Apparatus for screening and trowelling concrete

Details Apparatus for screening and trowelling concrete Apparatus for screening and trowelling concrete

1989-08-18

1991-08-13

Novosad, Stephen J.

Road structure, process, or apparatus

Apparatus

Automatic control

404114, 404118, E01C 1930, E01C 1942, E01C 2307

Patent

active

050392492

ABSTRACT:
Disclosed is an apparatus for screeding or trowelling concrete or similar materials. The apparatus has a turret, mounted on a mobile frame. A telescopic boom is mounted in cantilevered fashion on the turret. A machine head, mounted on the distal end of the boom, is rotatable about a vertical axis. An attachment, such as a screed or a trowel, is attached to the machine head. The level and angle of the frame can be set to a selected elevation relative to a rotating laser beam by raising or lowering three hydraulic legs. The machine head can raise or lower the attachment to set the attachment at a selected elevation.

REFERENCES:
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patent: 3406761 (1968-10-01), Ryan
patent: 3595144 (1968-08-01), Rink
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patent: 3953145 (1975-03-01), Teach
patent: 4057117 (1977-11-01), Bermingham
patent: 4371287 (1980-06-01), Johansson
patent: 4403889 (1981-06-01), Gillotti
patent: 4655633 (1985-09-01), Somero et al.
patent: 4752156 (1988-06-01), Owens
patent: 4795332 (1989-01-01), Davis

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