Pneumatic tire including axial grooves
US6474381B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 2000 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Aug 27, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S152/902
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pneumatic tire comprises a tread portion provided with a longitudinal main groove extending continuously in the tire circumferential direction and axial grooves each having at least one opening into the longitudinal main groove, and at least one of two groove walls of each of the axial grooves swells gradually towards the opening. The axial grooves include a groove having two openings and/or a groove having one opening and one closed end. The swelling part of the groove wall can be formed by a convexly curved surface extending from the tread surface towards the groove bottom, and having a single radius of curvature gradually decreasing towards the opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.