Resilient tires and wheels – Tires – resilient – Anti-skid devices
Reexamination Certificate
2011-02-01
2011-02-01
Maki, Steven D (Department: 1791)
Resilient tires and wheels
Tires, resilient
Anti-skid devices
C152S209180, C152S209250, C152S901000, C152SDIG020
Reexamination Certificate
active
07878228
ABSTRACT:
A heavy-duty tire comprises a tread portion provided with at least three circumferentially continuously extending ribs divided by at least two circumferential grooves extending straight in the tire circumferential direction, wherein the ribs have side edges adjacent to the circumferential grooves; each of the side edges is provided with edge sipes at intervals in the tire circumferential direction; each of the edge sipes extends parallel with the tire axial direction from the adjacent circumferential groove and terminates in the rib; each of the edge sipe has an axial length in a range of not less than 5% but not more than 15% of the axial width of the rib, a thickness in a range of not less than 0.3 mm but not more than 1.0 mm and a depth in a range of not less than 50% but not more than 100% of the depth of the circumferential groove; and the total number of the edge sipes per tire is in a range of from 4 to 8 times the value of the tire diameter in millimeter.
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machine translation for Japan 08-150812 (no. date).
machine translation for Japan 07-052613 (no. date).
Birch & Stewart Kolasch & Birch, LLP
Maki Steven D
Sumitomo Rubber Industries Ltd.
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