Earth working – Mast type hitch – Including blade – scraper – or smoother
Patent
1981-05-21
1983-06-07
Johnson, Richard J.
Earth working
Mast type hitch
Including blade, scraper, or smoother
172780, A01B 4902
Patent
active
043866620
ABSTRACT:
A leveler frame is attached to the three-point linkage of an agricultural tractor and serves to break up earth clods by vibrating action of its inclined blades. The implement comprises two lateral members and three cross members in the shape of one fixed inclined blade at the rear end of the frame and two vibrating blades pivotally fastened to the lateral members, one at the front end and one in the center of the frame. The pivoted blade at the front end is rigidly connected to an upstanding lever member which serves to attach the leveler frame to the parallel upper and lower linkage arms by means of vertically spaced pivots on the lever member. The second vibratory, pivoted blade--which is not obligatory--is connected to the upstanding lever by a link extending parallel to the lateral members. During travel of the tractor across a roughly plowed field the frame is trailed behind by the freely swinging linkage arms; while the tractor wheels rise and drop alternately while passing over the uneven ground, they actuate the pivoted blade or blades by movement of the linkage arms, whereby earth clods are comminuted and the soil surface is smoothed.
REFERENCES:
patent: 1845324 (1932-02-01), Noffsinger
patent: 2346757 (1944-04-01), Horner
patent: 2428857 (1947-10-01), Smith
patent: 2994977 (1961-08-01), Shumaker
patent: 3145489 (1964-08-01), Smith
patent: 3534821 (1970-10-01), Mitchel
patent: 3889760 (1975-06-01), Manor
patent: 4236586 (1980-12-01), Shader
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