Importance

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Abstract

A primary drive line for delivering power from a power-take-off (pto) shaft on a tractor to an input shaft on an implement includes a swivel hitch comprised of an upper gearbox and a lower gearbox. The upper gearbox is fastened to a pair of spaced apart, upper vertical plates carried on a tongue extending forwardly from the implement, and the lower gearbox is fastened to a pair of spaced apart, lower vertical plates carried by a yoke assembly that is attached to the tractor. An output shaft on the upper gearbox is coupled to the implement input shaft. The lower gearbox has two input/output shafts, one of which is coupled to an input shaft on the upper gearbox. The other input/output shaft on the lower gearbox is connected to the tractor pto shaft. When changing tractor pto speeds (i.e. from 540 rpm to 1000 rpm), the lower gearbox is unfastened from the lower vertical plates, reoriented, and refastened to the lower vertical plates so that its input/output shaft that had been coupled to the upper gearbox input shaft is connected to the tractor pto shaft while the input/output shaft that had been connected to the tractor pto shaft is coupled to the upper gearbox input shaft.

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First Claim