Pneumatic tire including slant main grooves and sipes

Resilient tires and wheels – Tires – resilient – Anti-skid devices

Reexamination Certificate

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Details

Other Related Categories

C152S209280, C152SDIG003

Type

Reexamination Certificate

Status

active

Patent number

06935392

Description

ABSTRACT:
A pneumatic tire according to the present invention includes a tread surface having a tire rotation direction designated in one direction. The tread surface has a straight main groove extending in a circumferential direction of the tire in the center, and lateral grooves obliquely extending in a width direction of the tire on both sides thereof, defining blocks thereon. On both sides of the straight main groove, left and right slant main grooves are arranged to cross three or more lateral grooves. Both ends of-the slant main grooves are positioned within the blocks, and the groove width thereof is gradually enlarged from both end portions toward the center portion of the slant main groove. The inclination angle of the slant main grooves relative to the tire circumferential direction is set in a range of 10 to 45°, and the maximum groove width thereof is set to 80 to 110% of the groove width of the straight main groove.

REFERENCES:
patent: 5370168 (1994-12-01), Boiocchi et al.
patent: 5375639 (1994-12-01), Suzuki et al.
patent: D388753 (1998-01-01), Brayer et al.
patent: 5785780 (1998-07-01), Ochi
patent: 6450223 (2002-09-01), Landers et al.
patent: 6691753 (2004-02-01), Hanebuth et al.
patent: 09-156320 (1997-06-01), None
patent: 10-236111 (1998-09-01), None

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