Automatic reset plow

Details Automatic reset plow Automatic reset plow

1975-08-15

1977-08-09

Marlo, George J.

Earth working

Overload shifting

Resilient latch

172266, 172699, A01B 6104

Patent

active

040404919

ABSTRACT:
A linkage assembly supports a moldboard plow. A cam member having a seat engaging a roller is pivotally connected to the linkage assembly. A spring assembly is pivotally connected between the cam member and the linkage assembly to urge the plow in a normal plowing position. When the plow bottom encounters an object the cam seat disengages the roller and the plow rises quickly. After the obstruction is passed, the plow resets. During reset, the roller rides on a cam surface which controls the force of the spring urging the plow to reset. The locus of the plow tip when it initially strikes an object is more rearward than upward to give the unit better ability to respond at higher ground speeds. The tip of the plow is inclined downwardly during reset to facilitate rapid re-entry to proper plowing depth.

REFERENCES:
patent: 1331424 (1920-02-01), Fanberg
patent: 2756659 (1956-07-01), Lindeman
patent: 2935144 (1960-05-01), Graham
patent: 3402775 (1968-09-01), Leduc

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