BOOM FLOW CONTROL MECHANISM FOR PNEUMATIC SPREADERS

摘要

BOOM FLOW CONTROL MECHANISM FOR PNEUNMATIC SPREADERS An improved system for pneumatic spreader systems for selective distribution of particulate material onto agricultural fields from selected ones of a plurality of elongated delivery tubes or booms. The improved feature of the present invention comprises a means to interrupt flow of particulate material from certain preselected booms without clogging the system. The system includes a means for substantially completely blocking the flow cross-sectional area from a preselected one or plurality of delivery tubes, along with a line which normally functions as a feed line when the system is in normal operation, but as a recycling line when the delivery tube is in blocked or shut-off disposition. The arrangement provides a means for converting a twin-boom arrangement to a single-boom arrangement for accommodating unusual operation such as less-than-a-full boom width when undertaking the final run of a field application.