| 摘要 |
Mechanism operating through a mechanical advantage for rolling over a two-way gang plow comprises a pair of hydraulic cylinders acting through respective short links connected pivotally at one of their ends to their associated cylinders and at their opposite ends pivotally to spaced pivots on a bell crank lever secured to the roll-over shaft of the plow, the spacing between the bell crank lever pivots being less than the spacing between the link pivots. Annular rings surround the roll-over shaft for abutment by the links during operation of the mechanism, providing each link with a fulcrum point which is arranged to augment the output of the associated hydraulic cylinder during the initial portion of its extension.
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