| 摘要 |
<p>Method and apparatus for creating a cyclonic action within a cannister. Communication of air between a first truncated conical member with a hole or opening located in its central area and the inside of the lower casing of the cannister takes place using an annulus between the outside of the conical member or, alternatively, by using holes or openings extending through the conical member. Transition areas create lower pressure areas which attract debris laden air downwardly so as to deposit the debris in the lower pressure area of the cannister.</p> |
