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 nozzle assembly comprising:
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 operable to direct fluid flow from an inlet to at least one of the plurality of ports upon application of fluid flow above a predetermined threshold to the inlet and direct fluid flow from the inlet to at least a different one of the plurality of ports upon fluid flow having subsequently dropped below the predetermined threshold and then exceeding the predetermined threshold, the cartridge comprising: 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; a guide cooperating with the poppet to alternate fluid flow between the ports wherein the guide includes one or more guide members engaging the poppet to alternatingly align the poppet with the at least one of the plurality of ports and the different one of the plurality of ports each time the poppet abuts the front portion of the 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. wherein each transition below the predetermined threshold causes the poppet to rotate the permit fluid flow to alternate between the first and second set of ports.