Pneumatic tire with tread including chamfer portions

Details Pneumatic tire with tread including chamfer portions Pneumatic tire with tread including chamfer portions

2008-03-25

2008-03-25

Maki, Steven D. (Department: 1791)

Resilient tires and wheels

Tires, resilient

Anti-skid devices

C152S209180, C152S209210, C152SDIG020, C152S902000, C152S903000

Reexamination Certificate

active

10534019

ABSTRACT:
A pneumatic tire having improved wet performance without sacrificing steering stability. A pair of central circumferential main grooves14and a pair of side circumferential main grooves16are arranged on a tread12, to obtain a fundamentally high level of wet performance. A plurality of central land portion row lateral grooves20is formed at both sides of a central land portion row18to be spaced away from each other substantially at a constant distance, to enhance wet performance. Central land portion row chamfer portions24are formed at obtuse angle portions of the central land portion row18. The central land portion row chamfer portions24drain water between a tread surface and a ground-contact surface into the respective central circumferential main grooves14adjacent thereto, whereby wet draining performance is enhanced. Drainage is conducted by the central land portion row chamfer portions24, so that it is unnecessary to use multiple central land portion row lateral grooves20, thus making it possible to secure land portion rigidity of the central land portion row18, and also steering stability.

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