Asymmetric tire

US5361814A · kind A · utility

Assignee

• The Goodyear Tire & Rubber Company · US

Inventors

• Darrell E. Covert · Uniontown, US
• Paul Bryan Maxwell · Akron, US
• Frederick W. Miller · Akron, US
• Richard L. Galante · Akron, US
• Michael A. Kolowski · Mogadore, US
• William M. Hopkins · Hudson, US
• Anthony J. Scarpitti · Uniontown, US

Key dates

• Filing date: Nov 15, 1989
• Grant date: Nov 8, 1994
• Expiry date: Nov 15, 2009

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60C2011/1254
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A radial ply pneumatic tire (30) has as asymmetric tread portion (41) having circumferential grooves (50, 51, 52, 53) and diagonal grooves (55, 56) therein. The tread is divided into three axial regions (A, B, C) of equal width, and in each region the net-to-gross ratio is different. The rate of treadwear in the axially outermost regions (A, B) of the tread are substantially equalized by features including varying groove depths and widths, groove paths, and chamfering the edges of block elements (57, 58, 62, 63) of the tread.