Earth working – With ground support vertically adjustable relative to frame – Tool land ground support moved together relative to frame
Patent
1979-06-26
1981-05-26
Marlo, George J.
Earth working
With ground support vertically adjustable relative to frame
Tool land ground support moved together relative to frame
172244, 172413, 172762, 172630, 1727995, A01B 6316, A01B 63111
Patent
active
042692733
ABSTRACT:
Land surfacing apparatus, comprising an elongate blade and a towing structure which includes a tow connection portion forward of the blade and which is connected to the blade so that the blade can be towed with its longitudinal dimension transverse to the tow direction while biased by its own weight into engagement with the ground with a longitudinal edge thereof serving as a soil cutting edge and a leading face extending upwardly from the cutting edge. The connection of the tow structure to the blade permits adjustment of the blade through a range of forwardly leaning orientations at which it extends both upwardly as well as forwardly in the tow direction from said cutting edge. The blade is carried by an elongated hollow triangular structure which carries ground wheels mounted on supports extending toward the towing structure, and inboard of opposite ends of the blade. A hydraulic cylinder is operable to effect pivoting of the tow structure and hollow structure and cause the ground wheels to be brought into engagement at an extreme forward leaning movement of the blade.
REFERENCES:
patent: 1193921 (1916-08-01), Pollard
patent: 1220898 (1917-03-01), Smith
patent: 1934488 (1933-11-01), Dempster et al.
patent: 2218564 (1940-10-01), Thomas
patent: 2266625 (1941-12-01), Cundiff
patent: 3640346 (1972-02-01), Fueslein
patent: 3935906 (1976-02-01), Neal et al.
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