Earth working – Diverse tools – Including vertical – longitudinally oriented disc or blade
Patent
1976-02-13
1977-11-15
Stouffer, Richard T.
Earth working
Diverse tools
Including vertical, longitudinally oriented disc or blade
172203, 172265, 172269, A01B 4902
Patent
active
040581691
ABSTRACT:
A plow/harrow combination comprising a harrow member extending sidewardly from a plow blade, the harrow teeth having an elongated cross section with the cross-sectional length axis inclined in relationship to the direction of travel, thus creating a compensating force on the plow blade, the combination also including a release and reset mechanism, which, when the harrow member is obstructed by an object creating a load exceeding a predetermined level, causes the release of the harrow member from the original position and a pivoting movement of same in a substantially horizontal plane, the harrow member being automatically returned to the original position as soon as the load on the harrow member no longer exceeds the predetermined load.
REFERENCES:
patent: 292272 (1884-01-01), Wood
patent: 453108 (1891-05-01), Creighton et al.
patent: 604274 (1898-05-01), Sperry
patent: 1076520 (1913-10-01), Rohrer
patent: 1581395 (1926-04-01), Danskin
patent: 1587081 (1926-06-01), Martinson
patent: 2568572 (1951-09-01), Van Zee
patent: 3574320 (1971-04-01), Sigmund
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