Agricultural tire tread
First Claim
1. A pneumatic agricultural tire having an equatorial plane separating a first side and a second side of the tire, comprising:
- a tread having an inner tread surface, first lugs on the first side of the tire extending from a first lateral tread edge toward the equatorial plane and second lugs on the second side of the tire extending from the second lateral tread edge toward the equatorial plane, the first and second lugs extending radially outward from the inner tread surface and having an R-1W depth, wherein none of the first and second lugs cross the equatorial plane;
a first inner sixth of the tread extending between the equatorial plane and a first inner circumferential reference plane on the first side disposed axially one-sixth of a tread width from the equatorial plane;
a second inner sixth of the tread extending between the equatorial plane and a second inner circumferential reference plane on the second side disposed axially one-sixth of the tread width from the equatorial plane;
a first middle sixth of the tread extending between the first inner circumferential reference plane and a first middle circumferential reference plane on the first side disposed axially one-sixth of the tread width from the first inner circumferential reference plane;
a second middle sixth of the tread extending between the second inner circumferential reference plane and a second middle circumferential reference plane on the second side disposed axially one-sixth of the tread width from the second inner circumferential reference plane;
a first outer sixth of the tread extending between the first middle circumferential reference plane and a first outer circumferential reference plane on the first side disposed axially one-sixth of the tread width from the first middle circumferential reference plane;
a second outer sixth of the tread extending between the second middle circumferential reference plane and a second outer circumferential reference plane on the second side disposed axially one-sixth of the tread width from the second middle circumferential reference plane; and
a net tread volume ratio of the first and second lugs is approximately 40 percent, and between 36 and 39 percent of a volume of the first and second lugs is in the first and second inner sixths of the tread, between 32 to 35 percent of the volume of the first and second lugs is in the first and second middle sixths of the tread, and 27 to 30 percent of the volume of the first and second lugs is in the first and second outer sixths of the tread.
1 Assignment
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Accused Products
Abstract
An agricultural tire has an equatorial plane separating first and second sides. First and second inner sixths of the treads extend between the equatorial plane and circumferential reference planes disposed axially one-sixth of a tread width on either side of the equatorial plane. First and second middle sixths of the tread extend between inner circumferential planes and middle circumferential reference planes one-sixth of the tread width from the inner circumferential reference planes. Outer sixths extend between the middle circumferential reference planes and outer circumferential reference planes disposed one-sixth of the tread width from the middle planes. Net tread volume ratio is approximately 40 percent, where between 36 and 39 percent of lug volume is in the inner sixths, between 32 to 35 percent in the middle sixths, and 27 to 30 percent in the outer sixths of the tread.
188 Citations
18 Claims
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1. A pneumatic agricultural tire having an equatorial plane separating a first side and a second side of the tire, comprising:
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a tread having an inner tread surface, first lugs on the first side of the tire extending from a first lateral tread edge toward the equatorial plane and second lugs on the second side of the tire extending from the second lateral tread edge toward the equatorial plane, the first and second lugs extending radially outward from the inner tread surface and having an R-1W depth, wherein none of the first and second lugs cross the equatorial plane; a first inner sixth of the tread extending between the equatorial plane and a first inner circumferential reference plane on the first side disposed axially one-sixth of a tread width from the equatorial plane; a second inner sixth of the tread extending between the equatorial plane and a second inner circumferential reference plane on the second side disposed axially one-sixth of the tread width from the equatorial plane; a first middle sixth of the tread extending between the first inner circumferential reference plane and a first middle circumferential reference plane on the first side disposed axially one-sixth of the tread width from the first inner circumferential reference plane; a second middle sixth of the tread extending between the second inner circumferential reference plane and a second middle circumferential reference plane on the second side disposed axially one-sixth of the tread width from the second inner circumferential reference plane; a first outer sixth of the tread extending between the first middle circumferential reference plane and a first outer circumferential reference plane on the first side disposed axially one-sixth of the tread width from the first middle circumferential reference plane; a second outer sixth of the tread extending between the second middle circumferential reference plane and a second outer circumferential reference plane on the second side disposed axially one-sixth of the tread width from the second middle circumferential reference plane; and a net tread volume ratio of the first and second lugs is approximately 40 percent, and between 36 and 39 percent of a volume of the first and second lugs is in the first and second inner sixths of the tread, between 32 to 35 percent of the volume of the first and second lugs is in the first and second middle sixths of the tread, and 27 to 30 percent of the volume of the first and second lugs is in the first and second outer sixths of the tread. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A pneumatic agricultural tire having an equatorial plane separating a first side and a second side of the tire, comprising:
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a tread having an inner tread surface, first lugs on the first side of the tire extending from a first lateral tread edge toward the equatorial plane and second lugs on the second side of the tire extending from a second lateral tread edge toward the equatorial plane, the first and second lugs extending radially outward from the inner tread surface and having an R-1W depth, wherein none of the first and second lugs cross the equatorial plane, each of the first and second lugs including a lug nose having a leading nose edge extending in a substantially axial direction and an inner nose edge extending in a substantially circumferential direction; a first inner sixth of the tread extending between the equatorial plane and a first inner circumferential reference plane on the first side disposed axially one-sixth of a tread width from the equatorial plane;
a second inner sixth of the tread extending between the equatorial plane and a second inner circumferential reference plane on the second side disposed axially one-sixth of the tread width from the equatorial plane;a first middle sixth of the tread extending between the first inner circumferential reference plane and a first middle circumferential reference plane on the first side disposed axially one-sixth of the tread width from the first inner circumferential reference plane;
a second middle sixth of the tread extending between the second inner circumferential reference plane and a second middle circumferential reference plane on the second side disposed axially one-sixth of the tread width from the second inner circumferential reference plane;a first outer sixth of the tread extending between the first middle circumferential reference plane and a first outer circumferential reference plane on the first side disposed axially one-sixth of the tread width from the first middle circumferential reference plane; a second outer sixth of the tread extending between the second middle circumferential reference plane and a second outer circumferential reference plane on the second side disposed axially one-sixth of the tread width from the second middle circumferential reference plane; a net-to-gross volume ratio of the first and second lugs is approximately 40 percent, and between 36 and 39 percent of a volume of the first and second lugs is in the first and second inner sixths of the tread, between 32 to 35 percent of the volume of the first and second lugs is in the first and second middle sixths of the tread; and 27 to 30 percent of the volume of the first and second lugs is in the first and second outer sixths of the tread and wherein the first and second lugs are configured such that when a reduction of 50 percent of the volume of the first and second lugs under normal wear conditions occurs, the tread depth will be greater than 46 percent of the original tread depth. - View Dependent Claims (8, 9, 10, 11)
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12. A pneumatic agricultural tire having an equatorial plane separating a first side and a second side of the tire, comprising:
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a tread having an inner tread surface, first lugs on the first side of the tire extending from a first lateral tread edge toward the equatorial plane and second lugs on the second side of the tire extending from a second lateral tread edge toward the equatorial plane, the first and second lugs having an arcuate leading edge extending from one of the first and second lateral tread edge to a leading nose edge extending substantially axially from the arcuate leading edge to an inner nose edge, the inner nose edge extending substantially circumferentially from the leading nose edge to an arcuate trailing edge extending from the inner nose edge to the one of the first and second lateral tread edge, wherein none of the first and second lugs cross the equatorial plane; a first inner sixth of the tread extending between the equatorial plane and a first inner circumferential reference plane on the first side disposed axially one-sixth of a tread width from the equatorial plane; a second inner sixth of the tread extending between the equatorial plane and a second inner circumferential reference plane on the second side disposed axially one-sixth of the tread width from the equatorial plane; a first middle sixth of the tread extending between the first inner circumferential reference plane and a first middle circumferential reference plane on the first side disposed axially one-sixth of the tread width from the first inner circumferential reference plane; a second middle sixth of the tread extending between the second inner circumferential reference plane and a second middle circumferential reference plane on the second side disposed axially one-sixth of the tread width from the second inner circumferential reference plane; a first outer sixth of the tread extending between the first middle circumferential reference plane and a first outer circumferential reference plane on the first side disposed axially one-sixth of the tread width from the first middle circumferential reference plane; a second outer sixth of the tread extending between the second middle circumferential reference plane and a second outer circumferential reference plane on the second side disposed axially one-sixth of the tread width from the second middle circumferential reference plane; and a net tread volume ratio of the first and second lugs is approximately 40 percent, and between 36 and 39 percent of a volume of the first and second lugs is in the first and second inner sixths of the tread, between 32 to 35 percent of the volume of the first and second lugs is in the first and second middle sixths of the tread; and
27 to 30 percent of the volume of the first and second lugs is in the first and second outer sixths of the tread. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification