Pneumatic tire with tread having sub grooves in blocks,...

Details Pneumatic tire with tread having sub grooves in blocks,... Pneumatic tire with tread having sub grooves in blocks,...

2011-06-14

2011-06-14

Maki, Steven D (Department: 1747)

Resilient tires and wheels

Tires, resilient

Anti-skid devices

C152S209270, C152S209280, C152SDIG020

Reexamination Certificate

active

07958921

ABSTRACT:
A pneumatic tire having a designated rotational direction is disclosed, wherein an entire area having a width 85% of a total tire width and a center area having a width 30% of the total tire width are defined in a tread portion. A center main groove is positioned on a tire equatorial line and extends in a tire circumferential direction. Subsidiary main grooves are positioned on two sides of the center main groove and extend in the tire circumferential direction. Angled and lateral grooves extend at an angle, in a direction opposite the rotational direction towards an outside in the tire width direction. Lateral grooves extend from each subsidiary main groove. Sub grooves extend from the lateral grooves towards the rotational direction. A total length of a block edge in the center area is from 40% to 60% of a total length of a block edge in the entire area.

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patent: WO 2010/005057 (2010-01-01), None
Machine translation for Japan 2007-186053 (no date).
Machine translation for Japan 11-091317 (no.date).

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