Reinforcement package for tires
AssigneeThe Goodyear Tire & Rubber Company
InventorsRobert Allen Losey, Alfredo Guillermo Causa
Life of this patent
Estimating the term…
Abstract
A pneumatic tire (10) having a reinforcement package including a mid-ply belt having reinforcement at a 0° angle with respect tothe equatorial plane (EP) of the tire shows improved handling and durability. The mid-ply belt comprises reinforcing cords or filaments (28) that are discontinuous. The dicontinuous cords or filaments (28) make possible the production of a uniform tire in most tire designs, and the reinforcement of the mid-ply belt provides a tire with improved durability and handling properties. A tire with superior properties was produced using reinforcing cords or filaments (27) and (28) which are made from polyethylene napthalate.
Claims17
A pneumatic tire comprising at least two parallel annular beads (12), at least one carcass ply (14) wrapped around said beads, tread (16) disposed over said carcass plies in a crown area of said tire, sidewalls (18) disposed between said tread (16) and said beads (12), and a reinforcement package (15a-e) comprising a plurality of belts or breakers disposed between said tread (16) and carcass (14), wherein said reinforcement package (15a-e) has at least one lower belt (23,24,34,44,54) comprising continuous parallel reinforcement cords or filaments disposed radially inward in said reinforcement package, at least one upper belt (21,22,32,42,52) comprising continuous parallel reinforcement cords or filaments disposed radially outward in said reinforcement package, and at least one middle reinforcement ply (25,26,36,46,56) comprising discontinuous parallel textile reinforcement cords or filaments (28) disposed between said upper and lower belts wherein said discontinuous textile cords or filaments (28) are oriented parallel to the centerline (31) of said reinforcement package (15a-e) and wherein the end count of reinforced cords or filaments (28) in a mid-ply belt comprises 50% to 90% of the end count of the reinforcement cords (27) of an upper or lower belt.
A pneumatic tire comprising at least two parallel annular beads (12), at least one carcass ply (14) wrapped around said beads, tread (16) disposed over said carcass plies in a crown area of said tire, sidewalls (18) disposed between said tread (16) and said beads (12), and a reinforcement package (15a-e) comprising a plurality of belts or breakers disposed between said tread (16) and carcass (14), wherein said reinforcement package (15a-e) has at least one lower belt (23,24,34,44,54) comprising continuous parallel reinforcement cords or filaments disposed radially inward in said reinforcement package, at least one upper belt (21,22,32,42,52) comprising continuous parallel reinforcement cords or filaments disposed radially outward in said reinforcement package, and at least one middle reinforcement ply (25,26,36,46,56) comprising discontinuous parallel reinforcement cords or filaments (28) disposed between said upper and lower belts wherein said discontinuous cords or filaments (28) are oriented parallel to the centerline (31) of said reinforcement package (15a-e) and wherein the end count of reinforcement cords (28) in the at least one middle reinforcement ply comprises 50% to 90% of the end count of the reinforcement cords (27) of an upper or lower belt.
Dependencies are inferred from the claim text.