Concrete leveling machine
US5129803A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1989 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | May 23, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F21/245
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A concrete leveling machine is provided which propels itself over the surface of laid concrete and by use of rotating augers or oscillating stabilizers and a temper, levels and finishes the surface to a prescribed level and condition. A laser reference beam transmitted over the surface is detected by detectors attached to the leveling section of the machine and deviation of the level of the detectors from a reference level is adjusted so that the leveling section is also brought to a level required to produce the desired surface level. The machine is turned by a turntable integral with the main body which lifts the machine allowing it to turn by differential drive to its drive wheels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.