle side relative to the tire circumferential direction of the first land portion facing the first sipes are chamfered. 1. A tire comprising:three or more circumferential direction main grooves that are provided in a tread and extend in a tire circumferential direction;a first land portion that is provided in the tread and is partitioned by the circumferential direction main grooves;a second land portion that is provided in the tread and is partitioned by the circumferential direction main grooves;first sipes, a plurality of which are provided in the first land portion, that have a bend portion protruding in the tire circumferential direction, and whose two ends communicate respectively with the circumferential direction main grooves that partition the first land portion;second sipes that are provided in the second land portion on a virtual extension of the first sipes, and whose two ends communicate respectively with the ...

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Номер записи: 64
03-01-2019 дата публикации

DEVICE FOR ATTENUATING ROLLING NOISE FOR A TIRE

Номер: US20190001754A1
Автор: Roty Gaël
Принадлежит:

The disclosure is related to a tread for a tire, this tread having a tread surface intended to come into contact with a roadway and comprising at least one groove of width W and depth P delimited by two facing lateral walls, these lateral walls being connected together by a groove bottom. At least one groove has a plurality of closing devices for reducing the running resonance noise generated by this groove, each closing device comprising at least two sets of flexible blades, a first set is connected to the bottom of the groove and is intended to flex around a first axis, and at least one second set connected to a lateral wall delimiting the groove, this second set being intended to flex around a second axis, this second axis being different than the first axis. 1. A tread for a tire , the tread having a tread surface , comprising:at least one groove of depth P delimited by two facing lateral walls, the two facing lateral walls being connected together by a bottom; 'each device comprising at least two sets of flexible blades, a first set being connected to a bottom of the groove and able to flex around a first axis, and at least one second set connected to a lateral wall delimiting the groove, the at least one second set able to flex around a second axis, the second axis being different than the first axis,', 'at least one groove having a plurality of closing devices for reducing the running resonance noise generated by the at least one groove,'}wherein each second set connected to a wall includes at least two flexible blades, each flexible blade of this second set extending over at least half the width of the groove;each flexible blade of the second set having two lateral faces that obstruct the flow of air in the groove, the two lateral faces of the second set being connected together by edge walls forming a thickness of the blade, an upper edge wall able to come into contact with a road during rolling and a lower edge wall facing the bottom of the groove in which ...

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Номер записи: 65
03-01-2019 дата публикации

Tire

Номер: US20190001755A1
Автор: Keita OKUNO
Принадлежит: Sumitomo Rubber Industries Ltd

A tire includes a tread portion being provided with a circumferentially extending main groove to define a first land portion between the main groove and a tread edge. The main groove includes a groove bottom, an outer groove wall extending radially outwardly and inclined toward the tread edge, and an inner groove wall extending radially outwardly and inclined toward the tire equator. The groove bottom extends in a zigzag manner in a tire circumferential direction in such a manner as to alternate between a first location where the groove bottom is located nearest to the tire equator and a second location where the groove bottom is located nearest to the tread edge. An angle θ2b of the outer groove wall in a groove cross-section at the second location is greater than an angle θ1a of the inner groove wall in a groove cross-section at the first location.

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Номер записи: 66
13-01-2022 дата публикации

PNEUMATIC TIRE

Номер: US20220009293A1
Автор: Asano Tomohiro, Wada Hironori
Принадлежит:

A pneumatic tire includes a circumferential main groove extending in a tire circumferential direction in a tread surface of a tread portion, wherein when the circumferential main groove is segmented into an outer side in a tire radial direction and an inner side in the tire radial direction by drawing an imaginary segment line parallel with a straight line connecting each of groove opening edges at a position of ½ of a groove depth in a meridian cross-section, a cross-sectional area SU on the outer side in the tire radial direction and a cross-sectional area SD on the inner side in the tire radial direction satisfy the relationship 0.15≤SD/SU≤0.60. 1. A pneumatic tire , comprising:a circumferential main groove extending in a tire circumferential direction in a tread surface of a tread portion;the circumferential main groove being segmented into an outer side in tire radial direction and an inner side in tire radial direction by drawing an imaginary segment line parallel with a straight line connecting each of groove opening edges at a position of ½ of a groove depth in a meridian cross-section, anda cross-sectional area SU on the outer side in tire radial direction and a cross-sectional area SD on the inner side in tire radial direction satisfying the relationship 0.15≤SD/SU≤0.60.211. The pneumatic tire according to claim 1 , wherein the imaginary segment line is drawn at a ¼ position of the groove depth in a meridian cross-section claim 1 , the circumferential main groove has a groove width W at the ¼ position and a groove width W of the groove opening portion claim 1 , and satisfies the relationship W/W≤0.78.3. The pneumatic tire according to claim 1 , wherein the circumferential main groove comprises in at least one groove wall claim 1 , an inflection portion where a groove wall angle changes from the groove opening edge toward a groove bottom.4. The pneumatic tire according to claim 3 , wherein the circumferential main groove has a height HT in the tire radial ...

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Номер записи: 67
08-01-2015 дата публикации

Pneumatic tire

Номер: US20150007916A1
Автор: Daisuke UTSUMI, Norio Hayashi, Ryo Oba
Принадлежит: Sumitomo Rubber Industries Ltd

[Object] A pneumatic tire 2 which is excellent in durability is provided. [Solution] The tire 2 includes adhesive sheet layers 28. Each adhesive sheet layer 28 includes an interposed portion 58 and a protruding portion 60. The interposed portion 58 is interposed between a base layer 32 and a cap layer 34 of a tread 4. The protruding portion 60 is layered over a carcass 12. The adhesive sheet layers 28 are obtained by a rubber composition being crosslinked. The rubber composition contains a tackifier. A width W1 of the interposed portion 58 is preferably greater than or equal to 5 mm, and preferably not greater than 20 mm. A width W2 of the protruding portion 60 is preferably greater than or equal to 10 mm, and preferably not greater than 20 mm. A thickness of each adhesive sheet layer 28 is preferably greater than or equal to 0.5 mm, and preferably not greater than 2.0 mm. A ratio of an adhesive strength of each adhesive sheet layer 28 to an adhesive strength of the cap layer 34 is preferably greater than or equal to 1.30.

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Номер записи: 68
08-01-2015 дата публикации

Pneumatic tire

Номер: US20150007917A1
Автор: SATOSHI Tanaka
Принадлежит: Sumitomo Rubber Industries Ltd

A pneumatic tire is provided with a center land portion between two zigzag crown main grooves, and two middle land portions between two zigzag shoulder main grooves and the two crown main grooves. Each center block is provided with center sipes between which a central part defining the maximum width of the center block is formed. The middle land portion is divided into middle blocks by alternate, oppositely inclined first middle axial grooves and second middle axial grooves. Each middle block is provided with nonparallel middle sipes.

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Номер записи: 69
20-01-2022 дата публикации

PNEUMATIC TIRE

Номер: US20220016937A1
Автор: UEMURA Takanori
Принадлежит:

Provided is a pneumatic tire. A chamfered portion and a non-chamfered portion are provided in each of an edge on a leading side and an edge on a trailing side of a sipe. In a meridian cross-sectional view, a profile line of a rib projects further to an outer side in a tire radial direction than a reference tread profile line. A radius of curvature TR of the reference tread profile line and a radius of curvature RR of the profile line satisfy a relationship of TR>RR. The chamfered portions on both the leading side and the trailing side are disposed so as to straddle a maximum projection position. A maximum projection amount D of the rib with respect to the reference tread profile line and a maximum width W of the chamfered portion satisfy a relationship of 0.05 mmRR,the chamfered portions on both the leading side and the trailing side of the sipe being disposed straddling ...

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Номер записи: 70
12-01-2017 дата публикации

Tire Tread For A Farm Vehicle

Номер: US20170008344A1
Автор: LALANCE Gautier, MANGERET Jean-Luc, REY Daniel, Vervaet Patrick
Принадлежит:

Tire for a vehicle for agricultural use comprises tread (), comprising lugs () separated by grooves (), each lug () extending radially outwards, over a radial height H, from a bottom surface () as far as a contact face (). A first lug portion (), made of a first elastomeric compound, extends radially inwards, from the contact face () as far as a first interface (), over a radial distance Dbetween 0.5 H (the radial height) and H. A second lug portion (), made of a second elastomeric compound, extends radially inwards, from the first interface () as far as the bottom surface (), over a radial distance D. The second elastomeric compound extends radially into the lugs () and grooves (), from the bottom surface (), as far as a second interface (), over a radial distance Dbetween 3 mm and 15 mm. 1. A tire for a vehicle for agricultural use , comprising:a tread, adapted to come into contact with the ground, comprising lugs separated from one another by grooves;each lug extending radially outwards, over a radial height H, from a bottom surface as far as a contact face;the grooves being defined at least partially by portions of the bottom surface separating the lugs;{'sub': 1', '2', '3', '3, 'wherein, in each said lug, a first lug portion, made of a first elastomeric compound, extends radially inwards, from the contact face as far as a first interface, over a radial distance Dat least equal 0.5 times and at most equal to 1 times the radial height H of the lug, wherein, in each said lug, a second lug portion, made of a second elastomeric compound, extends radially inwards, from the first interface as far as the bottom surface, over a radial distance D, wherein the second elastomeric compound extends radially into the lugs and the grooves, from the bottom surface as far as a second interface, over a radial distance D, and wherein the radial distance Dbetween the bottom surface and the second interface is at least equal to 3 mm and at most equal to 15 mm.'}2. The tire according ...

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Номер записи: 71
12-01-2017 дата публикации

Tire comprising a tread made up of several elastomeric compounds

Номер: US20170008345A1
Автор: Christophe Gayton, Hichem Rehab, Philippe Gervais
Принадлежит: Compagnie Generale des Etablissements Michelin SCA, Michelin Recherche et Technique SA Switzerland

A tire the tread of which contains at least three circumferential grooves, having at least three radially superposed layers of elastomeric compounds. A first elastomeric compound constituting the first layer forming the radially outer part of the tread has a maximum value of tan(δ)max, greater than 0.110, a second elastomeric compound constituting the second layer radially on the inside has a tan(δ)max at least 10% lower than the first elastomeric compound, the radially innermost third layer of the tread consists of at least two first parts and of at least three second parts axially, each one in contact with at least one of the at least two first parts, the at least two first parts axially centered on a radial plane passing through one of the at least three circumferential grooves consisting of the second compound and the at least three second parts consisting of a third elastomeric compound having a maximum value of tan(δ), denoted tan(δ)max, at least 10% lower than the second elastomeric compound.

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Номер записи: 72
12-01-2017 дата публикации

PNEUMATIC TIRE

Номер: US20170008346A1
Автор: KUBO Hokuto
Принадлежит: SUMITOMO RUBBER INDUSTRIES, LTD.

A pneumatic tire is provided in the tread portion with a pair of center main grooves arranged on both sides of the tire equator C, and a pair of shoulder main grooves arranged on both sides thereof, and is provided on both sides of the equator C with middle land portions defined between the center main grooves and the shoulder main grooves The middle land portions are provided with a plurality of middle oblique grooves Each middle oblique groove extends toward the tire equator C from the outer end in the tire axial direction communicating with the shoulder main groove and the inner end terminates without reaching to the center main groove In an outer end side of the middle oblique groove an outer shallow bottom portion having a depth less than the maximum depth of the middle tilted groove is provided. 1. A pneumatic tire in which , by being provided with a pair of center main grooves disposed on both sides of the tire equator and a pair of shoulder main grooves disposed on both sides of the center main grooves ,the tread portion is provided on both sides of the tire equator with middle land portions which are defined between the center main grooves and the shoulder main grooves, each of the middle land portions is provided with a plurality of middle oblique grooves,', 'each of the middle oblique grooves extends toward the tire equator from an axially outer end communicating with the shoulder main groove, and terminates so that an axially inner end does not communicate with the center main groove, and', 'an outer end side of the middle oblique groove is provided with an outer shallow bottom portion having a groove depth smaller than the maximum groove depth of the middle oblique groove., 'and which is characterized in that'}2. The pneumatic tire as set forth in claim 1 , whereinthe inner end side of the middle oblique groove is provided with an inner shallow bottom portion having a depth smaller than the maximum groove depth of the middle oblique groove.3. The ...

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Номер записи: 73
12-01-2017 дата публикации

TIRE

Номер: US20170008347A1
Автор: AKASHI Tokumasa
Принадлежит: BRIDGESTONE CORPORATION

A tire () includes, in a tread surface (): at least two circumferential grooves () extending in a tire circumferential direction; and a land portion () sandwiched between the circumferential grooves (). The land portion () has a resonator () including: an air chamber (); a first branch groove (); and a second branch groove (). The two circumferential grooves consist of: a first circumferential groove () having a smaller cross-sectional area in a cross section along a plane perpendicular to extending direction of the circumferential grooves; and a second circumferential groove () having a larger cross-sectional area in a cross section along a plane perpendicular to extending direction of the circumferential grooves. A centroid (C) of the air chamber () is situated to a side closer to the first circumferential groove () with respect to a tire widthwise center (CL) of the land portion (). 1. A tire comprising , in a tread surface:at least two circumferential grooves extending in a tire circumferential direction; anda land portion sandwiched between the two circumferential grooves,wherein the land portion has a resonator, the resonator including: an air chamber; and a first branch groove and a second branch groove connecting the air chamber with the respective two circumferential grooves,the two circumferential grooves consist of: a first circumferential groove having a smaller cross-sectional area in a cross section along a plane perpendicular to an extending direction of the circumferential grooves; and a second circumferential groove having a larger cross-sectional area in a cross section along a plane perpendicular to the extending direction of the circumferential grooves, anda centroid of the air chamber is situated to a side closer to the first circumferential groove with respect to a tire widthwise center of the land portion.2. The tire according to claim 1 ,wherein the first branch groove connects the air chamber with the first circumferential groove, anda ...

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Номер записи: 74
12-01-2017 дата публикации

HEAVY DUTY PNEUMATIC TIRE

Номер: US20170008349A1
Автор: TANAKA Kaori
Принадлежит: SUMITOMO RUBBER INDUSTRIES, LTD.

A heavy duty pneumatic tire includes a tread portion provided with a plurality of circumferentially extending main grooves and a plurality of land portions separated by the main grooves. The land portions include a shoulder land portion with a tread edge, a first middle land portion adjacent to the shoulder land portion, and a second middle land portion adjacent to the first middle land portion. The shoulder land portion is formed into a circumferentially continuous rib. The first middle land portion is formed into a row of first middle blocks separated by a plurality of first middle lateral grooves. The second middle land portion is formed into a row of second middle blocks separated by a plurality of second middle lateral grooves. Each first middle block has a circumferential length greater than that of each second middle block. 1. A heavy duty pneumatic tire comprising:a tread portion provided with a plurality of circumferentially extending main grooves and a plurality of land portions separated by the main grooves;the land portions comprising a shoulder land portion having a tread edge, a first middle land portion adjacent to the shoulder land portion, and a second middle land portion adjacent to the first middle land portion;the shoulder land portion formed into a circumferentially continuous rib;the first middle land portion formed into a row of first middle blocks separated by a plurality of first middle lateral grooves;the second middle land portion formed into a row of second middle blocks separated by a plurality of second middle lateral grooves; andeach first middle block having a circumferential length greater than that of each second middle block.2. The heavy duty pneumatic tire according to claim 1 ,wherein a tread width is equal to or more than 300 mm, and an aspect ratio is equal to or less than 55%.3. The heavy duty pneumatic tire according to claim 1 ,wherein the land portions comprise a third middle land portion adjacent to the second middle land ...

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Номер записи: 75
12-01-2017 дата публикации

Pneumatic Tire

Номер: US20170008353A1
Автор: Kishizoe Isamu, TANNO Atsushi
Принадлежит: THE YOKOHAMA RUBBER CO., LTD.

The present technology provides a pneumatic tire having a strip-shaped sound-absorbing member bonded on the inner surface of the tire includes a plurality of belt layers, two or more belt cover layers, one or more belt edge cover layers, and a thread rubber layer. The thickness of the tread rubber layer is substantially uniform in the region X where the sound-absorbing member is located so that the difference between the thickness t at an end of the sound-absorbing member and the thickness t at the position of the tire equator is equal to or less than 0.5 mm. The thickness of the tread rubber layer is smaller in the region Y where the belt edge cover layer is located than in the region X so that the difference between the minimum value t of the thickness in the region Y and the thickness t ranges from 1.0 to 4.0 mm. 1. A pneumatic tire , comprising:an annular tread portion extending in a tire circumferential direction;a pair of sidewall portions disposed on two sides of the tread portion;a pair of bead portions disposed on an inner side in a tire radial direction of the sidewall portions;a strip-shaped sound-absorbing member bonded to a region of a tire inner surface corresponding to the tread portion along the tire circumferential direction via an adhesive layer;a carcass layer provided between the pair of bead portions;a plurality of belt layers disposed on an outer circumferential side of the carcass layer in the tread portion;a belt cover layer made from two or more layers of aliphatic polyamide fiber cords oriented in the tire circumferential direction disposed on an outer circumferential side of the belt layer and extending over the whole width of the belt layer;a belt edge cover layer made from one or more layers of aliphatic polyamide fiber cords oriented in the tire circumferential direction disposed on an outer circumferential side of the belt cover layer so as to cover two edges of the belt layers; anda tread rubber layer disposed on an outer ...

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Номер записи: 76
14-01-2016 дата публикации

Pneumatic Tire

Номер: US20160009137A1
Автор: Kubota Masataka, Minami Yuji
Принадлежит:

The present invention relates to a pneumatic tire () in which the ratio of the total width SW and the outer diameter OD satisfies “SW/OD≦0.3”, and grooves are provided on the tread portion (). In the ground contact region (G) of the tread portion, when the groove area ratio with respect to the ground contact area is GR, the ground contact width is W, the region having a width of 50% of the ground contact width W and the tire equatorial line (CL) as center is the center region (AC), the groove area ratio in the center region is GCR, the ground contact region on the outer side in the tire width direction of the center region is the shoulder region (AS), and the groove area ratio in the shoulder region is GSR, the ground contact region of the tread portion is formed to satisfy “10%≦GR≦25%” and “GCR≦GSR”. 1. A pneumatic tire comprising grooves on a tread portion , {'br': None, 'i': 'SW', '/OD≦0.3, and'}, 'the ratio of a total width SW and an outer diameter OD of the pneumatic tire SW/OD satisfyingin a ground contact region of the tread portion, a groove area ratio with respect to a ground contact area is GR, a ground contact width is W, a region having a width of 50% of the ground contact width W and a tire equatorial line as center is a center region AC, a groove area ratio in the center region AC is GCR, a ground contact region on an outer side in a tire width direction from the center region AC is a shoulder region AS, and a groove area ratio in the shoulder region AS is GSR, [{'br': None, '10%≦GR≦25%, and'}, {'br': None, 'GCR≦GSR.'}], 'the ground contact region of the tread portion is formed to satisfy2. The pneumatic tire according to claim 1 , wherein the relationship of GCR and GSR satisfies:{'br': None, '1.0≦GSR/GCR≦2.0.'}3111122212. The pneumatic tire according to claim 1 , wherein when a region having a width corresponding to 25% of the ground contact width W with the tire equatorial line as center is a region AC claim 1 , a groove area ratio in the region AC ...

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Номер записи: 77
14-01-2016 дата публикации

Pneumatic Tire

Номер: US20160009141A1
Автор: Yuuichi Suga
Принадлежит: Yokohama Rubber Co Ltd

A tread pattern of a pneumatic tire is provided with two outer circumferential main grooves, and at least one inner circumferential main groove provided between the outer circumferential main grooves. A tread profile line of a first land portion between the outer circumferential main grooves protrudes 1 mm or less with respect to a first arc shape formed so as to pass through edge ends on the respective inner sides of the outer circumferential main grooves and edge ends on both sides of the inner side circumferential main groove. Furthermore, a tread profile line of a second land portion on the outer side of the outer circumferential main grooves in a tire width direction protrudes 1 mm or less with respect to a second arc shape which passes through edge ends on the outer side of the outer circumferential main grooves.

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Номер записи: 78
14-01-2016 дата публикации

Tire

Номер: US20160009143A1
Автор: Fumitaka Kobayashi
Принадлежит: Bridgestone Corp

To improve motion performance of a tire on a dry road surface and also improve drainage performance of a land so as to improve motion performance of the tire on a wet road surface. A tire ( 1 ) includes a land ( 20 ) formed on a tread portion ( 2 ). A ground contact surface ( 30 ) of the land ( 20 ) is formed in a convex shape in which a plurality of curved portions ( 31 to 33 ) each having a predetermined curvature Rc, Re, and Rm is smoothly connected at least on a section of the land ( 20 ) in a tire width direction H. Rc<Re holds when a curvature of the center curved portion ( 31 ) including a center part ( 35 ) of the ground contact surface ( 30 ) is Rc and a curvature of the end curved portion ( 32 ) including an end portion ( 34 ) of the ground contact surface ( 30 ) is Re. The curvature Rm of the curved portion ( 33 ) located between the center curved portion ( 31 ) and the end curved portion ( 32 ) is within a range of Rc to Re.

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Номер записи: 79
14-01-2016 дата публикации

Pneumatic tire

Номер: US20160009144A1
Автор: Yuki Kawakami
Принадлежит: Bridgestone Corp

A pneumatic tire, having in a ground contact surface of a tread thereof at least one circumferential groove extending in the tire circumferential direction and a plurality of lateral grooves each opening to the corresponding circumferential groove and being wider than the circumferential groove, wherein: a recessed portion is formed in a circumferential groove wall, facing the corresponding lateral groove, of the circumferential groove; an aperture plane portion of the lateral groove at which the lateral groove opens to the circumferential groove at least partially faces an aperture plane portion of the recessed portion at which the recessed portion opens to the circumferential groove; and each lateral groove extends to be inclined with respect to the tire width direction at an inclination angle of at least 30°.

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Номер записи: 80
14-01-2016 дата публикации

Improved civil engineering tire tread

Номер: US20160009145A1
Автор: Murielle De-Tullio
Принадлежит: Compagnie Generale des Etablissements Michelin SCA, Michelin Recherche et Technique SA Switzerland

Tread for a civil engineering tire, provided with circumferential grooves and transverse grooves, having two edge rows provided with a plurality of blocks, which in pairs delimiting a groove of transverse overall orientation opening both onto a circumferential groove and to the outside of the tread, each block having a contact face to contact the ground, two lateral faces—an external lateral face and an internal lateral face, a front face and a rear face, intersecting the contact face along a front edge corner and a rear edge corner, the blocks formed such that their external lateral faces lie the same distance from an equatorial plane that divides the tread into two equal halves wherein the width of the transverse grooves increases progressively at least from a non-zero distance measured from a plane parallel to the equatorial plane through the axially outermost points of the external lateral faces of the blocks wherein the maximum increase in width of a transverse groove is at least equal to 20% and at most equal to 50% of the maximum circumferential length Lc of each block.

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Номер записи: 81
27-01-2022 дата публикации

Pneumatic tire with reinforcing part

Номер: US20220024256A1
Автор: Il Sik Kim, Joo Bae Park, Seung Hwan RHEE
Принадлежит: Hankook Tire and Technology Co Ltd

There is provided a pneumatic tire with a reinforcing part which is mounted on a tire wheel, the pneumatic tire including: a tread having a groove that is formed in a circumferential direction of the tire wheel as being recessed toward a central axis of the tire wheel, a kerf that is formed to intersect the groove as being recessed toward the central axis of the tire wheel, and one or more blocks that are formed between the groove and the kerf and come into contact with a road surface; a shoulder formed at a side of the tread; and a reinforcing part inserted into the groove formed between the one or more blocks. The reinforcing part reduces noise produced due to contact with the road surface by being bent one or more times.

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Номер записи: 82
27-01-2022 дата публикации

TIRE

Номер: US20220024257A1
Автор: Nakajima Koichi
Принадлежит: SUMITOMO RUBBER INDUSTRIES, LTD.

A tire having a tread portion that is provided with sipes. Four sipe segments of the sipe include a first sipe segment, a second sipe segment, a third sipe segment, and a fourth sipe segment. At least one of the first sipe segment and the third sipe segment includes, in the cross section orthogonal to the length direction, an oscillated portion which extends in the tire radial direction, while oscillating in the lateral direction orthogonal to the length direction. 1. A tire comprising a tread portion , whereinthe tread portion is provided with a sipe,the sipe comprises a portion in which a plurality of repeat units are connected in series in the length direction of the sipe,each of the repeat units is bent so that four sipe segments form acute angles with each other, a first sipe segment extending in a tire axial direction,', 'a second sipe segment extending from an end in a first tire axial direction of the first sipe segment toward a first tire circumferential direction,', 'a third sipe segment extending in the first tire axial direction from the second sipe segment, and', 'a fourth sipe segment connected to the third sipe segment and extending from the third sipe segment toward a second tire circumferential direction opposite to the first tire circumferential direction, and', 'at least one of the first sipe segment and the third sipe segment comprises, in the cross section orthogonal to the length direction, an oscillated portion which extends in a tire radial direction, while oscillating in a lateral direction orthogonal to said length direction., 'said four sipe segments include'}2. The tire as set forth in claim 1 , wherein each of the first sipe segment and the third sipe segment comprises the oscillated portion.3. The tire as set forth in claim 2 , wherein the oscillated portion of the first sipe segment and the oscillated portion of the third sipe segment extend in the radial direction of the tire claim 2 , while oscillating in opposite phases.4. The tire ...

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Номер записи: 83
27-01-2022 дата публикации

TIRE WITH EMERGING SNOW FEATURE

Номер: US20220024258A1
Автор: Severyn David M.
Принадлежит:

A tire includes a circumferential tread extending in a circumferential direction circumscribing an axis of rotation. The circumferential tread includes a transverse groove having a plurality of protrusions protruding from a bottom portion of the transverse groove. One or more of a depth, a width, and a length of the transverse groove decreases in a direction parallel to the axis of rotation. The plurality of protrusions are circumferentially spaced apart across the bottom portion of the transverse groove. 115-. (canceled)16. A tire comprising:a circumferential tread circumscribing an axis of rotation, the circumferential tread including at least a first circumferential groove and a second circumferential groove;a transverse groove disposed between the first circumferential groove and the second circumferential groove, wherein a depth of the transverse groove is defined between an outer surface of the circumferential tread and a bottom portion of the transverse groove in a radial direction perpendicular to the axis of rotation, wherein a first depth of the transverse groove at a first end of the transverse groove is greater than a second depth of the transverse groove at a second end of the transverse groove, anda plurality of protrusions protruding from the bottom portion of the transverse groove.17. The tire of claim 16 , wherein the transverse groove extends from the first circumferential groove to the second circumferential groove claim 16 , and wherein the depth of the transverse groove decreases from the first circumferential groove to the second circumferential groove.18. The tire of claim 16 , wherein the transverse groove includes a first side portion extending from the bottom portion to a first edge of the transverse groove and a second side portion extending from the bottom portion to a second edge of the transverse groove claim 16 , and wherein the plurality of protrusions extend across the transverse groove from the first side portion to the second side ...

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Номер записи: 84
27-01-2022 дата публикации

TIRE

Номер: US20220024261A1
Автор: KAWASHIMA Keisuke
Принадлежит: BRIDGESTONE CORPORATION

A tire including a land part partitioned between two main grooves extending in the tire circumferential direction S of the tire and resonators formed in the land part. A resonator has a cavity part separated from the two main grooves and is opened at the surface of the land part, a 1st sipe that is opened at one main groove and the cavity part, and a 2nd sipe that is opened at the other main groove and the cavity part. Depths of the main grooves are 3 mm or more and 6.5 mm or less. A volume value of the cavity part is more than 3 times or more and 5 times or less a sum of the cross-sectional areas of the two main grooves with the land part in between, and lengths of the 1st sipe and the 2nd sipe are 10 mm or more and 25 mm or less. 1. A tire comprising a land part partitioned between two main grooves extending in a circumferential direction of a tire and resonators formed in the land part ,wherein a resonator has a cavity part separated from the two main grooves and is opened at the surface of the land part, a 1st sipe that is opened at one main groove and the cavity part and a 2nd sipe that is opened at the other main groove and the cavity part,depths of the main grooves are 3 mm or more and 6.5 mm or less,a volume value of the cavity part is 3 times or more and 5 times or less a sum of the cross-sectional areas of the two main grooves with the land in between, andlengths of the 1st and the 2nd sipes are 10 mm or more and 25 mm or less.2. The tire according to claim 1 , wherein widths of the main grooves are 8 mm or more and 20 mm or less.3. The tire according to claim 1 , wherein cross-sectional areas of the 1st and 2nd sipes are 2 mmor more and 5 mmor less.4. The tire according to claim 1 , wherein widths of the 1st and 2nd sipes at the surface of the land part are 0.2 mm or more and 0.7 mm or less.5. The tire according to claim 1 , wherein a distance between the two main grooves in the tire width direction is 20 mm or more and 50 mm or less.6. The tire according ...

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Номер записи: 85
11-01-2018 дата публикации

MOTORCYCLE TYRE AND PAIR OF MOTORCYCLE TYRES

Номер: US20180009265A1
Автор: GALLO Sandro, MARIANI Mario, MISANI Pierangelo, SCHIAVOLIN Andrea
Принадлежит: PIRELLI TYRE S.P.A.

A motorcycle tyre has a tread band including a central portion and two shoulder portions arranged at axially opposite sides of the central portion. The central portion includes a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of the equatorial plane of the tyre. Each groove of the first plurality of grooves has a substantially curvilinear course such as to form a concavity. The central portion further includes a sub-portion substantially free of grooves placed astride the equatorial plane of the tyre. Each of the shoulder portions includes a second plurality of grooves arranged obliquely relative to the equatorial plane of the tyre. 130-. (canceled)31. A motorcycle tyre comprising a tread band comprising a central portion and two shoulder portions arranged at axially opposite sides of the central portion , wherein:the central portion comprises a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of an equatorial plane of said tyre, wherein each groove of said first plurality of grooves has a substantially curvilinear course thereby forming a concavity;the central portion comprises a sub-portion substantially free of grooves placed astride an equatorial plane of said tyre;each of said shoulder portions comprises a second plurality of grooves arranged obliquely relative to the equatorial plane of said tyre; andsaid second plurality of grooves comprises a set of groove pairs, wherein at least one extension of each groove pair of said second plurality of grooves intersects a groove of said first plurality of grooves.32. The tyre according to claim 31 , wherein at least one extension of each groove pair of said second plurality of grooves intersects the groove of said first plurality of grooves at a portion spaced apart from the ends of the groove of said first plurality of grooves.33. The tyre according ...

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Номер записи: 86
11-01-2018 дата публикации

MOTORCYCLE TYRE AND PAIR OF MOTORCYCLE TYRES

Номер: US20180009266A1
Автор: GALLO Sandro, MARIANI Mario, MISANI Pierangelo, SCHIAVOLIN Andrea
Принадлежит: PIRELLI TYRE S.P.A.

A motorcycle tyre has a tread band including a central portion and two shoulder portions arranged at axially opposite sides of the central portion. The central portion includes a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of the equatorial plane of the tyre. Each groove of the first plurality of grooves has a substantially curvilinear course such as to form a concavity. The central portion further includes a sub-portion substantially free of grooves placed astride the equatorial plane of the tyre. Each of the shoulder portions includes a second plurality of grooves arranged obliquely relative to the equatorial plane of the tyre. 130-. (canceled)31. A motorcycle tyre comprising a tread band comprising a central portion and two shoulder portions arranged at axially opposite sides of the central portion , wherein:the central portion comprises a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of an equatorial plane of said tyre, wherein each groove of said first plurality of grooves has a substantially curvilinear course thereby forming a concavity;the central portion comprises a sub-portion substantially free of grooves placed astride an equatorial plane of said tyre;each of said shoulder portions comprises a second plurality of grooves arranged obliquely relative to the equatorial plane of said tyre;the concavity of the grooves of said first plurality of grooves is directed according to a direction opposite to the equatorial plane of said tyre; andthe second plurality of grooves comprises a set of groove pairs, wherein at least one extension of each groove pair of said second plurality of grooves intersects a groove of said first plurality of grooves.32. The tyre according to claim 31 , wherein at least one extension of each groove pair of said second plurality of grooves intersects a groove of ...

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Номер записи: 87
11-01-2018 дата публикации

Pneumatic Tire

Номер: US20180009270A1
Автор: Nishino Tomohisa
Принадлежит: THE YOKOHAMA RUBBER CO., LTD.

A pneumatic tire comprising circumferential main grooves, a land portion defined by the circumferential main grooves, and a plurality of lug grooves disposed in the land portion that open to the circumferential main grooves. The land portion comprises notch portions formed on opening portions of the lug grooves and chamfered portions formed on edge portions of the notch portions. The notch portions have an edge portion with a V-shape projecting in a tire circumferential direction. A maximum width W of the notch portions and a width W of the chamfered portions have the relationship 0.30≦W/W≦1.80. 1. A pneumatic tire , comprising:a plurality of circumferential main grooves;a land portion defined by a pair of the plurality of circumferential main grooves; anda plurality of lug grooves disposed in the land portion that open to at least one of the plurality of circumferential main grooves;the land portion comprising notch portions formed only on opening portions of the lug grooves, and chamfered portions formed on edge portions of the notch portions.22332. The pneumatic tire according to claim 1 , wherein a maximum width W of the notch portions and a width W of the chamfered portions have a relationship 0.30≦W/W≦1.80.333. The pneumatic tire according to claim 1 , wherein a width W of the chamfered portions is in a range 1.5 mm≦W≦6.0 mm.41221. The pneumatic tire according to claim 1 , wherein a maximum width W of the land portion and the maximum width W of the notch portions have a relationship 0.05≦W/W≦0.25.51221. The pneumatic tire according to claim 1 , wherein a maximum groove depth D of the lug grooves and a maximum depth D of the notch portions have a relationship 0.30≦D/D≦1.00.61221. The pneumatic tire according to claim 5 , wherein the lug grooves include wider lug grooves and narrower lug grooves claim 5 , and wherein the maximum groove depth D of the narrower lug grooves and the maximum depth D of the notch portions have the relationship D/D≦0.80.71221. The ...

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Номер записи: 88
14-01-2021 дата публикации

Pneumatic Tire

Номер: US20210008928A1
Автор: Keisuke Nakazaki
Принадлежит: Yokohama Rubber Co Ltd

In a pneumatic tire, a groove opening portion of an inner side shoulder main groove and a groove opening portion of an inner side center main groove have edge portions with a straight shape. A groove opening portion of an outer side center main groove has an edge portion chamfered in a zigzag shape. A groove width Wg1 of the inner side shoulder main groove, a groove width Wg2 of the inner side center main groove, and a groove width Wg3 of the outer side center main groove have a relationship Wg1<Wg3 and Wg2<Wg3.

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Номер записи: 89
14-01-2021 дата публикации

PNEUMATIC VEHICLE TIRE

Номер: US20210008929A1
Автор: Özüduru Ahmet, Roeger Bernhard, Schütte Ralf
Принадлежит: CONTINENTAL REIFEN DEUTSCHLAND GMBH

A pneumatic vehicle tire with a tread comprising circumferential grooves () and at least one profile rib (), which runs around in the circumferential direction and formed in which there are grooves () which at a groove flank () of a circumferential groove () that delimits the profile rib () open into it, wherein the groove flanks () of the circumferential groove () run at an angle (β) of 12° to 17° to the radial direction, thereby widening the circumferential groove () in the direction of the periphery of the tread. 113.-. (canceled)14. A pneumatic vehicle tire with a tread comprising circumferential grooves and at least one profile rib which runs around in a circumferential direction , and formed in the at least one profile rib are grooves which at a groove flank of a circumferential groove delimits the profile rib , wherein groove flanks of the circumferential groove run at an angle (β) of 12° to 17° relative a radial direction , thereby widening the circumferential groove in the direction of a periphery of the tread;wherein the grooves run at an angle (α) of 45°±20° relative the axial direction and end within the profile rib;{'sub': '2', 'wherein the grooves have a maximum depth (t) of 3.5 mm and open in each case into an indentation which is formed at the groove flank and reaches up to the periphery of the tread;'}wherein the indentation is concavely rounded along the groove flank, has a bottom that runs parallel to the periphery of the tread, and is at a distance (c), determined in the radial direction, of from 0.5 mm to 2.0 mm from the deepest point of a groove base of the circumferential groove.15. The pneumatic vehicle tire as claimed in claim 14 , wherein the indentation and the bottom of the indentation have a shape similar to a D in a plan view of the tread.16. The pneumatic vehicle tire as claimed in claim 14 , wherein the indentation and the bottom of the indentation have a shape similar to a circular segment in a plan view of the tread claim 14 , and ...

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Номер записи: 90
10-01-2019 дата публикации

PNEUMATIC TIRE

Номер: US20190009615A1
Автор: TATSUTA Masahiro, YOSHIMURA Kozo
Принадлежит: SUMITOMO RUBBER INDUSTRIES, LTD.

A pneumatic tire includes a tread portion including a contact patch which occurs when the tire is mounted on a standard wheel rim with a standard pressure and loaded with a certain tire load at zero camber angle. The contact patch, on a respective tire load, defines a ratio Lc/Ls of a crown contact circumferential length Lc at an axial center of the contact patch to a shoulder contact circumferential length Ls at an axial location of 80% of an axial maximum width of the contact patch. The ratio Lc/Ls upon being loaded with 40%, of a standard tire load is equal to or less than 125% of the ratio Lc/Ls upon being loaded with 70% of the standard tire load. 1. A pneumatic tire comprising:a tread portion comprising a contact patch which occurs when the tire is mounted on a standard wheel rim with a standard pressure and loaded with a certain tire load at zero camber angle; andthe contact patch, on a respective tire load, defining a ratio Lc/Ls of a crown contact circumferential length Lc at an axial center of the contact patch to a shoulder contact circumferential length Ls at an axial location of 80% of an axial maximum width of the contact patch, whereinthe ratio Lc/Ls upon being loaded with 40% of a standard tire load is equal to or less than 125% of the ratio Lc/Ls upon being loaded with 70% of the standard tire load.2. The pneumatic tire according to claim 1 ,wherein the ratio Lc/Ls is in a range of from 120% to 150% when the tire load is in a range of from 40% to 70% of the standard tire load.3. The pneumatic tire according to claim 1 ,the tread portion further comprising a circumferentially and continuously extending crown main groove arranged on a tire equator and a circumferentially and continuously extending shoulder main groove arranged between the crown main groove and a tread edge to define a middle land portion between the crown main groove and the shoulder main groove, and a shoulder land portion between the shoulder main groove and the tread edge, andon ...

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Номер записи: 91
10-01-2019 дата публикации

PNEUMATIC TIRE

Номер: US20190009616A1
Автор: KAWAZU Akari
Принадлежит: SUMITOMO RUBBER INDUSTRIES, LTD.

A pneumatic tire has a contact patch when the tire is mounted on a standard wheel rim and inflated to a standard pressure and contacted with a flat surface by loading a standard load and leaning toward a first direction in the tire axial direction at a camber angle of 3 degrees, wherein a position at which the maximum ground contact length in the tire circumferential direction of the contact patch occurs, is positioned at an axial distance of 20% to 30% of the maximum axial width of the contact patch from the axial center of the contact patch toward the first direction. 1. A pneumatic tire comprising a tread portion defining a contact patch of the tire , whereinin a 3-degree-camber-andgle ground contacting state of the tire in which the tire is mounted on a standard wheel rim and inflated to a standard pressure and contacted with a flat surface by loading a standard load and leaning toward a first direction in the tire axial direction at a camber angle of 3 degrees,a position of the contact patch at which the maximum ground contact length in the tire circumferential direction of the contact patch occurs,is positioned at an axial distance in a range from 20% to 30% of a maximum axial width of the contact patch from the center position in the tire axial direction of the contact patchtoward the first direction.2. The pneumatic tire according to claim 1 , whereinthe tread portion is provided with a belt comprising a radially outermost belt ply and a radially inner belt ply, andthe axial width of the radially outermost belt ply is not less than 0.60 times the maximum axial width of the contact patch.3. The pneumatic tire according to claim 2 , whereinthe axial width of the radially outermost belt ply is not less than 0.70 times the maximum axial width of the contact patch.4. The pneumatic tire according to claim 1 , whereinthe contour of the radially outer surface of the tread portion in a meridian section of the tire is made up of arcs having different radii of ...

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Номер записи: 92
10-01-2019 дата публикации

TIRE HAVING MICROSIPES ALONG LATERAL EDGES

Номер: US20190009617A1
Автор: Brown Joseph Nicholas, Sanders Evan Charles
Принадлежит:

A tire is provided with a tread having microsipes along lateral edges such as the leading edge, trailing edge, or both of various tread features. The microsipes are oriented substantially along the longitudinal direction. In contravention of conventional teachings, the addition of these microsipes has been found to improve rolling resistance, dry braking, or both. The microsipes can be located along edges that are chamfered as well. 1. A tire defining longitudinal , radial , and axial directions , the tire comprising:a pair of opposing shoulders spaced apart along the axial direction;a tread portion extending between the shoulders, the tread portion comprisinga plurality of tread features, wherein each tread feature includes at least one leading edge extending along the axial direction and one trailing edge extending along the axial direction; anda plurality of microsipes positioned along the leading edge, the trailing edge, or both, the microsipes extending along the longitudinal direction and positioned adjacent to each other, wherein the microsipes form an angle with the longitudinal direction that is in the range of 0 degrees to 10 degrees.2. The tire of claim 1 , wherein the tread features comprise discrete tread blocks separated from each other along the axial and longitudinal direction by a plurality of grooves.3. The tire of claim 1 , wherein the leading edge claim 1 , the trailing edge claim 1 , or both claim 1 , are chamfered.4. The tire of claim 1 , wherein the microsipes form an angle with the longitudinal direction that is in the range of 0 degrees to 10 degrees.5. The tire of claim 1 , wherein the leading edge forms an angle with the longitudinal direction that is in the range of 0 degrees to 45 degrees.6. The tire of claim 1 , wherein the microsipes are spaced apart along the leading edge by a distance in the range of 4 mm to 6 mm.7. The tire of claim 1 , wherein the microsipes are spaced apart along the leading edge by a distance of about 5 mm.8. The ...

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Номер записи: 93
09-01-2020 дата публикации

Wheel comprising a non-pneumatic tire

Номер: US20200009916A1
Автор: Marc FAVRE, Ronald H. Thompson
Принадлежит: Individual

A wheel for a vehicle (e.g., a construction vehicle, an all-terrain vehicle, or other off-road vehicle) or other device, in which the wheel comprises a non-pneumatic tire and may be designed to enhance its use and performance and/or use and performance of the vehicle or other device, including, for example, to be able to be used longer and/or in more challenging conditions, such as, for instance, by being more thermally efficient (e.g., to avoid or reduce adverse effects such as rapid degradation in material properties that could otherwise arise due to excessive temperatures) and/or more resistant to cracking or other damage which could lead to premature failure (e.g., due to manufacturing artifacts and/or rocks and other hazards that can cut, chip, or tear it during use).

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Номер записи: 94
09-01-2020 дата публикации

Pneumatic Tire

Номер: US20200009917A1
Автор: Uchida Yuta
Принадлежит: THE YOKOHAMA RUBBER CO., LTD.

A pneumatic tire tread pattern includes a center main groove extending in a circumferential direction, first and second inclined lug grooves located on respective first and second sides in a lateral direction and extending from the center main groove toward the respective first and second sides in the lateral direction with respect to the circumferential direction, and inner branched lug grooves each branched from a middle of a corresponding one of the first and second inclined lug grooves, inclined identically to an inclination direction of the first and second inclined lug grooves, and connected to the center main groove. The first and second inclined lug grooves include a center portion extending outward from the center main groove in the lateral direction, an outer portion extending inward from a shoulder side in the lateral direction, and a bent portion at which the center and outer portions are bent and connected together. 1. A pneumatic tire with a tread portion provided with a tread pattern , the pneumatic tire comprising:a center main groove provided on a tire equator line and extending in a tire circumferential direction,a first inclined lug groove group including a plurality of first inclined lug grooves provided at intervals in the tire circumferential direction, each one of the first inclined lug grooves being provided on a first side across the center main groove in a tire lateral direction and extending, at any position in a ground contact region of the tread portion, from the center main groove in an inclination direction inclined with respect to the tire circumferential direction and the tire lateral direction while facing outward on the first side in the tire lateral direction and also facing in a first direction of the tire circumferential direction,a second inclined lug groove group including a plurality of second inclined lug grooves provided at intervals in the tire circumferential direction, each one of the second inclined lug grooves being ...

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Номер записи: 95
09-01-2020 дата публикации

PNEUMATIC TIRE

Номер: US20200009918A1
Автор: TANIGUCHI Jiro
Принадлежит: Toyo Tire Corporation

Groove widths of center main grooves are larger than groove widths of inner and outer main grooves. Plurality of lateral grooves are formed at intervals in a tire circumferential direction so as to define inner shoulder blocks belonging to an inner shoulder row. A first raised portion connecting a pair of inner shoulder blocks to each other is formed in the lateral grooves every one other on an inner main groove side. A depth of the lateral groove in the first raised portion is smaller than the depth of the lateral groove in other portions. A second raised portion is formed on the outer main groove in a region defined by an imaginary line connecting an outer intermediate block and an outer shoulder block. A depth of the outer main groove in the second raised portion is smaller than that of the outer main groove in other portions. 1. A pneumatic tire comprising:at least three main grooves extending in a tire circumferential direction and formed on a tread surface,wherein, between at least one pair of main grooves disposed adjacently to each other among the three main grooves, a plurality of blocks which are separated from a periphery by the main grooves and deep grooves are arranged in a row in the tire circumferential direction,wherein all of the plurality of blocks are formed of a composite block where a surface is divided by one or a plurality of shallow groove with sipes which have the sipes on a groove bottom,wherein a depth of the deep groove is set 0.85 to 1.0 times inclusive as large as a depth of a circumferential direction groove,wherein a depth of the shallow groove is set to 0.4 to 0.6 times inclusive as large as the depth of the circumferential direction groove, andwherein a depth of the sipe is set to 2 mm or less.2. The pneumatic tire according to claim 1 , wherein the one pair of main grooves is formed of two main grooves positioned on an outermost side in a state where the tire is mounted on the vehicle.3. The pneumatic tire according to claim 1 , ...

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Номер записи: 96
09-01-2020 дата публикации

Conjugated Diene Polymer, Conjugated Diene Polymer Composition, and Tire

Номер: US20200010579A1
Автор: YAMASAKI Hideki, Yasumoto Atsushi
Принадлежит:

A conjugated diene polymer satisfying following conditions (1) to (4): 1. A conjugated diene polymer satisfying following conditions (1) to (4):(1) the conjugated diene polymer has two or more peaks in a molecular weight distribution curve obtained by measurement with gel permeation chromatography (GPC);(2) the molecular weight distribution curve contains a peak (A) having a peak molecular weight of 500,000 to 2,500,000 and a peak (B) having a peak molecular weight of 150,000 to 600,000;(3) a total value of an area of the peak (A) and an area of the peak (B) is 70% or more of a total area of the molecular weight distribution curve; and(4) an absolute value of difference between a glass transition temperature of a conjugated diene polymer in the peak (A) (Tg (A)) and a glass transition temperature of a conjugated diene polymer in the peak (B) (Tg (B)) is 2° C. to 30° C.2. The conjugated diene polymer according to claim 1 , satisfying following expression (I):{'br': None, 'i': Tg', 'B', 'Tg', 'A, '()>()\u2003\u2003(I).'}3. The conjugated diene polymer according to claim 1 , wherein Tg (A) is −70° C. to −15° C. and Tg (B) is −68° C. to −13° C.4. The conjugated diene polymer according to claim 1 , wherein the conjugated diene polymer in the peak (A) contains 10 to 50% by mass of a vinyl aromatic compound and has a 1 claim 1 ,2-vinyl bond content of 20 to 70%.5. The conjugated diene polymer according to claim 1 , wherein the conjugated diene polymer in the peak (B) contains 10 to 50% by mass of a vinyl aromatic compound and has a 1 claim 1 ,2-vinyl bond content of 25 to 70%.6. The conjugated diene polymer according to claim 1 , wherein the total value of the area of the peak (A) and the area of the peak (B) is 80% or more of the total area of the molecular weight distribution curve.7. The conjugated diene polymer according to claim 1 , wherein the area of the peak (B) is 30% to 70% of the total area of the molecular weight distribution curve.8. The conjugated diene ...

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Номер записи: 97
15-01-2015 дата публикации

PNEUMATIC TIRE

Номер: US20150013865A1
Автор: Yoshikawa Toshihiko
Принадлежит: BRIDGESTONE CORPORATION

A pneumatic tire comprising one or more sipes having a depth (D) and, as seen in a widthwise section of the sipe, a perpendicular portion and a bend portion. The bend portion has, a first sub-bend point in a depth region of D/2-D/7, a main-bend point in a depth region of D/4-3D/4, and a second sub-bend point a depth region of D/2-6D/7, forming first and second inclined sections between the bend points. Each of the first and second inclined sections forms acute angles (θ1, θ2) of 30°≦θ1≦60° and 30°≦θ2≦60°, relative to a tangent of tread surface. The first inclined section has an area (a) and the second inclined section has an area (a), and ratios (a/A and a/A) of the area (a) and (a) to an orthographic projection area (A) of the sipe are not less than 0.1. 1. A pneumatic tire including a tread with land portions each having one or more sipes , characterized in that:the sipe has a depth (D) and comprises, as seen in a widthwise section of the sipe and in a depth direction from the tread surface (S), a perpendicular portion extending along a normal line of the tread surface at a center of an opening of the sipe, and a bend portion bending across the perpendicular portion toward one side and then toward the other;the bend portion comprises, in an order in the depth direction, a first sub-bend point in a depth region of D/7-D/2, a main-bend point in a depth region of D/4-3D/4, and a second sub-bend point in a depth region of D/2-6D/7, wherein a first inclined section is formed between the first sub-bend point and the main-bend point, and a second inclined section is formed between the main-bend point and the second sub-bend point; andthe first inclined section forms an acute angle θ1 with relative to a tangent at an opening end of the sipe in the tread surface, wherein the acute angle θ1 of the first inclined section is 30°≦θ1≦60°, and the second inclined section forms an acute angle θ2 relative to said tangent, wherein the acute angle θ2 of the second inclined section ...

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Номер записи: 98
03-02-2022 дата публикации

MOTORCYCLE TIRE

Номер: US20220032690A1
Автор: KOBORI Shuji
Принадлежит: SUMITOMO RUBBER INDUSTRIES, LTD.

A motorcycle tire includes a tread portion, a carcass, a breaker layer disposed outside the carcass with cords oriented at an angle equal to or more than 15 degrees with respect to a tire equator, and a tread rubber disposed outside the breaker layer so as to form a band-less structure in which the tread rubber is arranged so as to be directly in contact with the breaker layer. The tread rubber includes a cap rubber layer forming a ground contacting surface of the tread portion, and a base rubber layer disposed inside the cap rubber layer and having complex modulus greater than that of the cap rubber layer. The base rubber layer extends between a pair of outermost ends thereof so as to across the tire equator, and a thickness of the base rubber layer at the tire equator is greater than that of the outermost ends. 1. A motorcycle tire comprising:a tread portion having a ground contacting surface;a carcass;a breaker layer disposed outwardly in a tire radial direction of the carcass in the tread portion, the breaker layer comprising one or more breaker plies having a plurality of cords oriented at an angle equal to or more than 15 degrees with respect to a tire equator; anda tread rubber disposed outwardly in the tire radial direction of the breaker layer so as to form a band-less structure in which the tread rubber is arranged so as to be directly in contact with the breaker layer in the tire radial direction, wherein a cap rubber layer forming the ground contacting surface of the tread portion, and', 'a base rubber layer disposed inwardly in the tire radial direction of the cap rubber layer and having complex modulus greater than that of the cap rubber layer,, 'the tread rubber comprises'}the base rubber layer extends between a pair of outermost ends thereof so as to across the tire equator, anda thickness of the base rubber layer at the tire equator is greater than that of the outermost ends.2. The motorcycle tire according to claim 1 , whereina thickness of the ...

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Номер записи: 99
03-02-2022 дата публикации

PNEUMATIC TIRE

Номер: US20220032691A1
Автор: IWABUCHI Kotaro, Wada Hironori
Принадлежит:

A pneumatic tire includes a circumferential main groove extending in a tire circumferential direction and a land portion defined by the circumferential main groove. The circumferential main groove includes a groove opening portion and a groove bottom portion each having a zigzag shape or a wave-like shape with an amplitude in a tire width direction. An outer maximum amplitude position of an outer edge portion in the groove opening portion is disposed to be offset in a tire circumferential direction with respect to an outer maximum amplitude position of an outer edge portion of the corresponding groove bottom portion. 1. A pneumatic tire , comprising:a circumferential main groove extending in a tire circumferential direction; anda land portion defined by the circumferential main groove,the circumferential main groove comprising a groove opening portion and a groove bottom portion each having a zigzag shape or a wave-like shape with an amplitude in a tire width direction,in each of the groove opening portion and the groove bottom portion, an outer edge portion on an outer side in the tire width direction being defined, an outer maximum amplitude position projecting to the outer side in the tire width direction and an inner maximum amplitude position projecting to an inner side in the tire width direction being defined in the outer edge portion, andthe outer maximum amplitude position of the outer edge portion in the groove opening portion being disposed to be offset in the tire circumferential direction with respect to the outer maximum amplitude position of the outer edge portion of the groove bottom portion.211oo. The pneumatic tire according to claim 1 , wherein an offset amount φoo between the outer maximum amplitude positions in the outer edge portions of the groove opening portion and the groove bottom portion has a relationship 0.03≤φoo/λ≤0.45 to a wavelength λof the outer edge portion of the groove opening portion.31122oooo. The pneumatic tire according to ...

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Номер записи: 100