Patent ID: 6969010

Claim:
A foam marking attachment device attaching to a chemical boom sprayer apparatus having a right arm and a left arm, the chemical boom sprayer apparatus mounted on a farm or garden tractor operating on a DC electrical system, said attachment marking a right or left outer boundary of a treated area of said chemical boom sprayer apparatus, comprises: a three way power switch attached to said DC electrical system of said farm or garden tractor; two air compressors attached to said three way power switch by low voltage electrical wiring; air lines having a check valve and a regulator connected to each said air compressor; a foam header attached to each said air line, said foam headers having a inlet chuck receiving compressed air from said air line into a hollow central tube; a foaming solution bottle attaching to each said foam header, said foaming solution bottle having a bottom and containing a foaming solution, with said central tube from said foam header extending to said bottom of said foaming solution bottle when said foam header is attached to said foaming solution bottle, the compressed air passing through said foaming solution creating a foam within said foaming solution bottle within a headspace above said foaming solution; an outlet chuck on each said foam header integrating with said headspace providing an outlet for said foam; a foam tubing attached to each said outlet chuck, one said foam tubing attached to said right arm of said boom sprayer apparatus and the other said foam tubing attached to said left arm of said boom sprayer; and a vertical drop tube connecting to each said foam tube from which said foam is dispensed, said vertical drop tube extending below said boom sprayer above said treated area, wherein the three way switch allows for application of the foam to be dispensed to either said right or left outer boundary by activating one of said two air compressors which generates and delivers foam to said corresponding drop tube attached to the right arm or left arm of said boom sprayer apparatus.