CN103748358B - Motor pump unit - Google Patents
Motor pump unit Download PDFInfo
- Publication number
- CN103748358B CN103748358B CN201180072870.4A CN201180072870A CN103748358B CN 103748358 B CN103748358 B CN 103748358B CN 201180072870 A CN201180072870 A CN 201180072870A CN 103748358 B CN103748358 B CN 103748358B
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- China
- Prior art keywords
- motor
- housing component
- cooling duct
- pump unit
- electro
- 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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- 238000001816 cooling Methods 0.000 claims abstract description 86
- 239000007788 liquid Substances 0.000 claims abstract description 51
- 238000007789 sealing Methods 0.000 claims description 21
- 238000004140 cleaning Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000002826 coolant Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Motor pump unit (10) includes electro-motor (22) and pump (12).Electro-motor has motor shell (28), and cooling duct (62) are arranged on outside motor shell.Pump (12) has suction inlet (24) and pressure export (26).Liquid to be pressed can pass through cooling duct (62) and be supplied to suction inlet (24).In order to motor pump unit (10) can manufacture and install in lower cost ground, motor shell (28) has the first and second housing components (38,40), and the first and second housing components are connected to each other and construct cooling duct (62) between which with being able to liquid seal formula.
Description
Technical field
The present invention relates to a kind of motor pump unit for high-pressure cleaning appliance, described motor pump unit includes electro-motor
With the pump by described electrical motor driven, described electro-motor has motor shell, and cooling duct is arranged in described motor shell
On outside, described pump has the suction inlet for aspirating liquid to be pressed and for sending the liquid that is under pressure
Pressure export, wherein, liquid to be pressed can be supplied to described suction inlet by described cooling duct.
Background technology
Utilize such motor pump unit can press to cleaning liquid (preferably water), and subsequently will be clear
The object that clean liquid alignment is to be cleaned.To this end, especially high-pressure hose can be joined on the pressure export of pump, high-pressure hose exists
Such as there is on its free end spray gun or spray boom.
The cooling of electro-motor realizes often through air-flow, and air-flow is especially by the outside being directed through motor shell.So
And this needs sizable heat exchange surface, so air cooling can only be realized in the motor pump unit of spatial spread.
DE8111792U1 advises, in addition to air cools down, is additionally provided with the liquid for electro-motor cools down.For
This, steel pipe embeds the shell wall of motor shell, and steel pipe helically wire loop is around the stator of electro-motor.Certainly, steel pipe is embedded into
The shell wall of motor shell requires considerable manufacturing cost and is associated with sizable expense.
Advising in DE3545665C2, motor shell is configured to cylinder shape, and constructs between motor shell and plastic jacket
In the case of becoming cavity, the plastic jacket being similarly designed to cylinder shape is arranged on motor shell.Sky can be given by entrance sleeve
Chamber supply coolant, coolant can be derived from cavity by discharge connection, and can be supplied to suction inlet subsequently.At this
Planting in design, coolant is around motor shell, thus electro-motor can also in the case of not providing air-flow effectively
Cooling, and thus can have compact configuration.But, provide cavity to require additional plastic jacket, plastic jacket for coolant
Must be arranged on motor shell in additional installation steps.
Summary of the invention
The task of the present invention is, improves the motor pump unit starting described type further so that described motor pump list
Unit can manufacture with lower cost and install.
According to the present invention, this task solves in the motor pump unit of aforementioned type, and described motor shell has the first shell
Body part and the second housing component, described first housing component and described second housing component be connected to each other with being able to liquid seal formula and
Cooling duct is constructed between them.
According in motor pump unit of the present invention, by the first housing component and the splicing structure of the second housing component of motor shell
Become cooling duct.To this end, motor shell has the first housing component preferably towards pump, and preferably deviate from the second shell of pump
Body part.The two housing component can splice for constructing motor shell, and wherein, the two housing component is common structure under splicing state
Cause cooling duct, can be to cooling duct supply liquid to cool down, liquid can be pressed by pump subsequently.
Motor pump unit feature according to the present invention is the manufacture of low cost and simple installation, because, cold in order to provide
But passage only needs the two of motor shell housing component splicings.
Cooling duct has entrance and exit.Liquid can be supplied to cooling duct by entrance.Such as supplying flexible pipe can
To be joined on entrance.Outlet can be connected with pump intake by connecting line, thus is supplied to cooling logical by entrance
The liquid in road can be flowed out from cooling duct by outlet, and can be supplied to pump intake subsequently.
Advantageously, cooling duct is circumferentially extending along electro-motor.Cooling duct can circumferentially surround electro-motor.
Advantageously, for the first housing component and the connection of the fluid-sealing type of the second housing component, use at least one close
Envelope element, this potted component is arranged between the first housing component and the second housing component.Described potted component such as can be designed to O
Type loop type.
Advantageously, being disposed with two potted components between the first housing component and the second housing component, they are respectively along week
To entirely around electro-motor, and close cooling duct at radial outside and radially inner side.
In the Advantageous embodiments according to motor pump unit of the present invention, obtain particularly simple installation as follows:
First housing component and the second housing component longitudinal axis based on electro-motor can in axial direction splice and construct cooling duct.
Advantageously, at least one in two housing components is designed to cylinder shape, and with its free end side relative to another shell
Body part is directed at.
Particularly advantageously, not only the first housing component and also the second housing component is also configured as cylinder shape, and the two housing
Part is directed at relative to each other with their free end side.
If two housing components can axially splice, then at least one in the two housing component is towards another housing component
Side, structure circumferentially surrounds the holder ringwise of electro-motor, and described annular holder has spliced at two housing components
Covered constructed cooling duct by another housing component liquid sealing under state.
Advantageously, the first and/or second housing component is configured to bearing cap, and the motor drive shaft of electro-motor rotatably supports
On described bearing cap.
Particularly advantageously, not only the first housing component and also the second housing component is respectively configured to bearing cap, motor drive shaft can turn
It is bearing on described bearing cap dynamicly.Described bearing cap can have holder, and holder accommodates the bearing for motor drive shaft, preferably
Ball bearing.
Preferably, the first housing component and/or the second housing component hot charging are on the stator of electro-motor.
It can be stated that two housing component hot chargings are on the stator of electro-motor.
As an alternative it can be stated that the only first housing component or the only second housing component hot charging are on stator.Only two housing components
In the hot charging of the installation of the motor pump unit according to the present invention is simplified further.
Advantageously, the first housing component and/or the second housing component have circumferentially surround electro-motor sidewall and end
Side hides the diapire of electro-motor, and wherein, the diapire compared with the region that cooling duct is adjacent of sidewall has bigger wall thickness.This
The design of type has the advantage that, motor shell has relatively large wall in the region adjacent with cooling duct
Thickness, described relatively large wall thickness gives big heat conductivity to motor shell, thus electro-motor waste heat can be by having more
The sidewall areas of big wall thickness is particularly effectively directed to cooling duct, and waste heat can be by flowing through cooling duct at cooling duct
Liquid is derived.On the contrary, in relatively cool passage has the motor shell region of large pitch, the wall thickness of motor shell is kept as
Less.Thus can alleviate the weight of motor shell and equally reduce the material quantity for manufacturing motor shell.This
Reduce manufacturing cost.
It is particularly advantageous that not only the first housing component and also the second housing component is respectively provided with the side circumferentially surrounding electro-motor
Wall and side hide electro-motor diapire, wherein, the two housing component is in the region adjacent with cooling duct of sidewall, phase
Ratio has bigger wall thickness in their respective bottom walls region.
In order to provide cooling duct, in Advantageous embodiments of the present invention, the first housing component and the second housing component have respectively
Having cooling duct wall, wherein, cooling duct wall energy is enough to be connected to each other when the two housing component splices liquid sealing, and
Construct cooling duct between which.The two cooling duct wall defines the cooling duct constructed between which.If this
Two housing component splicings, then cooling duct wall preferably liquid sealing in the case of at least one potted component of interface
Ground is against each other.
Advantageously, at least one cooling duct wall is designed to groove type.It can be stated that in only two housing components one
Cooling duct wall there is the design in groove type, on the contrary, another cooling duct wall is only configured to cover plate, and described cover plate liquid is close
Envelope formula ground covers the conduit wall in groove type.As an alternative it can be stated that the two housing component to be respectively configured to groove type cooling logical
Road wall, advantageously, described the most recessed when two housing component splicings, in the case of at least one potted component of interface
Flute profile cooling duct wall is in side against each other.
In design specifically preferred according to the invention, the first housing component and the second housing component row of being configured with between which
Circulation road, described current drainage channel has at least one outlet, and current drainage channel be arranged in cooling duct and electro-motor it
Between.In such design, also applying current drainage channel in addition to cooling duct, current drainage channel is such as cooling duct
Equally by the two of motor shell housing component structures.Cooling duct is arranged on the radial outside of current drainage channel.This has as follows
Advantage, under the leakage situation of cooling duct, liquid will not directly arrive the parts with voltage of electro-motor.Specifically, cold
But in the case of path leakage, liquid or directly arrive around the space outerpace of motor shell, otherwise liquid flows to be arranged in cold
But in the current drainage channel between passage and electro-motor, and can be arrived by least one outlet of current drainage channel subsequently
Around the space outerpace of electro-motor, liquid is easily seen by the user there.Even if thus under the leakage situation of cooling duct, flowing
The liquid of cooled passage also cannot be directly entered the parts with voltage of electro-motor, thus under the leakage situation of cooling duct also
Can reliably get rid of and bring danger to user.Such leakage is such as likely to be and is caused by impingement conduit wall
's.
Advantageously, between cooling duct and current drainage channel, at least one potted component, such as o-ring are arranged.If
The potted component being arranged between cooling duct and current drainage channel loses its sealing, then also only result in, and liquid can be from cooling
Passage flows to current drainage channel.Because current drainage channel has at least one outlet, so liquid can leak feelings at potted component
Arrive the space outerpace around electro-motor under condition, and then can be easily seen by the user.
In decision design mode of the present invention, the first housing component and the second housing component are respectively provided with current drainage channel wall, wherein,
Current drainage channel wall energy is enough to be connected to each other when the two housing component splices liquid sealing and constructs drainage between which
Passage.
Advantageously, the two current drainage channel wall is the most overlapping.Such as it can be stated that the two drainage is led to
Road wall includes radial wall section and axial walls section, wherein, radial wall section ground the most spaced from one another cloth respectively
Put, and axial walls section is arranged with keeping spaced radial each other.Here, the axial walls section ring of in two housing components one
Axial walls section around another housing component.It is configured to the annular space of current drainage channel between axial walls section and radial wall section
Stretch.
First housing component and/or the second housing component are preferably formed from metal.Especially it can be stated that the two housing component is by structure
Make as aluminium diecasting or zine pressure casting.This can realize manufacturing motor shell at low cost, is also advantageous in that in addition, electro-motor
Waste heat can particularly effectively be derived on the liquid flow through cooling duct.
Accompanying drawing explanation
The combination accompanying drawing as described below of the preferred embodiment for the present invention is used for further instruction.Wherein:
Fig. 1 illustrates that side view cuts open in the office of the motor pump unit according to the present invention；And
Fig. 2 illustrates the axonometric chart that the local of the motor pump unit according to Fig. 1 splits.
Detailed description of the invention
Schematically showing according to motor pump unit 10 of the present invention in accompanying drawing, it is used for high-pressure cleaning appliance.Motor pump unit
10 include that pump 12, pump 12 are configured to piston pump in the illustrated embodiment and have and multiple be parallel to motor pump unit 10
The reciprocating piston of longitudinal axis 14.First piston 16 shown in Fig. 1 and the second piston 18.Piston 16,18 reclines rotating disk
20, electro-motor 22 makes rotating disk 20 rotate.Piston 16,18 stretches into the most accordingly in the accompanying drawings for becoming apparent from general view
And unshowned pump chamber, thus when piston 16,18 moves back and forth, it should the liquid pressed by pump 12 can be by pump 12
Suction inlet 24 aspirates and passes through the pressure export 26 of pump and sends.Pressure hose not shown in accompanying drawing can connect in a familiar manner
Closing on pressure export 26, pressure hose such as has spray gun or spray boom at its free end.This makes user will locate
Liquid alignment object under pressure is cleaned.
Electro-motor 22 includes motor shell 28, and it is around inner space 30.In the stator 32 of electro-motor 22 is arranged in
In space, portion 30, stator 32 is according to the rotor 34 of normal method cincture electro-motor 22.Rotor 34 is maintained in anti-relative rotation
On motor drive shaft 36 relative to longitudinal axis 14 conllinear orientation.As already described, rotating disk 20 may be at rotating by motor drive shaft 36
State is to drive pump 12.
Motor shell 28 is two-part.It includes the first housing component 38 towards pump 12 and deviates from the second shell of pump 12
Body part 40.First housing component 38 is designed to cylinder shape and includes the first side wall 42, and the first side wall 42 is towards the second housing component 40
Direction protrudes from the first diapire 44.First diapire 44 constitutes clutch shaft bearing lid 46, and motor drive shaft 36 is rotatable by clutch shaft bearing 50
Be bearing on clutch shaft bearing lid 46.
Second housing component 40 is similarly designed to cylinder shape, and includes the second sidewall 52 circumferentially surrounding stator 32, and second
Sidewall 52 axially protrudes the second diapire 54 in the second housing component 40 towards the first housing component 38.Second diapire 54 constitutes second
Bearing cap 56, motor drive shaft 36 is rotatably supported on the second bearing cap 56 by the second bearing 58.
First housing component 38 and the second housing component 40 combination constitute circumferentially surround electro-motor 22 current drainage channel 60, with
And circumferentially surround the cooling duct 62 of electro-motor 22.Current drainage channel 60 is diametrically disposed at cooling duct 62 and electro-motor
Between 22.Current drainage channel 60 is by the first row circulation road wall 64 of the first housing component 38 and the second row circulation road of the second housing component 40
Wall 66 is constituted.First row circulation road wall 64 includes the radial wall section that longitudinal axis 14 based on motor pump unit 10 is radial oriented
68, axial walls section 70 is joined on radial wall section 68.With corresponding manner, second row circulation road wall 66 includes radial wall section
72 and axial walls section 74.The axial walls section 70 of first row circulation road wall 64 is empty in the annular being configured to current drainage channel 60 form
Around the axial walls section 74 of second row circulation road wall 66 in the case of between.Thus current drainage channel 60 is vertically by Liang Ge radial wall district
Section 68 and 72 limits, and is radially limited by two axial walls sections 70 and 74.Axial walls at second row circulation road wall 66
The first sealing in the first sealing ring 76 form it is disposed with between the radial wall section 68 of section 74 and first row circulation road wall 64
Element, and between the radial wall section 72 and the axial walls section 70 of first row circulation road wall 64 of second row circulation road wall 66
It is disposed with the second potted component in the second sealing ring 78 form.By two sealing rings 76 and 78 liquid sealing ground row of closing
Circulation road 60.
Cooling duct 62 is in the illustrated embodiment by first cooling duct wall 80 He in groove type of the first housing component 38
The second cooling duct wall 82 in groove type of the second housing component 40 is constituted.First cooling duct wall 80 is radially joined to first row
On the axial walls section 70 of circulation road wall 64, and the second cooling duct wall 82 is radially joined to second row circulation road wall 66
On radial wall section 72.The 3rd potted component in the 3rd sealing ring 84 form keeps radial spacing with relative second sealing ring 78
Mode be arranged between the first cooling duct wall 80 and the second cooling duct wall 82.Thus cooling duct 62 is by the second sealing ring
78 and the 3rd sealing ring 84 close.
Supplying liquid can to cooling duct 62 by the cooling duct entrance 86 shown in Fig. 1, liquid can flow through cooling
Passage 62 is also sent by the cooling duct outlet 88 shown in Fig. 2.Connecting line 90 is joined in cooling duct outlet 88, connects
Cooling duct outlet 88 is connected by pipeline 90 with the suction inlet 24 of pump 12.Enter pipeline 92 to be joined on cooling duct entrance 86,
Feeding pipe (such as flexible pipe) can be joined to enter on pipeline 92.Thus, it should the liquid pressed by pump 12 can lead to
Cross entrance pipeline 92, cooling duct 62 and connecting line 90 and be supplied to pump 12, pump 12 press, pass through pressure export subsequently
26 send.The flow direction of liquid is illustrated by arrow 94 in fig. 2.The liquid flowing through cooling duct 62 absorbs electro-motor 22
Waste heat, such that it is able to effectively cooling electro-motor 22.In order to improve the heat conductivity of motor shell 28, the second sidewall 52 and first
The wall thickness of sidewall 42 in the region of adjacent rows circulation road 60 and cooling duct 62 more than the first diapire 44 and the second diapire 54
Wall thickness.This is especially illustrated by Fig. 1.
Current drainage channel 60 has multiple outlet in radial wall section 68 region of first row circulation road wall 64, wherein,
In the accompanying drawings it can be seen that outlet 96.If leakage occurring at region, cooling duct 62 inner motor housing 28, then flow through cold
But the liquid of passage 62, or directly arrive around the space outerpace of electro-motor 22, so that user is it can be seen that liquid, with
Rear user can close motor pump unit 10, or liquid arrives current drainage channel 60, and liquid can lead to from current drainage channel 60
Cross outlet 96 and flow out to again the space outerpace around electro-motor 22.Thereby through being arranged in cooling duct 62 and electro-motor
Current drainage channel 60 between 22 ensure that, does not also have liquid can arrive in motor shell 28 under the leakage situation of cooling duct 62
Space, portion 30.Thus the parts with voltage eliminating liquid contact electro-motor 22 bring danger to user.If such as
There is leakage in two sealing rings 78, then liquid only flows to current drainage channel 60 from cooling duct 62, without flowing to motor shell
In the inner space 30 of 28.
First housing component 38 and the second housing component 40 underground heat away form one another can be installed to electricity to install electro-motor 22
On the stator 32 of dynamic motor 22, wherein, in the case of being configured with current drainage channel 60 and cooling duct 62, the first housing component 38 and the
Two housing components 40 pass through the interface of first sealing ring the 76, second sealing ring 78 and the 3rd sealing ring 84 in side liquid seal
Formula ground is against each other.Thus install and be designed to be the simplest.
Claims (11)
1. the motor pump unit (10) for high-pressure cleaning appliance, described motor pump unit include electro-motor (22) and by
The pump (12) that described electro-motor (22) drives, described electro-motor has motor shell (28), and cooling duct (62) are arranged in
On outside described motor shell, described pump has the suction inlet (24) for aspirating liquid to be pressed and is used for sending place
The pressure export (26) of the liquid under pressure, wherein, liquid to be pressed can be supplied by described cooling duct (62)
Described suction inlet (24) should be given, it is characterised in that described motor shell (28) have the first housing component and the second housing component (38,
40), described first housing component and described second housing component are connected to each other and construct between which with being able to liquid seal formula
Described cooling duct (62), wherein, described first housing component (38) and described second housing component (40) are configured with between which
Current drainage channel (60), described current drainage channel has at least one outlet (96), and described current drainage channel is arranged in described cold
But between passage (62) and described electro-motor (22), and wherein, at least one outlet of described current drainage channel (60)
(96) liquid can be directed to the space outerpace around described motor shell (28) from described current drainage channel (60), so that liquid
Body is easily seen by the user.
Motor pump unit the most according to claim 1, it is characterised in that described first housing component and described second housing component
(38,40) longitudinal axis based on described motor pump unit (10) (14) can in axial direction splice and constructs described cooling duct
(62)。
Motor pump unit the most according to claim 1, it is characterised in that described first housing component (38) and/or described
Two housing components (40) are configured to bearing cap (46,56), and the motor drive shaft (36) of described electro-motor (22) can be rotatably supported at institute
State on bearing cap.
Motor pump unit the most according to claim 1, it is characterised in that described first housing component (38) and/or described
Two housing components (40) hot charging is on the stator (32) of described electro-motor (22).
Motor pump unit the most according to claim 1, it is characterised in that described first housing component (38) and/or described
Two housing components (40) have circumferentially surround described electro-motor (22) sidewall (42,52) and side hide described electronic
The diapire (44,54) of motor (22), wherein, compared with the region adjacent with described cooling duct (62) of described sidewall (42,52)
Described diapire (44,54) has bigger wall thickness.
Motor pump unit the most according to claim 1, it is characterised in that described first housing component (38) and described second shell
Body part (40) is respectively provided with cooling duct wall (80,82), and wherein, described cooling duct wall (80,82) can be at two housing components
It is connected to each other during (38,40) splicing liquid sealing, and constructs described cooling duct (62) between which.
Motor pump unit the most according to claim 6, it is characterised in that at least one cooling duct wall (80,82) designs
Become groove type.
Motor pump unit the most according to claim 1, it is characterised in that lead in described cooling duct (62) and described drainage
At least one potted component (78) is arranged between road (60).
Motor pump unit the most according to claim 1, it is characterised in that described first housing component (38) and described second shell
Body part (40) is respectively provided with current drainage channel wall (64,66), and wherein, described current drainage channel wall (64,66) can be at two housing components
It is connected to each other and constructs described current drainage channel (60) between which liquid sealing during (38,40) splicing.
Motor pump unit the most according to claim 9, it is characterised in that two current drainage channel walls (64,66) are each other along axle
To overlap.
11. according to the motor pump unit one of claim 1 to 6 Suo Shu, it is characterised in that described first housing component (38) and/
Or described second housing component (40) is made of metal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2011/064026 WO2013023687A1 (en) | 2011-08-15 | 2011-08-15 | Motor pump unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103748358A CN103748358A (en) | 2014-04-23 |
| CN103748358B true CN103748358B (en) | 2016-11-30 |
Family
ID=
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3738592C1 (en) * | 1987-11-13 | 1989-05-24 | Licentia Gmbh | Electric motor for driving a liquid pump, and a method for its production |
| JP2009213218A (en) * | 2008-03-03 | 2009-09-17 | Nissan Motor Co Ltd | Cooling structure for rotating electrical machines and manufacturing method therefor |
| CN101663483A (en) * | 2007-02-21 | 2010-03-03 | 阿尔弗雷德·凯驰两合公司 | Motor pump unit particularly for a high-pressure cleaning device |
| DE102009010461A1 (en) * | 2009-02-13 | 2010-08-19 | Alfred Kärcher Gmbh & Co. Kg | Motor pump unit |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3738592C1 (en) * | 1987-11-13 | 1989-05-24 | Licentia Gmbh | Electric motor for driving a liquid pump, and a method for its production |
| CN101663483A (en) * | 2007-02-21 | 2010-03-03 | 阿尔弗雷德·凯驰两合公司 | Motor pump unit particularly for a high-pressure cleaning device |
| JP2009213218A (en) * | 2008-03-03 | 2009-09-17 | Nissan Motor Co Ltd | Cooling structure for rotating electrical machines and manufacturing method therefor |
| DE102009010461A1 (en) * | 2009-02-13 | 2010-08-19 | Alfred Kärcher Gmbh & Co. Kg | Motor pump unit |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: German Wen Nendeng Patentee after: Alfred Kahn Europe GmbH & Co. kg Address before: German Wen Nendeng Patentee before: Kaercher GmbH & Co. KG Alfred |