Goodyear Patente

A pneumatic tire is disclosed comprising a tread (10, 100, 200) with a ground engaging surface, the tread being a dual-layer tread made of or comprising a first layer (11, 101, 201) comprising a first tread compound having a loss compliance LC(1) and a loss modulus E"(1) and a second layer (12, 102, 202) comprising a second tread compound having a loss compliance LC(2) and a loss modulus E"(2); wherein both of the loss compliance LC(1) and LC(2) and wherein both of the loss modulus E"(1) and E"(2) are determined by a dynamic mechanical analysis (DMA) system at a frequency of 10 Hz under pre-strain of 10% and dynamic strain of 2.5% within a temperature sweep from 0 to 130 °C. The volume ratio of the second tread compound relative to the first tread compound in the tread is in the range of from 0.5:1 to 10:1. When the tread temperature is in the range of from 5 to 50°C, LC(1) > LC(2), and/or when the tread temperature is in the range of from 0 to 20°C, E"(1) > E"(2).

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A non-pneumatic tire and wheel assembly (10) is disclosed comprising a wheel structure (50) and a spoke ring structure (20) formed of one or more segments (22a, 24a, 26a) arranged to form an annular spoke ring. The spoke ring structure (20) has a plurality of spoke members (60, 62). Further, a radially outer tread ring (30) mounted on the outer circumference of the spoke ring structure (20) is provided. The non-pneumatic tire and wheel assembly (10) can be manufactured by three-dimensional printing.

A pneumatic tire having a tread with an outer surface defined for ground contact is disclosed. The tread has a first tread zone (30) and a second tread zone (40), wherein the first tread zone (30) includes a central portion of the tread and wherein the second tread zone (40) is located laterally adjacent the first tread zone (40), preferably on both lateral sides of the first tread zone (30). The first tread zone (30) is formed of a first rubber compound and the second tread zone (40) is formed of a second rubber compound different from the first rubber compound. The first rubber compound has a G', measured at 100°C, 1 Hz and at 50% strain in the range of from 1.6 to 1.8 MPa and/or the second rubber compound has a G', measured at 100°C, 1 Hz and 100% strain in the range of from 0.75 to 0.90 MPa.

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A process for manufacturing a tire tread molding element is disclosed. The process comprises the steps of: providing a first tread molding element (15); forming a reverse tread molding element of the first tread molding element, wherein the reverse tread molding element is made of a first plastic composition comprising one or more elastomers; and casting a second tread molding element from the reverse mold to obtain a second tread molding element; wherein the second tread molding element is made from a second plastic composition comprising one or more thermosetting resins. Also, a method for manufacturing a tire or a section of a tire is disclosed. The method comprises providing one or more tread molding elements made from the disclosed process and molding a tire or a portion of a tire using said one or more tread molding elements.

An irregular wear detection system (10) and method for a tire (12) supporting a vehicle (14) is disclosed. The system comprises a sensor unit (26) being mounted on the tire (12), the sensor unit including a footprint centerline length measurement sensor to measure a centerline length of a footprint (32) of the tire; a processor (36) in electronic communication with the sensor unit (26), the processor being configured for receiving a plurality of measured centerline lengths over time; and an analysis module (52) stored on the processor (36). The analysis module (52) is configured to receive the measured centerline lengths as inputs and to detect irregular wear of the tire (12) from the measured footprint centerline lengths, and the analysis module (52) is further configured to generate an irregular wear determination when the measured footprint centerline lengths remain the same or increase.

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A non-pneumatic tire (100) is disclosed comprising a spoke (102), the spoke comprising a first leg (202) extending from a shear band (103) to a hub (106) and a second leg (204) extending from the shearband (103) to the first leg (202). In one aspect, the non-pneumatic tire (100) comprises a plurality of spokes (102) positioned between a shear band (103) and a hub (106), wherein the plurality of spokes each have a Y-shaped architecture composed of a first side comprising a first leg (202) and a second leg (204) extending along the same plane in a radial direction of the non-pneumatic tire (100), and of a second side comprising a third leg (206) that is oriented at an angle to the second leg (204), and wherein a first spoke (102a) from the plurality of spokes (102) and a second spoke (102b) from the plurality of spokes (102) are orientated likewise along a circumferential direction of the non-pneumatic tire (100).

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