High density concrete placing and finishing machine

Details High density concrete placing and finishing machine High density concrete placing and finishing machine

1984-02-16

1986-02-25

Leppink, James A.

Road structure, process, or apparatus

Apparatus

Means to agitate material

404119, E01C 1929

Patent

active

045727040

ABSTRACT:
The present invention levels freshly poured concrete, internally vibrates a linear segment of that concrete and then moves forward and remixes a surcharged concrete layer to yield a more uniformly dense mass of concrete. The apparatus includes a bridge spanning the width of a plastic concrete surface and is suppported above and maintained substantially parallel to the plastic concrete surface. A small diameter auger is coupled to a carriage suspended beneath the bridge and is laterally translatable back and forth along the length of the bridge within the linear segment of concrete to level the irregular concrete surface to form a flat intermediate surface. An internal vibrator module is laterally translatable along the bridge for internally vibrating the plastic concrete to densify material within the linear segment into a surcharge layer. A large diameter auger is coupled to the carriage behind the small diameter auger to engage the concrete at a level below the intermediate surface and displace the surcharge layer forward and out of the linear segment as the bridge is translated forward with respect to the linear segment.

REFERENCES:
patent: 3738763 (1973-06-01), Glesmann
patent: 4015734 (1977-04-01), Laidig
patent: 4068970 (1978-01-01), Rowe
patent: 4314773 (1982-02-01), Allen
patent: 4320987 (1982-03-01), Rowe et al.
patent: 4386695 (1983-06-01), Olson
CMI Corporation, Bidwell Brochure p. 5, Jan. 1983.

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