Traffic control cart
US5294138A · kind A · utility
16Cited by
7References
7Claims
0Family size
Inventor
Key dates
| Filing date | Apr 5, 1993 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Apr 5, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/0955
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A traffic control cart includes a rolling wheel assembly, a base fixed on the rolling wheels, a column mounted on the base, an arm pivotally secured on one periphery wall of the column, a light device including at least a green light, a yellow light, and a red light being mounted on a top face of the column. The arm is allowed to reciprocate in a ninety-degree range from vertical position to horizontal position, in the meanwhile one color of the traffic lights is "on" thus controlling the traffic therearound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.