CN107120306B - A kind of sealing structure and the blower using the sealing structure - Google Patents
A kind of sealing structure and the blower using the sealing structure Download PDFInfo
- Publication number
- CN107120306B CN107120306B CN201710321033.XA CN201710321033A CN107120306B CN 107120306 B CN107120306 B CN 107120306B CN 201710321033 A CN201710321033 A CN 201710321033A CN 107120306 B CN107120306 B CN 107120306B
- Authority
- CN
- China
- Prior art keywords
- passage
- channel
- carrier
- seal
- side cover
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/122—Shaft sealings using sealing-rings especially adapted for elastic fluid pumps
Abstract
The present invention provides the blowers of a kind of sealing structure and the application sealing structure, wherein sealing structure includes that first seal, gas passage, the second seal in the outside of the axle sleeve are successively set on along the axle sleeve of blower fan main shaft；The first seal is filled between the axle sleeve and the side cover of blower；The gas passage includes connected first passage and second channel, the ventilation direction first passage vertical and described with the length direction of the axle sleeve of the first passage is connected to the axle sleeve, and there are the ports at certain inclination angle and the second channel to extend near the side cover for the second channel and the first passage；The carrier of the second channel is the second seal, the carrier side of the second channel extends to the carrier of the first passage backwards to the side of the side cover and is covered, and is located at the carrier of the first passage in the cavity formed by the carrier and the axle sleeve of the second channel backwards to the side of the side cover.
Description
Technical field
The present invention relates to ventilation blower technical field, in particular to the wind of a kind of sealing structure and the application sealing structure
Machine.
Background technique
Ventilation blower is the pressure and kinetic energy that mechanical energy is switched to gas using gas as medium, if the gas be it is inflammable,
Gas that is explosive, toxic, having pollution, that requires to seal blower well.
NMP gas is the gas that a kind of pair of atmosphere has pollution, just becomes liquid when temperature is less than 80 DEG C there are one characteristic
Body now just has NMP in the plant produced raw material of lithium battery, in lithium battery production technology, there is the addition of liquid, meets
Heat volatilization, recycling and reusing, NMP blower be exactly played in the link of recycling and reusing conveying containing the gas act on because
During recycling, there are many equipment, pipeline, NMP gas has reformed into liquid to the cold, blower will in face of be gaseous state,
Liquid and the gas-liquid of NMP mix body.
Blower solves the sealing of gas, and there has also been mature technologies, but to medium be gaseous state be again liquid and they
Mixture is again without ready-made blower.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of sealing structure and the blower using the sealing structure,
Gas can be sealed up but also seal up liquid.
To achieve the above object, the present invention provides the following technical scheme that
A kind of sealing structure is successively set on first sealing in the outside of the axle sleeve including the axle sleeve along blower fan main shaft
Part, gas passage, second seal；
The first seal is filled between the axle sleeve and the side cover of blower；
The gas passage includes connected first passage and second channel, the ventilation direction of the first passage and described
The length direction of axle sleeve is vertical and the first passage is connected to the axle sleeve, and the second channel and the first passage are deposited
It is extended near the side cover in the port at certain inclination angle and the second channel；
The carrier of the second channel is the second seal, and the carrier side of the second channel extends to described the
The carrier in one channel backwards to the side cover side and covered, make the carrier of the first passage backwards to the side cover
Side is located in the cavity formed by the carrier and the axle sleeve of the second channel；
The carrier of the second channel backwards to the end of inner core be equipped with around the axle sleeve annular groove, the annular groove be located at by
In another annular groove that the slinger of blower is formed, and exist before the end of the carrier of the slinger and the second channel
Gap makes the channel that S-shaped is formed between two annular grooves.
As a kind of enforceable mode, the first seal is the inner core of polytetrafluoroethylene (PTFE) material, and the inner core is in
Ring-type covers in the outside of the axle sleeve, and is located in the cavity formed by the side cover.
As a kind of enforceable mode, the accent edge of the cavity formed by the side cover is equipped with fillet, the inner core
End relative to the cavity bottom notch from accent edge to the cavity；
The carrier of the first passage cooperates towards the side of the side cover equipped with the accent of shape and the cavity convex
It rises, and the protrusion is protruded into the cavity and offseted with the first seal.
As a kind of enforceable mode, the outside of the carrier of the first passage is arranged in the carrier of the second channel
And it offsets with the carrier of the first passage, so that the first passage and the second channel is connected to form the gas logical
Road.
As a kind of enforceable mode, the carrier of the second channel is polytetrafluoroethylene (PTFE) packing.
As a kind of enforceable mode, the carrier of the first passage be arranged in the outside of the axle sleeve and with it is described
First seal offsets；It is connected between the carrier of the second channel and the side cover by nut；Wherein, the nut is turned
The first seal and the second seal can be compressed.
The present invention also provides following technical solutions:
A kind of blower further includes the pressure sensing being arranged between the side cover and nut including above-mentioned sealing structure
Device, the pressure sensor export corresponding detection signal for detecting pressure between the side cover and the nut.
The beneficial effect of the present invention compared with the prior art is:
The present invention provides the blowers of a kind of sealing structure and the application sealing structure, are blanket gas first, and envelope gas is used
Three measures are exactly for first to utilize itself and main shaft with polytetrafluoroethylene (PTFE) Vehicle Processing forming seal inner core, i.e. first seal
Between minim gap prevent gas from leaking；Second is exactly to be made with an additional gas (air or nitrogen) using its pressure
With with the pressure balance in blower, do not allow gas leak in blower, realized by gas passage；Third road is with being soaked with poly- four
Vinyl fluoride packing, i.e. third sealing element, there are also following features for packing, as the main shaft of moving part and sealing inner core, the disk of static element
Root operation a period of time, the gap between them just become larger, and just adjust the nut on side cover at this time, and side cover squeezes packing, disk
Root deforms, and internal diameter becomes smaller, and gap just becomes smaller naturally, and packing can also be according to degree of wear replacement.Fan casing
In have the NMP of liquid, under the action of impeller, liquid is thrown at main shaft, and under the pressure of the gas, liquid is also attempted along main shaft
Leakage, is thus equipped with a slinger behind impeller, and liquid is thrown in casing under the centrifugal force effect of slinger
On wall, liquid flows to seal groove downward along wall, and liquid has been returned in casing in the trench, without falling on main shaft
, it is therefore prevented that liquid leaks outside along main shaft.
Detailed description of the invention
Fig. 1 is the cross-sectional view for the sealing structure that one embodiment of the invention provides；
Fig. 2 is a partial enlarged view of Fig. 1；
Fig. 3 is another partial enlarged view of Fig. 1.
In figure: 1, axle sleeve；2, first seal；3, side cover；31, fillet；4, gas passage；41, first passage；411, it carries
Body；4111, end；42, second channel；421, carrier；4211, the first annular groove；5, sealing strip；6, casing；7, second seal；
8, slinger；81, the second annular groove；9, impeller；10, main shaft；11, nut 11；12, gap.
Specific embodiment
Below in conjunction with attached drawing, the technical characteristic and advantage above-mentioned and other to the present invention are clearly and completely described,
Obviously, described embodiment is only section Example of the invention, rather than whole embodiments.
Referring to Figures 1 and 2, a kind of sealing structure is present embodiments provided, successively including the axle sleeve 1 along blower fan main shaft 10
First seal 2, gas passage 4, the second seal 7 in the outside of axle sleeve 1 are set；First seal 2 is filled in 1 He of axle sleeve
Between the side cover 3 of blower；Gas passage 4 includes connected first passage 41 and second channel 42, the ventilation side of first passage 41
It is connected to the vertical and first passage 41 with the length direction of axle sleeve 1 with axle sleeve 1, there are one for second channel 42 and first passage 41
The constant inclination angle and port of second channel 42 extends near side cover 3；The carrier 421 of second channel 42 is second seal 7, the
421 side of carrier in two channels 42 extends to the carrier 411 of first passage 41 backwards to the side of side cover 3 and is covered, and makes
The carrier 411 of first passage 41 is located at the cavity formed by the carrier 421 and axle sleeve 1 of second channel 42 backwards to the side of side cover 3
It is interior；The carrier 421 of second channel 42 is equipped with the first annular groove 4211 around axle sleeve 1, the first annular groove 4211 backwards to the end of inner core
In the second annular groove 81 formed by the slinger 8 of blower, and the end of the carrier 421 of slinger 8 and second channel 42
There is gap before, makes the channel for forming S-shaped between two annular grooves.
By taking above-mentioned technical solution, gas can be sealed up but also seal up liquid.It is blanket gas first, seals gas
Tri- measure of Yong Liao, be exactly for first with polytetrafluoroethylene (PTFE) Vehicle Processing forming seal inner core, i.e. first seal 2, using its with
Minim gap prevents leaking for gas between main shaft 10；Second is exactly to utilize it with an additional gas (air or nitrogen)
Pressure effect and the pressure balance in blower, do not allow gas leak in blower, are realized by gas passage 4；Third road is to use
Be soaked with polytetrafluoroethylene (PTFE) packing, i.e. third sealing element, packing there are also following features, main shaft 10 and static element as moving part it is close
Inner core, packing operation a period of time are sealed, the gap between them just becomes larger, and just adjusts the nut 11 on side cover 3, side cover at this time
3 squeeze packing, and packing deforms, and internal diameter becomes smaller, and gap just becomes smaller naturally, and packing can also be replaced according to the degree of wear
's.In addition, there is the NMP of liquid in fan casing 6, under the action of impeller 9, liquid is thrown at main shaft 10, in the pressure of gas
Under power, liquid also attempts to leak outside along main shaft 10, a slinger 8 is thus equipped with behind impeller 9, liquid is in slinger 8
Centrifugal force effect under, be thrown on 6 inner wall of casing, liquid flows to seal groove downward along wall, and liquid returns again in the trench
It has arrived in casing 6, without falling on main shaft 10, it is therefore prevented that liquid leaks outside along main shaft 10.Here configuration aspects, mainly
It is embodied on the channel of S-shaped.
Also, 421 side of carrier of second channel 42 extends to side of the carrier 411 backwards to side cover 3 of first passage 41
And it is covered, the bending degree of the two junction is increased from structure, to increase sealing performance between the two
And spreadability.For example, the gas in blower has the tendency that leaking, under the premise of gas passage 4 are not present, it needs elder generation
Break through the carrier 421 of second channel 42；And the carrier 421 of the second channel 42 in the present embodiment, compared to traditional sealing element,
With more curved covering surface, it is covered on the outside of the carrier 411 of first passage 41, the gas punching for making it be difficult to be leaked
It is broken.And here it is even more carrier 421 of the skilful use sealing element as second channel 42, it is the cementability because of sealing element itself to installation
Have a higher requirement, thus can and there are two effects.In addition, second channel 42 and first passage 41 there are certain inclination angle and
The port of second channel 42 extends near side cover 3；Since side cover 3 is installation part, relative to other component more frequently by
Dismounting, meanwhile, the port of second channel 42 is also an installation part, external gas source is needed, therefore the position of two components is concentrated,
Be conducive to installer's centralized operation.
Referring to Fig. 3, a kind of sealing structure is present embodiments provided, the accent edge of the cavity formed by side cover 3 is equipped with circle
Angle 31, the end of inner core relative to cavity bottom notch from accent edge to cavity；The carrier 411 of first passage 41 is towards side
The side of lid 3 is equipped with the protrusion of the accent cooperation of shape and cavity, and protrusion is protruded into cavity and offseted with first seal 2.
In addition to this, the gap 12 of S-shaped is formed between the carrier 421 and side cover 3 of second channel 42；In addition to this, first passage 41
Carrier 411 is arranged in the outside of axle sleeve 1 and offsets with first seal 2；Between the carrier 421 and side cover 3 of second channel 42
It is connected by nut 11；Wherein, first seal 2 and second seal 7 can be compressed by turning nut 11.
In the present embodiment, since sealing element use for a long time can deform, the cavity formed by side cover 3 and first here
It can cooperate between the protrusion of the carrier 411 in channel 41, first seal 2 can be pressed further by when the two is close to each other,
And since first seal 2 is arranged in the cavity, whether lateral or longitudinal direction can all generate shape in pressurized process
Become, and then improves leakproofness.And the gap 12 of S-shaped here is exactly the space of the two deformation, in sealing element pressurized process,
Further reducing for the gap 12 of S-shaped, can also block the path of gas leak.When sealing element just starts to be pressurized, S-shaped
Gap 12 retain, do not block the path of gas leak, but as sealing element is further extruded, the gap 12 of S-shaped by
Gradually start the path of blocking gas leak.And above-mentioned process can be realized by tightening nut 11, and in tightening nut 11
During, second seal 7 can be also extruded, and equally contribute to its sealing performance.
In one embodiment, first seal 2 is the inner core of polytetrafluoroethylene (PTFE) material, and inner core is annular in shape, covers in axle sleeve 1
Outside, and be located in the cavity formed by side cover 3.
In one embodiment, the carrier 421 of second channel 42 be arranged in the carrier 411 of first passage 41 outside and
It offsets with the carrier 411 of first passage 41, first passage 41 and second channel 42 is made to be connected to form gas passage 4.
In one embodiment, the carrier 421 of second channel 42 is polytetrafluoroethylene (PTFE) packing.
In one embodiment, a kind of blower further includes being arranged in side cover 3 and nut 11 including above-mentioned sealing structure
Between pressure sensor, pressure sensor exports corresponding detection letter for detecting pressure between side cover 3 and nut 11
Number.Here pressure sensor can detecte the sealing performance of first seal 2, its concrete principle is, if the first sealing
Part 2 becomes no expansive force because of using for a long time, for pressing its side cover 3 that can also loosen, thus, side cover 3 and nut 11
Between pressure reduce.
Particular embodiments described above has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that the above is only a specific embodiment of the present invention, the protection being not intended to limit the present invention
Range.It particularly points out, to those skilled in the art, all within the spirits and principles of the present invention, that is done any repairs
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of sealing structure, which is characterized in that including the axle sleeve (1) along blower fan main shaft (10), be successively set on the axis
Cover first seal (2), gas passage (4), the second seal (7) in the outside of (1)；
The first seal (2) is filled between the axle sleeve (1) and the side cover (3) of blower；
The gas passage (4) includes connected first passage (41) and second channel (42), and the first passage (41) is led to
The gas direction first passage (41) vertical and described with the length direction of the axle sleeve (1) is connected to the axle sleeve (1), and described
Two channels (42) and the first passage (41) there are the port at certain inclination angle and the second channel (42) extend to it is described
Near side cover (3)；
The carrier (421) of the second channel (42) is the second seal (7), the carrier of the second channel (42)
(421) side extends to the carriers (411) of the first passage (41) backwards to the side of the side cover (3) and is covered,
The carrier (411) of the first passage (41) is set to be located at the load by the second channel (42) backwards to the side of the side cover (3)
In the cavity that body (421) and the axle sleeve (1) are formed；
The carrier (421) of the second channel (42) is equipped with the first annular groove around the axle sleeve (1) backwards to the end of inner core
(4211), first annular groove (4211) is located at interior by the second annular groove (81) for being formed of slinger (8) of blower, and described gets rid of
There are gaps before the end (4111) of the carrier (421) of pendular ring (8) and the second channel (42), make shape between two annular grooves
At the channel of S-shaped.
2. sealing structure according to claim 1, which is characterized in that the first seal (2) is polytetrafluoroethylene (PTFE) material
The inner core of matter, the inner core is annular in shape, covers the outside in the axle sleeve (1), and be located at the cavity formed by the side cover (3)
It is interior.
3. sealing structure according to claim 2, which is characterized in that by the accent side for the cavity that the side cover (3) is formed
Edge is equipped with fillet (31), and the end (4111) of the inner core is recessed relative to the bottom of accent edge to the cavity of the cavity
It falls into；
The carrier (411) of the first passage (41) is equipped with the accent of shape and the cavity towards the side of the side cover (3)
The protrusion of cooperation, and the protrusion is protruded into the cavity and is offseted with the first seal (2).
4. sealing structure according to claim 3, which is characterized in that the carrier (421) of the second channel (42) is arranged
The carrier (411) of the first passage (41) outside and offset with the carrier (411) of the first passage (41), make institute
It states first passage (41) and the second channel (42) is connected to form the gas passage (4).
5. sealing structure according to claim 4, which is characterized in that the carrier (421) of the second channel (42) is poly-
Tetrafluoroethene packing.
6. sealing structure according to any one of claims 1 to 5, which is characterized in that the carrier of the first passage (41)
(411) outside in the axle sleeve (1) is set and is offseted with the first seal (2)；The load of the second channel (42)
It is connected between body (421) and the side cover (3) by nut (11)；Wherein, described can be compressed by turning the nut (11)
One sealing element (2) and the second seal (7).
7. a kind of blower, which is characterized in that further include that setting exists including sealing structure such as claimed in any one of claims 1 to 6
Pressure sensor between the side cover (3) and nut (11), the pressure sensor is for detecting the side cover (3) and described
Pressure between nut (11), and export corresponding detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710321033.XA CN107120306B (en) | 2017-05-09 | 2017-05-09 | A kind of sealing structure and the blower using the sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710321033.XA CN107120306B (en) | 2017-05-09 | 2017-05-09 | A kind of sealing structure and the blower using the sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107120306A CN107120306A (en) | 2017-09-01 |
| CN107120306B true CN107120306B (en) | 2019-02-05 |
Family
ID=59727408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710321033.XA Expired - Fee Related CN107120306B (en) | 2017-05-09 | 2017-05-09 | A kind of sealing structure and the blower using the sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107120306B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4222575A (en) * | 1978-03-23 | 1980-09-16 | Nippon Piston Ring Co., Ltd. | Shaft seal device |
| CN1354328A (en) * | 2000-11-16 | 2002-06-19 | 王玉明 | Combined floating ring sealing device |
| CN1757930A (en) * | 2005-10-27 | 2006-04-12 | 上海交通大学 | Shaft seal device used for ultra low specific rotating speed centrifugal fan |
| JP2010216587A (en) * | 2009-03-17 | 2010-09-30 | Eagle Ind Co Ltd | Sealing device |
| CN102203444A (en) * | 2008-11-04 | 2011-09-28 | 沃依特专利有限责任公司 | Device for sealing a bearing lubricated with a liquid lubricant |
| CN202056080U (en) * | 2011-04-28 | 2011-11-30 | 福建华大电机有限公司 | High-temperature-resistant end cover of motor of axial-flow fan |
| CN102562646A (en) * | 2012-02-24 | 2012-07-11 | 杭州余杭特种风机有限公司 | Hot-gas high-pressure centrifugal blower and sealing method thereof |
| CN202955222U (en) * | 2012-12-12 | 2013-05-29 | 攀钢集团攀枝花钢钒有限公司 | Sealing device |
| CN204900829U (en) * | 2015-08-20 | 2015-12-23 | 深圳市汇合成精密装备有限公司 | Novel mechanical axis is sealed device |
| CN105570301A (en) * | 2016-02-19 | 2016-05-11 | 天津市第二机床有限公司 | High-precision static pressure main shaft |
| CN106050726A (en) * | 2016-07-08 | 2016-10-26 | 重庆美的通用制冷设备有限公司 | Compressor |
-
2017
- 2017-05-09 CN CN201710321033.XA patent/CN107120306B/en not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4222575A (en) * | 1978-03-23 | 1980-09-16 | Nippon Piston Ring Co., Ltd. | Shaft seal device |
| CN1354328A (en) * | 2000-11-16 | 2002-06-19 | 王玉明 | Combined floating ring sealing device |
| CN1757930A (en) * | 2005-10-27 | 2006-04-12 | 上海交通大学 | Shaft seal device used for ultra low specific rotating speed centrifugal fan |
| CN102203444A (en) * | 2008-11-04 | 2011-09-28 | 沃依特专利有限责任公司 | Device for sealing a bearing lubricated with a liquid lubricant |
| JP2010216587A (en) * | 2009-03-17 | 2010-09-30 | Eagle Ind Co Ltd | Sealing device |
| CN202056080U (en) * | 2011-04-28 | 2011-11-30 | 福建华大电机有限公司 | High-temperature-resistant end cover of motor of axial-flow fan |
| CN102562646A (en) * | 2012-02-24 | 2012-07-11 | 杭州余杭特种风机有限公司 | Hot-gas high-pressure centrifugal blower and sealing method thereof |
| CN202955222U (en) * | 2012-12-12 | 2013-05-29 | 攀钢集团攀枝花钢钒有限公司 | Sealing device |
| CN204900829U (en) * | 2015-08-20 | 2015-12-23 | 深圳市汇合成精密装备有限公司 | Novel mechanical axis is sealed device |
| CN105570301A (en) * | 2016-02-19 | 2016-05-11 | 天津市第二机床有限公司 | High-precision static pressure main shaft |
| CN106050726A (en) * | 2016-07-08 | 2016-10-26 | 重庆美的通用制冷设备有限公司 | Compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107120306A (en) | 2017-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201873283U (en) | Shaft end sealing device of spiral conveyer | |
| CN203584878U (en) | Shaft seal structure of waste gas exhaust centrifugal fan | |
| CN204438750U (en) | Combined type back rotary kiln sealing device | |
| CN107120306B (en) | A kind of sealing structure and the blower using the sealing structure | |
| CN203545155U (en) | Self-cleaning airtight air seal machinery | |
| CN205136594U (en) | Seal | |
| CN203703139U (en) | Sealing structure for rotary furnace | |
| CN106352097B (en) | Combined labyrinth sealing device | |
| CN208831247U (en) | A kind of rotary compressor inspiration structure and rotary compressor | |
| CN211739838U (en) | Rotary kiln head and tail negative pressure sealing device | |
| CN208719348U (en) | A kind of anti-beat static seal device of row's epoxy-type | |
| CN210033820U (en) | Melt gear pump and sealing structure thereof | |
| CN201836380U (en) | Floating oil seal | |
| CN202646137U (en) | Shaft-end sealing device of centrifugal type gas compression equipment | |
| CN109269304B (en) | Heat treatment kiln | |
| CN2544146Y (en) | Lip type packing seal piece | |
| CN207701767U (en) | A kind of y-shaped ring | |
| CN207814450U (en) | Elastic sealing ring and sealing mechanism | |
| CN202756611U (en) | Box seal device | |
| CN206112093U (en) | Modular labyrinth seals device | |
| CN202901288U (en) | Delf-seal packing | |
| CN208719350U (en) | A kind of anti-beat static seal device of S type | |
| CN205177534U (en) | A air bleeder and transformer bushing for transformer bushing | |
| CN202955222U (en) | Sealing device | |
| CN220227838U (en) | Blowing type powder sealing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for 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: 20190205 |