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公开(公告)号：US20220410627A1
公开(公告)日：2022-12-29
申请号：US17755334
申请日：2020-11-03
Applicant: Pirelli Tyre S.p.A.
Inventor： Luca BRUSCHELLI , Nicola FORCONI , Mario MARIANI , Matteo TORCHIANA
Abstract: A motorcycle tyre (1) is described comprising an equatorial plane (X-X) and a tread band (8) comprising a radially inner portion (13) and a radially outer portion (11) respectively comprising a first and a second vulcanized elastomeric material obtained by vulcanizing respective elastomeric materials comprising 100 phr of at least one elastomeric diene polymer, from 30 to 130 phr of at least one reinforcing filler comprising an amount greater than 75% or, respectively, equal to or greater than 80% of a white filler. In the tyre (1) the ratio R1 between the dynamic elastic modulus (E′) and the tandelta measured at a frequency of 10 Hz and at 70° C. of the first vulcanized elastomeric material is comprised between 27 and 35, whereas the ratio R2 between the dynamic elastic modulus (E′) and the tandelta measured at a frequency of 10 Hz and at 70° C. of the second vulcanized elastomeric material is comprised between 15 and 30, the ratio R1/R2 being greater than or equal to 1.1.
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公开(公告)号：US20220105698A1
公开(公告)日：2022-04-07
申请号：US17549380
申请日：2021-12-13
Applicant: PIRELLI TYRE S.P.A.
Inventor： Oliver HAUPT , Maurizio MARCHINI , Silvio MONTANARI , Mario MARIANI , Davide Lupo CONTI
Abstract: A carcass sleeve is situated in a radially external position with respect to a toroidal forming drum, arranged in a first radially contracted operative condition. The carcass sleeve is shaped according to a toroidal configuration while the forming drum is positioned inside the carcass sleeve. During shaping of the carcass sleeve, the forming drum is radially expanded up to a second radially expanded operative condition. Upon completed shaping, the carcass sleeve is coupled to the forming drum in the second operative condition. The forming drum, coupled to the shaped carcass sleeve, is arranged in proximity to at least one device for building at least one belt layer at a radially external position relative to the shaped carcass sleeve.
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公开(公告)号：US20210197509A1
公开(公告)日：2021-07-01
申请号：US17183325
申请日：2021-02-23
Applicant: Pirelli Tyre S.p.A.
Inventor： Maurizio MARCHINI , Mario MARIANI , Silvio MONTANARI , Oliver HAUPT
Abstract: The invention is related to a process and an apparatus for building tyres. In the process a carcass sleeve (11) comprising at least one carcass ply (3) and a pair of annular anchoring structures (5) is transferred to a shaping drum (14) comprising flange elements (16a, 16h) that are each engageable to one of said annular anchoring structures (5). The carcass sleeve (11) is shaped according to a toroidal configuration by means of mutual axial approaching of the flange elements (16a, 16b). Before shaping, annular grip elements (36) respectively carried by the flange elements (16a, 16b) are radially expanded each inside one of the annular anchoring structures (5) in order to engage the carcass sleeve (11). The annular anchoring structures (5) are moved axially apart from each other before engaging the carcass sleeve (11) by means of the annular grip elements (36).
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公开(公告)号：US20190275835A1
公开(公告)日：2019-09-12
申请号：US16343738
申请日：2017-11-20
Applicant: PIRELLI TYRE S.P.A.
Inventor： Barbara RAMPANA , Lisa GRASSI , Mario MARIANI , Pierangelo MISANI
Abstract: Motorcycles tyre including a carcass structure, a zero-degree belt structure arranged in a radially outer position with respect to the carcass structure and a tread band arranged in a radially outer position with respect to the belt structure. The belt structure includes at least one hybrid reinforcing cord that has an elongation greater than 4% when subjected to a load equal to about 50 N and a tangent modulus with a monotonic progression as the elongation increases for elongations comprised between 4% and at least 9%.
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公开(公告)号：US20200247075A1
公开(公告)日：2020-08-06
申请号：US16836545
申请日：2020-03-31
Applicant: PIRELLI TYRE S.P.A.
Inventor： Oliver HAUPT , Maurizio MARCHINI , Silvio MONTANARI , Mario MARIANI , Davide Lupo CONTI
Abstract: A carcass sleeve is situated in a radially external position with respect to a toroidal forming drum, arranged in a first radially contracted operative condition. The carcass sleeve is shaped according to a toroidal configuration while the forming drum is positioned inside the carcass sleeve. During shaping of the carcass sleeve, the forming drum is radially expanded up to a second radially expanded operative condition. Upon completed shaping, the carcass sleeve is coupled to the forming drum in the second operative condition. The forming drum, coupled to the shaped carcass sleeve, is arranged in proximity to at least one device for building at least one belt layer at a radially external position relative to the shaped carcass sleeve.
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Patent Agency Ranking
公开(公告)号：US20180264886A1
公开(公告)日：2018-09-20
申请号：US15764856
申请日：2016-09-29
Applicant: PIRELLI TYRE S.P.A.
Inventor： Luca BRUSCHELLI , Mario MARIANI , Giuliano BONACCORSI
IPC: B60C11/03
CPC classification number: B60C11/033 , B60C11/0302 , B60C11/032 , B60C2011/0372 , B60C2011/0374 , B60C2200/10
Abstract: A motorcycle tyre with a low void-to-rubber ratio while providing a stiffness suitable for good performance on dry ground and on track. A tread band with grooves is arranged to provide a draining effect without structurally weakening the tread band. According to one aspect, the tread band has a tread pattern with two pairs of grooves having segments or portions that produce a warming effect when the compound of the tread band is cold. The tread band provides grip to the ground and limited local warming when the compound of the tread band is at the operating temperature or when driving on dry ground, to provide stiffness and readiness of response.
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公开(公告)号：US20180009265A1
公开(公告)日：2018-01-11
申请号：US15656451
申请日：2017-07-21
Applicant: Pirelli Tyre S.p.A.
Inventor： Mario MARIANI , Sandro GALLO , Andrea SCHIAVOLIN , Pierangelo MISANI
IPC: B60C11/03
CPC classification number: B60C11/0302 , B60C11/032 , B60C11/033 , B60C2011/0372 , B60C2011/0374 , B60C2011/0388 , B60C2200/10 , Y10T29/49538
Abstract: 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.
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公开(公告)号：US20250050685A1
公开(公告)日：2025-02-13
申请号：US18718268
申请日：2022-12-16
Applicant: Pirelli Tyre S.p.A.
Inventor： Giuliano BONACCORSI , Matteo TORCHIANA , Mario MARIANI , Federica FREZZA , Luca NAPOLITANO , Giuseppe PEZZULLO
Abstract: A motorcycle tyre, comprising a radial carcass structure (2) and a tread band (8) applied at a radially outer position with respect to the radial carcass structure (2), wherein the radial carcass structure (2) comprises a first carcass ply (3a) and a second carcass ply (3b) including a first plurality of textile reinforcing cords (30) and a second plurality of textile reinforcing cords (32), respectively, wherein the first textile reinforcing cords (31) are parallel to each other and the second textile reinforcing cords (33) are parallel to each other and have a respective first and second inclination at a crown portion (8c) of the tread band (8) with respect to an equatorial plane (X-X) of the tyre, wherein said second inclination is opposite to said first inclination. The first textile reinforcing cords (31) and the second textile reinforcing cords (33) have a tenacity comprised between 0.35 cN/Tex and 1.2 cN/Tex at 2% elongation and comprised between 0.5 cN/Tex and 3 cN/Tex at 5% elongation. At least one central annular sector (8a) of the tread band (8) arranged astride of the equatorial plane (X-X) is made of a vulcanized elastomeric material having a static elastic modulus Ca3 measured at 70° C. comprised between 9.0 and 14.0, a tandelta measured at 70° C. and 10 Hz comprised between 0.120 and 0.160, and a dynamic elastic modulus F measured at 70° C. and 10 Hz comprised between 3.7 and 4.1.
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公开(公告)号：US20250026155A1
公开(公告)日：2025-01-23
申请号：US18710944
申请日：2022-11-11
Applicant: Pirelli Tyre S.p.A.
Inventor： Mario MARIANI , Giuliano BONACCORSI , Alessio CASALI
IPC: B60C11/11
Abstract: A tyre for vehicle wheels comprises a tread band including a plurality of blocks and grooves that define in the tread band a void/solid ratio comprised between 0.4 and 0.65 and that form a tread pattern which is symmetrical with respect to an equatorial plane (X-X) of the tyre. The tread pattern includes a pair of circumferential grooves (20) arranged on opposite sides with respect to the equatorial plane and which define a central annular portion of tread band and a pair of lateral annular portions of tread band arranged on opposite sides with respect to said central annular portion. The central annular portion of tread band comprises a plurality of circumferentially consecutive central blocks (30, 60) arranged astride of the equatorial plane and having a maximum width equal to, or greater than. 50% of a radial section maximum width of the tyre. The central blocks (30, 60) are separated from one another by a respective central transversal groove (45, 50) having a circumferential length less than that of a circumferentially adjacent central block (30, 60). Each lateral annular portion of tread band comprises a plurality of circumferentially consecutive lateral blocks (80, 90) separated from one another by a respective lateral transversal groove (85, 95).
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公开(公告)号：US20220001699A1
公开(公告)日：2022-01-06
申请号：US17295014
申请日：2019-11-29
Applicant: Pirelli Tyre S.p.A.
Inventor： Mario MARIANI , Luca BRUSCHELLI , Giuliano BONACCORSI
IPC: B60C11/03
Abstract: A motorcycle tyre (1) has a tread band (1) comprising a plurality of grooves that form at least part of a tread pattern including a module (T) replicated along a circumferential direction and having a predetermined circumferential length (Cl). The module (T) comprises a pair of circumferential grooves (20) arranged on opposite sides with respect to the equatorial plane (X-X) of the tyre (1). Such circumferential grooves (20) extend along the circumferential direction for at least part of said predetermined circumferential length (Cl) and define between them a central annular portion (A) of tread band (8) having a void to solid ratio substantially equal to zero and a predetermined axial width (Al). The module (T) further comprises a pair of first lateral annular portions (B) arranged on opposite sides with respect to the equatorial plane (X-X) in an axially outer position with respect to said pair of circumferential grooves (20) and each having a void to solid ratio substantially equal to zero, and a plurality of transversal grooves (30, 31, 32, 33) arranged on opposite sides with respect to the equatorial plane (X-X), in an axially outer position with respect to said pair of first lateral annular portions (B). The tyre (1) has a curvature ratio lower than about 0.4.
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