Resilient tires and wheels – Tires – resilient – Anti-skid devices
Reexamination Certificate
2007-10-16
2007-10-16
Maki, Steven D. (Department: 1733)
Resilient tires and wheels
Tires, resilient
Anti-skid devices
C152S209160, C152S902000
Reexamination Certificate
active
10476703
ABSTRACT:
To provide a pneumatic tire in which noise can be reduced without changing the basic design of the block pattern, a chamfered portion24is provided at a tire widthwise-direction outer side end18A of a leading edge18A of a block18. When the tire rolls and the block18contacts a road surface, first, with respect to the leading edge18A, a flat portion22contacts the ground, and then the chamfered portion24contacts the ground. Because the height of the chamfered portion24gradually decreases towards the tire widthwise-direction outer side end, the leading edge18A at the chamfered portion24gradually makes contact with the road surface, whereby force input that generates sound is dispersed in terms of input timing and it is possible to suppress the generation of noise (mainly a striking sound) at the initial state of the block18contacting the road surface. Furthermore, by changing the tire widthwise-direction position of the flat portion22in a tire circumferential direction, it is possible for the entire block to gently receive stress generated at the time of rolling, whereby it is possible to suppress the level of noise generated by the block18at the time the block18contacts the ground at a low level.
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Bridgestone Corproation
Maki Steven D.
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