A candle filter assembly for a filter device includes, in an exemplary embodiment, a tubular core having an outer surface and an inner surface, and including a plurality of openings extending therethrough, a filter media supported by the core defining a core and filter media subassembly, and a drain...http://www.google.es/patents/US7487875?utm_source=gb-gplus-sharePatente US7487875 - Candle filter assembly and candle filter element
