A bagless canister vacuum cleaner includes a selectively removable dirt cup, and an airstream flows rotationally through the dirt cup between an interior wall of the dirt cup and a filter assembly selectively mounted in the dirt cup so that entrained contaminants are separated from the airstream flowing...http://www.google.es/patents/US20040163201?utm_source=gb-gplus-sharePatente US20040163201 - Bagless canister vacuum cleaner
Número de solicitud: 10/790,304 Número de publicación: US 2004/0163201 A1 Fecha de presentación: 1 Mar 2004 Patente emitida: US7052523 ( Fecha de emisión 30 May 2006)
