Filter arrangement and half coupling element comprising a filter arrangement

A filter arrangement, comprising:

• a first body member having a forward portion and a rearward portion delimiting a first fluid conduit, the first body member comprising a first axial front surface and a first radial sealing surface;
• a second body member having a forward portion and a rearward portion delimiting a second fluid conduit, the second body member comprising a second axial front surface and a second radial sealing surface;
• at least one filter element and at least one contact portion, wherein the at least one contact portion is configured to be longitudinally secured to the at least one filter element;
• at least one elastic contact element which is elastically deformable;
• the first body member and the second body member being configured to be complementarily coupled together along a longitudinal axis of the filter arrangement with a bayonet connecting device;
• the bayonet connecting device having at least one bayonet pin and at least one bayonet slot;
• wherein the at least one bayonet pin is longitudinally secured with one of the first body member or the second body member;
• and
• the at least one bayonet slot is arranged on the other of the second body member or the first body member and is configured to receive the at least one bayonet pin;
• wherein the at least one bayonet slot comprises a bayonet entrance and a circumferential notch, wherein, in a coupled state of the filter arrangement, the bayonet pin is engaged with a forward wall of the circumferential notch of the bayonet slot to lock a longitudinal displacement of the first body member relative to the second body member;
• wherein, in the coupled state, a longitudinal fluid conduit is formed by the first fluid conduit and the second fluid conduit and wherein the filter element is disposed in the longitudinal fluid conduit;
• wherein, in the coupled state, the at least one contact portion and the at least one elastic contact element are axially compressed between the first axial front surface and the second axial front surface, the at least one elastic contact element being at least partially elastically deformed and in longitudinal contact with the at least one contact portion;
• the filter arrangement further comprises a first sealing element that is received in a groove of the second radial sealing surface of the second body member;
• wherein the first body member and the second body member are configured such that, when the filter arrangement is brought into the coupled state, the first radial sealing surface at least partially covers the groove of the second radial sealing surface before the at least one contact portion and the at least one elastic contact element are at least partially axially compressed between the first axial front surface and the second axial front surface, and in that, in the coupled state, the first sealing element is configured to seal the longitudinal fluid conduit by radial cooperation with the first radial sealing surface and with the second radial sealing surface, the first radial sealing surface completely covering the groove.