Filter with annular formed filter medium

摘要

The filter includes a filter cartridge containing filter medium(20) formed in annular fashion between end plates(22). The filter has a housing structure with a cut-out(23) in the filter medium for an additional functional component. The additional functional component may be a water level sensor probe(25) or a suction connector(24) for a fluid drain(16). The filter medium consists of a filter paper folded over in circular fashion. An Independent claim is included for a filter cartridge incorporating the aforesaid features.