초록 ▼

The invention relates to the use of longitudinally extending reinforcing cords associated with the pneumatic tire to control radial force variations in the tire under loaded conditions, and the method for applying such longitudinal reinforcing cords to the tire either in its new form, or as a retrea

The invention relates to the use of longitudinally extending reinforcing cords associated with the pneumatic tire to control radial force variations in the tire under loaded conditions, and the method for applying such longitudinal reinforcing cords to the tire either in its new form, or as a retreaded tire from an old carcass. Basically, the longitudinal cords are made from a very high strength cord material having a tensile strength of approximately 125 pounds each, with the cords spaced at approximately ½-inch spacings. The cords could be increased to 150 or more pounds each. There will be between about 8 to about 20 cords, depending upon the width of the tread area of the tire involved. This type of construction serves as an extra belt of many hundred pounds tensile strength, thereby controlling radial force variations in the tires, and is particularly applicable to controlling these forces in radial tires.

대표청구항 ▼

A pneumatic tire having a tread layer having a tread design, a carcass, a strip of siping material positioned in the tread layer over the full circumference thereof and at a depth about equal to the depth of the tread design and across a substantial width of the tread, which is characterized by the

A pneumatic tire having a tread layer having a tread design, a carcass, a strip of siping material positioned in the tread layer over the full circumference thereof and at a depth about equal to the depth of the tread design and across a substantial width of the tread, which is characterized by the siping material including longitudinally extending cords which extend in longitudinal, substantially parallel relationship around the full circumference of the tire, said cords having great tensile strength, and being subject to minimum elongation within their designed tensile strength, said cords acting in conjunction with the tread layer to form a belt ply to reduce radial force variations in the tire under operating conditions, wherein the longitudinal cords have a tensile strength of between about 75 to about 150 pounds, and there are between about 8 to about 20 cords across the width of the tread.