Spray nozzle arrangements for high pressure cleaning apparatus

A spray nozzle assembly adapted for connection with the supply conduit (1) of high pressure cleaning apparatus, comprising

• (a) an outlet nozzle (6) containing a longitudinal through bore of circular cross-section for producing a liquid jet (11);
• (b) casing means for supporting said outlet nozzle in alignment opposite the supply conduit, said casing means including a generally tubular casing (3) adapted for connection at one end with the supply conduit, said casing containing intermediate its ends annular support means (4) for concentrically receiving said outlet nozzle;
• (c) adjustable spray deforming means (35) mounted within said casing adjacent the other end thereof for converting the jet into a fan-shaped configuration, said deforming means including a pair of spaced shaft pieces (13, 14) having adjacent planar surfaces (15, 16), respectively, said shaft pieces being mounted transversely within said casing downstream of the outlet nozzle for rotation about a common axis normal to the casing axis between a first position in which said planar surfaces are opposite one another and parallel with the casing axis on opposite sides of the jet, and a second position in which said planar surfaces diverge in the direction of the outlet nozzle, portions of said planar surfaces remote from said outlet nozzle extending within the jet when said deforming means are in said second position, thereby to produce the desired fan-shaped spray configuration.