Patent ID: 7581687

Claim:
A spray nozzle assembly comprising: a base configured to communicate with a supply of fluid; a nozzle coupled to the base, the nozzle defining a first fluid passage for the passage of fluid; a first deflector surface to deflect fluid received from the nozzle with a first spray pattern, the first deflector surface having a first position in fluid communication with the first fluid passage and a second position not in fluid communication with the first fluid passage; a flow-control device between the nozzle and the first deflector surface, the flow-control device defining a second fluid passage configured for fluid communication with the first fluid passage; the first fluid passage having a first diameter and the second fluid passage having a second diameter, the first diameter being smaller than the second diameter such that a pressure drop at an interface between the nozzle and the flow-control device is formed from a fluid flowing therethrough to minimize fluid leakage at the interface; and wherein the flow-control device includes a second deflector surface to deflect fluid received from the nozzle with a second spray pattern, the second deflector surface having a third position in fluid communication with the first fluid passage and a fourth position not in fluid communication with the first fluid passage.