Lifting pole apparatus for traffic control
US7367746B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2005 |
| Grant date | May 6, 2008 |
| Priority date | — |
| Expiry date | Aug 9, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F13/046
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
There is provided a lifting pole apparatus which can lift and lower a pole having such strength as to be capable of preventing cars from entering. The lifting pole apparatus comprises a cylindrical pole which is capable of lifting and lowering inside a housing case; a screw shaft hanging from a top portion of the pole inwardly; a stay disposed upright on a bottom portion of the housing case, and housed in the pole; a driving gear rotatably supported on the stay, and having a screw portion on a through hole disposed at a center axis thereof, the screw portion being threadably mounted on the screw shaft; at least two motors disposed on the stay for rotating the driving gear; and an electro-magnetic brake disposed on the stay for activating the brake on the rotation of the driving gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.