B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
152/83.1
B60C 9/08 (2006.01) B60C 11/01 (2006.01)
Patent
CA 2037656
ABSTRACT OF THE DISCLOSURE A heavy duty radial tire is provided herein. The tire comprises a radial carcass having at least one ply of cords extending between bead portions through sidewall portions and a tread portion of the tire, a tread disposed radially outside the carcass, and a belt comprising at least two plies of cords disposed radially outside the carcass and inside the tread, in a state that the tire is mounted on its regular rim and inflated to its maximum pressure, the tread width between the tread edges being not less than 0.73 times the tire maximum width (W), and the tire profile between the tread edge and the tire maximum section width point being composed of a radially outer part between the tread edge and a point Q, a radially inner part between the tire maximum section width point and a point R, and a middle part between said points Q and R, said radially outer part being a circular arc swelling inwardly of the tire and having a single radius of curvature R2 and a center outside of the tire, the inner part being a circular arc swelling outwardly of the tire and having a single radius of curvature R1 and a center positioned inward of the tire on an axial straight line Xm drawn from the tire maximum section width point, said point Q located at a radial height in the range of the edge height of the widest ply of the belt plus or minus 5 mm, said point R located at a radial height defined such that Abstract of the Disclosure (page 2) the outwardly swelling circular arc of the radially inner part and the inwardly swelling circular arc of the radially outer part extended from the point Q to the point R are smoothly connected each other at the point R as the inflection point therebetween, said middle part being a straight or curved line located axially outside of the extended part of the inwardly swelling circular arc of the radially outer part so that the distance measured from a straight line N normally to this straight line N is not more than 2 mm, wherein the straight line N is extended radially inwardly from the point Q toward the point R inclining axially outwardly at an angle of 4 to 15 degrees with respect to a tangential line to the inwardly swelling circular arc at the point Q.
Borden Ladner Gervais Llp
Sumitomo Rubber Industries Limited
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