Use of flat wire as a reinforcement in the belt package of a pneumatic tire
AssigneeThe Goodyear Tire & Rubber Company
InventorsDavid A. Kindry, Jerold R. Buenger, Roger D. Emerson, Richard M. Oblath, Roger A. Fleming
Life of this patent
Estimating the term…
Abstract
The tread reinforcing belt structure (24) of a pneumatic tire (10) has at least one belt ply (29) of flat steel wire. The belt ply of flat steel wire is stiffened by other components of the tread reinforcing structure such as belt plies of steel cables (28,30). It is especially important that the axially outermost edge portions of the belt ply of flat steel wires be supported by other components of the tread reinforcing belt structure, and that the flat wire have specific cross-sectional dimensions.
Claims14
A pneumatic tire having a tread reinforcing structure comprising:
- (a) a first belt ply comprising side by side steel cables, said steel cables being oriented at an angle of between 15.degree. and 25.degree. with respect to the mid-circumferential centerplane of the tire;
- (b) a second belt ply disposed radially outwardly of said first belt ply and comprising side by side flat steel wires, said flat steel wires having a thickness in the range of 0.18 mm to 0.51 mm and a width in the range of 0.9 mm to 5.1 mm and having a ratio of width to thickness in the range of 3 to 9, said flat steel wires being disposed at an angle in the range of 30.degree. to 45.degree. with respect to the mid-circumferential centerplane of the tire;
- and
- (c) a third belt ply disposed radially outwardly of the second belt ply and comprising side by side steel cables, said steel cables being oriented at an angle of between 15.degree. and 25.degree. with respect to the mid-circumferential centerplane of the tire, the first and third belt plies both extending axially outwardly of the second belt ply on both sides of the mid-circumferential centerplane of the tire.
A pneumatic tire having a tread reinforcing structure comprising:
- (a) a first belt ply comprising side by side steel cables, said steel cables being oriented at an angle of between 15.degree. and 25.degree. with respect to the mid-circumferential centerplane of the tire;
- (b) a layer of an elastomeric material in juxtaposition with and radially outwardly of said first belt ply, said elastomeric material containing aramid pulp;
- (c) a second belt ply in juxtaposition with and radially outwardly of said layer of elastomeric material, said second belt ply comprising side by side flat steel wires, said flat steel wires having a thickness in the range of 0.18 mm to 0.51 mm and a width in the range of 0.9 mm to 5.1 mm and having a ratio of width to thickness in the range of 3 to 9, said flat steel wires being disposed at an angle in the range of 27.degree. to 35.degree. with respect to the mid-circumferential centerplane of the tire;
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- (d) a ply of nonmetallic cords in juxtaposition with and radially outwardly of said second belt ply, said nonmetallic cords being oriented at between 0.degree. and 10.degree. with respect to the mid-circumferential centerplane of the tire.
Dependencies are inferred from the claim text.