Rotary harrows

Details Rotary harrows Rotary harrows

1977-04-05

1979-02-27

Johnson, Richard J.

Earth working

With drive means for tool or cleaner

Plural driven tools

172776, A01B 3306

Patent

active

041414209

ABSTRACT:
A rotary harrow has a row of soil working members that are rotatable about upwardly extending axes defined by shafts journalled in an elongated, hollow frame portion. The frame portion is formed by opposing U-shaped upper and lower portions that have abutting rims clamped together by releasable fastening means. Driving gears are housed, together with lubricant, within the frame portion. The lateral sides of the frame portion are closed by vertical sector plates which are attached to the lower frame portion. Inwardly projecting ribs on the plates coextend with the inner surfaces of the upper frame portion and a gasket is sandwiched between those surfaces and the ribs. A supporting roller is located to the rear of the soil working members and arms pivotably interconnect the roller to the sector plates so that adjustment can be made to regulate the working depths of the working members.

REFERENCES:
patent: 1299944 (1819-04-01), Houston
patent: 2857074 (1958-10-01), Hutterer
patent: 3841411 (1974-10-01), Lely et al.
patent: 3899030 (1975-08-01), Lely et al.
German Printed App. No. 2,162,433, 7/1972, Lely.

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