Resilient tires and wheels – Tires – resilient – With electrical conducting means
Reexamination Certificate
1999-09-30
2001-02-27
Johnstone, Adrienne C. (Department: 1733)
Resilient tires and wheels
Tires, resilient
With electrical conducting means
C152S539000
Reexamination Certificate
active
06192951
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a heavy-duty pneumatic radial tire with a transponder buried in a bead section. More specifically, the invention relates to a heavy-duty pneumatic radial tire which enables to prevent communication failures to the transponder due to radio wave interference of metallic components while preventing damage to the transponder by specifying arrangement of the transponder.
In recent years, for the purpose of performing manufacturing and shipping management of tires as well as use history management thereof after the tires have been provided to users, studies have been actively pursued on technologies for fixing a transponder with a built-in memory to a tire.
According to many of prior arts, transponders were stuck to the inner surface of tires. However, such a method resulted in not only bad appearance of the inner surface of the tire but also communication failures caused by a longer distance from an interrogator located outside of the tire for communications. It is therefore desired to bury the transponder in a wall portion of the tire.
In such a heavy-duty pneumatic radial tire, however, use of many metallic components caused communication failures to the transponder because of the influence of radio wave interference by the metallic components. Also, large deformation of the tire during the rotation in driving easily caused damage to the transponder. Thus, for burying the transponder in a wall portion of the heavy-duty pneumatic radial tire, sufficient consideration must be given to its installing method
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a heavy-duty pneumatic radial tire which enables to prevent communication failures to a transponder due to radio wave interference of metallic components while preventing damage given to the transponder.
In order to achieve the foregoing object, the heavy-duty pneumatic tire of the present invention comprises a bead filler disposed on an outer periphery of an annular bead core; a carcass layer formed by arraying a plurality of steel cords in a tire radial direction, an end part thereof being turned up from the inside of the tire to the outside around the bead core; a steel reinforcing material wrapping around the bead core with the carcass layer interposed; and a bar-shaped transponder buried in an area separated by 2 to 5 mm from metallic components of a bead section m the bead filler so as to set a longitudinal direction thereof in a tire circumferential direction, the area being closer to the bead core than a turned-up end of the carcass layer in a turned-up side of the carcass layer, and closer to the bead core than an inner wrapping end of the steel reinforcing material in a main body side of the carcass layer.
As described above, the bar-shaped transponder is installed in the bead filler by being arranged in the area separated by a specified distance from the metallic components of the tire bead section and having small deformation during the rotation in driving so as to set the longitudinal direction thereof in the tire circumferential direction. Thus, it is possible to prevent not only communication failures due to radio wave interference of the metallic components but also damage to the transponder.
REFERENCES:
patent: 4911217 (1990-03-01), Dunn et al.
patent: 5181975 (1993-01-01), Pollack et al.
Maruyama Hirokatsu
Shimura Kazuhiro
Arent Fox Kintner & Plotkin & Kahn, PLLC
Johnstone Adrienne C.
The Yokohama Rubber Co. Ltd.
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