Earth working – Automatic power control – Land leveller type
Patent
1980-07-02
1981-11-10
Stouffer, Richard T.
Earth working
Automatic power control
Land leveller type
1724451, 172448, 172449, E02F 376, E02F 385
Patent
active
042992907
ABSTRACT:
A mobile grading machine and method with a scraper structure including a grading blade supported by caster wheels trailing therebehind. A trailing connection is disposed between the scraper structure and the caster wheels in fixed lateral relation relative to the ends of the blade. A fixed towing connection is carried at a leading portion of the scraper adapted to be coupled to a towing assembly of a tractor in a manner so as to support the grading structure for terrain following movement. A laser sensor or receiver is carried by the grading machine for raising and lowering the grading blade as the receiver falls and rises in traveling across a field. The grading blade and receiver are sufficiently closely spaced longitudinally so as to cause the receiver to detect a change in the surface of the terrain substantially coincident with the arrival of the blade at the detected change.
REFERENCES:
patent: 2732640 (1956-01-01), Kirchner
patent: 2787066 (1957-04-01), Johnson
patent: 3032902 (1962-05-01), Shumaker
patent: 3090141 (1963-05-01), Shumaker
patent: 3234669 (1966-02-01), Kachnik et al.
patent: 3353288 (1967-11-01), Waterson
patent: 3559746 (1971-02-01), Couser
patent: 3887012 (1975-06-01), Scholl et al.
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