Earth working – With drive means for tool or cleaner – Plural driven tools
Patent
1977-12-27
1980-02-12
Johnson, Richard J.
Earth working
With drive means for tool or cleaner
Plural driven tools
172 61, 74143, A01B 3306
Patent
active
041879155
ABSTRACT:
An implement mounts a row of rotatable members, having resilient tines, that are rotatable about upwardly extending shafts. The members are driven to rotate intermittently by eccentric mechanisms that reciprocate connectors back and forth, the connectors being coupled to pawls that engage ratchet wheels on the shafts. Non-return pawls prevent the shafts from turning in reverse direction. Preferably, there are at least four tined members mounted in a row on an elongated hollow frame portion and the input shaft mounts two eccentric mechanisms that are located centrally of the frame portion, each mechanism being connected to operate two of the tined members, out-of-phase, so that neighboring members are turned periodically in relative opposite directions. The frame portion is pivoted to a forward coupling member at several points, one of which is a shear pin that allows the frame portion to tilt upon overload of a tined member. Soil is progressively loosened by the intermittent driving operation of the tines and smearing of the soil avoided.
REFERENCES:
patent: 1407647 (1922-02-01), Elledge
patent: 2713816 (1955-07-01), Berg
patent: 3949813 (1976-04-01), Lely
patent: 3962925 (1976-06-01), Olson
patent: 3985184 (1976-10-01), Lely
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