Driller for use in rice field

Details Driller for use in rice field Driller for use in rice field

1984-04-30

1986-02-11

Johnson, Richard J.

Earth working

Lawn aerator or perforator, or plug remover

172101, 111 89, A01B 4502

Patent

active

045694001

ABSTRACT:
This driller for use in a rice field comprises attaching vertical rods, with freedom of up and down, to a main frame connected to a tractor; attaching, to the main frame, an up and down mechanism which is driven by a driving source mounted on the tractor to ascend and descend vertical rods; providing guide rails, which were provided horizontally at the lower ends of vertical rods, with supporting frames movable horizontally along the guide rails; interposing a tension spring between the supporting frames and guide rails, the spring which acts to bias the supporting frame forward; and providing the supporting frame with perpendicular drilling rods.

REFERENCES:
patent: 270994 (1883-01-01), Springer
patent: 1871529 (1932-08-01), Karshner
patent: 2063333 (1936-12-01), Nolte
patent: 2223559 (1940-12-01), Fleming
patent: 2800066 (1957-07-01), Cohrs
patent: 3986562 (1976-10-01), Killion

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