Aggregate exposing machine
AssigneeFabcon, Inc.
InventorsLonnie G. Fox, David W. Hanson, Richard C. Nash
Life of this patent
Estimating the term…
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.
Claims6
A machine for forming an exposed aggregate finish on a cured precast concrete panel, the surface of which has been treated with a retarding agent to retard the curing thereof, said machine comprising, in combination:
- a frame;
- means for introducing relative motion between said frame and the surface of said panel;
- first rotary brushing means mounted on said frame for rotation about an axis parallel to the surface of said panel and perpendicular to the axis of relative movement between said frame and the panel, said brushing means constructed and arranged to abrade and remove the uncured retarded concrete surface to leave an exposed aggregate surface;
- and
- conveying means mounted on said frame, said conveying means constructed and arranged for receiving uncured concrete material removed from the surface of said plank by said first rotary brushing means and for conveying the concrete away from the concrete panel.
Dependencies are inferred from the claim text.