An improved two-stage separator uses reusable containers for collecting particles separated by each separation stage. The reusable containers are constructed such that a user empties both reusable containers by the actions required to empty just one of the reusable containers....http://www.google.es/patents/US6582489?utm_source=gb-gplus-sharePatente US6582489 - Method and apparatus of particle transfer in multi-stage particle separators
Method and apparatus of particle transfer in multi-stage particle separators
