SE331970B - - Google Patents

Abstract

1,211,068. Spray producers. SPRAYING SYSTEMS CO. 16 May, 1969 [4 June, 1968], No. 25206/69. Heading B2F. A nozzle assembly comprising nozzles 29, Fig. 1, and associated passages 31 in a plate 23, is prevented from being re-indexed to the inlet conduit 20 during the flow of fluid by the interaction of a bevelled projection 41 in a sealing and latching element 34 with a matching, bevelled, recessed annular surface 42 formed in the plate 23 around each of the passages 31, the projection being held firmly in position by the pressure of fluid against the rear surface of the element. The projection is otherwise lightly held against the surface 42 by a spring 38. When the nozzle assembly is rotated about the screw 25, the rear face of plate 23 moves the projection and element rearwardly until another passage 31 is in the indexing position. This rearward movement breaks the seal 40 between the element and plate, and enables pressure fluid to escape into an annular passage 44 from which it is taken off through bleed passages 43 directed in the same direction as the nozzle orifices. The nozzle tips 29 may be mounted between the plates 23 and 24, as shown. Alternatively, different styles and patterns of orifices may be formed in a single nozzle plate (51, Figs. 4 and 5, not shown). In the construction depicted in Fig. 6, the bevelled projection 71 cooperates with a correspondingly shaped recess 72 in the rear portion of each nozzle tip.