Goodyear Patente

Pneumatic tire comprising two annular bead portions having a bead core (2) and a carcass extending between the bead portions through sidewall portions and a tread portion is disclosed. The carcass includes at least two axially inner plies (1A, 1B, 1C, 1D, 1 E) which extend down from the tread and axially inward of the bead core (2), said at least two axially inner plies (1 A, 1 B, 1 C, 1D, 1 E) being wound around the bead core (2) forming respective turn-ups (10A, 10B, 10C, 10D, 10E), each turn-up (10A, 10B, 10C, 10D, 10E) being located axially outward of the bead core (2). The carcass further includes a first axially outer ply (1 F) which extends down from the tread towards the bead core (2) and which is positioned axially outward of the bead core (2). The first axially outer ply (1 F) is separated from at least one of the turn-ups (10A, 10B, 10C, 10D, 10E) by a first spacer layer (200).

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A tire is disclosed having a circumferential tire tread and an underlying and supporting carcass comprising at least one uncured cord reinforced rubber ply (3) extending from spaced apart tire beads through the crown of the tire and a preferably pre-formed laminated tire innerliner (2). The laminated tire innerliner (2) comprises an alloy film (4) cohesively bonded to said uncured cord reinforced rubber ply (3), wherein both sides of said alloy film (4) contain an RFL adhesive coating (5A, 5B), and wherein said alloy film (4) is cohesively bonded to said uncured cord reinforced rubber ply (3) by said RFL coating (5A, 5B) on said alloy film (4). The laminated tire innerliner (2) is a circumferential innerlayer of the tire having its ends joined together in an overlapped configuration to thereby form an RFL cohesively bonded splice (6). The alloy film (4) comprises at least 50 percent by weight of a thermoplastic polymer comprising at least one of nylon or polyester terephthalate and a second or minor portion of at least one of a dispersion of elastomer domains comprising at least one diene-based elastomer, and a polymer comprising at least one of polyalkylene glycol, polyoxyalkylene diamine and copolymers thereof. Also, a method of preparing a tire is disclosed.

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A self-inflating tire assembly comprising a tire having a tire cavity, a first and second sidewall extending respectively from first and second tire bead regions to a tire tread region is disclosed. The tire has an air passageway, the air passageway having an inlet end and an outlet end and being operative to allow a portion of the air passageway near a tire footprint to substantially close the passageway. The outlet end of the air passageway is in fluid communication with the tire cavity. A valve device is connected to an end of the air passageway, the valve device including an insert mounted in the tire. A valve body is mounted within the valve insert. The valve body has an interior chamber, said interior chamber having a first hole in fluid communication with the end of the air passageway, and a channel in fluid communication with the ambient air. Also, alternative self-inflating tire assemblies are disclosed as well as valve devices for use with such tires.

A vulcanizable rubber composition for use in a tread of a pneumatic tire is disclosed. The rubber composition comprises, based on 100 parts by weight of elastomer (phr), 100 phr of a diene based elastomer having a glass transition temperature of less than -50 °C; from 30 phr to 65 phr of a fatty acid monoester of formula (1) where R 1 is selected from a C1 to a C8 linear or branched alkyl, a C1 to a C8 linear or branched alkenyl, or a C2 to a C6 linear or branched alkyl substituted with from one to five hydroxyl groups, R 2 is a C11 to a C21 alkyl or a C11 to a C21 alkenyl; less than 10 phr of a petroleum-derived oil; and from 50 to 130 phr of silica.

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A nozzle and roller apparatus is disclosed. The apparatus comprises a rotatable roller (300) having an outer surface and a nozzle (210) having an inlet and an outlet. The nozzle (210) has a curved surface having an opening (231). The curved surface is positioned in mating engagement with an outer surface of the rotatable roller (300). Also, a method of forming a strip of elastomeric material is disclosed. The method comprising the steps of: positioning a lower curved surface of a nozzle (210) in mating engagement with a rotatable roller (300), pumping a preferably molten elastomeric material through the nozzle (210), said nozzle having an outlet on the lower surface, extruding the preferably molten elastomeric material onto the roller outer surface, and extruding the preferably molten elastomeric material through the outlet of the nozzle (210) forming the shaped strip.

A method of estimating a load bearing on a vehicle tire (12) is disclosed. The method comprises: deploying a deformation measuring sensor (16) in the tire (12), the deformation measuring sensor (16) generating a cyclical tire deformation signal indicative of tire deformation in a contact patch of a rolling tire; deploying a tire inflation pressure measuring sensor (22) in the tire (12), the inflation pressure measuring sensor measuring tire inflation pressure from within a tire cavity, and calculating a tire rolling speed estimation based upon the tire deformation signal; calculating a tire contact patch length estimation based upon the tire deformation signal; and calculating a load estimation on the tire (12) based upon the tire inflation pressure, the tire contact patch length estimation, and the tire rolling speed estimation. Also, a system of estimating a load bearing on a vehicle tire is disclosed. The system comprises a vehicle tire (12) supporting a load; an inflation pressure measuring sensor (22); and a deformation measuring sensor (16). The deformation measuring sensor (16) comprises a piezoelectric sensor. Furthermore, the system comprises a programmed data processor for calculating a contact patch length estimation from the deformation signal; a programmed data processor for calculating a tire rolling speed estimation from the deformation signal; and an artificial neural network programmed to adaptively interpret the tire rolling speed estimation, the contact patch length estimation, and the measured inflation pressure of the tire and generate an output load estimation based thereon.

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