Laser operated automatic grade control system for concrete finishing
US5288166A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Jun 26, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C19/006
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An automatic grading control device for finishing plastic concrete controls several different elongated, multi-section concrete finishing tools such as vibratory screeds or the like, with or without forms. Supporting skis facilitate sliding, winch driven movement of the device relative to the plastic concrete. Spaced apart and vertically upwardly extending towers are supported by the skis and disposed periodically along the length of the finishing tool. Each tower comprises a pair of elongated, spaced apart stanchions disposed on opposite sides of the tool that are braced with a rigid, adjustable upper strut. The strut extends between the stanchions and forms the top of the tower. Movable sleeves coaxially fitted to the stanchions are synchronized by rigid transverse bridges that extend between the sleeves above the tool. Hydraulic or pneumatic cylinders extending between the strut and the bridge raise and lower the tool thereby controlling level. The cylinders are controlled by a beacon laser and attendant sensors secured to the device. A control panel controls both the cylinders and winches. The winches move the device along the plastic concrete by spooling cables secured to a fi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.