Patent ID: 8287612

Claim:
A filter element, comprising: a zigzag-folded filter medium ( 10 ) arranged in a tubular concentric shape; a first end plate ( 11 ) arranged at an axial end face of said concentric filter medium, said first end plate having a central portion that is either open or closed; and a second end plate ( 12 ) arranged at an opposing axial end face of said filter medium; wherein said second end plate ( 12 ) includes a concentric opening ( 13 ) therethrough, said second end plate extending substantially in a circular ring-shape about end face folds of the filter medium; wherein said second end plate ( 12 ) includes an outwards facing ring face including a first annular bead ( 14 ) extending axially outwards from said second end plate in a direction axially away from said filter element; wherein the second end plate ( 12 ) further includes a reinforcement plate ( 17 ) arranged at said opposing axial end face in an area between the said filter medium end face and said annular bead, wherein the reinforcement plate has an annular surface ( 23 ) extending in axial direction outwardly across the filter element wherein said outwards facing ring face of said second end plate ( 12 ) includes a sealing groove ( 16 ) formed in said ring face.