Pneumatic tire with pair of grooves

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

Patent

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Details

152454, B60C 1104

Patent

active

056433735

ABSTRACT:
A pneumatic tire having an improved tread profile capable of improving wet grip and running noise without sacrificing dry grip. The tread portion is provided with a pair of circumferential grooves to divide the tread portion into a central portion and a pair of shoulder portions. The contour of the central portion comprises a central face defined by a convex curve and a pair of side faces each defined by a concave curve. Each of the side faces extends axially outwardly and radially inwardly from each axial edges of the central face towards the bottom of the adjacent circumferential groove. The side faces intersects the central face to form an angle of less than 180 degrees. In a standard condition in which the tire is mounted on a standard rim, and inflated to 70% of the maximum air pressure, and loaded with 70% of the maximum load, the ground contacting width of the central portion is not greater than the axial width between the axial edges of the central face.

REFERENCES:
patent: 4722378 (1988-02-01), Carolla et al.
patent: 5327952 (1994-07-01), Glover et al.
patent: 5337815 (1994-08-01), Graas
patent: 5435365 (1995-07-01), Tanaka
Boltze et al, New Ways To Combat Hydroplaning: Developing The Aquacontact, May 19-22, 1992.

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