Plastic and nonmetallic article shaping or treating: processes – Forming structural installations in situ
Patent
1980-08-25
1981-11-03
Hoag, Willard E.
Plastic and nonmetallic article shaping or treating: processes
Forming structural installations in situ
52744, 264162, 264163, 264256, 264310, 264333, 404 72, 404 96, 404112, 404118, 425 60, 425456, 425472, E02D 1502, E04G 2110
Patent
active
042985552
ABSTRACT:
A mechanized trowel including a center body of an elongated configuration supported for rotational displacement about its longitudinal axis and having a helical troweling blade extending along the surface thereof adapted to engage, spread and trowel a body of cement in its plastic state, a supporting rail extended in parallelism with the center body supporting the center body for linear displacement therealong, and a truck supporting the end of the rail for translational displacement about a further axis perpendicularly related to the longitudinal axis of the center body and passing through the end thereof opposite the truck, and reversible, electrically energizable motors connected in driving relation with the center body for imparting thereto rotational, linear and translational displacement.
REFERENCES:
patent: 3543652 (1970-12-01), Kalns
patent: 3779661 (1973-12-01), Godbersen
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