Freezing weather indicator and method
US6302054A · kind A · utility
6Cited by
7References
13Claims
0Family size
Inventor
Key dates
| Filing date | Sep 29, 2000 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Sep 29, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F9/40
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device for indicating freezing weather conditions is easily installed beside a road or highway for signaling motorists. The device includes a fluid container having a spherical visual indicator attached thereto. As the temperature drops the contained liquid freezes, urging the spherical indicator from a hidden to an exposed posture. The motorists, seeing the brightly colored ball, realize that freezing conditions exists and will thereafter drive in a more precautionary manner for accident prevention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.