Driller for use in rice field

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

1984-12-31

1986-09-30

Johnson, Richard J.

Earth working

Lawn aerator or perforator, or plug remover

172 93, 172 47, A01B 4502, A01B 3500

Patent

active

046142398

ABSTRACT:
This driller for use in a rice field comprises attaching a vertically moving supporting frame to a guide frame which is connected with a tractor and is raised and lower by a first vertically movable mechanism; connecting a first transfer mechanism mounted on the guide frame with a second transfer mechanism mounted on the supporting frame by means of an expansion and contraction rod; providing a crank driven by the second transfer mechanism as well as a vertically movable vertical rod, on the supporting frame; connecting the crank with the vertical rod by means of a connecting rod; mounting a movable frame, which is biased forwards continuously by a biasing spring and has vertical drilling rods, on horizontal guide rails disposed at the lower end of the vertical rod; and connecting both ends of a swing lever whose middle part is pivotally supported on the front part of the guide frame to the tractor and the supporting frame respectively.

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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