Apparatus for finishing flat surfaces
US4727686A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 9, 1986 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Sep 9, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B7/186
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A self-propelled grinding or milling apparatus for finishing a surface of concrete or similar hard material such as a floor, which includes a frame supported on a number of wheels. A rotating grinding or milling tool is mounted in the frame and has a vertical shaft which is suspended and loaded with weights so that the pressure of the wheels on the surface is maintained at a constant level at varying working pressures of the tool. The apparatus is arranged to tilt laterally by means of a raising and lowering device which acts on the non-steerable wheels so that the pressure of the tool on the floor differs on the right-hand and left-hand side of the apparatus and so gives rise to frictional forces which cause the apparatus to move either in the forward direction or the rearward direction at a speed which is dependent on the magnitude of the tilt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.