Filter device and filter element for use with such a filter device

A filter device, comprising:

• at least one filter housing having an element receiver interacting with a bottom part of said filter housing;
• and
• at least one filter element defining a longitudinal axis and being received in said filter housing, said filter element being in a form of a filter cartridge with filter material and having an end cap forming an enclosure for an end edge of said filter material, said element receiver and said end cap having parts engaging one another in a functional position of said filter element in said filter housing, said parts having shape irregularities matched to one another and engaging in a single aligned positional relationship only, said shape irregularities deviating outside contours of said element receiver and said end cap from a circular shape, said outside contours having asymmetrical shapes, said element receiver including a tube socket projecting from a top thereof and extending into an inner filter cavity of said filter element to form a fluid connection in the functional position, said tube socket having said shape irregularity of said element receiver providing said outside contour thereof deviating from the circular shape, said end cap including a connector extending into said inner cavity of said filter element, said inner cavity being surrounded by a fluid-permeable support tube, said connector being engaged by said tube socket in the functional position of said filter element and having an opening cross section with said shape irregularity of said end cap matched to said outside contour of said tube socket, said outside contour of said tube socket and said opening cross section of said connector each including one segment in a graduated circle concentric to said longitudinal axis and a corrugated segment closer to said longitudinal axis than the respective graduated circle.