Grade leveling device

Details Grade leveling device Grade leveling device

1986-02-21

1987-11-17

Johnson, Richard J.

Earth working

Tool, standard or connection

Frame-supported blade, scraper, or smoother drawn by vehicle

404114, 414722, E02F 3815, E01C 1922

Patent

active

047067624

ABSTRACT:
A device for grade leveling having a lower member with a flat bottom surface terminating in an upwardly-beveled leading edge, upright members secured above the lower member, and first and second pivot-mounts on the uprights. One of said first and second pivot-mounts defines a fixed pivot axis on the uprights and the other defines a pivot location which is variable along an arc centered around said fixed pivot axis.

REFERENCES:
patent: 1200113 (1916-10-01), Hunter
patent: 1428973 (1922-09-01), Northon
patent: 2357849 (1944-09-01), Ray
patent: 3217431 (1965-11-01), Heinzroth
patent: 3427937 (1969-02-01), Tope
patent: 3656557 (1972-04-01), Eskelson
patent: 3909149 (1975-09-01), Century
patent: 4230435 (1980-10-01), Azevedo
patent: 4441266 (1984-04-01), Westimayer

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