# US 8,540,873 B2 · Ring filter insert for a liquid filter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,873 B2 - Document ID: US8540873B2 - Status: Granted - Kind: B2 - Application number: 12/520,268 - Filed: 2007-11-02 - Published: 2010-06-24 - Granted: 2013-09-24 - Earliest claimed: 2006-12-20 - Assignees: Mahle International GmbH - Applicants: Torsten Lika - Inventors: Torsten Lika - Web page: https://patentgrep.com/patent/US8540873B2 ## CPC - B01D 36/003: {Filters in combination with devices for the removal of liquids (B01D35/185 takes precedence)} - B01D 27/148: {arranged concentrically or coaxially} - B01D 35/18: Heating or cooling the filters - B01D 2201/295: with projections extending in a radial outward direction, e.g. for use as a guide, spacing means - B01D 2201/34: Seals or gaskets for filtering elements - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract A ring filter insert (3) which can be flowed through radially has, in at least one of its end disks (4, 5), at least one connecting channel (28) which runs radially between interior and exterior of this end disk (4; 5). With such a ring filter insert (3), through a liquid supply channel (14) which is conducted through the central inner space of the ring filter insert (3) which serves as the crude space or clean space, it is possible in construction and rational terms to pass liquid through the at least one connecting channel (28) in at least one of the two end disks (4, 5) of the ring filter insert (3) from the radial inside outward into one of the two crude spaces or clean spaces which are sealed from the other crude space or clean space and communicate only through the filter medium of the ring filter insert (3). The flow through the at least one connecting channel (28) in at least one of the two end disks (4, 5) may also be in the reverse direction from the radial outside inward. ## Claims ### Claim 1 A filter device which can be flowed-through, comprising: a first annular and a second annular end disk for a liquid ring filter, a cylindrical filter housing, in which the ring filter is supported within the filter housing, a central mounting opening provided at an axial end of the filter housing and a cylindrical rod which serves as a liquid supply device, wherein the filter housing is reversibly slid by the mounting opening onto the rod, and wherein the liquid filter device is operational when the filter housing is slid onto the rod, and the rod penetrates the ring filter of the filter at least partially, an end of the filter housing facing away from the mounting opening, wherein the first end disk of the ring filter is adjacent to the end of the filter housing-facing away from the mounting opening, a radially outer crude chamber and a radially inner clean chamber, wherein the ring filter forms within the filter housing the crude chamber and the clean chamber, a receiving chamber, located between the first end disk and the end of the filter housing facing away from the mounting opening, the receiving chamber is provided which is separated from the crude chamber by the first end disk; a discharge port for cleaned liquid is provided in an area adjacent to the mounting opening of the filter housing to communicate with the clean chamber within the filter housing, and an operational assembly condition of the filter including the ring filter, the filter housing, and the rod, wherein the first end disk has at least one connection channel; which connects an interior of the rod conveying liquid to be cleaned and the crude chamber. ### Claim 2 (depends on 1) A filter device according to claim 1, wherein the at least one connection channel is arranged within the first end disk. ### Claim 3 (depends on 1) A filter device according to claim 1, wherein: i. the receiving chamber is located between a clean chamber side and a crude chamber side and communicates with a flow channel running through the rod towards the outside of the rod, and ii. the clean chamber of the filter housing communicates with the receiving chamber by openings provided in the first end disk. ### Claim 4 (depends on 1) A filter device according to claim 1, wherein on each of the first and second end disks, a radially outer circumferential area is provided in each of which the ring filter is configured to abut tightly against the filter housing for forming the filter crude chamber enclosable by sealed areas. ### Claim 5 (depends on 2) A filter device according to claim 2, in each radially outer sealing areas of the end disks, radial sealing rings are provided. ### Claim 6 (depends on 2) A filter device according to claim 2, wherein the at least one connection channel located within the first end disk ends within a radially inner circumferential area of the first end disk in a ring chamber which is located axially between two sealable areas which are sealed with respect to the rod in the operational assembly condition of the filter device. ### Claim 7 (depends on 6) A filter device according to claim 6, wherein the sealable areas provided at the ring filter, between which areas the at least one connection channel exits the respective first end disk radially inwardly, are formed as a sealing contact surface for sealing rings provided at the rod. ### Claim 8 (depends on 1) A filter device according to claim 1, wherein on a clean side of the ring filter, an annular separating element is provided for parts from cleaned liquid. ### Claim 9 (depends on 8) A filter device according to claim 8, wherein: i. the annular separating element is fixedly connected to the second end disk, and ii. in an area of the separating element adjacent to the first end disk, a section is provided which can be tightly abutted with respect to one of the first end disk and the rod. ### Claim 10 (depends on 1) A filter device according to claim 1, wherein the rod with which the filter housing is configured to be connected in a detachable and sealing manner. ### Claim 11 (depends on 10) A filter device according to claim 10, wherein inside the rod, a heating device formed by means of electrical heating elements is provided. ### Claim 12 (depends on 10) A filter device according to claim 10, wherein the filter housing is formed as an irreversibly closed sheet metal cartridge. ### Claim 13 (depends on 10) A filter device according to claim 10, the ring filter being a fuel filter of an internal combustion engine of a motor vehicle, for which the receiving chamber in the filter housing serves as a water collecting chamber for water which is separated on a clean side of the ring filter from cleaned fuel, and the separating element is formed as a water separator. ### Claim 14 (depends on 10) A filter device according to claim 10, where within the rod, a flow channel is provided for discharging of water collected in the receiving chamber. ### Claim 15 (depends on 10) A filter device according to claim 10, wherein between the second end disk and an adjacent axial front side of the filter housing, a first chamber is provided which is separated from a clean side and is connected with a crude side and which communicates with a liquid supply port running through the filter housing and with the inside of the rod. ### Claim 16 (depends on 10) A filter device according to claim 10, wherein between the second end disk and an adjacent axial front side of the filter housing, a second chamber is provided which is separated from a crude side and is connected with a clean side and which communicates with a discharge port running through the filter housing for cleaned liquid. ### Claim 17 (depends on 10) A filter device according to claim 10, wherein the crude and clean chamber are functionally interchangeable. ### Claim 18 (depends on 2) A filter device according to claim 2, wherein: i. the receiving chamber is located between a clean chamber side and a crude chamber side and communicates with a flow channel running through the rod towards the outside of the rod, and ii. the clean chamber of the filter housing communicates with the receiving chamber by openings provided in the first end disk. ### Claim 19 (depends on 2) A filter device according to claim 2, wherein on each of the first and second end disks, a radially outer circumferential area is provided in each of which the ring filter is configured to abut tightly against the filter housing for forming the filter crude chamber enclosable by sealed areas. ### Claim 20 (depends on 2) A filter device according to claim 2, in each radially outer sealing areas of the end disks, radial sealing rings are provided.