US20110192153A1 - Exhaust after treatment assembly - Google Patents
Exhaust after treatment assembly Download PDFInfo
- Publication number
- US20110192153A1 US20110192153A1 US12/701,094 US70109410A US2011192153A1 US 20110192153 A1 US20110192153 A1 US 20110192153A1 US 70109410 A US70109410 A US 70109410A US 2011192153 A1 US2011192153 A1 US 2011192153A1
- Authority
- US
- United States
- Prior art keywords
- exhaust
- nozzle
- treatment
- unit
- outside air
- 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.)
- Abandoned
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/05—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of air, e.g. by mixing exhaust with air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/20—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having flared outlets, e.g. of fish-tail shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to an exhaust after treatment assembly for an internal combustion engine.
- An exhaust treatment component arrangement for an off-road vehicle such as an agricultural tractor is described in U.S. patent application Ser. No. 11/654,203 filed on 16 Jan. 2007 and assigned to the assignee of the present application.
- This exhaust treatment component arrangement is intended to meet Tier 4 interim emissions standards, which will require all off-highway vehicles to manage Particulate Matter (PM) and NOx levels.
- This exhaust treatment component arrangement includes exhaust after treatment devices, such as both a diesel particulate filter (PDF) and a Diesel Oxidation Catalyst (DOC).
- PDF diesel particulate filter
- DOC Diesel Oxidation Catalyst
- a regeneration process is used with exhaust after treatment devices, wherein soot and particulate matter is burned off and temperatures inside the devices can reach 630 degrees C. Additionally, some of the after treatment device skin temperatures in certain areas can reach temperatures higher than desired. During vehicle operation, and especially during regeneration of such after treatment devices, it is desired to limit the heating of such an exhaust after treatment device.
- an object of this invention is to provide an exhaust after treatment assembly which cools exhaust air which flows therethrough.
- a further object of the invention is to provide such an exhaust after treatment assembly which cools the exhaust after treatment components.
- an exhaust after treatment assembly includes a hollow housing containing at least one exhaust after treatment unit.
- the housing forms a nozzle for directing exhaust gases away from the after treatment unit.
- a shield surrounds and is spaced apart from the housing.
- a venturi unit receives exhaust gases from the nozzle and receives outside air.
- a hood has an inlet end, an outlet end and a tubular portion connecting the inlet end to the outlet end.
- the venturi unit is mounted inside the tubular portion.
- the inlet end is spaced apart from and surrounds an end of the shield and forms an annular gap therebetween.
- the venturi unit draws outside air through the gap, pulls outside air over an exterior of the shield, and mixes the outside air with exhaust gases which have flowed though the after treatment units.
- FIG. 1 is a sectional side view of an exhaust after treatment assembly embodying the invention
- FIG. 2 is a perspective view of the exhaust after treatment assembly of FIG. 1 ;
- FIG. 3 is a sectional view along lines 3 - 3 of FIG. 1 .
- an exhaust after treatment assembly 10 includes a hollow housing 12 which has a cylindrical main portion 14 which contains exhaust after treatment units, such as a diesel oxidation catalyst (DOC) 16 and diesel particulate filter (DPF) 18 .
- Housing 12 has an inlet end 20 which receives engine exhaust gases from an exhaust pipe 21 which is connected to a source of exhaust gases, such as a diesel engine (not shown).
- the inlet end 20 communicates exhaust gases to the after treatment units 16 and 18 .
- Housing 12 also includes an outlet 22 for directing exhaust gases away from the after treatment units 16 and 18 .
- the outlet 22 includes a nozzle 24 and a conical portion 26 which connects the nozzle 24 to an end of the main portion 14 .
- circular band clamps 27 and 28 are mounted around and on the housing 12 .
- a plurality of brackets 29 are attached to the clamps 27 and 28 .
- Brackets 29 support a hollow cylindrical shield 30 which surrounds and is spaced apart from the housing 12 .
- an additional circular band clamp 32 is mounted around the upper end of the housing 12 .
- a plurality of brackets 34 are attached to the clamp 32 .
- Brackets 34 support a hollow hood 40 .
- the hood 40 has a larger diameter inlet end 42 which is adjacent to and spaced apart from a downstream end of the shield 30 , forming an annular gap 43 therebetween.
- the hood 40 also includes a tapered portion 44 which is connected to the inlet end 42 and which surrounds the conical portion 26 and the nozzle 24 of the housing 12 .
- the hood 40 also includes a tubular portion or exhaust pipe 46 which is connected to a downstream end of the tapered portion 44 and extends to an outlet 48 remote from the tapered portion 44 .
- the tubular portion 44 has a venturi unit 50 therein.
- the venturi unit 50 has a larger diameter entry 52 which surrounds and is spaced apart from a downstream end of the nozzle 24 , a smaller diameter neck 54 downstream of the entry 52 , and a larger diameter exit 54 downstream of the neck 54 .
- a circular clamp 52 is mounted on the upper end of the shield 30 , and a plurality of
- the hood 40 is preferably made out of steel which is deep drawn or spun to achieve the desired shape.
- the hood 40 has a bell shape which closely matches the shape of the conical portion 26 and the nozzle 24 of the housing 14 in order to maximize airflow (minimum resistance) and to achieve the desired air volume, pressure, and velocities which optimize resulting exhaust gas temperature.
- the hood 40 also acts as a shield to protect the top of the housing 14 and keeps debris off of the surfaces thereof. Thirdly, the cool air drawn in at the bottom of the hood 40 passes by the top surface of the conical portion 26 and the nozzle 24 , reducing their skin temperatures.
Abstract
The invention relates to an exhaust after treatment assembly. There is a need for such assembly which remains as cool as possible. An exhaust after treatment assembly includes a hollow housing containing an exhaust after treatment unit. The housing forms a nozzle which directs exhaust gases away from the after treatment unit. A shield surrounds and is spaced apart from the housing. A venturi unit receives exhaust gases from the nozzle and receives outside air. The venturi unit pulls outside air over an exterior of the shield and mixes the outside air with exhaust gases flowing though the after treatment unit. The venturi unit is mounted inside a hood which surrounds part of the housing. Outside air is drawn through an annular gap which is formed between an end of the hood and an end of the shield.
Description
- The present invention relates to an exhaust after treatment assembly for an internal combustion engine.
- An exhaust treatment component arrangement for an off-road vehicle such as an agricultural tractor is described in U.S. patent application Ser. No. 11/654,203 filed on 16 Jan. 2007 and assigned to the assignee of the present application. This exhaust treatment component arrangement is intended to meet Tier 4 interim emissions standards, which will require all off-highway vehicles to manage Particulate Matter (PM) and NOx levels. This exhaust treatment component arrangement includes exhaust after treatment devices, such as both a diesel particulate filter (PDF) and a Diesel Oxidation Catalyst (DOC).
- A regeneration process is used with exhaust after treatment devices, wherein soot and particulate matter is burned off and temperatures inside the devices can reach 630 degrees C. Additionally, some of the after treatment device skin temperatures in certain areas can reach temperatures higher than desired. During vehicle operation, and especially during regeneration of such after treatment devices, it is desired to limit the heating of such an exhaust after treatment device.
- Accordingly, an object of this invention is to provide an exhaust after treatment assembly which cools exhaust air which flows therethrough.
- A further object of the invention is to provide such an exhaust after treatment assembly which cools the exhaust after treatment components.
- These and other objects are achieved by the present invention, wherein an exhaust after treatment assembly includes a hollow housing containing at least one exhaust after treatment unit. The housing forms a nozzle for directing exhaust gases away from the after treatment unit. A shield surrounds and is spaced apart from the housing. A venturi unit receives exhaust gases from the nozzle and receives outside air. A hood has an inlet end, an outlet end and a tubular portion connecting the inlet end to the outlet end. The venturi unit is mounted inside the tubular portion. The inlet end is spaced apart from and surrounds an end of the shield and forms an annular gap therebetween. The venturi unit draws outside air through the gap, pulls outside air over an exterior of the shield, and mixes the outside air with exhaust gases which have flowed though the after treatment units.
-
FIG. 1 is a sectional side view of an exhaust after treatment assembly embodying the invention; -
FIG. 2 is a perspective view of the exhaust after treatment assembly ofFIG. 1 ; and -
FIG. 3 is a sectional view along lines 3-3 ofFIG. 1 . - Referring to
FIGS. 1 and 2 , an exhaust aftertreatment assembly 10 includes ahollow housing 12 which has a cylindricalmain portion 14 which contains exhaust after treatment units, such as a diesel oxidation catalyst (DOC) 16 and diesel particulate filter (DPF) 18.Housing 12 has aninlet end 20 which receives engine exhaust gases from anexhaust pipe 21 which is connected to a source of exhaust gases, such as a diesel engine (not shown). Theinlet end 20 communicates exhaust gases to the aftertreatment units Housing 12 also includes anoutlet 22 for directing exhaust gases away from theafter treatment units outlet 22 includes anozzle 24 and aconical portion 26 which connects thenozzle 24 to an end of themain portion 14. - As best seen in
FIG. 1 ,circular band clamps housing 12. A plurality ofbrackets 29 are attached to theclamps Brackets 29 support a hollowcylindrical shield 30 which surrounds and is spaced apart from thehousing 12. As best seen inFIGS. 1 and 3 , an additionalcircular band clamp 32 is mounted around the upper end of thehousing 12. A plurality ofbrackets 34 are attached to theclamp 32.Brackets 34 support ahollow hood 40. - The
hood 40 has a largerdiameter inlet end 42 which is adjacent to and spaced apart from a downstream end of theshield 30, forming anannular gap 43 therebetween. Thehood 40 also includes atapered portion 44 which is connected to theinlet end 42 and which surrounds theconical portion 26 and thenozzle 24 of thehousing 12. Thehood 40 also includes a tubular portion orexhaust pipe 46 which is connected to a downstream end of thetapered portion 44 and extends to anoutlet 48 remote from thetapered portion 44. - The
tubular portion 44 has aventuri unit 50 therein. Theventuri unit 50 has alarger diameter entry 52 which surrounds and is spaced apart from a downstream end of thenozzle 24, asmaller diameter neck 54 downstream of theentry 52, and a larger diameter exit 54 downstream of theneck 54. - As hot exhaust gases flow through the
units nozzle 24 and through theventuri 50, the increased velocity of the exhaust gases creates a pressure drop which pulls outside air into thegap 43 and through the space between thetapered portion 44 of thehood 40 and into theventuri 50. In theventuri 50 this outside air mixes with and cools the exhaust gases. This outside air is also pulled over an exterior of theshield 30, and over the exterior of theconical portion 26 and thenozzle 24, and provides a cooling effect thereon. - As best seen in
FIG. 3 , acircular clamp 52 is mounted on the upper end of theshield 30, and a plurality of - The
hood 40 is preferably made out of steel which is deep drawn or spun to achieve the desired shape. Thehood 40 has a bell shape which closely matches the shape of theconical portion 26 and thenozzle 24 of thehousing 14 in order to maximize airflow (minimum resistance) and to achieve the desired air volume, pressure, and velocities which optimize resulting exhaust gas temperature. - With this design hot exhaust gases exiting the after
treatment units hood 40 also acts as a shield to protect the top of thehousing 14 and keeps debris off of the surfaces thereof. Thirdly, the cool air drawn in at the bottom of thehood 40 passes by the top surface of theconical portion 26 and thenozzle 24, reducing their skin temperatures. - While the present invention has been described in conjunction with a specific embodiment, it is understood that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description.
- Accordingly, this invention is intended to embrace all such alternatives, modifications and variations which fall within the spirit and scope of the appended claims.
Claims (6)
1. An exhaust after treatment assembly, comprising:
a hollow housing containing an exhaust after treatment unit;
a nozzle for directing exhaust gases away from the after treatment unit;
a shield surrounding and spaced apart from the housing; and
a venturi unit receiving exhaust gases from the nozzle and receiving outside air, the venturi unit operating to pull outside air over an exterior of the shield and to mix said outside air with exhaust gases flowing though the after treatment unit.
2. The exhaust after treatment assembly of claim 1 , further comprising:
a hood having an inlet end, an outlet end and a tubular portion connecting the inlet end to the outlet end, the venturi unit being mounted inside the tubular portion, the inlet end being spaced apart from and surrounding an end of the shield and forming an annular gap therebetween, the venturi unit drawing outside air through said gap.
3. The exhaust after treatment assembly of claim 2 , wherein:
the hood comprises a tapered portion connected between the inlet end and the tubular portion.
4. The exhaust after treatment assembly of claim 1 , wherein:
the housing includes a main portion surrounding the after treatment unit and a conical portion connecting the main portion to the nozzle.
5. The exhaust after treatment assembly of claim 1 , wherein:
the venturi unit comprises a larger diameter entry surrounding a downstream end of the nozzle, a smaller diameter neck downstream of the entry and a larger diameter exit downstream of the neck.
6. An exhaust after treatment assembly, comprising:
a hollow housing having a central portion containing an exhaust after treatment unit, an inlet end for communicating engine exhaust gases to the after treatment unit and having an outlet for directing exhaust gases away from the after treatment unit, the outlet having a nozzle and a conical portion connecting the nozzle to an end of the central portion;
a shield surrounding and spaced apart from the central portion of the housing; and
a hood having an inlet end surrounding a downstream end of the shield, a tapered portion connected to the inlet end and surrounding the conical portion and the nozzle, a tubular portion connected to a downstream end of the tapered portion and extending to an outlet remote from the tapered portion; and
the tubular portion having a venturi unit therein, the venturi unit having a larger diameter entry surrounding a downstream end of the nozzle, a smaller diameter neck downstream of the entry and a larger diameter exit downstream of the neck, the venturi operating to pull outside air over an exterior of the shield, over the an exterior of the conical portion and the nozzle and to mix said outside air with exhaust gases flowing though the after treatment unit.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/701,094 US20110192153A1 (en) | 2010-02-05 | 2010-02-05 | Exhaust after treatment assembly |
DE102011003498A DE102011003498A1 (en) | 2010-02-05 | 2011-02-02 | exhaust aftertreatment arrangement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/701,094 US20110192153A1 (en) | 2010-02-05 | 2010-02-05 | Exhaust after treatment assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110192153A1 true US20110192153A1 (en) | 2011-08-11 |
Family
ID=44352599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/701,094 Abandoned US20110192153A1 (en) | 2010-02-05 | 2010-02-05 | Exhaust after treatment assembly |
Country Status (2)
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US (1) | US20110192153A1 (en) |
DE (1) | DE102011003498A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD668691S1 (en) * | 2012-02-01 | 2012-10-09 | Joseph Vögele AG | Cover for an exhaust port of a road construction machine |
USD670743S1 (en) * | 2011-08-01 | 2012-11-13 | Joseph Vögele AG | Exhaust pipe for a road construction machine |
EP2815091A4 (en) * | 2012-02-14 | 2016-01-27 | Deere & Co | Exhaust assembly |
US9309800B2 (en) | 2012-11-30 | 2016-04-12 | Cnh Industrial America Llc | Exhaust system for an off-road vehicle |
US10071626B2 (en) | 2015-04-28 | 2018-09-11 | Cnh Industrial America Llc | Exhaust after-treatment mounting arrangement |
WO2018180028A1 (en) * | 2017-03-30 | 2018-10-04 | ヤンマー株式会社 | Tractor |
US20180355775A1 (en) * | 2015-11-17 | 2018-12-13 | Carrier Corporation | Temperature control of exhaust gas of a transportation refrigeration unit |
USD966343S1 (en) * | 2019-10-16 | 2022-10-11 | Deere & Company | Air intake tower |
USD967199S1 (en) * | 2019-10-16 | 2022-10-18 | Deere & Company | Air intake tower |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022107706A1 (en) * | 2022-03-31 | 2023-10-05 | Deere & Company | Exhaust system for a tractor |
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US2894598A (en) * | 1955-11-14 | 1959-07-14 | Universal Oil Prod Co | Exhaust burning muffler |
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US7937936B2 (en) | 2007-01-16 | 2011-05-10 | Deere & Company | Vehicle exhaust component arrangement |
-
2010
- 2010-02-05 US US12/701,094 patent/US20110192153A1/en not_active Abandoned
-
2011
- 2011-02-02 DE DE102011003498A patent/DE102011003498A1/en not_active Withdrawn
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US2242494A (en) * | 1932-04-07 | 1941-05-20 | Austin M Wolf | Ventilating and cooling system for motor vehicles |
US2501767A (en) * | 1948-03-01 | 1950-03-28 | Fluor Corp | Muffler with internal side branch chamber |
US2894598A (en) * | 1955-11-14 | 1959-07-14 | Universal Oil Prod Co | Exhaust burning muffler |
US4265332A (en) * | 1979-06-21 | 1981-05-05 | Fmc Corporation | Heat extracting muffler system |
US4388804A (en) * | 1981-08-17 | 1983-06-21 | J. I. Case Company | Exhaust assembly for tractors |
US4487289A (en) * | 1982-03-01 | 1984-12-11 | Nelson Industries, Inc. | Exhaust muffler with protective shield |
US5590522A (en) * | 1992-05-25 | 1997-01-07 | Finn Katalyt Oy | Catalytic combustion engine exhaust gas purifier with additional air supply |
US5431013A (en) * | 1993-01-11 | 1995-07-11 | Fuji Jukogyo Kabushiki Kaisha | Engine exhaust apparatus |
US5732555A (en) * | 1994-10-19 | 1998-03-31 | Briggs & Stratton Corporation | Multi-pass catalytic converter |
US6595318B2 (en) * | 1999-03-30 | 2003-07-22 | Daimlerchrysler Ag | Double-walled tail pipe for an exhaust pipe of a motor vehicle exhaust system |
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US20080282668A1 (en) * | 2007-05-14 | 2008-11-20 | Kristos Mavros | Ether propeller |
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Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD670743S1 (en) * | 2011-08-01 | 2012-11-13 | Joseph Vögele AG | Exhaust pipe for a road construction machine |
USD668691S1 (en) * | 2012-02-01 | 2012-10-09 | Joseph Vögele AG | Cover for an exhaust port of a road construction machine |
EP2815091A4 (en) * | 2012-02-14 | 2016-01-27 | Deere & Co | Exhaust assembly |
US9309800B2 (en) | 2012-11-30 | 2016-04-12 | Cnh Industrial America Llc | Exhaust system for an off-road vehicle |
US10071626B2 (en) | 2015-04-28 | 2018-09-11 | Cnh Industrial America Llc | Exhaust after-treatment mounting arrangement |
US10427517B2 (en) | 2015-04-28 | 2019-10-01 | Cnh Industrial America Llc | Exhaust after-treatment mounting arrangement |
US10704438B2 (en) * | 2015-11-17 | 2020-07-07 | Carrier Corporation | Temperature control of exhaust gas of a transportation refrigeration unit |
US20180355775A1 (en) * | 2015-11-17 | 2018-12-13 | Carrier Corporation | Temperature control of exhaust gas of a transportation refrigeration unit |
KR20190092525A (en) * | 2017-03-30 | 2019-08-07 | 얀마 가부시키가이샤 | tractor |
JP2018168847A (en) * | 2017-03-30 | 2018-11-01 | ヤンマー株式会社 | Tractor |
EP3604758A4 (en) * | 2017-03-30 | 2020-02-19 | Yanmar Co., Ltd. | Tractor |
WO2018180028A1 (en) * | 2017-03-30 | 2018-10-04 | ヤンマー株式会社 | Tractor |
KR102183434B1 (en) | 2017-03-30 | 2020-11-26 | 얀마 파워 테크놀로지 가부시키가이샤 | tractor |
US10994603B2 (en) | 2017-03-30 | 2021-05-04 | Yanmar Power Technology Co., Ltd. | Tractor |
US11458833B2 (en) | 2017-03-30 | 2022-10-04 | Yanmar Power Technology Co., Ltd. | Tractor |
USD966343S1 (en) * | 2019-10-16 | 2022-10-11 | Deere & Company | Air intake tower |
USD967199S1 (en) * | 2019-10-16 | 2022-10-18 | Deere & Company | Air intake tower |
USD993991S1 (en) | 2019-10-16 | 2023-08-01 | Deere & Company | Air intake tower |
USD993992S1 (en) | 2019-10-16 | 2023-08-01 | Deere & Company | Air intake tower |
Also Published As
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---|---|
DE102011003498A1 (en) | 2012-03-01 |
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