A filter element is provided at the inlet of a spigot for dispensing beverages from a reservoir or cooler. The filter mechanism preferably includes an open, cup-shaped member which is desirably threaded to the inlet shaft of the spigot to act as a fastener for mounting the spigot to the reservoir. The...http://www.google.com/patents/US4181243?utm_source=gb-gplus-sharePatent US4181243 - Device for filtering beverages
