Patent ID: 8801927

Claim:
A filter system for filtering fluids, the filter system comprising: a housing; a filter element arranged inside said housing; an inlet for a fluid to be filtered; an outlet for the filtered fluid; a cover closing said housing and, when removed from said housing, providing access to said filter element inside said housing; a securing device that prevents said housing from being closed by said cover when said filter element is missing; wherein said filter element has at least one filter element guide path section; wherein said housing or said cover has a rim area with at least one rim guide path section; wherein the filter element includes a first end disk secured at an axial end face of filter media of the filter element, the first end disk including: a radial outer rim; wherein the end disk at its radial outer rim forms at least one radially extending projection extending radially outwards from the radial outer rim; wherein the least one radially extending projection are spaced apart on the radial outer rim in a circumferential direction forming circumferential gaps therebetween; wherein the at least one radially extending projection forms the at least one filter element guide path section; wherein the housing includes: at least one axial projection formed on a rim area at an open axial end face of the housing, the at least one axial projection extending axially outwardly from the housing open end face; wherein the at least one axial projection are spaced apart on the open axial end face of the housing in a circumferential direction forming circumferential gaps therebetween; wherein the at least one axial projection forms the at least one rim guide path section; wherein the at least one filter element guide path section engages into corresponding ones of the gaps between the at least one rim guide path section; wherein said securing device comprises at least one securing element arranged on said cover or on said housing or on a separating element disposed between the cover and the housing; and wherein at least one of the at least one rim guide path section and the at least one filter element guide path section have a radially inwardly slanted ramp surface forming the guide path along which the at least one securing element is guided when moving the cover relative to the housing in a closing direction.