Earth working – Driven from or guided by stationary object – or anchored – Dragline scraper
Patent
1977-01-21
1978-10-03
Shapiro, Paul E.
Earth working
Driven from or guided by stationary object, or anchored
Dragline scraper
172450, 172681, 1042441, 111 33, 172 1, 172126, 172134, 172191, 172265, A01B 6900
Patent
active
041178890
ABSTRACT:
A row crop planter supports at least two vertical guide making blocks to form superficial trenches about four or five inches deep precisely midway between adjacent rows as they are planted. Tires with trench-riding central ridges on front wheels of a tractor powering a subsequent row crop processing implement along these rows serve to guide the tractor down the rows. Vertical guide following blocks on such a subsequent processing implement such as a cultivator, for example, find and follow exactly the previously formed trenches and so serve to guide cultivator blades to follow every minor deviation of the rows, even on hillsides causing the implement to be tilted transversely of the direction of movement of the implement down the rows. The depth of the guide trenches and the depth of penetration of the guide following blocks is determined by implement support wheels near those blocks. The guide blocks are spring mounted on vertical guide blocks support bars to pivot rearwardly to clear rocks or other obstructions and to swing back into position when such obstruction has been passed over. When one guide following block is momentarily not guided by its trench, the remaining guide block will guide the entire implement.
REFERENCES:
patent: 274962 (1883-04-01), Nutting
patent: 988284 (1911-03-01), Perkins
patent: 1053341 (1913-02-01), Adriance
patent: 2228172 (1941-01-01), Luttichau
patent: 2730030 (1956-01-01), Chambers
patent: 3128833 (1964-04-01), Johnson et al.
patent: 3402773 (1968-09-01), Jennings et al.
patent: 3437061 (1969-04-01), Wells
patent: 3998275 (1976-12-01), Eisenhardt
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