United States Patent
US Patent 7557694: Vehicle tire tread depth determining system
US 7557694 · granted 2009-07-07
| Patent Number | 7557694 |
|---|---|
| Title | Vehicle tire tread depth determining system |
| Filed | 2006-07-31 |
| Granted | 2009-07-07 |
| Inventor(s) | Jeannell Graham |
| Assignee | Individual |
| CPC Classification | B60C11/00, B60C11/246, B60C11/24 |
| Number of Claims | 3 |
Claims Summary
1. A vehicle tire wear notification system for warning a driver of low tread depth on the vehicle tires, said tire wear notification system comprising:
an annular member embedded beneath an outer surface of the vehicle tire, said annular member being disposed beneath a tread layer of the vehicle tire such that said annular member is prohibited from being exposed to ambient light when the tread layer has a predetermined minimum thickness, said annular member having photo-chromatic properties such that said annular member changes color when exposed to ambient light;