Resilient tires and wheels – Tires – resilient – Anti-skid devices
Reexamination Certificate
2006-07-18
2006-07-18
Maki, Steven D. (Department: 1733)
Resilient tires and wheels
Tires, resilient
Anti-skid devices
C152S209210, C152S209230, C152S902000, C152SDIG020
Reexamination Certificate
active
07077180
ABSTRACT:
Disclosed is a pneumatic tire provided with multiple blocks6on a tread1. A sipe7provided on the block6is formed by shifting pitches of a zigzag shape7aon a tread face1aside of the sipe and a zigzag shape7bon a bottom side thereof in the width direction of the tire, and by connecting concave and convex flexion points a, a′, b and b′ on the both of the zigzag shapes with edge lines x1,x2and x3.The block6is sectioned by the sipe7into a concavo-convex face A in which convex triangular pyramids Aa and convex reverse triangular pyramids Ab are alternately arranged, and a concavo-convex face B in which concave triangular pyramids Ba and concave reverse triangular pyramids Bb are alternately arranged. The concavo-convex faces A sectioned by the sipes are at least disposed in both outermost positions in the circumferential direction of the block in a manner that the concavo-convex faces A are oriented outward from the block.
REFERENCES:
patent: 4566514 (1986-01-01), Mauk et al.
patent: 6427737 (2002-08-01), Katayama
patent: 6719024 (2004-04-01), Kuze
patent: 2002/0053383 (2002-05-01), Kleinhoff et al.
patent: 6-48123 (1994-02-01), None
Maki Steven D.
Rader & Fishman & Grauer, PLLC
The Yokohama Rubber Co. Ltd.
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