CN101449948A - Cyclone system for dust collector and dust collector with the same - Google Patents
Cyclone system for dust collector and dust collector with the same Download PDFInfo
- Publication number
- CN101449948A CN101449948A CNA2007101904855A CN200710190485A CN101449948A CN 101449948 A CN101449948 A CN 101449948A CN A2007101904855 A CNA2007101904855 A CN A2007101904855A CN 200710190485 A CN200710190485 A CN 200710190485A CN 101449948 A CN101449948 A CN 101449948A
- Authority
- CN
- China
- Prior art keywords
- barrier element
- cyclone separator
- cyclonic chamber
- air
- mouth
- 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.)
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1658—Construction of outlets
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/24—Hand-supported suction cleaners
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1608—Cyclonic chamber constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
- B04C5/13—Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamber; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
- B04C5/181—Bulkheads or central bodies in the discharge opening
Abstract
The invention relates to a cyclone separating device (1) used on a dust collector (2), comprising a cyclone cavity (10) which is provided with an air current inlet (11), a side wall (12) and an end wall (13), wherein in use, the air flow including rubbish collected by the dust collector comes into the cyclone cavity (10) via the air flow inlet (11) and rotationally moves along the side wall (12); an immersionpipe (20), which immerses into the cyclone cavity (10) and is provided with a pipe mouth (21), through which the air flow separated by the cyclone can come into the immersionpipe (20) and leave the cyclone cavity (10); and a barrier element which is arranged between the pipe mouth (21) and the end wall (13); wherein, an air inlet (41) is formed between the pipe mouth (21) and the barrier element (30). Based on the prior cyclone separating device, the cyclone separating device (1) used on a dust collector (2) is characterized in that: the barrier element (30) is provided with an outer surface (31) which is continuous and which shrinks gradually to the top (32) of the barrier element (30) along the direction of the end wall (13) of the cyclone cavity (10). The cyclone separating device (1) can be applied in the dust collectors.
Description
[technical field]
The present invention relates to a kind of cyclone separator that is used for dust catcher, it comprises cyclonic chamber, this cyclonic chamber has air flow inlet, sidewall and end wall, in use, the air communication that contains rubbish that is sucked by described dust catcher is crossed described air flow inlet and is entered described cyclonic chamber and rotatablely move along described sidewall; Dipping tube, it immerses described cyclonic chamber and has a mouth of pipe, crosses this mouth of pipe through the air communication of cyclonic separation and can enter described dipping tube and leave described cyclonic chamber; And barrier element, it is arranged between the described mouth of pipe and the described end wall; Wherein, between the described mouth of pipe and described barrier element, form air inlet.The invention still further relates to dust catcher with this cyclone separator.
[background technology]
This cyclone separator can be learnt among the 711B2 from U.S. Pat 6,896.According to the exposure of its specification, this existing cyclone separator comprises a rubbish barrier element, and this barrier element has sphere and be configured imaging plate the same.The inner surface of this barrier element is towards the end wall of cyclonic chamber, the air-flow that leave can with the inner surface collision of barrier element, stopped by this barrier element and fall into refuse container thereby be included in rubbish in the air-flow.The shortcoming of this cyclone separator is, being blocked the rubbish that element stops might be caught once more by the follow-up air-flow that will leave cyclonic chamber.Therefore, rubbish has higher possibility and leaves cyclonic chamber.
[summary of the invention]
Therefore, the objective of the invention is to overcome the problems referred to above of prior art, thereby most rubbish are separated from air-flow, the risk that especially fine particles can leave cyclonic chamber is that minimum should be possible.
The present invention is about a kind of cyclone separator that is used for dust catcher, comprise: cyclonic chamber, this cyclonic chamber has air flow inlet, sidewall and end wall, in use, the air communication that contains rubbish that is sucked by described dust catcher is crossed described air flow inlet and is entered described cyclonic chamber and rotatablely move along described sidewall; Dipping tube, it immerses described cyclonic chamber and has a mouth of pipe, crosses this mouth of pipe through the air communication of cyclonic separation and can enter described dipping tube and leave described cyclonic chamber; And barrier element, it is arranged between the described mouth of pipe and the described end wall; Wherein, form air inlet between the described mouth of pipe and described barrier element, it is characterized in that: described barrier element has an outer surface, and this outer surface is continuous and is being retracted to a top gradually on the direction of the end wall of described cyclonic chamber.
Enter dipping tube with before leaving cyclonic chamber at air-flow, the outer surface collision of air-flow elder generation and barrier element, thereby, be included in can from air-flow, separate by collision to the small part particulate in the air-flow, and, because the shape of described outer surface, these rubbish can be towards the sidewall motion of cyclonic chamber.These air-flows that contain rubbish that can newly be come in towards rubbish of described sidewall motion are taken away, and accept cyclonic separation once more, can improve significantly with the separative efficiency of this cyclone separator.
Other combine separately or with other features and the feature that is considered to characteristic of the present invention will be set forth in following additional claim.
According to supplementary features of the present invention, the related setting of described barrier element with described dipping tube.
Preferably, described barrier element is connected with described dipping tube by a Connection Element, and described Connection Element and described barrier element are set to one, thereby simplify the assembling of described separator.
According to of the present invention one preferred embodiment, the related setting of described barrier element with a cone, described cone is arranged on the next door of described end wall.
Preferably, described outer surface has the sweep of a forward or negative sense, thereby air-flow can successfully be guided to described sidewall along described sweep.
Preferably, described barrier element is conical, and this shape especially is beneficial to the motion of described air-flow.
According to a favourable embodiment of the present invention, the gross area of described air inlet greater than or equal the cross-sectional area of described dipping tube haply, thereby air pressure can not lost because of the setting of described barrier element.As a particularly preferred mode, the gross area of described air inlet equals the cross-sectional area of described dipping tube haply, thereby, have roughly the same air pressure at described air inlet and described inlet port place.
The another one feature according to the present invention, described sidewall is provided with garbage outlet, and described cyclonic chamber is communicated with a refuse container fluid by this garbage outlet.Preferably, described sidewall forms the part of described refuse container.
According to a particularly preferred embodiment of the present, described garbage outlet have described cyclonic chamber axially on the border of the close described mouth of pipe, wherein, at least a portion of described barrier element is between the described mouth of pipe and described border.
The present invention is applicable to dust catcher.
Structure of the present invention and its other goals of the invention and beneficial effect will become apparent more by the preferred implementation of describing below in conjunction with accompanying drawing.
[description of drawings]
The part of book and in order to providing as an illustration to further understanding of the present invention, the following drawings diagram the specific embodiment of the present invention, and be used for illustrating principle of the present invention with specification.Wherein,
Fig. 1 is the cutaway view of cyclone separator according to the preferred embodiment of the present invention.
Fig. 2 is the stereogram that comprises the dust catcher of preferred embodiment for the present invention cyclone separator.
[specific embodiment description]
In the specific descriptions to preferred implementation below, identical or similar feature has identical Reference numeral.
Please refer to accompanying drawing, at first please especially with reference to Fig. 1.Fig. 1 illustrates the cyclone separator 1 according to a preferred embodiment of the invention.This cyclone separator 1 comprises columnar cyclonic chamber 10 and dipping tube 20.Cyclonic chamber 10 has air flow inlet 11, sidewall 12 and end wall 13.In use, the air communication that contains rubbish is crossed described air flow inlet 11 and is entered described cyclonic chamber 10 and rotatablely move along described sidewall 12.Form garbage outlet 15 on sidewall 12, cyclonic chamber 10 is communicated with refuse container 50 fluids by this garbage outlet 15, thereby rubbish can be separated from air-flow and be collected in this refuse container 50 owing to action of centrifugal force.Preferably, described sidewall 12 forms the part of refuse container 50.Be provided with a cone 14 that is positioned at cyclonic chamber 10 on the next door of described end wall 13.Preferably, this cone 14 forms the part of described end wall 13.In the present embodiment, end wall 13 is to provide with the individual components of cyclonic chamber 10.Preferably, end wall 13 is removably mounted on the cyclone separator 1.Dipping tube 20 immerses in this cyclonic chamber 10 and has the mouth of pipe 21, via this mouth of pipe 21, leaves cyclonic chamber 10 thereby the air-flow that reflects through cyclonic separation, by end wall 13 can enter dipping tube 20.
Between the end wall 13 of the mouth of pipe 21 of dipping tube 20 and cyclonic chamber 10, be provided with barrier element 30.Have a segment distance between the mouth of pipe 21 of barrier element 30 and dipping tube 20,, be communicated with dipping tube 20 fluids thereby cyclonic chamber 10 passes through this air inlet 41 can between the described mouth of pipe 21 and barrier element 30, form air inlet 41.By this air inlet 41, enter dipping tube 20 via the mouth of pipe 21 and leave cyclonic chamber 10 after this through the air-flow of cyclonic separation.
Though do not illustrate, in the another one embodiment, described barrier element 30 also can be connected with described cone 15.
Described Connection Element 40 is to be arranged in such a way: the gross area that it makes the air inlet 41 between the mouth of pipe 21 of barrier element 30 and dipping tube 20 greater than or equal the cross-sectional area of dipping tube 20 haply, thereby avoid the atmospheric pressure lost that causes by the setting of barrier element 30.
The outer surface 31 of barrier element 30 has a sweep 33, thereby air-flow can play the guiding of sweep 33 and more help it towards sidewall 12 motion by this, and in the present embodiment, sweep 33 is a negative sense.Yet this sweep 33 also can be a forward.
In the present embodiment, the top 32 of barrier element 30 extends to such degree: it perpendicular to cyclonic chamber 10 the axle A direction on garbage outlet 15 crossovers.Yet, barrier element 30 can not be exposed to this garbage outlet 15 to small part, that is to say, barrier element 30 to small part be between a border 16 of the mouth of pipe 21 and garbage outlet 15, wherein this border 16 cyclonic chamber 10 the axle A direction on the most close mouth of pipe 21.In the embodiment of a replacement, barrier element 30 be not exposed to this garbage outlet 15 all.
The present invention is applicable to dust catcher.Fig. 2 illustrates a vacuum cleaner 2.Dust catcher 2 comprises main body 5, comprises the suction nozzle (not shown) of the air of rubbish, motor-driven blower fan (not shown) and cyclone separator 1 in order to suction, and wherein this motor-driven blower fan is in order to produce suction and to be set in the compartment of main body.Between suction nozzle and this motor-driven blower fan, formed an air flow path.Above-mentioned cyclone separator 1 is arranged in this air flow path, in order to enter before this compartment separating of garbage from air-flow at air-flow.Suction nozzle can be connected with main body 5 by flexible pipe, also can be directly connected in main body 5.
In use, crossed air flow inlet 11 by dust catcher 2 air communication that suck, that rubbish in load and enter cyclonic chamber 10, begin the cyclonic separation process then.Particularly, load rubbish air-flow along sidewall 12 in the rotation of the ground of spirality on the direction of end wall 13.Thereby the rubbish that most rubbish, especially weight are bigger is because action of centrifugal force is separated from air-flow and is collected in the refuse container 50 by the garbage outlet on the sidewall 12 15.The air-flow that contains residue rubbish (for example dust particle etc.) is reflected by end wall 13 and with the mouth of pipe 21 spirality ground rotation of small rotation diameter towards dipping tube 20.Enter dipping tube 20 with before leaving cyclonic chamber 10 at air-flow, outer surface 31 collisions of air-flow and barrier element 30, thereby be included in the air-flow to small part rubbish because of the collision from air-flow, separate, and these rubbish are because the shape of stop member 30 and towards sidewall 12 motions of cyclonic chamber 10, and the air communication of rubbish after separating crossed air inlet 41 and entered dipping tube 20 and leave cyclonic chamber.These towards rubbish of sidewall 12 motion can newly be come in along the rotation of sidewall 12 spiralitys, load has the air-flow of rubbish to take away.Thereby these are blocked element 30 separating of garbage and carry out the cyclonic separation process once more, and then have improved the rubbish separative efficiency of cyclone separator 1 significantly.
After leaving cyclonic chamber 10 by dipping tube 20, air flow direction is provided with the compartment of motor-driven blower fan (not shown).Preferably, a filter 60 is set in the air path between cyclone separator 1 and motor-driven blower fan, is contained in the most tiny remaining particulate in the air-flow with bag filter.It should be noted that it also is possible arranging another cyclonic separation stage before filter 60, it also is possible perhaps replacing described filter 60 with this another cyclonic separation stage.
Reference numerals list
1 cyclone separator
2 dust catchers
5 main bodys
10 cyclonic chambers
11 air flow inlets
12 sidewalls
13 end walls
14 bullets
15 garbage outlets
20 dipping tubes
The mouth of pipe of 21 dipping tubes 20
30 barrier elements
The outer surface of 31 barrier elements 30
The top of 32 barrier elements 30
40 Connection Elements
41 air inlets
50 refuse containers
60 filters
Claims (11)
1. cyclone separator (1) that is used for dust catcher (2) comprising:
Cyclonic chamber (10), this cyclonic chamber (10) has air flow inlet (11), sidewall (12) and end wall (13), in use, the air communication that contains rubbish that is sucked by described dust catcher is crossed described air flow inlet (11) and is entered described cyclonic chamber (10) and rotatablely move along described sidewall (12);
Dipping tube (20), it immerses described cyclonic chamber (10) and has a mouth of pipe (21), crosses this mouth of pipe (21) through the air communication of cyclonic separation and can enter described dipping tube (20) and leave described cyclonic chamber (10); And barrier element (30), it is arranged between the described mouth of pipe (21) and the described end wall (13);
Wherein, between the described mouth of pipe (21) and described barrier element (30), form air inlet (41);
It is characterized in that:
Described barrier element (30) has an outer surface (31), and this outer surface (31) is continuous and is being retracted to a top (32) gradually on the direction of the end wall (13) of described cyclonic chamber (10).
2. cyclone separator according to claim 1 (1) is characterized in that: described barrier element (30) and the related setting of described dipping tube (20).
3. cyclone separator according to claim 1 and 2 (1) is characterized in that: described barrier element (30) is connected with described dipping tube (20) by a Connection Element (40), and described Connection Element (40) is set to one with described barrier element (30).
4. according to any one described cyclone separator (1) in the claim 1 to 3, it is characterized in that: described barrier element (30) and the related setting of a cone (14), described cone (14) is arranged on the next door of described end wall (13).
5. according to the described cyclone separator of above any one claim (1), it is characterized in that: described outer surface has the sweep (33) of a forward or negative sense.
6. according to the described cyclone separator of above any one claim (1), it is characterized in that: described barrier element (30) is for conical.
7. according to the described cyclone separator of above any one claim (1), it is characterized in that: the gross area of described air inlet (41) greater than or equal the cross-sectional area of described dipping tube (21) haply.
8. according to the described cyclone separator of above any one claim (1), it is characterized in that: described sidewall (12) is provided with garbage outlet (15), and described cyclonic chamber (10) is communicated with a refuse container (50) fluid by this garbage outlet (15).
9. cyclone separator according to claim 8 (1), it is characterized in that: described garbage outlet (15) have described cyclonic chamber (10) axially on the border (16) of the most close described mouth of pipe (21), wherein, at least a portion of described barrier element (30) is positioned between the described mouth of pipe (21) and described border (16).
10. cyclone separator according to claim 8 (1) is characterized in that: described sidewall (12) forms the part of described refuse container (50).
11. a dust catcher comprises according to the described cyclone separator of above any one claim (1).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101904855A CN101449948B (en) | 2007-11-29 | 2007-11-29 | Cyclone system for dust collector and dust collector with the same |
| DE200810044184 DE102008044184A1 (en) | 2007-11-29 | 2008-11-28 | Turbulence separation device for use in vacuum cleaner, has blocking element arranged between tube opening and front wall and including outer surface that shrinks steplessly in direction to front wall of space gradually up to upper section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101904855A CN101449948B (en) | 2007-11-29 | 2007-11-29 | Cyclone system for dust collector and dust collector with the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101449948A true CN101449948A (en) | 2009-06-10 |
| CN101449948B CN101449948B (en) | 2011-08-17 |
Family
ID=40586040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101904855A Expired - Fee Related CN101449948B (en) | 2007-11-29 | 2007-11-29 | Cyclone system for dust collector and dust collector with the same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101449948B (en) |
| DE (1) | DE102008044184A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2542385A (en) * | 2015-09-17 | 2017-03-22 | Dyson Technology Ltd | Vacuum Cleaner |
| GB2542386A (en) * | 2015-09-17 | 2017-03-22 | Dyson Technology Ltd | Vacuum Cleaner |
| CN109330483A (en) * | 2018-11-16 | 2019-02-15 | 江苏美的清洁电器股份有限公司 | The dust and gas separation assembly and dust catcher of dust catcher |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9888817B2 (en) | 2014-12-17 | 2018-02-13 | Omachron Intellectual Property Inc. | Surface cleaning apparatus |
| DE102010038575A1 (en) * | 2010-07-28 | 2012-02-02 | BSH Bosch und Siemens Hausgeräte GmbH | Centrifugal separator with upstream impact surface |
| JP6297497B2 (en) * | 2011-12-19 | 2018-03-20 | コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． | Cyclone vacuum cleaner and cyclone separator |
| EP2923625B1 (en) * | 2014-03-24 | 2016-06-22 | X'Pole Precision Tools, Inc. | Cyclone vacuum cleaner and cyclone separation device thereof |
| JP6786492B2 (en) * | 2014-12-17 | 2020-11-18 | オマクロン・インテレクチュアル・プロパティ・インコーポレイテッドＯｍａｃｈｒｏｎ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｉｎｃ． | Surface cleaning device |
| GB2542387B (en) * | 2015-09-17 | 2017-11-01 | Dyson Technology Ltd | Vacuum cleaner |
| GB2565357B (en) * | 2017-08-11 | 2020-02-05 | Dyson Technology Ltd | Dirt separator for a vacuum cleaner |
| CN110737951B (en) * | 2019-09-04 | 2020-10-13 | 太原理工大学 | Cyclone separator structure parameter setting method based on Gauss random walk whale algorithm |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100445804B1 (en) | 2002-02-27 | 2004-08-25 | 삼성광주전자 주식회사 | Grille assemble for a cyclone-type dust collecting apparatus for a vacuum cleaner |
-
2007
- 2007-11-29 CN CN2007101904855A patent/CN101449948B/en not_active Expired - Fee Related
-
2008
- 2008-11-28 DE DE200810044184 patent/DE102008044184A1/en not_active Withdrawn
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2542385A (en) * | 2015-09-17 | 2017-03-22 | Dyson Technology Ltd | Vacuum Cleaner |
| GB2542386A (en) * | 2015-09-17 | 2017-03-22 | Dyson Technology Ltd | Vacuum Cleaner |
| JP2017056202A (en) * | 2015-09-17 | 2017-03-23 | ダイソン・テクノロジー・リミテッド | Vacuum cleaner |
| JP2017056207A (en) * | 2015-09-17 | 2017-03-23 | ダイソン・テクノロジー・リミテッド | Vacuum cleaner |
| CN106821137A (en) * | 2015-09-17 | 2017-06-13 | 戴森技术有限公司 | Vacuum cleaner |
| GB2542386B (en) * | 2015-09-17 | 2018-10-10 | Dyson Technology Ltd | Vacuum Cleaner |
| GB2542385B (en) * | 2015-09-17 | 2018-10-10 | Dyson Technology Ltd | Vacuum Cleaner |
| US10405708B2 (en) | 2015-09-17 | 2019-09-10 | Dyson Technology Limited | Vacuum cleaner |
| US10470624B2 (en) | 2015-09-17 | 2019-11-12 | Dyson Technology Limited | Vacuum cleaner |
| CN106821137B (en) * | 2015-09-17 | 2020-09-22 | 戴森技术有限公司 | Vacuum cleaner with a vacuum cleaner head |
| CN109330483A (en) * | 2018-11-16 | 2019-02-15 | 江苏美的清洁电器股份有限公司 | The dust and gas separation assembly and dust catcher of dust catcher |
| CN109330483B (en) * | 2018-11-16 | 2021-07-16 | 江苏美的清洁电器股份有限公司 | Dust-air separation assembly of dust collector and dust collector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101449948B (en) | 2011-08-17 |
| DE102008044184A1 (en) | 2009-06-04 |
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