Trailing agricultural sprayer - has pump drive from landwheel via variable speed device or tractor p.t.o

摘要

The sprayer is hauled behind the tractor, and between the side shaft driven by one or more of the landwheels and the pump input shaft are a variable-speed device and a freewheel. The input shaft can be coupled directly to the power take-off of the tractor to which the sprayer is hitched, typically by means of a dog cluth. The drive from the landwheel can pass successively through a speed increasing gear, the variable-speed unit, a reduction gear and the freewheel. The design allows spraying at a rate remaining constant in relation to unit of area, while enabling the pump to be run faster whenever desired, e.g. when refilling.