Abstract: A filter assembly for a liquid to be filtered, especially for use in a conditioning unit for the lubricating oil of a motor vehicle, including a filter cartridge (8) concentrically arranged around a center tube (9) through which a liquid stream may flow. The filter assembly includes a bypass valve (11) through which unfiltered liquid can flow into the center tube (9) if the filter cartridge becomes clogged. The bypass valve (11) is durably affixed by a valve plate (21) so that a valve body (16) is urged against the valve plate (21) by a valve spring (19) supported by supports (20) extending axially in the center tube (9).

Abstract: A filter for filtering the lubricating oil in an internal combustion engine. The filter comprises a housing (10) having an unfiltered oil inlet and a filtered oil outlet. A filter element (16) is disposed in the housing (10). A cover (13) is provided with a safety element (20) which effectively prevents the housing (10) from being closed by the cover (13) if the filter element (16) is missing. The safety element is a tipping member affixed to the housing or the cover and which tips under the force of gravity into a blocking position when the filter element is missing.

Abstract: A fluid filter having a substantially pot-shaped housing 10 in which is disposed a filter insert 11 including a pleated filter element 18 and end plates 19 and 20. The housing has a mounting flange 12 and a cover 13. The cover is connected to the mounting flange by a threaded connection or a bayonet connection. The fluid filter is attached by the mounting flange 12 to a supporting structure by at least one catch or a hinge in the form of a holding flange 29 and a projection 30.