Pneumatic tire having circumferential grooves and oblique...

Details Pneumatic tire having circumferential grooves and oblique... Pneumatic tire having circumferential grooves and oblique...

2005-11-23

2009-10-27

Maki, Steven D (Department: 1791)

Resilient tires and wheels

Tires, resilient

Anti-skid devices

C152S209270, C152S209280

Reexamination Certificate

active

07607464

ABSTRACT:
A pneumatic tire is provided with a pair of circumferential grooves (3) arranged in both sides of a tire equator (C), and a plurality of oblique grooves (4) having a steep decline portion (4a) extending to an outer side in a tire axial direction at an angle (q1) between 15 and 45 degree with respect to a tire circumferential direction from a position near the circumferential groove (3), in a tread surface (2). A land portion (B) surrounded by the circumferential groove (3) and the steep decline portion (4a) has an acute corner portion (12) and an obtuse corner portion (13), each being formed between the circumferential groove (3) and the steep decline portion (4a). An outer groove wall surface (6) of the circumferential groove (3) includes a gentle decline wall (6a) in the tread surface side, and a steep decline wall (6b) in the groove bottom side.

REFERENCES:
patent: 4114671 (1978-09-01), Maiocchi et al.
patent: 6371180 (2002-04-01), Hayashi
patent: 6488064 (2002-12-01), Radulescu
patent: 2005/0076985 (2005-04-01), Colombo et al.
patent: 2005/0092413 (2005-05-01), Miyazaki
patent: 2006/0137791 (2006-06-01), Miyabe et al.
patent: 2007/0006955 (2007-01-01), Fukunaga
patent: 06-199109 (1994-07-01), None
patent: 07-076205 (1995-03-01), None
patent: 09-011708 (1997-01-01), None
patent: 10-024705 (1998-01-01), None
patent: 2003-146024 (2003-05-01), None
patent: 2004-210189 (2004-07-01), None
patent: WO 02/078982 (2002-10-01), None

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