Compact centrifugal fan and filter assemblies for use in providing laminar flow clean air to a work space environment such as those within clean rooms and clean air work stations or cabinets wherein the fan and filter element are mounted in a close physical relationship with respect to one another and...http://www.google.es/patents/US4560395?utm_source=gb-gplus-sharePatente US4560395 - Compact blower and filter assemblies for use in clean air environments
Compact blower and filter assemblies for use in clean air environments
