Quick disconnect nozzle assembly with twist-on spray tip

A quick disconnect nozzle assembly comprising, in combination, a nozzle body, an annular sealing member and a spray nozzle tip, said nozzle body having means at one end thereof for connection to a source of spray fluid and a socket portion at the other end for reception of said spray tip, said nozzle body and tip each having internal bores for the passage of fluid therethrough, said internal bore of said body including an enlarged chamber portion for receiving said annular sealing member, said socket having a plurality of chord-like lugs adjacent the downstream end thereof, each of said lugs having a generally radially extending triangular portion on the upstream face thereof with a sloping cam surface extending outwardly from at least one of the legs of said triangular portion to the outer wall of said socket portion in chord-like fashion, said nozzle tip having a spring spray orifice at one end and a base portion at the other, said base portion having a plurality of generally radially extending shoulders each having a cam recess formed in the downstream face thereof, said cam recess having a central seat portion corresponding to said triangular portion on said socket lug and a sloping cam surface corresponding to said cam surface on said socket lug, each of said shoulders having an entrance ramp adjacent said socket for engagement with said socket lug when said nozzle tip is inserted in said socket and rotated to cam said socket lug into said shoulder recess, said cooperting cam surfaces on said socket lugs and shoulder recesses causing said nozzle tip to move axially into said socket as said tip is rotated and to press the upstream end of said tip into sealing engagement with the downstream end of said annular sealing member.