A - Human Necessities – 47 – L
Patent
A - Human Necessities
47
L
A47L 9/16 (2006.01) B04C 5/26 (2006.01) B04C 11/00 (2006.01)
Patent
CA 2209138
The invention provides a shroud (10; 40) for use in apparatus incorporating cyclonic dust separation means for separating dirt and dust from an airflow, the shroud (10; 40) comprising a perforated portion (14; 44) having a multiplicity of perforations (30; 46) for allowing the airflow to pass therethrough. According to the invention, the upstream edge of each perforation (30) meets the upstream surface (28) of the shroud (10) at a sharply defined angle. The invention improves the performance of the dust separation apparatus in conjunction with which the shroud (10; 40) is utilised.
L'invention concerne une enveloppe (10; 40) destinée à un appareil comprenant un moyen de séparation du type cyclone pour séparer les poussières et d'autres impuretés contenues dans un flux d'air, l'enveloppe (10; 40) ayant une portion perforée (14; 44) avec une multitude de perforations (30; 46) pour permettre le passage de l'air. Selon l'invention, le bord amont de chaque perforation (30) vient rencontrer la surface amont (28) de l'enveloppe (10) à un angle défini avec précision. L'invention permet d'améliorer l'efficacité du séparateur de poussières utilisé avec l'enveloppe (10; 40).
Marks & Clerk
Notetry Limited
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