Pneumatic tire including zig-zag subgrooves

Details Pneumatic tire including zig-zag subgrooves Pneumatic tire including zig-zag subgrooves

1996-05-22

1998-12-15

Maki, Steven D.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152209D, 152DIG3, B60C 1103, B60C 1112, B60C11500

Patent

active

058491198

ABSTRACT:
Two or three main grooves, which extend in the circumferential direction of a tire, are provided in the central ground contacting region alone of a tread surface of the tire the rotational direction of which is designated to one direction, and at least one rib extending in the circumferential direction of the tire is formed between the main grooves. A plurality of sub-grooves respectively extending from the both sides of the main grooves outward in the widthwise direction of the tire up to at least the ground contacting ends of the tire are arranged at a predetermined pitch in the circumferential direction of the tire in such a manner that the sub-grooves formed in zigzag lines are inclined with the inner end portions thereof positioned on the forward side with respect to the rotational direction of the tire. The sub-grooves do not communicate with the main grooves but communicate with land portions separated by the sub-grooves. This enables pattern noise to be reduced without spoiling the drainage performance.

REFERENCES:
patent: D324840 (1992-03-01), Maxwell et al.
patent: D328582 (1992-08-01), Covert et al.
patent: D365071 (1995-12-01), Hamamoto et al.
patent: 2551238 (1951-05-01), Bohannon et al.
patent: 4057089 (1977-11-01), Johannsen
patent: 4726407 (1988-02-01), Hayakawa et al.
patent: 4832299 (1989-05-01), Matsumoto et al.
patent: 5370168 (1994-12-01), Boiocchi et al.
patent: 5423364 (1995-06-01), Himuro

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