Patent ID: 6085996
Filing Date: 2000-07-11
Classification: B05B

Abstract:
A fluid nozzle for a fluid spraying device that supplies a fluid and pressurized air to said fluid nozzle for atomizing and ejecting the fluid as a spray, comprising:a main body that removably attaches to the spray device, said main body having a fluid passageway with first and second ends, and an air passageway with first and second ends, wherein the first fluid passageway end aligns with a fluid passageway of the spray device for fluid communication, and said air passageway first end aligns with an air passageway of the spray device for air communication;a first nozzle tip operatively connected to said main body wherein said first nozzle tip has a fluid channel there through, said first fluid channel providing fluid flow between said fluid passageway second end and a reduced size first orifice of said first nozzle tip for ejecting the fluid from the first nozzle tip, said first nozzle tip further including a portion for releasably securing said first nozzle tip to said main body, and a first seating portion within said channel for seating with a fluid flow regulating needle of the spray device;wherein said reduced size first orifice is positioned so that the ejected fluid is atomized by an airflow that has exited said fluid nozzle via the second end of the air passageway; and wherein said first fluid channel includes at least a surface substantially more resistant to abrasion than a surface of said fluid passageway, wherein said atomizing air flow exits into a further annular passage formed between said main body and an air cap, said annular passage having an abrupt increase in cross sectional area so as to increase the turbulence of said air flow and to provide a more uniform air velocity exiting said air cap;a second nozzle tip for attaching to said main body as a replacement for said first nozzle tip when said first nozzle tip is detached from said main body, said second nozzle tip having a second fluid channel there through, said second fluid channel providing fluid flow between said fluid passageway second end and a reduced size second orifice of said second nozzle tip for ejecting the fluid from the second nozzle tip; anda plurality of cylindrical passages axially arranged about the center axis of said main body through which atomizing air in fed therethrough and into an annular plenum chamber within said main body formed between an outer circumferential wall of said main body and said nozzle tip.