Abstract: A clamping arrangement for quickly and easily mounting a spray nozzle on a support boom in predetermined orientation without the necessity for handling of separate fasteners and without disassembly of the nozzle. The clamping arrangement includes a pair of clamping elements that each have first cooperating portions for positioning about opposed sides of the support boom and second cooperating portions for positioning about opposed sides of the nozzle, and at least one of the clamping elements carries a fastener that is engageable with the other clamping element for securing the elements in mounted position on the boom with the nozzle captively held therein. The nozzle and clamping elements cooperate to both angularly and vertically orient the nozzle in relatively precise predetermined relation to the boom as an incident to such mounting.

Abstract: A spray nozzle for producing a hollow conical liquid spray having a body formed with a cylindrical whirl chamber having a tangentially disposed liquid inlet passage and an orifice cap removably mountable at the end of the whirl chamber formed with a spray discharge orifice of the desired configuration. The nozzle body includes an upstanding post concentrically disposed within the whirl chamber for guiding pressurized liquid in a tangential direction about the whirl chamber, and the post has a recessed upper end for receiving the air core of whirling liquid within the chamber to retain the proper axial position of the air core and to prevent air core damage to the nozzle body.