Portable grade averaging apparatus

Details Portable grade averaging apparatus Portable grade averaging apparatus

1978-03-16

1979-02-20

Byers, Jr., Nile C.

Road structure, process, or apparatus

Apparatus

Automatic control

37108R, 37DIG1, 172 45, 180 95, 180 41, 280 61, 299 56, 299 1, E01C 1900

Patent

active

041404203

ABSTRACT:
A portable grade averaging apparatus comprising an averaging bar assembly that serves as an elevation control reference for a track supported road working machine, one end of the averaging bar assembly being pivotally supported by a forward walking beam and the other end of the averaging bar being pivotally supported by a rear track assembly that serves as a track walking beam. A grade sensor assembly supported on one side by the road working machine contactingly engages the averaging bar assembly for directing the elevation of one side of the road working machine to establish the elevation of a working tool supported by the road working machine. A lifting bracket supported by the road working machine serves to lift the grade averaging apparatus into a grade clearing position while the machine is being maneuvered into a cutting position.

REFERENCES:
patent: 3111070 (1963-11-01), Pollitz
patent: 3272099 (1966-09-01), Drake
patent: 3323427 (1967-06-01), Schrimper
patent: 3595144 (1971-07-01), Rink
patent: 3771892 (1973-11-01), Munyon
patent: 3807887 (1974-04-01), Tate
patent: 3811787 (1974-05-01), Beaty
patent: 3846035 (1974-11-01), Davin
patent: 3879149 (1975-04-01), Smith
patent: 4029165 (1977-06-01), Miller
patent: 4041623 (1977-08-01), Miller

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