Combined harrow and harrow bar

Details Combined harrow and harrow bar Combined harrow and harrow bar

1984-03-16

1985-11-26

Johnson, Richard J.

Earth working

Diverse tools

Rolling and non-rolling

172179, 172198, 172657, A01B 4902

Patent

active

045549770

ABSTRACT:
A cultivator of the type having a vertically movable harrow bar followed by a vertically movable harrow roller. A plurality of springs biases the roller down against the ground. The springs are operatively connected to the harrow bar in a manner to have vertical movement of the bar automatically vary the pressure exerted by the roller.

REFERENCES:
patent: 772529 (1904-10-01), McCain
patent: 1867521 (1932-07-01), Mote
patent: 3991831 (1976-11-01), Foster
patent: 4204579 (1980-05-01), Rau

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