Measuring and testing – Tire – tread or roadway
Reexamination Certificate
2005-06-02
2009-06-16
Thompson, Jewel (Department: 2855)
Measuring and testing
Tire, tread or roadway
Reexamination Certificate
active
07546764
ABSTRACT:
The dynamic state amount of a tire when a load is applied to the tire while running can be estimated accurately and stably by installing tire deformation amount measuring means11A and11B at axisymmetrical positions which are equally distant in the axial direction from the center in the axial direction of the tire on the cross-section in the radial direction of the tire on the inner side of the belt portion of a tire tread in the radial direction, such as at the inner surface of the tread, between an inner liner and a ply, between plies or between a ply and a belt to measure the waveforms of deformation of the tire, detecting the contact time which is the time difference between contact edges from the waveforms of deformation, calculating contact length indices kAand kBfrom the contact time and the wheel speed detected by a wheel speed sensor15, calculating the average value k of the above indices kAand kB, and obtaining a load applied to the tire by using the calculated average value k of the indices of contact length and a map18M showing the relationship between the average value of the indices of contact length and load pre-stored in memory means18.
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Kobayakawa Akira
Morinaga Hiroshi
Wakao Yasumichi
Kabushiki Kaisha Bridgestone
Sughrue & Mion, PLLC
Thompson Jewel
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