The present invention provides an adapter for sealingly receiving ferrules of standard optical fiber connectors such that the end faces of the ferrules are protected from moisture when inserted into the adapter. The adapter has a sealing sleeve that defines a sealing surface at each end to circumferentially...http://www.google.es/patents/US5781680?utm_source=gb-gplus-sharePatente US5781680 - Sealed optical fiber connector adapter
