公开(公告)号：US20180243786A1

公开(公告)日：2018-08-30

申请号：US15883719

申请日：2018-01-30

Applicant: Triest Ag Group, Incl.

Inventor： Jonathan Cory Spence

IPC: B05C11/10

CPC classification number: B05C11/1039 ,  A01M13/00 ,  A01M17/002

Abstract: A vacuum shut off valve mechanism for a soil fumigant applicator includes a pneumatic cylinder that is operably connected to respective fumigant dispensing tubes and shanks of the applicator through a flow divider. A pair of switch operated valves respectively control the flow of fumigant to the flow divider and operation of the pneumatic cylinder. In a first switch state a first valve is opened to deliver fumigant to the flow divider and a second valve operates the pneumatic cylinder to pressurize the flow divider and allow delivery of the fumigant to the dispensing shanks. In a second state, the first valve is closed and the second valve operates the pneumatic cylinder to draw a vacuum, which restricts dripping and leaking of residual fumigant from the tubes and dispensing shanks.