HIGH PRESSURE FLUID SPRAY NOZZLE INCORPORATING A FLOW CONTROLLED SWITCHING VALVE

摘要

A nozzle assembly comprises a hollow nozzle body having a central bore and a plurality of ports extending through the body from the central bore; and a switching valve cartridge disposed in the central bore that directs fluid flow to ports upon application of fluid flow above a predetermined threshold to the inlet and direct fluid flow to different ports upon fluid flow having subsequently dropped below the predetermined threshold and then exceeding the predetermined threshold. The cartridge comprises a cylindrical cartridge case having a front portion and a cup shaped rear portion, a cylindrical poppet slidably disposed within the cup shaped rear portion of the cartridge case, and a biasing member within the cartridge case between the front portion of the case and the poppet urging the poppet away from the front portion of the cartridge case.

主权项

1. A switching valve cartridge for use in a nozzle body having a central bore, the cartridge comprising:
a generally tubular cartridge case having a front portion and a cup shaped rear portion, the front portion having a peripheral annular channel and a first plurality of axial bores therethrough for axial passage of fluid out of the front portion and a second plurality of bores therethrough for passage of fluid to the annular channel; a cylindrical poppet slidably disposed in the rear portion of the cartridge case, the poppet having a plurality of axially extending poppet bores therethrough; a biasing member within the rear portion of the cartridge case between the front portion and the poppet biasing the poppet away from the front portion of the cartridge case; and a guide member between the rear portion of the cartridge case and the poppet engaging a corresponding feature on the poppet to rotate the poppet as it slides forward and rearward within the rear portion of the cartridge case.