CN104303378B - Plane commutator and the method for being installed to plane commutator on the axle of motor - Google Patents
Plane commutator and the method for being installed to plane commutator on the axle of motor Download PDFInfo
- Publication number
- CN104303378B CN104303378B CN201380026976.XA CN201380026976A CN104303378B CN 104303378 B CN104303378 B CN 104303378B CN 201380026976 A CN201380026976 A CN 201380026976A CN 104303378 B CN104303378 B CN 104303378B
- Authority
- CN
- China
- Prior art keywords
- main body
- contact
- plane commutator
- motor
- commutator
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims description 21
- 238000004804 winding Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004579 marble Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 244000185238 Lophostemon confertus Species 0.000 description 1
- 241000283984 Rodentia Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/04—Commutators
- H01R39/06—Commutators other than with external cylindrical contact surface, e.g. flat commutators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/06—Manufacture of commutators
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
The present invention relates to a kind of plane commutator（10）, it carries contact chip spaced apart（20）, the first main body that contact chip is formed in the material by being electrically insulated（12）In be arranged to, they have been axially formed flat brush operation face（21）.By the plane commutator of the present invention（10）It is characterised by, the plane commutator（10）Made of with the material by being electrically insulated, band radially around and contact-segment spaced apart（16）The second main body（14）, each of which contact-segment（16）Coil termination hook is all equipped in axial section（18）, and wherein the first main body（12）The second main body is surrounded vertically（14）Coil termination hook（18）.In addition the invention further relates to a kind of motor, especially direct current generator, it carries the plane commutator by the present invention（10）, and the invention further relates to one kind to be used for plane commutator（10）It is installed to the axle of motor especially direct current generator（26）On method.
Description
Technical field
The present invention relates to a kind of plane commutator of the type by independent claims and one kind to be used to change plane
The method being installed to device on the axle of motor especially direct current generator.
Background technology
Plane commutator for motor is known to wide people.Therefore one kind is understood by the A1 of DE 10 2,006 046 666
Plane commutator, in the plane commutator, in order in edge side stabilisation hub body and in the end regions of hook side
In and/or in the end regions of axially opposed contact-segment side be configured with some contact pin with along the circumferential direction widening.With this
Mode prevents some parts of of contact pin when continuing to process plane commutator in the armature of motor to fracture or cut.This
Outside, by the widening along the circumferential direction at least one axial end regions of contact pin, also achieve it is a kind of to plastics more
For favourable fiber orientation, the solidness of this hub body to being preferably made up of plastics serves active influence.Because make
By the use of the thermosetting plastics and/or the element of similar other reinforcings for preferably having glass fibre or glass marble as manufacturing wheel hub
Main body, therefore the also material of contact pin, thus they based on the larger plastic quality in the section widened of contact pin
It is uniformly distributed with the raising for helping the stabilisation and mechanical strength of hub body in that region.
In addition, it is widely known for by the A1 of DE 10 2,004 051 460 by coil termination hook hot pressing（Hot Staking heat connects
Close）A kind of method and a kind of device on to the commutator of motor.Here, first electrode and corresponding coil termination hook electric contact
Connect and be pressed on the contact chip of commutator.In addition, at least one second electrode is circumferentially in laterally quilt
So set is attached to arranges on the contact chip of coil termination hook thereon so that electrode loads coil termination hook from both sides.
The content of the invention
Some contact chips spaced apart are carried by the plane commutator of the present invention, these contact chips are disposed such
In the first main body made of the material by being electrically insulated so that they axially form a flat brush operation face,
Compared to the plane commutator by prior art, be by the advantage of the plane commutator of the present invention, its structure height and
Its external diameter is reduced.Therefore, have as the plane commutator of the present invention made of the material being electrically insulated, with radial direction ring
Around and contact-segment spaced apart the second main body, wherein, each in contact-segment is equipped in axial section
One coil termination hook, and wherein, the first main body surrounds the coil termination hook of the second main body vertically.Commutated by plane
The two-piece construction of device and obtain another advantage is that, can be individually in band edge manufacture with sensitive and high-quality
Brush runs first main body in face, it is thus possible to is effectively prevented from damaging caused by the armature installation process of motor.In addition, pin
Consuming to the different carbonaceous amounts using contact chip is smaller.
Other advantages of the present invention are by the feature that illustrates in the dependent claims and by accompanying drawing and ensuing theory
It is bright to draw.
Provide in an advantageous manner, the first and/or second main body respectively by the use of it is including a radial direction, be used as secure fit seat
The axial region to work directly torsionally surrounds the axle of motor.Here, the first main body works as secure fit seat
Axial region also serves as working relative to the sealing mechanism of axle simultaneously, wherein, the sealing mechanism of secure fit seat by and axle
Interference fit or realized by additional O-ring.
In order to ensure electric current from the brush of motor by plane commutator up to winding, the contact chip of the first main body and the
The contact-segment of two main bodys can be mutually electric by radial direction and/or axial connector bindiny mechanism respectively in a particularly advantageous manner
Connection.Known soldering connection or the pressing of the consuming for contact chip and contact-segment contacting can be avoided by this way
Process.In addition, when the first main body contact chip and the contact-segment coating of the second main body or non-coating and/or be equipped with one kind
During surface texture, the one kind that can be electrically connected optimizes.
It is further advantageous that the first and second main bodys have a shape at least in the part of its contact site respectively
The geometry that shape coordinates, this geometry work as the rotation preventing mechanism between the first and second main bodys.With this
Mode avoids the undesirable rotation in the region of connector bindiny mechanism and therefore avoided in contact chip and contact-segment
Between electrical contact interruption.In addition, the winding in motor is realized by the geometry of the form fit of the second main body
Radial direction lockable mechanism during winding process.
Provided in another design of the present invention, the first main body has the ring of an axial direction on its excircle
Groove, O-ring or filler can be loaded into the annular groove as sealing mechanism.
Finally, it is used to the plane commutator by the present invention being installed to motor especially direct current generator the present invention relates to a kind of
Axle on method, this method has the following steps：
By in the second main body passage of plane commutator to axle；
At least one winding of motor and the coil termination hook connects of the contact-segment of the second main body are got up；
By the so passage of the first main body of plane commutator on axle so that the first main body axially surrounds the
The coil termination hook of two main bodys.
Advantage compared with prior art in avoiding the electricity that heat is input to plane commutator in the present inventive method
On brush operation face, the input of this heat may in thermal bonding process in winding with being produced during coil termination hook contacting.This
It also avoid outside during contacting and armature be installed to the brush being likely to occur when on axle and run the impaired of face.In addition,
Also can also be after the winding contacting of coil termination hook and direct current generator, according to the requirement to direct current generator, use connects
The different carbonaceous amounts of contact.
Brief description of the drawings
The present invention is exemplarily hereinafter illustrated by accompanying drawing 1 to 4, wherein, identical reference shows have in figure
The same part of identical working method.
In accompanying drawing：
Fig. 1 is the stereogram by the plane commutator of the present invention；
Fig. 2 is the profile by the plane commutator of the present invention；
Fig. 3 is the two width stereograms by the first main body of the plane commutator of the present invention（Fig. 3 a and 3b）；And
Fig. 4 is the two width stereograms by the second main body of the plane commutator of the present invention（Fig. 4 a and 4b）.
Embodiment
Fig. 1 shows the stereogram of the plane commutator 10 by the present invention of a motor not being shown specifically.But skill
Art personnel are by known in the art, and this plane commutator where is reasonably arranged on an axle of motor and this
Which kind of purpose individual plane commutator meets.Thus, should not have to further inquire into this work herein.
Especially consider a kind of direct current generator of the fuel pump for automobile as motor.But it is also contemplated that other for example exist
Application in ventilation unit, window regulator, windscreen-wiper drive, chair regulator or the like.In addition, by the present invention's
Plane commutator could be used that in the application outside generator or automobile.
It is two-piece type by Fig. 1 plane commutator 10 by the present invention and there is the first main body 12 and the second main body
14, the two main bodys are respectively by a kind of material of electric insulation, such as have the thermosetting plastics and/or class of glass fibre or glass marble
As other reinforcings element form.First and second main bodys 12 or 14 are preferably made up of a kind of moulded plastic.May be used also in Fig. 1
To see, the second main body 14 have on the circumference outside it radially around and contact-segment 16 spaced apart, wherein,
Each of contact-segment 16 is equipped with a coil termination hook 18 in axial section.In addition it can further be seen that the first main body
12 surround the coil termination hook 18 of the second main body 14 along the axial direction of plane commutator 10.Thus, it is possible to phase in an advantageous manner
The external diameter of plane commutator had both been reduced to the common plane commutator by prior art or has reduced its structure height.This
Outside, protective winding contacting is made it possible to for example when armature inserts motor not by the shadow of machinery by surrounding coil termination hook 18
Ring.
Fig. 2 shows a section of transverse cross sectional plane commutator 10.Again it can be seen that the first main body 12 and band
The second main body 14 of coil termination hook 18 for having contact-segment 16 and being integrally connected with the contact-segment.It is right in the first main body 14
The spacing of the contact-segment 16 of the second main body 16 contact chip 20 spaced apart is answered to be arranged to brush operation radially around ground
Face 21.The winding connected with coil termination hook 18 that contact chip 20 is used for the armature of motor is guided by corresponding in brush box
Brush electric contact connect.Because these elements are that technical staff is known and they are in addition to the present invention without important
Meaning, so should not have to show for clarity.
First main body 12 is torsionally surrounded by the use of axial region 22 including a radial direction, being worked as secure fit seat
The axle 26 of motor.Additionally or alternatively, the second main body 14 can also have a corresponding axial region 24 to be used for torsionally
It is connected with axle 26, wherein, axial region 22 and/or axial region 24 can work as the sealing mechanism relative to axle 26.
This point is favourable especially in combination with fuel pump, and contact chip 20 and/or contact-segment 16 are due to rodent liquid in fuel pump
And face impaired threat.But it can be washed away in liquid from surrounding in the other application of commutator, axle 26 is close with respect to commutator 10
Envelope is also likely to be favourable.Here, sealing mechanism can for example be implemented as not showing with the interference fit of axle 26 or by one
The additional O-ring gone out is realized.
The contact-segment 16 of the main body 14 of contact chip 20 and second of first main body 12 can axially be existed by some respectively
Two main bodys 12 and 14 connector bindiny mechanism 28 overlapping after splicing is electrically connected to each other.Alternately or supplement, can also examine
Consider, connector bindiny mechanism 28 along plane commutator 10 radially extend and/or be configured to it is spring-loaded.With this side
Formula can avoid the known soldering connection or pressing process of the consuming of the contacting for contact chip 20 and contact-segment 16.This
Outside, when the coating of connector bindiny mechanism 28 of contact chip 20 or contact-segment 16 and/or when being equipped with a kind of surface texture, Ke Yida
To the improvement of electric interface.But according to the material of contact chip 20（Typically carbon or graphite）And the material of contact-segment 16（Generally
It is copper or copper alloy）, it is also contemplated that the connector bindiny mechanism 28 without coating.
In order to avoid the first main body 12 rotates unintentionally relative to the second main body 14 and therefore in contact chip 20 and contact-segment
Electrical connection between 16 is interrupted, and the first and second main bodys 12 or 14 have one respectively at least on the subregion of their contact site
The geometry 30 of kind form fit, it is used for anti-rotation.The geometry 30 of the form fit of second main body 14 in this as
Radial direction lockable mechanism during the winding process of the winding of motor works.
For further sealing plane type commutator 10, set on the excircle of the first main body 12 one radially around
The annular groove 32 of axial direction, such as unshowned O-ring or packing material can be loaded into the annular groove.
In figures 3 and 4 respectively in different three-dimensional views（Fig. 3 a, 3b；4a、4b）In show the first master apart from each other
The main body 14 of body 12 and second.The band connector bindiny mechanism 28 of contact chip 20 can be seen well in fig 3b and matched somebody with somebody as fixation
The arrangement of the structure of the inside of the first main body 12 of the axial region 22 that seat works and the contact-segment 16 of the second main body 14 is closed,
The geometry 30 of the form fit of second main body and the axial region 24 that works as secure fit seat are in figs 4 a and 4b
Show.
By the present invention for the method that plane commutator 10 is installed on the axle 26 of motor to be had into the following steps：
Second main body 14 of plane commutator 10 is elapsed on axle 26；
At least one winding of motor and the coil termination hook 18 of the contact-segment 16 of the second main body 14 are connected；
And
By in the first main body 12 of plane commutator 10 so passage to axle 26 so that the first main body 12 is along axle
To the coil termination hook 18 for surrounding the second main body 14.
Advantage compared with prior art in avoiding heat and be input to plane commutator 10 in the present inventive method
On brush operation face 21, the input of this heat may in thermal bonding process in winding with being produced during coil termination 18 contacting of hook
It is raw.In addition, it can also also be wanted after the winding contacting of coil termination hook 18 and direct current generator according to direct current generator
Ask and use the different carbonaceous amounts of contact chip.
Finally it is noted that shown embodiment be both not limited to Fig. 1 to 4 be also not limited to contact chip 20
One main body 12, the form shown there and their size of the second main body 14 with contact-segment 16.Annular groove 32
Accurate construction is also only exemplary and is not restricted.
Claims (13)
1. plane commutator（10）, there is contact chip spaced apart（20）, the contact chip is in the material by being electrically insulated
The first main body formed（12）In be arranged to, they have been axially formed flat brush operation face（21）, it is characterised in that institute
State plane commutator（10）Made of with the material by being electrically insulated, with radially around and contact-segment spaced apart
（16）The second main body（14）, wherein the contact-segment（16）In each contact-segment winding is equipped in axial section
Terminal hook（18）, and wherein described first main body（12）Second main body is surrounded vertically（14）Coil termination hook
（18）, wherein described first and/or second main body（12、14）Respectively by the use of it is including radial direction, act as secure fit seat
Axial region（22、24）Directly by the axle of motor（26）Torsionally surround, wherein first main body（12）Conduct consolidate
Determine the axial region that matching seat works（22）Also serve as simultaneously relative to the axle（26）Sealing mechanism work, wherein institute
State coil termination hook（18）It is arranged on second main body（14）Lateral surface on, wherein first main body（12）Radially exist
State coil termination hook in external lid residence（18）.
2. the plane commutator as described in claim 1（10）, it is characterised in that the sealing mechanism of the secure fit seat leads to
Cross and the axle（26）Interference fit or realized by additional O-ring.
3. the plane commutator as described in claim 1 or 2（10）, it is characterised in that first main body（12）Contact
Piece（20）With second main body（14）Contact-segment（16）Radial direction and/or axial connector bindiny mechanism can be passed through respectively
（28）It is electrically connected to each other.
4. the plane commutator as described in claim 3（10）, it is characterised in that first main body（12）Contact chip
（20）With second main body（14）Contact-segment（16）Coating or not coating and/or it is equipped with surface texture.
5. the plane commutator as described in claim 1 or 2（10）, it is characterised in that described first and second main body
（12、14）There is the geometry of form fit at least on the subregion of their contact site respectively（30）, the geometry knot
Structure is as described first and second main body（12、14）Between rotation preventing mechanism work.
6. the plane commutator as described in claim 5（10）, it is characterised in that second main body（14）The shape
The geometry of cooperation（30）Worked as the radial direction lockable mechanism during the winding process of the winding of motor.
7. the plane commutator as described in claim 6（10）, it is characterised in that the motor is direct current generator.
8. the plane commutator as described in claim 1 or 2（10）, it is characterised in that first main body（12）Outside it
There is the annular groove of axial direction on circumference（32）.
9. the plane commutator as described in claim 8（10）, it is characterised in that O-ring or filler can be used as sealing mechanism
It is loaded into the axial annular groove（32）In.
10. motor, it is with the plane commutator as described in any one of preceding claims（10）.
11. the motor as described in claim 10, it is characterised in that the motor is direct current generator.
12. it is used for the plane commutator as any one of claim 1 to 9（10）It is installed to the axle of motor（26）On
Method, there are the following steps：
By the plane commutator（10）The second main body（14）Elapse the axle（26）On；
By at least one winding of the motor and second main body（14）Contact-segment（16）Coil termination hook（18）
Connect；
By the plane commutator（10）The first main body（12）Elapse the axle（26）On so that first main body
（12）Axially surround second main body（14）Coil termination hook（18）.
13. the method as described in claim 12, it is characterised in that the motor is direct current generator.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012010251.8 | 2012-05-25 | ||
| DE102012010251A DE102012010251A1 (en) | 2012-05-25 | 2012-05-25 | Plankommutator and method for mounting a flat commutator on a shaft of an electric machine |
| PCT/EP2013/058432 WO2013174596A1 (en) | 2012-05-25 | 2013-04-24 | Flat commutator and method for mounting a flat commutator onto a shaft of an electrical machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104303378A CN104303378A (en) | 2015-01-21 |
| CN104303378B true CN104303378B (en) | 2018-02-23 |
Family
ID=48190961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380026976.XA Expired - Fee Related CN104303378B (en) | 2012-05-25 | 2013-04-24 | Plane commutator and the method for being installed to plane commutator on the axle of motor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2856578B1 (en) |
| CN (1) | CN104303378B (en) |
| DE (1) | DE102012010251A1 (en) |
| WO (1) | WO2013174596A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006046666A1 (en) * | 2006-09-29 | 2008-04-03 | Robert Bosch Gmbh | Flat commutator for e.g. electrical machine, has bar widened in circumferential direction when axially viewed from brush running surface in direction of connection hook and/or viewed from connection hook in direction of running surface |
| CN101167220A (en) * | 2005-06-16 | 2008-04-23 | 考特及布克斯有限公司 | Flat commutator and method for producing a flat commutator |
| CN101490912A (en) * | 2006-05-10 | 2009-07-22 | 科莱克特集团公司 | Commutator rotor of an electrical machine and procedure for its manufacture |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004003146B4 (en) * | 2003-01-22 | 2023-08-24 | Aisan Kogyo Kabushiki Kaisha | Motor, fuel pump, commutator and method of making a commutator |
| DE102004051460A1 (en) | 2004-10-22 | 2006-04-27 | Robert Bosch Gmbh | Method and device for hot pressing hooks on commutators |
-
2012
- 2012-05-25 DE DE102012010251A patent/DE102012010251A1/en not_active Withdrawn
-
2013
- 2013-04-24 EP EP13719085.6A patent/EP2856578B1/en not_active Not-in-force
- 2013-04-24 CN CN201380026976.XA patent/CN104303378B/en not_active Expired - Fee Related
- 2013-04-24 WO PCT/EP2013/058432 patent/WO2013174596A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101167220A (en) * | 2005-06-16 | 2008-04-23 | 考特及布克斯有限公司 | Flat commutator and method for producing a flat commutator |
| CN101490912A (en) * | 2006-05-10 | 2009-07-22 | 科莱克特集团公司 | Commutator rotor of an electrical machine and procedure for its manufacture |
| DE102006046666A1 (en) * | 2006-09-29 | 2008-04-03 | Robert Bosch Gmbh | Flat commutator for e.g. electrical machine, has bar widened in circumferential direction when axially viewed from brush running surface in direction of connection hook and/or viewed from connection hook in direction of running surface |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013174596A1 (en) | 2013-11-28 |
| CN104303378A (en) | 2015-01-21 |
| EP2856578A1 (en) | 2015-04-08 |
| EP2856578B1 (en) | 2018-02-21 |
| DE102012010251A1 (en) | 2013-11-28 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180223 Termination date: 20210424 |