Tractor mounted scraper blade

Details Tractor mounted scraper blade Tractor mounted scraper blade

1976-03-04

1977-12-06

Johnson, Richard J.

Earth working

Mast type hitch

Laterally adjustable tool

91412, 91170R, 172261, A01B 59043, E02F 385

Patent

active

040611949

ABSTRACT:
A material handling assembly has a frame for attachment to the three point hitch of a tractor. A laterally swingable boom extends rearwardly from the frame and has an upright shaft at its rear end rotatable about an upright axis for suspending a reversible scraper blade whose angularity may be varied as the shaft is rotated. The blade is releasably attached to and tiltable relative to the shaft. All four functions of raising and lowering the frame, swinging the boom, varying the angularity of the blade and tilting the blade are hydraulically controlled. A special four bar linkage coupled with the shaft provides for wide blade angularity adjustment. A fluid bypass arrangement interconnects the swing and angularity functions to accommodate for excessive loads which may be encountered when the attitude of the blade is to be varied in accordance with desired grading operations.

REFERENCES:
patent: 2270943 (1942-01-01), Freundel
patent: 3033394 (1962-05-01), Kashergen
patent: 3515221 (1970-06-01), Fowler
patent: 3858663 (1975-01-01), Lurwig
patent: 3991832 (1976-11-01), Cooper

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