Patent ID: 7478765
Filing Date: 2009-01-20
Classification: A01M,B05B

Abstract:
1. Agricultural spray apparatus comprising: a supply of agricultural spray liquid; a spray boom on which is located a spray line having a first end and a second end and at least one spray nozzle between the two ends; a pipe-work system comprising a liquid feed line extending along the spray boom and connecting the supply of spray liquid and the at least one spray nozzle, and the pipe-work system also comprising a return line extending along the spray boom from the spray nozzle to the supply, wherein the feed line is coupled to the first end of the spray line and the return line is coupled to the second end of the spray line; and a pump for moving spray liquid from the supply to the at least one spray nozzle and for returning spray liquid from the at least one spray nozzle to the supply when the liquid is not being sprayed; wherein during spraying, spray liquid flows from the supply toward the at least one spray nozzle on the spray boom through both the liquid feed line and the return line simultaneously; and wherein during circulation spray liquid circulates from the supply, through the feed line, past the at least one spray nozzle, then through the return line.