Roadway barrier
US5813796A · kind A · utility
3Cited by
5References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1997 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Feb 25, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05F1/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A barrier for a roadway has an upright (1), a barrier arm (9) fitted on a horizontal drive spindle (2), a pivoting mechanism and a balancing spring (8) supporting the opening and closing movements of the barrier arm (9). The balancing spring (8) has an untensioned zero position (0) between the blocking position (S) and the open position (F) of the barrier arm (9).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.