Embodiments of a fluid filtering assembly are shown and described, each embodiment including a valve head that routes fluid to and from a filter cartridge and that includes a valve system that automatically opens and closes when the filter cartridge is inserted and removed, respectively. The...http://www.google.es/patents/US5744030?utm_source=gb-gplus-sharePatente US5744030 - Filter assembly with automatic shut-off and quick-connect filter cartridge
Filter assembly with automatic shut-off and quick-connect filter cartridge ...
