Earth working – With drive means for tool or cleaner – Plural driven tools
Patent
1976-05-28
1978-11-07
Johnson, Richard J.
Earth working
With drive means for tool or cleaner
Plural driven tools
308178, 74608, A01B 3306
Patent
active
041240782
ABSTRACT:
A rotary harrow or cultivator has a frame including an elongated frame portion that supports a row of soil working members. Each soil working member has a substantially vertical shaft supported on the frame portion by upper and lower bearing connections. The shafts each have a pinion gear in mesh with neighboring pinion gears and these gears are housed within the frame portion between the upper and lower bearing connections. If the upper bearing fractures, the fragments thereof are retained by a protective member which can be a separate plastic annular member having a chamber that surrounds each shaft, or the bearing connection can be formed by two separable portions that are bolted together and secured in a top cover of the frame portion. In either case, the bearing fragments are retained and cannot become lodged between the meshed gears. The frame portion can be linked to the remainder of the frame by parallelogram links that interconnect rigid supports on the forward frame portion to horizontal beams of the frame. A supporting roller at the rear of the frame portion is connected to the beams by arms that can be set to support the frame at chosen vertical heights above the ground. The frame portion with soil working members can "float" through the linkage connections to accommodate ground irregularities. The rear of the frame portion is supported on the frame by compression spring-bracket connections to a rear horizontal beam of the frame.
REFERENCES:
patent: 2156739 (1939-05-01), Schmitter
patent: 3586404 (1968-06-01), Zahn
patent: 3628837 (1971-12-01), Otto
patent: 3971445 (1976-07-01), Lely
Bom Cornelis J. G.
van der Lely Ary
van der Lely Cornelis
C. van der Lely N.V.
Johnson Richard J.
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