Security gate
US4576509A · kind A · utility
23Cited by
12References
8Claims
0Family size
Inventor
Key dates
| Filing date | Sep 17, 1984 |
| Grant date | Mar 18, 1986 |
| Priority date | — |
| Expiry date | Sep 17, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41H11/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A crash resistant vehicle barrier that can be opened to pass traffic and closed to bar traffic even if the vehicle crashes into the barrier. The barrier is pivotable about a horizontal axis in the roadway into and out of a pit below the roadway. The barrier includes a counterweight for ease of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.