Piston-type variable speed control device
US9689121B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2013 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Jul 6, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F9/529
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A piston-type variable-speed control device. The piston-type variable-speed control device comprises a plurality of piston-type speed bump structure apparatuses installed on a road surface, a vehicle speed detection device, a speed controller and an electrical power supply. Each of the piston-type speed bump structure apparatuses comprises a ridge platform. A height by which the ridge platform is raised, a time to raise the ridge platform, and a duration for which the ridge platform is raised are controllable to cause a jolting motion to one or more front wheels, one or more rear wheels, or a single wheel of a speeding vehicle. When the speed of a passing vehicle exceeds a predetermined speed limit, the piston-type speed bump structure apparatuses stay at moderately raised position to cause an obvious yet safe jolting motion to the passing vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.