Dual rotary trowel

Details Dual rotary trowel Dual rotary trowel

1986-08-28

1987-06-30

Leppink, James A.

Road structure, process, or apparatus

Apparatus

Tool rotating in horizontal plane

E01C 1922

Patent

active

046766910

ABSTRACT:
A concrete troweling machine is illustrated as having two sets of troweling blades with a mechanism for setting the tilt of individual blades in a rotor assembly and a separate mechanism controlled by the handle position for progressively changing the tilt of individual blades during each rotation of each set of blades to generate blade reactive forces for propelling the machine in selected direction.

REFERENCES:
patent: 2277389 (1942-03-01), Conway
patent: 2351278 (1944-06-01), Matthews
patent: 2826971 (1958-03-01), Stevens
patent: 2826972 (1958-03-01), Stevens
patent: 2887934 (1959-05-01), Whiteman
patent: 2888863 (1959-06-01), Eisenbeis
patent: 3062107 (1962-11-01), Mitchell
patent: 3412657 (1968-11-01), Colizza et al.
patent: 3936212 (1976-02-01), Holz, Sr. et al.
patent: 4046484 (1977-09-01), Holz et al.
patent: 4312603 (1982-01-01), Whiteman, Jr.
patent: 4320986 (1982-03-01), Morrison

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