Road structure – process – or apparatus – Apparatus – Screed or drag
Patent
1980-08-26
1982-03-23
Byers, Jr., Nile C.
Road structure, process, or apparatus
Apparatus
Screed or drag
172393, E01C 1922
Patent
active
043209882
ABSTRACT:
A spreader/grader is attachable to a three-point hitch associated with a tractor and includes a pair of curved cutting blades which are adjustable so as to control cutting depth. The cutting blades are mounted between a pair of side runners and include curved cutting edges to facilitate spreading or grading operations. The positioning of the blades is variable both with respect to cutting depth and to angular orientation with the surface being graded through the use of hydraulic ram adjustment mechanisms provided at respective ends of the blades. Both blades may be attached to the spreader/grader so as to present cutting edges directed in the same direction and their respective cutting depths may be varied from each other through the use of the hydraulic ram adjustment mechanisms, or alternatively, one or both of the blades may be positioned with their cutting edges reversely directed from the direction of forward movement of the pulling tractor so as to provide a grading or feathering operation.
REFERENCES:
patent: 1068155 (1913-07-01), Mosher
patent: 1303415 (1919-05-01), Thurston
patent: 1368585 (1921-02-01), Vigil
patent: 1487723 (1924-03-01), Corbitt
patent: 1851064 (1932-03-01), Reifschneider
patent: 2192254 (1940-03-01), Beadle
patent: 2994142 (1961-08-01), Newell
patent: 3015258 (1962-01-01), Apel
patent: 3373799 (1968-04-01), Conley
patent: 3901618 (1975-08-01), Sant'Agata
Byers Jr. Nile C.
Jacobson Harvey B.
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