Grader

Details Grader Grader

1975-05-14

1976-08-24

Shapiro, Paul E.

Earth working

Scraper between front and rear ground supports of vehicle

Push frame for scrapers

172791, 172792, 172793, 172795, 172797, 280638, E02F 376

Patent

active

039761460

ABSTRACT:
A grader of the type including a longitudinal overlying boom connecting a front wheel assembly to a rear tractor unit with a blade carrier frame assembly positioned intermediate the front wheels assembly and the tractor unit. This grader is characterized by a boom which is longitudinally adjustable, laterally swingable and mounted over the cab to allow selective adjustment between a maximum effective wheelbase and a minimum turning radius to allow a lower cab and overall profile of the grader, and to provide an increased effective field of vision to the operator and to provide roll-over protection for the operator. This grader also distinctively includes a blade, the carrier frame of which is rearwardly connected to the tractor unit rather than forwardly to the boom, such as to be pushed by the tractor unit instead of being drawn by the boom, to thus allow a boom of lighter construction.

REFERENCES:
patent: 940169 (1909-11-01), Lathrop
patent: 1106104 (1914-08-01), Marx
patent: 2450905 (1948-10-01), Mork
patent: 2511692 (1950-06-01), Brown
patent: 3036392 (1962-05-01), Marvin et al.
patent: 3266180 (1966-08-01), Toland
patent: 3381760 (1968-05-01), Braud
patent: 3450213 (1969-06-01), Creighton et al.
patent: 3527315 (1970-09-01), Hampton

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