초록 ▼

Liquid fan spray system for cyclically deflecting a liquid jet between extreme positions defined by a pair of end walls is assured of cold weather operation by expanding the liquid power jet. In the preferred embodiment, one boundary wall of the oscillator is tapered about 5°from the power nozzle to

Liquid fan spray system for cyclically deflecting a liquid jet between extreme positions defined by a pair of end walls is assured of cold weather operation by expanding the liquid power jet. In the preferred embodiment, one boundary wall of the oscillator is tapered about 5°from the power nozzle to the outlet throat, and the outlet or throat has the substantially same cross-sectional area maintained for a given oscillatory angle by closing down the lateral extremities of the outlet throat. This assures cold weather starting when the liquid has increased surface tension and viscosity while at the same time maintaining essentially the same fan angle of the cyclically deflected power jet. The invention is particularly useful in providing all weather oscillation in windshield washer systems for automobiles.

대표청구항 ▼

In fan spray apparatus for a windshield washer system of an automobile including: an oscillation chamber having left and right side walls having curved portions leading to an outlet throat, a power nozzle for introducing a liquid power jet into said oscillation chamber and control passages for intro

In fan spray apparatus for a windshield washer system of an automobile including: an oscillation chamber having left and right side walls having curved portions leading to an outlet throat, a power nozzle for introducing a liquid power jet into said oscillation chamber and control passages for introducing control signals from control ports to each side of the power jet issuing from said nozzle to cause said jet to be cyclically deflected as it leaves said outlet throat, and means for introducing control signals to said control passages, said outlet throat coaxially aligned with said power nozzle and having a cross-sectional area related to the cross-sectional area of said power nozzle so as to provide a liquid fan spray of a predetermined fan angle and directed towards said windshield, the improvement comprising: said oscillation chamber having a pair of top and bottom walls diverging from each other in the direction of said outlet throat so as to expand said power jet in cold weather, when the cleaning liquid to be sprayed has increased surface tension and viscosity, while maintaining essentially the same fan angle of the cyclically deflected jet, in a direction transverse to the direction of travel thereof in advance of said outlet throat.