Liquid spray systems

Abstract

A vehicle washer nozzle liquid spray system having a source of washer liquid under pressure, a fluidic oscillator comprising a housing and a fluidic insert having a power nozzle, an oscillation chamber having an upstream end coupled to the power nozzle for issuing a jet of washer liquid into the oscillation chamber and a downstream end having an outlet aperture for issuing a jet of wash liquid to ambient, and side and top and bottom walls, an oscillation inducing silhouette in the oscillation chamber for causing said jet of wash liquid to rhythmically sweep back and forth between the sidewalls in the oscillation chamber. Top and bottom walls of the oscillation chamber first diverge for a predetermined distance in a downstream direction and then converge towards each other through said outlet aperture. This enables the deflection angle to be adjusted for different vehicles uses and applications by changes to the fluidic insert without changes to the housing.

What is claimed is:  
     
       1. In a vehicle washer nozzle system having a source of washer fluid under pressure, a fluidic oscillator having a power nozzle, an oscillation chamber having an upstream end coupled to said power nozzle for issuing a jet of washer liquid into said oscillation chamber and a downstream end having an outlet aperture for issuing a jet of wash fluid to ambient, and side and top and bottom walls, an oscillation inducing means in said oscillation chamber for causing said jet of wash fluid to rhythmically sweep back and forth between said sidewalls and said oscillation chamber, the improvement wherein said top and bottom walls first gradually diverge for predetermined distance in a downstream direction and then gradually converge towards each other through said outlet aperture. 
     
     
       2. A vehicle windshield washer system defined in  claim 1  wherein said walls diverge at about a 5° angle and said walls begin to converge towards each other at a position in advance of said outlet aperture. 
     
     
       3. In a washer nozzle system having a source of washer fluidic under pressure, a fluidic oscillator having a power nozzle, an oscillation chamber having an upstream end coupled to said power nozzle for issuing a jet of wash liquid into said oscillation chamber and a downstream end having an outlet aperture for issuing a jet of wash fluid to ambient, and side and top and bottom walls, an oscillation inducing means in said oscillation chamber for causing said jet of wash fluid to rhythmically sweep back and forth between said sidewalls and said oscillation chamber, the improvement wherein said top and bottom walls first gradually diverge for predetermined distance in a downstream direction and then gradually converge towards each other through said outlet aperture. 
     
     
       4. A washer nozzle system defined in  claim 3  wherein said walls diverge at about a  5 ° angle and said walls begin to converge towards each other at a position in advance of said outlet aperture.