Road structure – process – or apparatus – Apparatus – Material distribution means
Patent
1995-12-08
1996-10-08
Buiz, Michael Powell
Road structure, process, or apparatus
Apparatus
Material distribution means
404122, 404123, 425 62, E01C 1928
Patent
active
055623611
ABSTRACT:
A triple roller tube concrete finisher that uses rotating tubes to strike-off, screed and finish concrete. The machine rides upon concrete forms and comprises a box-like, generally parallelepiped, frame supported by a plurality of rotary rollers. The frame houses an engine, cleaning system and a hydraulic system. The engine powers the hydraulic system that rotates the rollers. Two of the rollers provide locomotion to the machine while simultaneously screeding and finishing concrete the machine moves over. Preferably, these drive rollers are bidirectional to facilitate forward and rearward movement of the finishing machine. One of the rollers functions like a strike-off to prevent ride up. This roller rotates counter to the drive rollers to grade and displace excess unlevel concrete away from the leading edge of the machine. Preferably, the vertical height of the strike-off roller and its axis of rotation may be adjusted to vary the resulting depth of the concrete passing thereunder. A pivoting housing attaches the strike-off roller to the frame and permits the vertical displacement of the roller. The strike-off roller moves the excess concrete away from the frame, forming an intermediate zone. The drive rollers then compress and screed the intermediate zone to yield a finished slab of compacted concrete. A hydraulically displaceable leg depends from the frame and may be selectively actuated to lift the drive rollers off the forms. An operator controls the rollers and a steering system from a central location.
REFERENCES:
patent: 3541931 (1970-11-01), Godbersen
patent: 3797953 (1974-03-01), Lindskog
patent: 4614486 (1986-09-01), Bragagnini
patent: 5046889 (1991-09-01), Sterner, Jr.
Allen Engineering Corporation, Inc.
Buiz Michael Powell
Carver Stephen D.
Keisling Trent C.
O'Connor Pamela A.
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