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US 7,628,831 B2Granted
Cyclonic separating apparatus
AssigneeDyson Technology Limited
InventorsRicardo Gomiciaga-Pereda, James Dyson, Edward Charles Ormerod, John Lee Gruenig
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AssigneeDyson Technology Limited
InventorsRicardo Gomiciaga-Pereda, James Dyson, Edward Charles Ormerod, John Lee Gruenig
Estimating the term…
A cyclonic separating apparatus includes a chamber for separating dirt and dust from an airflow, an inlet to the chamber and a shroud. The shroud includes a wall having a multiplicity of through-holes forming an outlet from the chamber, each of the through-holes having substantially rectangular cross-sections with width to height ratios in the range of 1.5:1 to 1:1.5. The rectangular cross section of the through-holes maximizes the available through-hole area in the shroud, produces a low pressure drop across the shroud and reduces the amount of material required for manufacture. Further, this ratio allows the cross-sectional area of the through-holes to be dimensioned to prevent larger particles of dirt and dust from passing through the through-holes in the shroud, while still providing the required structural integrity.
A cyclonic separating apparatus comprising a chamber for separating dirt and dust from an airflow, an inlet to the chamber and a shroud comprising a wall having a multiplicity of through-holes forming an outlet from the chamber, each through-hole having a width and a height, wherein the through-holes have substantially rectangular cross-sections with width to height ratios in the range of 1.5:1 to 1:1.5, wherein the wall has a curved outer surface and each through-hole has an axis which is arranged at an obtuse angle to the tangent of the curved outer surface of the wall at an upstream side of the through-hole.
Dependencies are inferred from the claim text.