US20040094036A1 - Truck air dryer purge air cleaner - Google Patents

Truck air dryer purge air cleaner Download PDF

Info

Publication number
US20040094036A1
US20040094036A1 US10/256,813 US25681302A US2004094036A1 US 20040094036 A1 US20040094036 A1 US 20040094036A1 US 25681302 A US25681302 A US 25681302A US 2004094036 A1 US2004094036 A1 US 2004094036A1
Authority
US
United States
Prior art keywords
purge
air
air dryer
oil
reservoir
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
US10/256,813
Other versions
US6730143B1 (en
Inventor
Randall Nichols
Jeff Malarik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bendix Commercial Vehicle Systems LLC
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
Assigned to BENDIX COMMERICAL VEHICLE SYSTEMS LLC reassignment BENDIX COMMERICAL VEHICLE SYSTEMS LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MALARIK, JEFF, NICHOLS, RANDALL W.
Application filed by Bendix Commercial Vehicle Systems LLC filed Critical Bendix Commercial Vehicle Systems LLC
Priority to US10/256,813 priority Critical patent/US6730143B1/en
Application granted granted Critical
Publication of US6730143B1 publication Critical patent/US6730143B1/en
Publication of US20040094036A1 publication Critical patent/US20040094036A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE 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
    • B60T17/00Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/002Air treatment devices
    • B60T17/004Draining and drying devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/26Drying gases or vapours
    • B01D53/261Drying gases or vapours by adsorption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/80Water
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/40Further details for adsorption processes and devices
    • B01D2259/40083Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40086Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by using a purge gas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/45Gas separation or purification devices adapted for specific applications
    • B01D2259/4566Gas separation or purification devices adapted for specific applications for use in transportation means

Definitions

  • This invention relates to an air dryer assembly for a compressed air system, such as a compressed air braking system for commercial vehicles, and more specifically to an air dryer with a purge air cleaning cartridge.
  • an air dryer is incorporated into the compressed air system, and likewise an oil filter.
  • the oil filter is able to remove coalesced oil while the air dryer is effective at removing moisture and oil vapor.
  • the compressed air passes through a porous material to collect or coalesce the oil before the compressed air passes through a desiccant material that adsorbs or removes moisture from the compressed air.
  • the desiccant material is periodically purged of its moisture content by a reverse or purge flow of air from a segregated purge volume through the desiccant material.
  • the apparatus is an air dryer which includes a housing having an inlet and outlet that communicate with a cavity having a desiccant material therein.
  • a purge reservoir operatively communicates with the desiccant material cavity for receiving a flow of air purging the desiccant material of moisture before it is introduced to atmosphere.
  • a oil absorbent cartridge is in communication with the purge valve outlet of the air dryer and includes an absorbent material for removing oil from the air purging the desiccant material.
  • Another aspect of the present invention is a method of collecting oil from a flow of air purging the desiccant material of an air dryer.
  • the method includes purging an air dryer with a purge air flow and separating oil from the purge air flow prior to discharging the purge air flow to atmosphere.
  • An optional additional aspect of the method includes recycling the oil collected in the oil absorbent cartridge that is affixed to the purge valve outlet of the air dyer.
  • FIG. 1 is a schematic representation of major components of a compressed air system.
  • FIG. 2 is a cross-sectional illustration of an air dryer assembly incorporating an oil absorbent cartridge.
  • FIG. 3 is a cross-sectional illustration of an air dryer assembly incorporating an oil absorbent cartridge wherein the purge valve is in the actuated position.
  • FIG. 4 is a cross-sectional illustration of a different air dryer assembly incorporating the oil absorbent cartridge of the present invention.
  • FIG. 1 illustrates a compressed air system of the type used, for example in a heavy truck brake system.
  • An air compressor 10 is driven by a vehicle engine (not shown) in a conventional manner. Pressurized air exits the compressor and passes through an air dryer assembly 12 . Moisture, oil and other contaminants are usually removed from the pressurized air before it is stored in reservoirs 14 or distributed to a downstream use, such as air brakes, and bulk offloading equipment, for example, as represented by reference numeral 15 .
  • FIGS. 2 - 4 illustrate that the air dryer 12 includes a housing 16 secured to a base 17 . More particularly, a cover 18 closes the replacement desiccant canister 20 that includes a generally circumferential wall 22 , end wall 24 , and a second end wall 26 .
  • a desiccant bed 28 includes a beaded desiccant material, a portion of which is illustrated at 30 . The desiccant material 30 removes moisture and may remove oil and other contaminants from the pressurized air.
  • Check valve 38 allows compressed air out of the desiccant bed and into a surrounding purge volume 40 defined between housing 18 and circumferential wall 22 .
  • a perforated plate 42 is disposed in the desiccant bed 28 and spring 44 maintains pressure on the plate so that the desiccant beads are loaded to inhibit relative movement among the beads.
  • the end wall 24 may further include a flow restricting orifice 46 that permits restrictive flow of compressed air from the purge volume 40 into the desiccant bed when the pressure in the desiccant bed drops below a predetermined level.
  • Desiccant canister 20 is secured to the housing base plate 17 along wall 22 either by the bolt 47 as shown in FIGS. 2 and 3, a set of corresponding threads 50 and 52 as shown in FIG. 4, or by some other conventional fastening means. In this manner, the desiccant canister can be installed and removed relative to the base by engaging or disengaging the threads 50 and 52 or the bolt 47 .
  • the air dyer assembly 12 may include an oil colescing element such as the colescing oil filters 58 or 59 shown in FIGS. 3 and 4 respectively.
  • a supply air inlet port 62 communicates with the air compressor 10 .
  • Delivery port 64 communicates with reservoir 14 and is controlled by check valve 66 .
  • a control port 68 provides a pressure control signal indicative when the compressor goes offload.
  • a purge control valve 70 is slidably mounted within the base 17 .
  • Purge control valve 70 includes an exhaust valve portion 72 that cooperates with exhaust valve seat 74 and an inlet valve portion 78 that cooperates with valve seat 80 to selectively control communication between the supply port 62 and the passage 76 .
  • the purge control valve 70 moves from a first position illustrated in FIG. 2, where the exhaust port 77 is closed and communication is permitted between supply port 62 and passage 76 , to an actuated position, as illustrated in FIG. 3, in which the valve surface 78 closes against valve seat 80 to terminate communication between the supply port 62 and passage 76 .
  • This movement of the purge control valve 70 opens purge air exhaust port 77 to vent the passage 76 .
  • the purge air exhaust port 77 communicated directly with atmosphere. Additionally, oil vapor traveling through passageway 76 condenses in air reservoir 99 . During the purge cycle of the air dryer 12 , air passes from purge volume 40 through the air dryer and reservoir 99 and carries the condensed oil vapor out through exhaust port 77 to the environment.
  • a purge air cleaner 100 may be added to a conventional air dryer as a new air dyer unit or may be adapted to retrofit existing air dryer assemblies.
  • the purge air cleaner 100 includes a housing 102 having an internal cavity 104 .
  • the cavity is filled with an absorbent material 106 , shown here as a fixed bed of an absorbent material, that retains oil for either safe disposal or solvent extraction.
  • an absorbent material is a material that will absorb, adsorb, retain, entrap, or otherwise remove oil from the purge flow.
  • the absorbent material is hydrophobic, such as melt blown polypropylene, for example, for better oil assimilation.
  • a hydrophobic absorbent material will also reject water, thereby enhancing the oil retention capacity of the absorbent.
  • the material 106 is formed as a porous, fixed bed inside a canister or housing 102 , which is connected to the air dryer purge valve 70 .
  • the absorbent material 106 may be a corrugated sheet or a bed of granulated material.
  • other engineered shapes that channel air uniformly through the bed and enhance air contact with the absorbent can be used.
  • purge air flow that would in the prior art have been directed to atmosphere from the purge valve 70 moved to an actuated position, in which the exhaust valve portion 72 is spaced from its associated seat 74 , is directed through the canister 100 .
  • An exhaust opening 120 allows the cleaned purge air to be directed to atmosphere.
  • the path from the purge valve 70 to the port 120 requires the purge air to flow through the absorbent material 106 . Oil is thereby removed from the purge air before being discharged to the environment.
  • An external threaded region 110 is provided on an extending portion of a retaining member 111 associated with the air dryer 12 .
  • internal threads 112 are provided on a neck region of the purge air cleaner 100 .
  • the purge air cleaner can be easily assembled and removed from the remainder of the air dryer cartridge.
  • the use of a spin-on type arrangement allows the purge air cleaner 100 to be easily removed for inspection, maintenance, or replacement.
  • a purge air cleaner can be provided as original equipment or, in some instances, can be a retrofit arrangement. In either instance, oil is effectively removed from purge air before being discharged to surrounding environment.
  • a spin-on type of cartridge ease of replacement and substitution with a new cartridge can be attained.
  • the entire canister can be removed and replaced by a new cartridge so that solvent extraction, safe disposal, or recycling of the oil is achieved.
  • the purge air cleaner may adopt a wide variety of configurations and be secured to an air dryer in a variety of manners.
  • This invention is intended to include such modifications and alterations in so far as they fall within the scope of the appended claims or the equivalents thereof.

Abstract

Oil entrained in purge air from a vehicle air dryer is directed through a purge air cleaner to remove the oil before discharge of the purge air to the environment. An absorbent material, preferably hydrophobic, is enclosed in the purge air cleaner, which may be safely disposed. Alternatively, oil can be extracted from the absorbent media and thereby recycled. By providing a spin-on type canister, the absorbent media can be easily replaced and serviced.

Description

    BACKGROUND OF THE INVENTION
  • This invention relates to an air dryer assembly for a compressed air system, such as a compressed air braking system for commercial vehicles, and more specifically to an air dryer with a purge air cleaning cartridge. [0001]
  • Commercial vehicles such as trucks, buses, and large commercial vehicles are typically equipped with a compressed air braking system in which the brakes of the vehicle are actuated by compressed air. An air compressor is operated by the vehicle engine and storage reservoirs maintain a quantity of pressurized air for the brakes and other compressed air uses. Moisture and oil are two attendant problems associated with compressed air systems and are particularly problems that can adversely affect brake system operation. [0002]
  • As a result, an air dryer is incorporated into the compressed air system, and likewise an oil filter. The oil filter is able to remove coalesced oil while the air dryer is effective at removing moisture and oil vapor. Typically, the compressed air passes through a porous material to collect or coalesce the oil before the compressed air passes through a desiccant material that adsorbs or removes moisture from the compressed air. The desiccant material is periodically purged of its moisture content by a reverse or purge flow of air from a segregated purge volume through the desiccant material. During normal operation of these pressure swing absorption air dryers, small quantities of water and oil are expelled with the purge air upon each purge cycle. Water that condenses in the air line and is captured by the desiccant and oil present from bypass lubrication in the air compressor cylinders are expelled to atmosphere and the road surface. Oil on a road surface creates a traction hazard during wet weather and is not environmentally favorable. Likewise, since engine oil is used for compressor lubrication, the air dryer purge is an environmental release point for engine oil contaminated with heavy metals. [0003]
  • In known air dryer systems, the desiccant is periodically replaced. “Spin-on” type of canisters or cartridges are particularly desirable since they facilitate maintenance and replacement. In this manner, a desiccant canister is easily removed and substituted with a new canister. [0004]
  • Accordingly, a need exists for a design that addresses the discharge of oil to the environment, and still maintains the ease of maintenance and does not otherwise adversely impact on the operation of the air dryer assembly. [0005]
  • BRIEF SUMMARY OF THE INVENTION
  • A method and apparatus for cleaning purge air from a compressed air system prior to discharging the air to the environment is provided. In one embodiment, the apparatus is an air dryer which includes a housing having an inlet and outlet that communicate with a cavity having a desiccant material therein. A purge reservoir operatively communicates with the desiccant material cavity for receiving a flow of air purging the desiccant material of moisture before it is introduced to atmosphere. In one embodiment, a oil absorbent cartridge is in communication with the purge valve outlet of the air dryer and includes an absorbent material for removing oil from the air purging the desiccant material. [0006]
  • Another aspect of the present invention is a method of collecting oil from a flow of air purging the desiccant material of an air dryer. In one embodiment, the method includes purging an air dryer with a purge air flow and separating oil from the purge air flow prior to discharging the purge air flow to atmosphere. An optional additional aspect of the method includes recycling the oil collected in the oil absorbent cartridge that is affixed to the purge valve outlet of the air dyer.[0007]
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic representation of major components of a compressed air system. [0008]
  • FIG. 2 is a cross-sectional illustration of an air dryer assembly incorporating an oil absorbent cartridge. [0009]
  • FIG. 3 is a cross-sectional illustration of an air dryer assembly incorporating an oil absorbent cartridge wherein the purge valve is in the actuated position. [0010]
  • FIG. 4 is a cross-sectional illustration of a different air dryer assembly incorporating the oil absorbent cartridge of the present invention.[0011]
  • DETAILED DESCRIPTION
  • FIG. 1 illustrates a compressed air system of the type used, for example in a heavy truck brake system. Although the detailed description of this invention describes the invention in specific relation to a compressed air system use in a heavy truck brake system, one skilled in the art should appreciate that the scope of this invention includes compressed air systems used in other vehicles, as well as compressed air systems in general. An [0012] air compressor 10 is driven by a vehicle engine (not shown) in a conventional manner. Pressurized air exits the compressor and passes through an air dryer assembly 12. Moisture, oil and other contaminants are usually removed from the pressurized air before it is stored in reservoirs 14 or distributed to a downstream use, such as air brakes, and bulk offloading equipment, for example, as represented by reference numeral 15.
  • FIGS. [0013] 2-4 illustrate that the air dryer 12 includes a housing 16 secured to a base 17. More particularly, a cover 18 closes the replacement desiccant canister 20 that includes a generally circumferential wall 22, end wall 24, and a second end wall 26. A desiccant bed 28 includes a beaded desiccant material, a portion of which is illustrated at 30. The desiccant material 30 removes moisture and may remove oil and other contaminants from the pressurized air. Check valve 38 allows compressed air out of the desiccant bed and into a surrounding purge volume 40 defined between housing 18 and circumferential wall 22. A perforated plate 42 is disposed in the desiccant bed 28 and spring 44 maintains pressure on the plate so that the desiccant beads are loaded to inhibit relative movement among the beads. As shown in FIG. 4, the end wall 24 may further include a flow restricting orifice 46 that permits restrictive flow of compressed air from the purge volume 40 into the desiccant bed when the pressure in the desiccant bed drops below a predetermined level.
  • [0014] Desiccant canister 20 is secured to the housing base plate 17 along wall 22 either by the bolt 47 as shown in FIGS. 2 and 3, a set of corresponding threads 50 and 52 as shown in FIG. 4, or by some other conventional fastening means. In this manner, the desiccant canister can be installed and removed relative to the base by engaging or disengaging the threads 50 and 52 or the bolt 47.
  • The [0015] air dyer assembly 12 may include an oil colescing element such as the colescing oil filters 58 or 59 shown in FIGS. 3 and 4 respectively.
  • A supply [0016] air inlet port 62 communicates with the air compressor 10. Delivery port 64, on the other hand communicates with reservoir 14 and is controlled by check valve 66. A control port 68 provides a pressure control signal indicative when the compressor goes offload.
  • A [0017] purge control valve 70 is slidably mounted within the base 17. Purge control valve 70 includes an exhaust valve portion 72 that cooperates with exhaust valve seat 74 and an inlet valve portion 78 that cooperates with valve seat 80 to selectively control communication between the supply port 62 and the passage 76. The purge control valve 70 moves from a first position illustrated in FIG. 2, where the exhaust port 77 is closed and communication is permitted between supply port 62 and passage 76, to an actuated position, as illustrated in FIG. 3, in which the valve surface 78 closes against valve seat 80 to terminate communication between the supply port 62 and passage 76. This movement of the purge control valve 70 opens purge air exhaust port 77 to vent the passage 76. In the past, the purge air exhaust port 77 communicated directly with atmosphere. Additionally, oil vapor traveling through passageway 76 condenses in air reservoir 99. During the purge cycle of the air dryer 12, air passes from purge volume 40 through the air dryer and reservoir 99 and carries the condensed oil vapor out through exhaust port 77 to the environment.
  • A [0018] purge air cleaner 100 may be added to a conventional air dryer as a new air dyer unit or may be adapted to retrofit existing air dryer assemblies. The purge air cleaner 100 includes a housing 102 having an internal cavity 104. The cavity is filled with an absorbent material 106, shown here as a fixed bed of an absorbent material, that retains oil for either safe disposal or solvent extraction. It should be understood that an absorbent material is a material that will absorb, adsorb, retain, entrap, or otherwise remove oil from the purge flow. Preferably, the absorbent material is hydrophobic, such as melt blown polypropylene, for example, for better oil assimilation. A hydrophobic absorbent material will also reject water, thereby enhancing the oil retention capacity of the absorbent. In one embodiment, the material 106 is formed as a porous, fixed bed inside a canister or housing 102, which is connected to the air dryer purge valve 70. One skilled in the art will appreciate that other absorbent materials and configurations may be used to remove the oil entrained in the purge air flow. For example, the absorbent material 106 may be a corrugated sheet or a bed of granulated material. Likewise, other engineered shapes that channel air uniformly through the bed and enhance air contact with the absorbent can be used. Thus, purge air flow that would in the prior art have been directed to atmosphere from the purge valve 70 moved to an actuated position, in which the exhaust valve portion 72 is spaced from its associated seat 74, is directed through the canister 100. An exhaust opening 120 allows the cleaned purge air to be directed to atmosphere. The path from the purge valve 70 to the port 120 requires the purge air to flow through the absorbent material 106. Oil is thereby removed from the purge air before being discharged to the environment.
  • An external threaded [0019] region 110 is provided on an extending portion of a retaining member 111 associated with the air dryer 12. Likewise, internal threads 112 are provided on a neck region of the purge air cleaner 100. In this manner, the purge air cleaner can be easily assembled and removed from the remainder of the air dryer cartridge. The use of a spin-on type arrangement allows the purge air cleaner 100 to be easily removed for inspection, maintenance, or replacement.
  • As will be recognized, a purge air cleaner can be provided as original equipment or, in some instances, can be a retrofit arrangement. In either instance, oil is effectively removed from purge air before being discharged to surrounding environment. By using a spin-on type of cartridge, ease of replacement and substitution with a new cartridge can be attained. The entire canister can be removed and replaced by a new cartridge so that solvent extraction, safe disposal, or recycling of the oil is achieved. [0020]
  • It will be appreciated that the purge air cleaner may adopt a wide variety of configurations and be secured to an air dryer in a variety of manners. This invention is intended to include such modifications and alterations in so far as they fall within the scope of the appended claims or the equivalents thereof. [0021]

Claims (25)

What is claimed is:
1. An air dryer assembly for a compressed air system comprising:
a housing having an inlet and an outlet that communicate with a cavity having a desiccant material therein, whereby the desiccant material removes moisture from compressed air passing from the inlet to the outlet, and a purge air flow through the desiccant material removes moisture and oil therefrom; and
a purge air cleaner in operative communication with the desiccant material for receiving the purge air flow.
2. The air dryer assembly of claim 1 wherein the purge air cleaner is mounted adjacent the housing.
3. The air dryer assembly of claim 1 further comprising a purge valve for reversing air flow through the desiccant material from the outlet to the inlet.
4. The air dryer assembly of claim 1 wherein the purge air cleaner further comprises an absorbent material therein for removing oil from the purge flow.
5. The air dryer assembly of claim 4 wherein the absorbent material is hydrophobic.
6. The air dryer assembly of claim 4 wherein the absorbent material is a porous fixed bed.
7. The air dryer assembly of claim 4, wherein said absorbent material is a corrugated sheet material housed within the purge reservoir.
8. The air dryer assembly of claim 1 wherein the purge air cleaner is selectively removable.
9. The air dryer assembly of claim 8 wherein the purge air cleaner further comprises a set of threads for spin-on assembly to and disassembly from said housing.
10. The air dryer assembly of claim 1 wherein the purge air cleaner further comprises a port communicating with the atmosphere.
11. A method of recovering oil from a compressed air system that includes an air dryer having a desiccant material disposed therein, the method comprising the steps of:
purging an air dryer with a purge air flow; and
separating oil from the purge air flow prior to discharging the purge air flow to atmosphere.
12. The method of claim 11, wherein the step of separating oil from the purge air flow is performed by an purge air cleaner.
13. The method of claim 11 comprising the further step of supplying an absorbent material in the purge reservoir to absorb the oil therein.
14. The method of claim 13, wherein said absorbent material is hydrophobic.
15. The method of claim 11 comprising the further step of recycling the oil collected in the purge reservoir.
16. The method of claim 11, wherein said purge reservoir is selectively removable.
17. An air dryer assembly for a compressed air system used on a vehicle, the air dryer assembly comprising:
an air dryer housing having a supply port and a delivery port communicating with a desiccant material stored in the housing for removing moisture and contaminants from compressed air flowing from the supply port to the delivery port;
a valve for providing a purge air flow through the desiccant material whereby moisture and contaminants are removed from the desiccant material by the purge air; and
a reservoir that receives the purge air, wherein oil in the purge air is removed.
18. The air dryer assembly of claim 17, wherein said reservoir removes oil from the purge air prior to is discharge of the purge air to atmosphere.
19. The air dryer assembly of claim 17 wherein the reservoir includes an absorbent material for removing oil from the purge flow.
20. The air dryer assembly of claim 19, wherein the absorbent material is hydrophobic.
21. The air dryer assembly of claim 17 wherein the reservoir is removably mounted to the air dryer housing.
22. A purge air cleaner connectable to an air dryer, the purge reservoir comprising:
an inlet adapted to receive purge air from the air dryer;
an absorbent material disposed in the purge air cleaner, wherein the absorbent material removes oil from the purge air; and
an outlet for discharging the purge air from the purge air cleaner.
23. The purge reservoir of claim 22, wherein the absorbent material is hydrophobic.
24. The purge reservoir of claim 22, wherein said purge reservoir further comprises a set of threads for engaging the air dryer assembly.
25. The purge reservoir of claim 22, wherein said purge reservoir is connected to an air dryer assembly of a commercial vehicle.
US10/256,813 2002-11-18 2002-11-18 Truck air dryer purge air cleaner Expired - Lifetime US6730143B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/256,813 US6730143B1 (en) 2002-11-18 2002-11-18 Truck air dryer purge air cleaner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/256,813 US6730143B1 (en) 2002-11-18 2002-11-18 Truck air dryer purge air cleaner

Publications (2)

Publication Number Publication Date
US6730143B1 US6730143B1 (en) 2004-05-04
US20040094036A1 true US20040094036A1 (en) 2004-05-20

Family

ID=32174499

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/256,813 Expired - Lifetime US6730143B1 (en) 2002-11-18 2002-11-18 Truck air dryer purge air cleaner

Country Status (1)

Country Link
US (1) US6730143B1 (en)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060123743A1 (en) * 2004-12-10 2006-06-15 Haldex Brake Products Gmbh Cartridge for cleaning compressed air in compressed air supply systems of motor vehicles
US20070144350A1 (en) * 2003-05-19 2007-06-28 Wabco Automotive Uk Limited Air dryer cartridge
WO2008017474A1 (en) * 2006-08-08 2008-02-14 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Compressed air supply device
US20080087168A1 (en) * 2006-10-11 2008-04-17 New York Air Brake Corporation Air Dryer with Pre-Filter
US7416586B1 (en) * 2005-10-18 2008-08-26 Rix Industries Filter apparatus for extracting water vapors from a gas
US20090007787A1 (en) * 2006-02-01 2009-01-08 New York Air Brake Corporation Air Dryer for a Brake System
US20090084728A1 (en) * 2007-10-02 2009-04-02 United States Of America As Represented By The Secretary Of The Navy Method for Recovering Potable Water from the Exhaust of an Internal Combustion Engine
US20100089239A1 (en) * 2008-10-13 2010-04-15 New York Air Brake Corporation Membrane air dryer
US20100199844A1 (en) * 2007-03-08 2010-08-12 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Compressed-Air Supply Device and Valve Housing
US20120137887A1 (en) * 2009-08-11 2012-06-07 Nabtesco Automotive Corporation Structure of external cover of air drying appartus
CN102666232A (en) * 2009-11-11 2012-09-12 克诺尔商用车制动系统有限公司 Drying agent cartridge and air treatment system with drying agent cartridge
US20120297985A1 (en) * 2009-11-11 2012-11-29 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Air Treatment System
US8753436B1 (en) * 2010-08-27 2014-06-17 Des-Case Corporation Oil coalescing device
US20150375171A1 (en) * 2014-06-30 2015-12-31 Nabtesco Corporation Dehumidifying device and dehumidifying module
WO2017148778A1 (en) * 2016-03-01 2017-09-08 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Air-dryer cartridge and helical spring for an air-dryer cartridge
CN107387369A (en) * 2017-08-17 2017-11-24 合肥力威汽车油泵有限公司 A kind of gs-oil separator
US20170354917A1 (en) * 2016-06-10 2017-12-14 Schroeder Industries, Llc Compact Desiccant Air Breather with Unidirectional Air Flow
WO2019190876A1 (en) * 2018-03-27 2019-10-03 Bendix Commercial Vehicle Systems Llc Effluent processing apparatus and method for a vehicle air brake charging system
WO2019212740A1 (en) * 2018-04-30 2019-11-07 Bendix Commercial Vehicle Systems Llc Effluent processing apparatus for a vehicle air brake charging system
WO2020123328A1 (en) * 2018-12-10 2020-06-18 Bendix Commercial Vehicle Systems Llc Effluent processing apparatus and method for a vehicle air brake charging system
US10815849B2 (en) 2012-05-10 2020-10-27 Nabtesco Automotive Corporation Oil separator
FR3101434A1 (en) * 2019-09-27 2021-04-02 Aml Systems Interchangeable dehumidification device intended to dehumidify an interior of a closed housing.
EP2821604B1 (en) * 2012-02-27 2022-01-12 Nabtesco Automotive Corporation Oil separator
EP2821605B1 (en) * 2012-02-27 2022-01-12 Nabtesco Automotive Corporation Oil separator
EP4001035A1 (en) * 2020-11-24 2022-05-25 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Desiccant container, air dryer cartridge, air treatment device, and stackable device
EP4140840A1 (en) * 2021-08-31 2023-03-01 ZF CV Systems Europe BV Purge valve for an air-drying device and air-drying device and pressurized air-based system and commercial vehicle

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6923845B2 (en) * 2002-10-18 2005-08-02 Bendix Commercial Vehicle Systems Llc Membrane air dryer for vehicle air brake system
US7100305B2 (en) * 2003-09-27 2006-09-05 Bendix Commerical Vehicle Systems Llc Air dryer mounting assembly
GB0424480D0 (en) * 2004-11-04 2004-12-08 Wabco Automotive Uk Ltd Improved air dryer
GB0509946D0 (en) * 2005-05-16 2005-06-22 Wabco Automotive Uk Ltd Air dryer cartridge
CN2859411Y (en) * 2005-12-12 2007-01-17 瑞立集团有限公司 Air dryer for vehicle
CN2878124Y (en) * 2005-12-12 2007-03-14 瑞立集团瑞安汽车零部件有限公司 Clutch assistor for car
CN2846243Y (en) * 2005-12-12 2006-12-13 瑞立集团有限公司 Inner respiratory type spring brake air chamber
US7544234B2 (en) * 2006-01-26 2009-06-09 Bendix Commercial Vehicle Systems Llc Vehicle air system having an indicator device and method
US7708793B2 (en) * 2007-08-29 2010-05-04 Bendix Commercial Vehicle Systems Llc Purge exhaust processor
CN104689690B (en) * 2009-01-14 2020-01-10 纳博特斯克自动株式会社 Oil suppressing structure in air drying device
US9101856B2 (en) 2012-06-01 2015-08-11 Bendix Commercial Vehicle Systems Llc Purge exhaust processor
US10843112B2 (en) * 2014-08-29 2020-11-24 Nabtesco Automotive Corporation Oil separator and compressed air drying system
EP3018021B1 (en) 2014-10-28 2019-12-04 Parker-Hannificn Corporation Combined oil and water separator in an air brake dryer
US20160236668A1 (en) * 2015-02-12 2016-08-18 Richard Mortvedt Air Dryer Bypass Device and System
JP7091590B2 (en) 2016-04-11 2022-06-28 コブハム・ミッション・システムズ・ダベンポート・エルエスエス・インコーポレイテッド Sheave bed retention system
DE112017005305T5 (en) * 2016-10-21 2019-07-04 Hitachi Automotive Systems, Ltd. Dryer device and air suspension system
US10583820B2 (en) 2017-09-29 2020-03-10 Bendix Commercial Vehicle Systems Llc Effluent processing apparatus and method for a vehicle air brake charging system
US10583382B2 (en) 2017-10-04 2020-03-10 Bendix Commercial Vehicle Systems Llc Effluent processing apparatus for a vehicle air brake charging system
US10583391B2 (en) 2017-12-18 2020-03-10 Bendix Commercial Vehicle Systems Llc Absorbent apparatus for an air dryer purge air cleaner and method of producing the same

Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1423412A (en) * 1918-09-20 1922-07-18 Herman H Garner Air cleaner
US1464741A (en) * 1922-09-25 1923-08-14 Ashley C Bennett Air cleaner
US2036106A (en) * 1934-11-08 1936-03-31 James A Stuard Separator
US2508015A (en) * 1946-09-12 1950-05-16 Leavitt Machine Co Separator blowoff valve
US2970669A (en) * 1957-06-21 1961-02-07 Bergson Gustav Condensing filter
US3214054A (en) * 1963-04-15 1965-10-26 Bastion Blessing Company Locking ring for demountable bowls subjected to pressure
US3318323A (en) * 1964-01-27 1967-05-09 Wilkerson Corp Automatic drain valves
US3364658A (en) * 1966-09-01 1968-01-23 Hollingshead Corp Multi-phase separation unit
US3378993A (en) * 1963-07-03 1968-04-23 Bastian Blessing Co Air line filter
US3418789A (en) * 1965-08-30 1968-12-31 Norgren Co C A Automatic liquid discharge mechanism
US4848989A (en) * 1986-08-29 1989-07-18 Maeda Shell Service Co., Ltd. In-line filter assembly for compressed air
US5002593A (en) * 1989-02-22 1991-03-26 Nippon Air Brake Co., Ltd. Compressed-air dryer
US5286283A (en) * 1993-05-17 1994-02-15 Alliedsignal Inc. Air dryer for compressed air system having a serviceable oil filter
US5385592A (en) * 1992-05-20 1995-01-31 Maeda Limited Filter device for compressed air
US5427609A (en) * 1993-09-14 1995-06-27 Horton Industries, Inc. Device for cleaning and drying compressed gas
US5595588A (en) * 1995-07-24 1997-01-21 Alliedsignal Truck Brake Systems Co. Air dryer cartridge mounting system
US5607500A (en) * 1995-07-05 1997-03-04 Alliedsignal Truck Brake Systems Co. Desiccant air dryer with combined attachment and air flow management component
US5622544A (en) * 1995-07-05 1997-04-22 Alliedsignal Truck Brake Systems Company Air dryer cartridge with filter retainer
US5888259A (en) * 1997-05-22 1999-03-30 Maeda Limited Filter device for compressed air
US6071321A (en) * 1997-11-26 2000-06-06 Westinghouse Air Brake Company E-1 air dryer liquid separator with baffle
US6074462A (en) * 1997-12-18 2000-06-13 Alliedsignal Truck Brake Systems Co. Air dryer reservoir module components
US6076272A (en) * 1998-10-29 2000-06-20 Conklin, Iii; Richard J. Single plate compaction and seal design for a compressed air dryer
US6391098B1 (en) * 1996-09-19 2002-05-21 American Standard International Inc. Air braking system component

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8702072D0 (en) * 1987-01-30 1987-03-04 Bendix Ltd Compressed gas apparatus

Patent Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1423412A (en) * 1918-09-20 1922-07-18 Herman H Garner Air cleaner
US1464741A (en) * 1922-09-25 1923-08-14 Ashley C Bennett Air cleaner
US2036106A (en) * 1934-11-08 1936-03-31 James A Stuard Separator
US2508015A (en) * 1946-09-12 1950-05-16 Leavitt Machine Co Separator blowoff valve
US2970669A (en) * 1957-06-21 1961-02-07 Bergson Gustav Condensing filter
US3214054A (en) * 1963-04-15 1965-10-26 Bastion Blessing Company Locking ring for demountable bowls subjected to pressure
US3378993A (en) * 1963-07-03 1968-04-23 Bastian Blessing Co Air line filter
US3318323A (en) * 1964-01-27 1967-05-09 Wilkerson Corp Automatic drain valves
US3418789A (en) * 1965-08-30 1968-12-31 Norgren Co C A Automatic liquid discharge mechanism
US3364658A (en) * 1966-09-01 1968-01-23 Hollingshead Corp Multi-phase separation unit
US4848989A (en) * 1986-08-29 1989-07-18 Maeda Shell Service Co., Ltd. In-line filter assembly for compressed air
US5002593A (en) * 1989-02-22 1991-03-26 Nippon Air Brake Co., Ltd. Compressed-air dryer
US5385592A (en) * 1992-05-20 1995-01-31 Maeda Limited Filter device for compressed air
US5286283A (en) * 1993-05-17 1994-02-15 Alliedsignal Inc. Air dryer for compressed air system having a serviceable oil filter
US5427609A (en) * 1993-09-14 1995-06-27 Horton Industries, Inc. Device for cleaning and drying compressed gas
US5607500A (en) * 1995-07-05 1997-03-04 Alliedsignal Truck Brake Systems Co. Desiccant air dryer with combined attachment and air flow management component
US5622544A (en) * 1995-07-05 1997-04-22 Alliedsignal Truck Brake Systems Company Air dryer cartridge with filter retainer
US5595588A (en) * 1995-07-24 1997-01-21 Alliedsignal Truck Brake Systems Co. Air dryer cartridge mounting system
US6391098B1 (en) * 1996-09-19 2002-05-21 American Standard International Inc. Air braking system component
US5888259A (en) * 1997-05-22 1999-03-30 Maeda Limited Filter device for compressed air
US6071321A (en) * 1997-11-26 2000-06-06 Westinghouse Air Brake Company E-1 air dryer liquid separator with baffle
US6074462A (en) * 1997-12-18 2000-06-13 Alliedsignal Truck Brake Systems Co. Air dryer reservoir module components
US6076272A (en) * 1998-10-29 2000-06-20 Conklin, Iii; Richard J. Single plate compaction and seal design for a compressed air dryer

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070144350A1 (en) * 2003-05-19 2007-06-28 Wabco Automotive Uk Limited Air dryer cartridge
US7846242B2 (en) * 2003-05-19 2010-12-07 Wabco GmbH & Co. Ohg. Air dryer cartridge
US20060123743A1 (en) * 2004-12-10 2006-06-15 Haldex Brake Products Gmbh Cartridge for cleaning compressed air in compressed air supply systems of motor vehicles
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
US7416586B1 (en) * 2005-10-18 2008-08-26 Rix Industries Filter apparatus for extracting water vapors from a gas
US20090007787A1 (en) * 2006-02-01 2009-01-08 New York Air Brake Corporation Air Dryer for a Brake System
US8147594B2 (en) 2006-02-01 2012-04-03 New York Air Brake Corporation Air dryer for a brake system
WO2008017474A1 (en) * 2006-08-08 2008-02-14 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Compressed air supply device
US20090199522A1 (en) * 2006-08-08 2009-08-13 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Compressed Air Supply Device
US20090199523A1 (en) * 2006-08-08 2009-08-13 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Compressed Air Supply Device
WO2008017475A1 (en) 2006-08-08 2008-02-14 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Compressed air supply device
US8021465B2 (en) 2006-08-08 2011-09-20 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Compressed air supply device
US7972418B2 (en) 2006-08-08 2011-07-05 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Compressed air supply device
US7833307B2 (en) * 2006-10-11 2010-11-16 New York Air Brake Corporation Air dryer with pre-filter
US20080087168A1 (en) * 2006-10-11 2008-04-17 New York Air Brake Corporation Air Dryer with Pre-Filter
US20100199844A1 (en) * 2007-03-08 2010-08-12 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Compressed-Air Supply Device and Valve Housing
US8246728B2 (en) * 2007-03-08 2012-08-21 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Compressed-air supply device and valve housing
US8021542B2 (en) * 2007-10-02 2011-09-20 The United States Of America As Represented By The Secretary Of The Navy Method for recovering potable water from the exhaust of an internal combustion engine
US20090084728A1 (en) * 2007-10-02 2009-04-02 United States Of America As Represented By The Secretary Of The Navy Method for Recovering Potable Water from the Exhaust of an Internal Combustion Engine
US20100089239A1 (en) * 2008-10-13 2010-04-15 New York Air Brake Corporation Membrane air dryer
US8231699B2 (en) 2008-10-13 2012-07-31 New York Air Brake Corporation Membrane air dryer
US20120137887A1 (en) * 2009-08-11 2012-06-07 Nabtesco Automotive Corporation Structure of external cover of air drying appartus
US8540809B2 (en) * 2009-08-11 2013-09-24 Nabtesco Automotive Corporation Structure of external cover of air drying apparatus
US20120297985A1 (en) * 2009-11-11 2012-11-29 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Air Treatment System
US20120312171A1 (en) * 2009-11-11 2012-12-13 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Drying Agent Cartridge and Air Treatment System With Drying Agent Cartridge
CN102666232A (en) * 2009-11-11 2012-09-12 克诺尔商用车制动系统有限公司 Drying agent cartridge and air treatment system with drying agent cartridge
US8821620B2 (en) * 2009-11-11 2014-09-02 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Drying agent cartridge and air treatment system with drying agent cartridge
US8834616B2 (en) * 2009-11-11 2014-09-16 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Air treatment system
US8753436B1 (en) * 2010-08-27 2014-06-17 Des-Case Corporation Oil coalescing device
US11007463B1 (en) 2010-08-27 2021-05-18 Des-Case Corporation Oil coalescing device
EP2821605B1 (en) * 2012-02-27 2022-01-12 Nabtesco Automotive Corporation Oil separator
EP2821604B1 (en) * 2012-02-27 2022-01-12 Nabtesco Automotive Corporation Oil separator
US10815849B2 (en) 2012-05-10 2020-10-27 Nabtesco Automotive Corporation Oil separator
US20150375171A1 (en) * 2014-06-30 2015-12-31 Nabtesco Corporation Dehumidifying device and dehumidifying module
US9751048B2 (en) * 2014-06-30 2017-09-05 Nabtesco Corporation Dehumidifying device and dehumidifying module
RU2709695C1 (en) * 2016-03-01 2019-12-19 Кнорр-Бремзе Зюстеме Фюр Нутцфарцойге Гмбх Air dryer cartridge and a helical spring for an air dryer cartridge
US11007992B2 (en) 2016-03-01 2021-05-18 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Air-dryer cartridge and helical spring for an air-dryer cartridge
WO2017148778A1 (en) * 2016-03-01 2017-09-08 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Air-dryer cartridge and helical spring for an air-dryer cartridge
US10786777B2 (en) * 2016-06-10 2020-09-29 Schroeder Industries, Llc Compact desiccant air breather with unidirectional air flow
US20170354917A1 (en) * 2016-06-10 2017-12-14 Schroeder Industries, Llc Compact Desiccant Air Breather with Unidirectional Air Flow
CN107387369A (en) * 2017-08-17 2017-11-24 合肥力威汽车油泵有限公司 A kind of gs-oil separator
US10807582B2 (en) 2018-03-27 2020-10-20 Bendix Commercial Vehicle Systems Llc Effluent processing apparatus and method for a vehicle air brake charging system
WO2019190876A1 (en) * 2018-03-27 2019-10-03 Bendix Commercial Vehicle Systems Llc Effluent processing apparatus and method for a vehicle air brake charging system
US10933351B2 (en) 2018-04-30 2021-03-02 Bendix Commercial Vehicle Systems Llc Effluent processing apparatus for a vehicle air brake charging system
WO2019212740A1 (en) * 2018-04-30 2019-11-07 Bendix Commercial Vehicle Systems Llc Effluent processing apparatus for a vehicle air brake charging system
WO2020123328A1 (en) * 2018-12-10 2020-06-18 Bendix Commercial Vehicle Systems Llc Effluent processing apparatus and method for a vehicle air brake charging system
FR3101434A1 (en) * 2019-09-27 2021-04-02 Aml Systems Interchangeable dehumidification device intended to dehumidify an interior of a closed housing.
EP4001035A1 (en) * 2020-11-24 2022-05-25 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Desiccant container, air dryer cartridge, air treatment device, and stackable device
WO2022111984A1 (en) * 2020-11-24 2022-06-02 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Desiccant container, air dryer cartridge, air treatment device, and stackable device
EP4140840A1 (en) * 2021-08-31 2023-03-01 ZF CV Systems Europe BV Purge valve for an air-drying device and air-drying device and pressurized air-based system and commercial vehicle

Also Published As

Publication number Publication date
US6730143B1 (en) 2004-05-04

Similar Documents

Publication Publication Date Title
US6730143B1 (en) Truck air dryer purge air cleaner
AU747291B2 (en) Twin tower air dryer
US3464186A (en) Dryer for compressed fluid systems
US7097696B2 (en) Dual cartridge air dryer with oil separator and readily changeable valves
US6951581B2 (en) Spin-on desiccant cartridge with integral oil removal filter
JP6373757B2 (en) Compressed air dryer
US7857882B1 (en) Water and oil mist elimination apparatus for a vehicular compressed air storage system
US20030209141A1 (en) Air drying apparatus and method
AU740889B2 (en) Shuttle valve for twin tower air dryer
JP2005066470A (en) Cleaning equipment of compressed air for vehicle
US7625436B2 (en) Air dryer cartridge
US6881245B2 (en) Membrane air dryer and method of mounting a membrane dryer to a vehicle
EP1839728B1 (en) Air dryer cartridge
CN1327937C (en) Spin-on dessicant cartridge with integral oil removal filter
JPH0676798U (en) Air dryer equipment
JPH09253436A (en) Device for removing oil-water contained in compressed air
JPH11169643A (en) Air supplying apparatus
CA2591726C (en) Air dryer with oil removal filter
JPH0664713U (en) Dehumidifier
JPH0526136U (en) Air dryer desiccant replacement time display device

Legal Events

Date Code Title Description
AS Assignment

Owner name: BENDIX COMMERICAL VEHICLE SYSTEMS LLC, OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NICHOLS, RANDALL W.;MALARIK, JEFF;REEL/FRAME:013345/0528

Effective date: 20020920

STCF Information on status: patent grant

Free format text: PATENTED CASE

CC Certificate of correction
FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12