# US 9,751,031 B2 · Filter device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,751,031 B2 - Document ID: US9751031B2 - Status: Granted - Kind: B2 - Application number: 13/261,693 - Filed: 2011-11-19 - Published: 2013-11-07 - Granted: 2017-09-05 - Earliest claimed: 2011-01-15 - Assignees: Hydac Filtertechnik GmbH - Applicants: Richard Eberle; Micha Kreibig; Thomas Scholl; Markus Dewes; Sven Brall - Inventors: Richard Eberle; Micha Kreibig; Thomas Scholl; Markus Dewes; Sven Brall - Web page: https://patentgrep.com/patent/US9751031B2 ## CPC - F02M 37/24: characterised by water separating means - B01D 29/58: arranged concentrically or coaxially - B01D 35/005: {Filters specially adapted for use in internal-combustion engine lubrication or fuel systems} - B01D 35/30: Filter housing constructions - B01D 35/306: {Filter mounting adapter} - B01D 36/006: {Purge means} - F02M 37/42: Installation or removal of filters - B01D 2201/295: with projections extending in a radial outward direction, e.g. for use as a guide, spacing means - B01D 2201/309: Housings with transparent parts - B01D 2201/34: Seals or gaskets for filtering elements - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - 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 filter device, in particular for fluids contaminated with water admixtures, such as diesel oil, has a filter housing (1) holding at least one filter element (9). The filter medium of the filter element separates an untreated side (13) from a treated side (19) during the filtration process in the filter housing (1). A water collecting unit (5) is provided and holds separated water on the untreated side. Water separated on the untreated side (13) also reaches the collecting unit (5). Mutually separated collecting chambers (61, 67) are present in the collecting unit (5) for the water discharged at the treated side (19) and at the untreated side (13). ## Claims ### Claim 1 A filter device for fluids contaminated with water admixture, comprising: a filter housing having an element receptacle therein, said element receptacle having an upwardly projecting receiving pipe connection; a filter element being in said filter housing on said element receptacle, having a filter medium separating an untreated side thereof from a treated side thereof during filtration and having an end cap with a central pipe support projecting therefrom, said central pipe support being received in said receiving pipe connection; a water collecting unit in said filter housing having separated first and second collecting chambers receiving water discharged on said treated side and said untreated side, respectively, said first collecting chamber being inside said second collecting chamber, said first collecting chamber including a hollow cylinder closed on a base side thereof and open on an upper end thereof, an end edge of said upper end being connected to said element receptacle by a first sealing ring connected to a lower end edge of receiving pipe connection; and sealing rings between said central pipe support and said receiving pipe connection providing a sealed connection therebetween. ### Claim 2 (depends on 1) A filter device according to claim 1 wherein said first and second collecting chambers are separate from one another in a fluid-proof manner. ### Claim 3 (depends on 1) A filter device according to claim 1 wherein a coalescor is adjacent said treated side to separate water on said treated side; and a gravitational effect separates water on said treated side. ### Claim 4 (depends on 1) A filter device according to claim 1 wherein said untreated side is on an outer side of said filter medium adjacent a side wall of said filter housing; and said treated side is on an inside of said filter medium defining an inner filter cavity; whereby, during filtration, fluid flows from the untreated side to the treated side and into the inner filter cavity, and water separated on the treated side flows into said first collecting chamber. ### Claim 5 (depends on 1) A filter device according to claim 1 wherein a separating element separates a main part of said filter housing receiving a bottom end of said filter element from said first and second collecting chambers. ### Claim 6 (depends on 1) A filter device according to claim 1 wherein said separating element comprises a central opening aligned with a longitudinal axis of an inner filter cavity surrounded by said treated side to discharge water separated on said treated side into said first collecting chamber and comprises at least one passageway radially offset relative to said central opening to discharge water separated on said untreated side into said second collecting chamber. ### Claim 7 (depends on 1) A filter device according to claim 1 wherein a circumferential annular gap extends between an inner wall of said filter housing and a base-side end region of said filter element to convey water from said untreated side into said second collecting chamber. ### Claim 8 (depends on 1) A filter device according to claim 1 wherein a bottom end of said filter medium adjacent said water collecting unit is framed by said end cap, said element receptacle including a central opening conveying water from said treated side and providing a separator with a wall part extending between said central opening and a side wall of said filter housing, passageways in said wall part conveying water from said untreated side. ### Claim 9 (depends on 8) A filter device according to claim 8, wherein said wall part is adjacent to an annular body of said filter housing protruding downwardly and forming a connection between a main part and a base part of said filter housing with a sealing element located between said annular body and said base part, said wall closing said second collecting chamber. ### Claim 10 (depends on 1) A filter device according to claim 1, wherein said first and second collecting chambers are housed in a base part of said filter housing, said base part having at least one wall part allowing visual detection of at least a filling level of said second collecting chamber. ### Claim 11 (depends on 10) A filter device according to claim 10 wherein a viewer tube extends downward from a base side of said first collecting chamber; and said wall part of said base part and said viewer tube are made of a material transparent to light.