Fluid metering and spraying
AssigneeDelavan Inc.
InventorsJ. Michael Soth, Roy E. Pack, Jr.
Life of this patent
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Abstract
In an orifice and nozzle for the passage of fluid which may contain solid particulates as contaminants, the orifice and nozzle includes an opening which is rectangular in a cross-sectional plane perpendicular to the axis of the fluid flow. The rectangular opening has a ratio of minimum width to minimum depth, or vice versa, of less than approximately 1.5, and preferably 1.0, and a ratio of the length of the opening to the lesser of minimum width and minimum depth of the opening of less than approximately 2.0, and preferably 1.0. The rectangular cross section together with these ratios prevents plugging by the solid contaminants.
Claims28
Means defining an orifice for the passage therethrough of fluid at low flow rates which fluid may contain solid particulates, said orifice comprising an opening which is substantially rectangular in a cross sectional plane perpendicular to the axis of the fluid flow therethrough, said opening having a ratio of minimum width to minimum depth, or vice versa, of less than approximately 1.5, the lesser of said minimum width and said minimum depth not exceeding approximately 0.2 mm., and a ratio of the length of the opening to the lesser of minimum width and minimum depth of the opening of less than approximately 2.0.
In a fluid nozzle having a discharge orifice, a chamber for swirling fluid upstream of said discharge orifice and second orifice means for introducing said fluid into said chamber and for imparting swirl to said fluid, wherein the improvement comprises:
- said second orifice means including at least one opening therein which is smaller in cross section than said discharge orifice, said opening being substantially rectangular in a cross sectional plane perpendicular to the axis of the fluid flow therethrough, said opening having a ratio of minimum width to minimum depth, or vice versa, of less than approximately 1.5, the lesser of said minimum width and said minimum depth not exceeding approximately 0.2 mm, and a ratio of the length of the opening to the lesser of minimum width and minimum depth of the opening of less than approximately 2.0.
A method of metering fluid which may contain solid particulates at low flow rates comprising flowing said fluid through an orifice having at least one which is substantially rectangular in a cross sectional plane perpendicular to the axis of the fluid flow therethrough, said opening having a ratio of minimum width to minimum depth, or vice versa, of less than approximately 1.5, the lesser of said minimum width and said minimum depth not exceeding approximately 0.2 mm, and a ratio of length to the lesser of minimum width and minimum depth of less than approximately 2.0.
Dependencies are inferred from the claim text.