Folding spray boom

In combination, a mobile chassis, a liquid tank mounted on said chassis and having opposite ends, an upstanding outlet pipe for said tank having upper and lower sections, first means mounting said lower section from said chassis outwardly of one end thereof, second means removably and sealingly coupling and supporting the lower end of said upper section on the upper end of said lower section, an elongated upright support generally paralleling said pipe and including vertically spaced spray nozzles thereon, said upright support including upper and lower portions spaced alongside said upper and lower sections, third means pivotally attaching the lower end of said upper portion to the upper end of said lower portion for angular displacement of said upper portion relative to said lower portion about a horizontal axis between an upright position and a generally horizontal position disposed over said tank, fourth means guidingly supporting said upper and lower portions from said upper and lower sections, respectively, for generally longitudinal shifting of said portions relative to the corresponding sections, flexible means communicating said pipe sections with the spray nozzles on the corresponding support portions, means communicating the interior of said tank with the interior of said outlet pipe, and drive means connected between said chassis and said lower support portion for vertically oscillating said upstanding support.