Patent ID: 8286804

Claim:
A liquid filter comprising: a filter housing having a first thread and a drain passage; a filter element comprised of a filter medium and arranged in said filter housing; a filter lid comprising a second thread sized and configured to lockingly engage said first thread for connecting said filter lid to said filter housing, said filter lid further including a filter bypass valve for bypassing the filter element when a pressure loss that is too high occurs when liquid passes through the filter medium of the filter element; and a first set of bayonet connectors provided on said filter lid; a second set of bayonet connectors provided on said filter element, said second set of bayonet connectors sized and configured for connecting said filter element to said filter lid by engaging with said first bayonet connectors; and a double-concentric seal arranged on said filter element for closing off said drain passage; wherein said first set and said second set of bayonet connectors removeably lockably engage by rotating said lid relative to said filter element in a first direction such that said filter element is lockably connected to said lid; wherein said first set and said second set of bayonet connectors are configured and adapted to decouple when said filter lid is screwed onto said filter housing in a second direction opposing said first direction.