Goodyear Patente

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A tire comprising a tire carcass having a tire cavity (30) defined by a tire inner liner (46), first and second sidewalls (24) extending respectively from first and second tire bead regions (26) to a tire tread region; and an air tube-receiving groove (38) formed within a tire carcass wall at a prescribed radial location, the groove (38) having an access opening (41), a primary internal groove chamber (39) and a secondary groove chamber (40) adjacent to and communicating with the internal groove chamber (39) for operationally receiving an air-pump tube extended portion is disclosed. The tire further comprises partial passageway means (42A) located at a prescribed outlet location along the air tube-receiving groove (38), the passageway means (42A) extending from the groove (38) partially through the tire carcass wall toward the tire cavity (30) and having an axially inward terminal end (48) separated from the tire inner liner (46) by a removable tire carcass barrier (44) of reduced sectional thickness relative to the tire carcass wall. Also, a method of constructing such a tire is disclosed.

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An apparatus for applying a mixture of a first compound and a second compound is disclosed. The apparatus (10) comprises a first extruder (8) in fluid communication with a first gear pump (5) for processing a first compound (A); and a second extruder (40) in fluid communication with a second gear pump (42) for processing a second compound (B), wherein the outlet from each of said first and second gear pump is in fluid communication with an inlet (22) of a main extruder (20). Also a method of applying a blended rubber composition directly onto a tire building drum or core using such an apparatus (10) is disclosed.

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A pneumatic tire comprising a carcass (6) extending between bead portions (4) through sidewall portions (3) and a tread portion (2); and a belt reinforcement structure disposed radially outside of the carcass (6) and radially inside of the tread portion (2) is disclosed. The belt reinforcement structure comprises an overlay (9) comprising a strip (T) including parallel cords, wherein the overlay (9) is wound spirally and circumferentially from a first axially outer side of the overlay (9) to a second axially outer side of the overlay (9), the distance between corresponding parts of adjacent strip windings defining a winding pitch (PA, PB). The winding pitch (PA, PB) of the strip (T) changes in an axially inward direction of the pneumatic tire (1) towards the equatorial plane (EP) of the pneumatic tire (1) such that the winding pitch (PA) in a central region (7A) of the belt reinforcement structure is increased relative to respective first and second axially outer sides of the overlay (9) on each side of the equatorial plane (EP) of the pneumatic tire (1). The winding pitch (PB) of the strip (T) at both axially outer sides of the overlay (9) is in a range from 55% to 233% of the width (w) of the strip (T). The width of the central region (7A) is in a range from 1/3 to 7/8 of the width of the belt reinforcement structure. The overlay (9) comprises spaces in a range of from 4 mm to 20 mm or in a range of from 27% to 133% of the width of the strip (T) in the central region (7A) between axially adjacent edges of the strip (T) of the overlay (9).

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A functionalized elastomer comprising the reaction product of a living anionic elastomeric polymer and a polymerization terminator of formula I <img class="EMIRef" id="469597158-ia01" /> is disclosed. The functionalized elastomer may be part of a rubber composition for use in the tire.

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A tire system and a method of maintaining air in a pneumatic tire is disclosed. The system comprises a tire having a tire carcass comprising a tire cavity defined by a tire inner liner, and first and second sidewalls extending respectively from first and second tire bead regions to a tire tread region; compression actuator means (19) mounted to the tire carcass configured for operative actuation by tire deformation during a tire revolution; and a pump assembly (20) affixed to the tire carcass and comprising a compressor body (62) affixed to the compression actuator means and having an internal air chamber (64). The internal air chamber has an inlet opening (66) for admitting air into the internal air chamber and an outlet opening (70) for conducting air from the internal air chamber to the tire cavity. The compressor body (62) further comprises a piston valve member (74) operationally moving within the internal air chamber responsive to actuation by or contacting engagement with the compression actuator means (19) to compress air within the internal air chamber (64).

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A hybrid cord having a Nylon core yarn (32) and an Aramid wrap yarn (34) wrapped around the Nylon core yarn (32) is disclosed. The hybrid cord (30) has the cord construction: (A/1 Aramid + B/1 Nylon) [(x)Z+(y)Z]/(z)S or (A/1 Aramid + B/1 Nylon) [(x)S+(y)S]/(z)Z wherein A is the weight per length of the Aramid wrap yarn (34) and is in a range of from 900 to 1100 Denier, B is the weight per length of the Nylon cord yarn (32) in a range of from 700 to 900 Denier, x is the number twists per 2.54 cm of the Aramid wrap yarn (34) and is in a range of from 4 to 6, y is the number twists per 2.54 cm of the Nylon core yarn (32) and is in a range of from 4 to 6, and z is the number twists per 2.54 cm of the hybrid cord (30) and is in a range of from 4 to 6. Also, a pneumatic tire comprising such a hybrid cord is disclosed.

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