All season type tire tread
US5088536A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | May 10, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S152/903
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An all season type tire tread (11) comprises a plurality of laterally extending grooves (36) having curved portions adjacent to each lateral edge (TE1, TE2) of the tread, said curved portions extending in circumferentially opposite directions. Axially spaced zig-zag shaped grooves (4-8) extend circumferentially around the tread, every fourth leg of a zig-zag groove being coincident with a portion of a laterally extending groove (36). Two legs adjacent to said fourth leg connect the laterally extending grooves to short semi-blind grooves (19) having their central portion coincident with every other fourth leg of the zig-zag shaped groove. The various grooves cooperate to define block elements (20-25), arranged in circumferential rows (30-35) and having the shape of an "S" or of a "Z". The blocks can include a plurality of slots (50-53) and humps (29) can be located between neighboring blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.