Aggregate exposing machine
US4360333A · kind A · utility
5Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1981 |
| Grant date | Nov 23, 1982 |
| Priority date | — |
| Expiry date | Aug 3, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28B11/002
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A machine for removing uncured concrete from the top surface of a cast concrete slab to expose the aggregate therein to provide a decorative surface finish. The machine utilizes a pair of counter-rotating brushes to remove concrete which has been prevented from setting by use of a surface retarder, thereby exposing the aggregate to leave an attractive exposed aggregate finish. The counter-rotating brushes deposit the uncured concrete brushed from the surface of the slab onto a conveyor which carries the concrete waste to the edge of the slab for disposal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.