Notetry Limited

Andrew Walter McRae Thomson

Peter David Gammack

James Dyson

The invention provides apparatus for separating dirt or dust from an airflow, comprising a collector ( ) having an outer wall ( ) forming an air-rotational surface, an inner wall ( ), an airflow inlet for introducing the airflow substantially tangentially to the outer wall ( ), an airflow outlet for removing air from the collector ( ), and at least one fin or baffle ( ) positioned within the collector ( ), characterized in that the or each fin or baffle ( ) is located on the inner wall ( ) of the collector ( ) and projects outwardly therefrom. The presence of the fins or baffles ( ) on the inner wall ( ) discourages re-entrainment of dirt and dust particles remaining within the separation apparatus after the airflow therethrough has been discontinued.

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Gloucestershire, United Kingdom

Andrew Walter McRae Thomson