Robert C Matthias

US Patent:

20020021938, Feb 21, 2002

Filed:

May 7, 2001

Appl. No.:

09/850306

Inventors:

Robert Matthias - Orlando FL, US
James Kirkland - Apopka FL, US

Assignee:

The Concrete Edge Company - Orlando FL

International Classification:

E01C011/22
E01C019/12

US Classification:

404/098000, 404/105000

Abstract:

The curb forming and extruding machine forms continuous concrete edging while reducing and/or substantially eliminating voids, flat spots or weak areas caused by smoothed sections in the packed concrete. Also, concrete bridging in the hopper, and the associated problems, are reduced and/or eliminated. The curb forming machine includes a plunger which is driven along a path of travel including a forward position to force the curb forming material from the lower hopper section into and through the curb extrusion mold, an upward position so that the plunger extends into the upper hopper section, and a rearward position away from the curb mold and in the lower hopper section. The plunger extending into the upper section of the hopper eliminates concrete bridging and also scores the concrete as it packs it into the mold.