Patent ID: 7237681

Claim:
A ring filter element for an oil filter for purifying lubricant oil, for an internal combustion engine of a motor vehicle, having an annularly positioned filter material ( 2 ), having at least one end disk ( 4 ), which seals the filter material on its end, and which has a journal ( 5 ), which is positioned eccentrically in relation to the lengthwise central axis ( 3 ) of the ring filter element ( 1 ) and projects outward, comprising a discharge channel ( 6 ), which penetrates the journal ( 5 ) and the associated end disk ( 4 ) radially next to the filter material ( 2 ), wherein the discharge channel ( 6 ) communicates with an inner chamber ( 7 ) of the ring filter element ( 1 ) encircled by filter material ( 2 ), wherein the discharge channel ( 6 ) communicates with a clean side of the ring filter element ( 1 ), and wherein a throttle ( 8 ) is positioned or implemented at or in an outlet end of the discharge channel ( 6 ) or upstream from the discharge channel ( 6 ).