Device for connecting a fan to a face mask filter

摘要

A device for connecting a fan to the inlet of a face mask filter including an adapter having resilient arms to fasten it to the filter and an air duct extends from the fan outlet to the filter inlet. The adapter has an internal seal to connect the outlet end of the air duct to the inlet of the filter. A housing for the fan is partly molded directly on the adapter adjacent to the inlet end of the air duct. The air duct is short and straight and has low flow resistance.