Patent ID: 9731235
Date: 2017-08-15
CPC Classifications: B01D

Claim:
1. A filter appliance comprising: a filter housing and a ring filter element having an axis and being mountable in the filter housing, the ring filter element including a first axial end disc, having an axially protruding pin configured to engage into a channel of the filter housing when the ring filter element is mounted in the filter housing, the filter housing defining an interior having a first region, the ring filter element having a second region associated with the first region, a guide contour arranged on one of the first region and the second region, a first guide element disposed on the other of the first region and the second region, wherein the first guide element is configured to be guided on the guide contour during the mounting of the ring filter element in the filter housing, the guide contour including a first axial groove, wherein the axially protruding pin engages into the channel and the first guide element engages into the first axial groove of the guide contour when the ring filter element is mounted in the filter housing, the guide contour further including at least one second axial groove, and a second guide element disposed on the one of the first region and the second region including the first guide element, the second guide element associated with a second axial groove disposed on the guide contour, wherein the first axial grooves and the second axial groove are disposed complementary to the associated first guide elements and the second guide element to define a lock and key interaction between the filter housing and the ring filter element.