Patent ID: 8123938

Claim:
Filter device for filtering a liquid, comprising: a filter housing having a least one inlet for liquid to be filtered and at least one outlet for filtered liquid, a filter element positioned in a flow path of the liquid between the at least one inlet and the at least one outlet, a sealing device having at least one sealing element and a first sealing surface associated with the sealing element, the sealing element in a sealing position being positioned in a sealing manner on the first sealing surface for sealing off a dirt area arranged upstream of the filter element for liquid to be filtered from a clean area arranged downstream of the filter element for filtered liquid, and a locking device, the sealing element being adapted to be locked in the sealing position at least in an axial direction relative to the first sealing surface by means of the locking device; wherein: a supporting ring comprising the first sealing surface or the sealing element is held in the filter housing; and the supporting ring is held together with the filter element for movement in the axial direction in the filter housing with the sealing element continuing to lie in a sealing manner on the first sealing surface.