Finishing machine for a concrete surface
US4848960A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1988 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Apr 5, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a finishing machine for a concrete surface comprising a body which supports a plurality of rotatable trowels with a plurality of trowel blades through radial support members so that the trowels can revolve around the central axis of the body, the body being equipped further with a driving device of the rotatable trowels, a power generator and traveling rollers of the finishing machine which is placed just below the central axis, wherein the driving device of the rotatable trowels is a gasoline engine, and wherein each rotatable trowel is driven by a transmission shaft branched off from a gearbox. The angle between the surface of revolution of each rotatable trowel and the concrete surface is minutely changeable by an angle adjustment mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.