WO2001052973A1 - Air dryer cartridge with coalescing filter - Google Patents

Air dryer cartridge with coalescing filter Download PDF

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Publication number
WO2001052973A1
WO2001052973A1 PCT/US2001/001581 US0101581W WO0152973A1 WO 2001052973 A1 WO2001052973 A1 WO 2001052973A1 US 0101581 W US0101581 W US 0101581W WO 0152973 A1 WO0152973 A1 WO 0152973A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
oil
compressed air
air dryer
inlet
Prior art date
Application number
PCT/US2001/001581
Other languages
French (fr)
Inventor
Richard J. Conklin
Original Assignee
Bendix Commercial Vehicle Systems Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bendix Commercial Vehicle Systems Llc filed Critical Bendix Commercial Vehicle Systems Llc
Publication of WO2001052973A1 publication Critical patent/WO2001052973A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/106—Ring-shaped filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/003—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid
    • B01D46/0031—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid with collecting, draining means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/261—Drying gases or vapours by adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/002—Air treatment devices
    • B60T17/004—Draining and drying devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20—Shape of filtering material
    • B01D2275/201—Conical shape

Definitions

  • This invention relates to a compressed air brake system, and more particularly to an air dryer assembly used to remove materials entrained in the air.
  • Trucks, buses, and related heavy-duty vehicles typically employ an air brake system in which compressed air from a source, or storage reservoir, is selectively applied and released from brake chambers associated with the wheels. Since moisture can adversely effect operation of the pumping system, it is important to control the moisture content of the compressed air. For this reason, air dryers are commonly used to remove the moisture from the compressed air.
  • the air dryer usually includes a desiccant material, such as desiccant beads, enclosed in a cartridge chamber through which compressed air is introduced. The desiccant material adsorbs the moisture and a reversed, purge flow through the desiccant bed removes the adsorbed moisture from the desiccant bed to atmosphere.
  • the air compressor associated with the brake systems is oil lubricated and even though seals are provided, oil vapor is introduced into the compressed air.
  • the air dryer also filters the oil vapor from the air stream.
  • the oil collects on the desiccant beads or other active drying media. Even though the desiccant material is periodically regenerated by the purge flow, the oil collects on the desiccant beads causing a gradual loss of the drying function over time. As a result, the desiccant material must be periodically replaced to restore or achieve like-new performance .
  • the present invention contemplates a new and improved compressed air dryer assembly that overcomes the noted problems and others and provides a simple, economical solution that increases the useful life of a desiccant material .
  • An exemplary embodiment of the invention includes a housing having an inlet and an outlet communicating with an internal chamber. A desiccant material is received in the chamber between the inlet and outlet to remove moisture from the compressed air. An oil filter is disposed in the housing adjacent the inlet for removing oil vapor from the compressed air prior to the air passing through the desiccant material .
  • a check valve is associated with the filter for permitting the captured oil to be removed during a purge cycle .
  • the filter is angled relative to horizontal so that oil captured on the filter is gravity-fed toward a purge flow outlet.
  • FIGURE 1 is an elevational view, partly in cross- section, of a preferred embodiment of the invention.
  • FIGURE 2 is an elevational view, partly in cross- section, of a second preferred embodiment of the invention.
  • FIGURE 3 is an enlarged cross-sectional view of a preferred filter structure.
  • the FIGURES show an air dryer A for a compressed air brake system. More particularly, the air dryer includes an outer cartridge housing or shell 10 having a generally cylindrical sidewall portion 12 that merges into an end wall 14 having a generally domed configuration. The opposite end of the shell is open and adapted to receive various components of the air dryer assembly.
  • the desiccant material is a well-known material used in air dryers for compressed air brake systems and typically comprises beads which together define a bed through which compressed air flows and from which moisture is removed and entrained on the beads. A reverse or purge airflow through the desiccant bed removes the moisture from the beads and exhausts to atmosphere to periodically regenerate the air dryer for subsequent use.
  • a cup-shaped housing 30 is received in the cartridge shell for enclosing the desiccant material between the housing and shell.
  • the housing includes a central cylindrical portion 32, having an open end or tower 34 that faces into the shell chamber 18.
  • a lower surface of the central region includes a series of openings defining an outlet 38.
  • the desiccant beads extend into the central portion of the housing to extend the flow path of the air through the air dryer maximize air contact with the desiccant material.
  • a filter preferably defined by a felt or polypropylene mat 40 is disposed in covering relation with the outlet openings 38. Since the housing and the filter are both formed of plastic materials, they are preferably heat sealed together to prevent the desiccant beads from exiting the housing and shell.
  • the housing further includes an annular outer cup portion defined by concentric inner and outer walls 52, 54 respectively.
  • a base or lower wall 56 interconnects these walls and includes a series of openings 58 that collectively define an inlet for the passage of air into the chamber.
  • a biasing member or spring 60 urges the housing into the cartridge shell and provides a desired compression on the desiccant beads.
  • a flexible or sliding seal 62 precludes direct airflow from the inlet to the outlet and thus requires the air to enter the inlet, pass through the desiccant material and exit via the outlet during a normal cycle mode.
  • the present invention incorporates a coalescing or oil vapor filter 70 into the assembly. It is formed from a material such as a layered fiber or fibrous mat, that fits between tapping plate 72 and an inner tube 74 of the air dryer. As air proceeds toward the inlet 58 of the cartridge shell, the conically shaped filter moves or pivots about its inner leg 76 into covering relation with the openings of the inlet.
  • the inner leg if desired, can be integrally formed with the sliding seal 62 or be formed as a separate component. In either situation, the leg secures the filter into position and precludes air flow around the inner diameter region of the coalescing filter.
  • the filter advantageously removes the oil vapor from the incoming airstream.
  • the filter is slightly modified. it does not include an elongated leg allowing it to pivot relative to the opening 58. Instead, the oil vapor filter is tack welded or secured at radially inner and outer edges to the housing as represented by reference numeral 80. Since the filter is angled relative to horizontal, any oil that is collected on the surface will migrate toward the outer radial region of the cartridge housing. There, it will coalesce and the reverse, or purge, flow will remove it from the housing.
  • FIGURE 3 illustrates in greater detail the structure of the filter 70.
  • a central fibrous mat 82 is preferably supported on opposite faces by support screens 86, 88. This support ensures that the pressure differential generated by the filter media does not deform or damage the filter.
  • the coalescing filter media is sized and formed so that oil vapor is captured in the media. Due to the conical shape and gravity, the oil captured by the media drains to the outside of the cone where low-differential check valves open during the purge mode of the dryer to allow the captured oil to escape the filter and subsequently the cartridge, thereby cleansing the filter. In the version of FIGURE 2, no flap or valves are required, but the structure still relies on gravity to drain the oil from the outer edges of the media to be expelled by the flow of purged air.
  • the present invention effectively removes the oil from the airstream prior to entering the desiccant bed. The oil is removed during the dryer purge mode by gravity and the flow of purged air. In this manner, the desiccant material is protected from the harmful effects of oil, resulting in greater life and dryer system air.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Drying Of Gases (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

An air dryer for a compressed air truck brake system includes an oil filter received in the housing adjacent the inlet for removing oil vapor from the compressed air prior to passing through the desiccant material. The coalescing, conical filter assures that all the air must pass through the filter in a charge mode and any oil captured by the filter drains to the outside of the cone where low-differential check valves open during a purge mode of the dryer to allow the captured oil to escape the filter and subsequently the cartridge, thereby cleansing the filter. In an embodiment that does not incorporate the check valve arrangement, gravity still drains the captured oil from the outer edges of the media where it is ultimately expelled by the flow of purge air.

Description

AIR DRYER CARTRIDGE WITH COALESCING FILTER
Background of the Invention
Field of the Invention:
This invention relates to a compressed air brake system, and more particularly to an air dryer assembly used to remove materials entrained in the air.
Trucks, buses, and related heavy-duty vehicles typically employ an air brake system in which compressed air from a source, or storage reservoir, is selectively applied and released from brake chambers associated with the wheels. Since moisture can adversely effect operation of the pumping system, it is important to control the moisture content of the compressed air. For this reason, air dryers are commonly used to remove the moisture from the compressed air. The air dryer usually includes a desiccant material, such as desiccant beads, enclosed in a cartridge chamber through which compressed air is introduced. The desiccant material adsorbs the moisture and a reversed, purge flow through the desiccant bed removes the adsorbed moisture from the desiccant bed to atmosphere.
The air compressor associated with the brake systems is oil lubricated and even though seals are provided, oil vapor is introduced into the compressed air. The air dryer also filters the oil vapor from the air stream. The oil collects on the desiccant beads or other active drying media. Even though the desiccant material is periodically regenerated by the purge flow, the oil collects on the desiccant beads causing a gradual loss of the drying function over time. As a result, the desiccant material must be periodically replaced to restore or achieve like-new performance .
Accordingly, a need exists for an improved compressed air dryer assembly that results in greater life and dryer system air by protecting against the harmful effects of oil vapor.
Summary of the Invention The present invention contemplates a new and improved compressed air dryer assembly that overcomes the noted problems and others and provides a simple, economical solution that increases the useful life of a desiccant material . /An exemplary embodiment of the invention includes a housing having an inlet and an outlet communicating with an internal chamber. A desiccant material is received in the chamber between the inlet and outlet to remove moisture from the compressed air. An oil filter is disposed in the housing adjacent the inlet for removing oil vapor from the compressed air prior to the air passing through the desiccant material .
According to another aspect of an exemplary embodiment, a check valve is associated with the filter for permitting the captured oil to be removed during a purge cycle .
According to yet another aspect of the invention, the filter is angled relative to horizontal so that oil captured on the filter is gravity-fed toward a purge flow outlet.
Still other advantages and benefits of the invention will become apparent to those skilled in the art upon a reading an understanding of the following detailed description.
Brief Description of the Drawings The invention may take physical form in certain parts and arrangements of parts, the preferred embodiments of which are described in this specification and illustrated in the accompanying drawings . FIGURE 1 is an elevational view, partly in cross- section, of a preferred embodiment of the invention.
FIGURE 2 is an elevational view, partly in cross- section, of a second preferred embodiment of the invention. FIGURE 3 is an enlarged cross-sectional view of a preferred filter structure.
Detailed Description of the Preferred Embodiments
Referring now to the drawings which illustrate exemplary embodiments of the invention only, and are not intended to limit the invention, the FIGURES show an air dryer A for a compressed air brake system. More particularly, the air dryer includes an outer cartridge housing or shell 10 having a generally cylindrical sidewall portion 12 that merges into an end wall 14 having a generally domed configuration. The opposite end of the shell is open and adapted to receive various components of the air dryer assembly.
Received in an internal cavity or chamber 18 defined by the cartridge shell is a desiccant material 20. The desiccant material is a well-known material used in air dryers for compressed air brake systems and typically comprises beads which together define a bed through which compressed air flows and from which moisture is removed and entrained on the beads. A reverse or purge airflow through the desiccant bed removes the moisture from the beads and exhausts to atmosphere to periodically regenerate the air dryer for subsequent use.
A cup-shaped housing 30 is received in the cartridge shell for enclosing the desiccant material between the housing and shell. The housing includes a central cylindrical portion 32, having an open end or tower 34 that faces into the shell chamber 18. A lower surface of the central region includes a series of openings defining an outlet 38. As will be appreciated, the desiccant beads extend into the central portion of the housing to extend the flow path of the air through the air dryer maximize air contact with the desiccant material. A filter, preferably defined by a felt or polypropylene mat 40 is disposed in covering relation with the outlet openings 38. Since the housing and the filter are both formed of plastic materials, they are preferably heat sealed together to prevent the desiccant beads from exiting the housing and shell.
The housing further includes an annular outer cup portion defined by concentric inner and outer walls 52, 54 respectively. A base or lower wall 56 interconnects these walls and includes a series of openings 58 that collectively define an inlet for the passage of air into the chamber. A biasing member or spring 60 urges the housing into the cartridge shell and provides a desired compression on the desiccant beads. A flexible or sliding seal 62 precludes direct airflow from the inlet to the outlet and thus requires the air to enter the inlet, pass through the desiccant material and exit via the outlet during a normal cycle mode.
The present invention incorporates a coalescing or oil vapor filter 70 into the assembly. It is formed from a material such as a layered fiber or fibrous mat, that fits between tapping plate 72 and an inner tube 74 of the air dryer. As air proceeds toward the inlet 58 of the cartridge shell, the conically shaped filter moves or pivots about its inner leg 76 into covering relation with the openings of the inlet. The inner leg, if desired, can be integrally formed with the sliding seal 62 or be formed as a separate component. In either situation, the leg secures the filter into position and precludes air flow around the inner diameter region of the coalescing filter. The filter advantageously removes the oil vapor from the incoming airstream. As noted above, this is critical since the oil vapor otherwise coats the desiccant material and ultimately deteriorates the moisture retaining qualities of the desiccant. In this arrangement, however, the oil vapor is removed from the air stream before it reaches the desiccant material . As illustrated in FIGURE 1, a flow in the opposite direction, i.e., a purge flow, will lift the filter from its seated relation with the opening (push the outer diameter portion of the filter from the housing) and exit the cartridge shell. Any oil that is collected on the surface of the filter will be removed by the purge flow and directed out of the air brake system.
In FIGURE 2, the filter is slightly modified. it does not include an elongated leg allowing it to pivot relative to the opening 58. Instead, the oil vapor filter is tack welded or secured at radially inner and outer edges to the housing as represented by reference numeral 80. Since the filter is angled relative to horizontal, any oil that is collected on the surface will migrate toward the outer radial region of the cartridge housing. There, it will coalesce and the reverse, or purge, flow will remove it from the housing. FIGURE 3 illustrates in greater detail the structure of the filter 70. A central fibrous mat 82 is preferably supported on opposite faces by support screens 86, 88. This support ensures that the pressure differential generated by the filter media does not deform or damage the filter.
The coalescing filter media is sized and formed so that oil vapor is captured in the media. Due to the conical shape and gravity, the oil captured by the media drains to the outside of the cone where low-differential check valves open during the purge mode of the dryer to allow the captured oil to escape the filter and subsequently the cartridge, thereby cleansing the filter. In the version of FIGURE 2, no flap or valves are required, but the structure still relies on gravity to drain the oil from the outer edges of the media to be expelled by the flow of purged air. The present invention effectively removes the oil from the airstream prior to entering the desiccant bed. The oil is removed during the dryer purge mode by gravity and the flow of purged air. In this manner, the desiccant material is protected from the harmful effects of oil, resulting in greater life and dryer system air.
The invention has been described with reference to the preferred embodiments. Modifications and alterations will occur to others upon a reading and understanding of the present invention. This application is intended to include all such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof .

Claims

Having thus described the invention, it is now claimed:
1. An air dryer for a truck brake system comprising: a housing having an inlet and an outlet communicating with an internal chamber; a desiccant material received in the housing between the inlet and outlet for removing moisture from compressed air delivered through the housing; and an oil filter received in the housing adjacent the inlet for removing oil vapor from compressed air prior to passing through the desiccant material.
2. The air dryer of claim 1 wherein the oil filter is disposed upstream of the inlet.
3. The air dryer of claim 1 wherein the oil filter extends across the entire inlet so that all of the air must pass through the oil filter before entering the desiccant material.
4. The air dryer of claim 1 wherein the oil filter includes at least one one-way valve disposed therein for cleaning the filter of captured oil during a purge mode.
5. The air dryer of claim 1 wherein the oil filter includes a fibrous mat.
6. The air dryer of claim 1 wherein the oil filter includes a support structure abutting the fibrous mat.
7. The air dryer of claim 6 wherein the support structure includes first and second screens disposed on opposite faces of the fibrous mat.
8. The air dryer of claim 7 wherein the oil filter is fixedly secure to the housing.
9. The air dryer of claim 1 wherein the oil filter is fixedly secured to the housing.
10. The air dryer of claim 1 wherein the oil filter is mounted at an angle relative to horizontal so that oil captured thereon is gravity-fed toward a purge flow outlet.
11. A compressed air dryer comprising: a cartridge shell having an open end receiving a housing therein, the housing having an inlet and outlet communicating with a chamber defined between the cartridge shell and the housing; a desiccant media received in the chamber for removing moisture from compressed air proceeding from the inlet, through the chamber, and to the outlet; and a generally conical oil vapor filter received in the cartridge shell upstream of the inlet for removing oil vapor from the compressed air before the compressed air reaches the desiccant media.
12. The compressed air dryer of claim 11 wherein the generally conical filter is oriented in the cartridge shell along a slope so that oil collected in the filter is directed toward an outlet during urging flow.
13. The compressed air dryer of claim 12 further comprising a low differential check valve in the filter that opens during a purge flow to remove oil collected on the filter from the cartridge shell.
14. The compressed air dryer of claim 11 further comprising a check in the filter that opens during a purge flow directed from the outlet toward the inlet to remove oil collected on the filter from the cartridge shell.
15. The compressed air dryer of claim 11 wherein the oil vapor filter covers the entire inlet whereby all air passing from the inlet to the outlet must proceed through the oil vapor filter.
16. The compressed air dryer of claim 11 wherein the oil vapor filter includes a fibrous layer and a support layer secured thereto.
17. A method of removing oil from a compressed air stream in a truck brake system comprising the steps of: passing the compressed air stream through an oil vapor filter; and subsequently passing the compressed air stream through a desiccant material.
18. The method of claim 17 comprising a further step of providing a check valve adjacent the oil filter for passing a purge flow therethrough.
19. The method of claim 17 comprising the further step of orienting the oil vapor filter at an angle relative to horizontal whereby oil collected on the filter migrates via gravity toward a purge outlet.
PCT/US2001/001581 2000-01-20 2001-01-18 Air dryer cartridge with coalescing filter WO2001052973A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US48824800A 2000-01-20 2000-01-20
US09/488,248 2000-01-20

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005051521A1 (en) * 2003-11-28 2005-06-09 Haldex Brake Products Ab A cartridge in an air dryer
WO2006048640A1 (en) * 2004-11-04 2006-05-11 Wabco Automotive Uk Limited Improved air dryer
EP1669125A1 (en) * 2004-12-10 2006-06-14 Haldex Brake Products GmbH Process for the purification of compressed air from the compressed air producing systems of a motor vehicle, and cartridge therefore
US7625436B2 (en) 2003-06-25 2009-12-01 Wabco Gmbh & Co. Ohg Air dryer cartridge
WO2010097614A2 (en) 2009-02-27 2010-09-02 Nano-Porous Systems Limited A fluid separation device
DE102010038064A1 (en) 2010-10-08 2012-04-12 Haldex Brake Products Gmbh Air drying cartridge
EP2465597A2 (en) * 2009-08-11 2012-06-20 Nabtesco Automotive Corporation Structure for an external cover of an air-drying device
JP2013510758A (en) * 2009-11-11 2013-03-28 クノル−ブレムゼ ジステーメ フューア ヌッツファールツォイゲ ゲゼルシャフト ミット ベシュレンクテル ハフツング Air treatment system
DE102013103066A1 (en) * 2013-03-26 2014-10-02 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Air filter cartridge with integrated coalescing filter / coarse dirt filter and desiccant filling
CN104302878A (en) * 2012-02-27 2015-01-21 纳薄特斯克汽车零部件有限公司 Oil separator
CN104641114A (en) * 2012-07-02 2015-05-20 纳薄特斯克汽车零部件有限公司 Oil separator
CN105169898A (en) * 2015-07-10 2015-12-23 浙江诸暨东港液压机械有限公司 Commercial vehicle air dryer vibration regeneration type drying tank
US9656198B2 (en) 2012-02-27 2017-05-23 Nabtesco Automotive Corporation Oil separator
US9890675B2 (en) 2012-05-10 2018-02-13 Nabtesco Automotive Corporation Oil separator
WO2018104152A1 (en) 2016-12-05 2018-06-14 Volvo Truck Corporation An air processing assembly comprising a ptfe based oleophobic membrane and method for drying compressed air for a vehicle
US10082057B2 (en) 2012-02-27 2018-09-25 Nabtesco Automotive Corporation Oil separator

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Cited By (32)

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Publication number Priority date Publication date Assignee Title
US7625436B2 (en) 2003-06-25 2009-12-01 Wabco Gmbh & Co. Ohg Air dryer cartridge
WO2005051521A1 (en) * 2003-11-28 2005-06-09 Haldex Brake Products Ab A cartridge in an air dryer
WO2006048640A1 (en) * 2004-11-04 2006-05-11 Wabco Automotive Uk Limited Improved air dryer
US7727313B2 (en) 2004-11-04 2010-06-01 Wabco Automotive Uk Limited Air dryer
CN101044047B (en) * 2004-11-04 2010-06-30 沃布科汽车（英国）有限公司 Improved air dryer
DE112005002633B4 (en) * 2004-11-04 2015-11-26 Wabco Automotive U.K. Ltd. air dryer
EP1669125A1 (en) * 2004-12-10 2006-06-14 Haldex Brake Products GmbH Process for the purification of compressed air from the compressed air producing systems of a motor vehicle, and cartridge therefore
US7625437B2 (en) 2004-12-10 2009-12-01 Haldex Brake Products Gmbh Cartridge for cleaning compressed air in compressed air supply systems of motor vehicles
WO2010097614A3 (en) * 2009-02-27 2010-11-04 Nano-Porous Systems Limited A fluid separation device
US8845796B2 (en) 2009-02-27 2014-09-30 Nano-Porous Solutions Limited Fluid separation device
WO2010097614A2 (en) 2009-02-27 2010-09-02 Nano-Porous Systems Limited A fluid separation device
EP2465597A2 (en) * 2009-08-11 2012-06-20 Nabtesco Automotive Corporation Structure for an external cover of an air-drying device
EP2465597A4 (en) * 2009-08-11 2013-07-31 Nabtesco Automotive Corp Structure for an external cover of an air-drying device
EP2465597B1 (en) 2009-08-11 2015-01-28 Nabtesco Automotive Corporation Structure for an external cover of an air-drying device
JP2013510758A (en) * 2009-11-11 2013-03-28 クノル−ブレムゼ ジステーメ フューア ヌッツファールツォイゲ ゲゼルシャフト ミット ベシュレンクテル ハフツング Air treatment system
DE102010038064A1 (en) 2010-10-08 2012-04-12 Haldex Brake Products Gmbh Air drying cartridge
EP2455613A2 (en) 2010-10-08 2012-05-23 Haldex Brake Products GmbH Air drying cartridge
DE102010038064B4 (en) * 2010-10-08 2013-02-21 Haldex Brake Products Gmbh Air drying cartridge
US9656198B2 (en) 2012-02-27 2017-05-23 Nabtesco Automotive Corporation Oil separator
US10082057B2 (en) 2012-02-27 2018-09-25 Nabtesco Automotive Corporation Oil separator
CN104302878A (en) * 2012-02-27 2015-01-21 纳薄特斯克汽车零部件有限公司 Oil separator
US10087798B2 (en) 2012-02-27 2018-10-02 Nabtesco Automotive Corporation Oil separator
US9890675B2 (en) 2012-05-10 2018-02-13 Nabtesco Automotive Corporation Oil separator
US10815849B2 (en) 2012-05-10 2020-10-27 Nabtesco Automotive Corporation Oil separator
US9533246B2 (en) 2012-07-02 2017-01-03 Nabtesco Automotive Corporation Oil separator
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