Earth working – Rolling – rotating or orbitally moving tool – With spring means other than for detent
Patent
1983-05-02
1985-05-07
Johnson, Richard J.
Earth working
Rolling, rotating or orbitally moving tool
With spring means other than for detent
172574, 111 87, A01C 506, A01B 3528
Patent
active
045152241
ABSTRACT:
A seed drill apparatus comprising at least two complementary rotatable seed discs journalled in tandem relation whereby one of the discs is a leading disc and the other of the discs is a trailing disc. The plane of each disc is canted with respect to the direction of travel for the apparatus, with the plane of the leading disc being of an orientation opposed with respect to the orientation of the plane of the trailing disc. The canted position of the seed discs creates a combined plowing and grooving action for the disc as the apparatus moves over the surface of the ground, thus opening and widening an efficient seed receiving groove in the ground regardless of whether or not the ground has been prepared by plowing, or the like.
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patent: 2422409 (1947-06-01), Greenroyd
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patent: 3705560 (1972-12-01), Lappin
patent: 4214537 (1980-07-01), Bailey
patent: 4289081 (1981-09-01), Koronka
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