Earth working – With drive means for tool or cleaner – Plural driven tools
Patent
1982-08-15
1984-05-29
Stouffer, Richard T.
Earth working
With drive means for tool or cleaner
Plural driven tools
172116, 172587, A01B 3302
Patent
active
044509154
ABSTRACT:
A self-propelled disk harrow apparatus having four gangs of disc members attached thereto which are rotated to propel the disk harrow and to thereby till the soil. Wheels are provided for allowing the disk harrow to travel on public roads and to aid in propelling the disk harrow. When the disc members extend too far into the soil or otherwise become ineffective in propelling the disk harrow, for example when in wet or sandy soil, the weight of the disk harrow transfers to the wheels and the wheels tend to primarily propel the disk harrow. A hydraulicly controlled pitch control is provided for controlling how deeply the discs extend into the ground. An automatic coupling structure is also provided for allowing each gang of discs to be folded for extending the effective length thereof and still providing power to all of the discs on each gang. Furthermore, a rear wheel depth control is provided for varying the depth of the rearmost wheels and also the relative position of the wheels along the frame, whereby in the transport position the rearmost wheels are provided on the opposite side of the center of balance of the longitudinal frame from the frontmost wheels, and, during the operation of the disk harrow, the rearmost wheels are moved to a position substantially in alignment with the longitudinal balance point of the apparatus, whereby the apparatus is substantially balanced on the four set of disc gangs.
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