High performance triple rotor riding trowel

Details High performance triple rotor riding trowel High performance triple rotor riding trowel

1997-01-10

1998-10-06

Lisehora, James

Road structure, process, or apparatus

Apparatus

Tool rotating in horizontal plane

451353, E01C 1922

Patent

active

058167390

ABSTRACT:
A high performance, three engine, three rotor riding trowel for finishing concrete. A rigid, generally triangular frame mounts three downwardly projecting, bladed rotors that frictionally engage the concrete surface therebelow. The rotors on opposite sides of the operator (i.e., to the left or right) rotate in opposite directions, and they are tilted in coincident pivot planes that are parallel with the frame rear. The front rotor is titled in a plane that is perpendicular to the pivoting plane of the other two rotors. Tilting of the rotors with double acting hydraulic cylinders effectuates steering of the apparatus. Joy sticks enable the operator to hand control the trowel with minimal physical exertion. A unique hydraulic powered linkage generates steering forces by tilting the rotors in response to electrical signals. The gearboxes are interchangeable and mounted to tiltable, steering boxes secured to the frame. Each rotor establishes a generally vertical axis of rotation. Several equidistantly spaced blades extend radially outward from each rotor. The blades contact plastic concrete to finish the surface while supporting the trowel.

REFERENCES:
patent: 3412657 (1968-11-01), Colizza et al.
patent: 3936212 (1976-02-01), Holz, Sr. et al.
patent: 4046484 (1977-09-01), Holz, Sr. et al.
patent: 5108220 (1992-04-01), Allen et al.
patent: 5480257 (1996-01-01), Allen
patent: 5480258 (1996-01-01), Allen

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