CN217335395U - Double-cylinder electromagnetic mixing eddy current speed regulator - Google Patents
Double-cylinder electromagnetic mixing eddy current speed regulator Download PDFInfo
- Publication number
- CN217335395U CN217335395U CN202221069445.1U CN202221069445U CN217335395U CN 217335395 U CN217335395 U CN 217335395U CN 202221069445 U CN202221069445 U CN 202221069445U CN 217335395 U CN217335395 U CN 217335395U
- Authority
- CN
- China
- Prior art keywords
- conductor
- magnet
- mounting
- disc
- cylinder
- 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
- 239000004020 conductor Substances 0.000 claims abstract description 58
- 238000004804 winding Methods 0.000 claims abstract description 17
- 230000005284 excitation Effects 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 230000005674 electromagnetic induction Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 17
- 230000033228 biological regulation Effects 0.000 description 7
- 230000006698 induction Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000005672 electromagnetic field Effects 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Abstract
The utility model discloses a mixed eddy current governor of binocular formula electromagnetism, including the input shaft, the output shaft, the end connection flange dish A of input shaft, flange dish A one side is equipped with the cover and locates the electrically conductive sliding ring on the input shaft, the end connection of output shaft has flange dish B, flange dish B's relative inboard is provided with the conductor yoke, the outer anchor ring of conductor yoke, the interior anchor ring is connected with the conductor urceolus respectively, the conductor inner tube, flange dish A's relative inboard is connected with the magnet mounting disc, set up a plurality of groups and be the mounting groove of annular arrangement on the magnet mounting disc, the electromagnet of magnetic pole alternating arrangement has been installed in each mounting groove in proper order, the permanent magnet, be provided with excitation coil winding on each electromagnet, the magnet mounting disc stretches into the clearance between conductor urceolus and the conductor inner tube and does not meet with conductor urceolus, conductor inner tube, conductor yoke; the utility model discloses reduced electric excitation loss, realized carrying out the transmission of moment of torsion through the air gap between motor and the load, operating efficiency is higher, moves more steadily.
Description
Technical Field
The utility model relates to a magnetic coupling transmission technical field, specifically speaking especially relates to a double-cylinder electromagnetism mixes vortex speed regulator.
Background
The traditional mechanical transmission structure mainly comprises a gear structure, a belt pulley mechanism, a chain structure, a worm gear and worm, and the like, and the transmission mechanisms are directly and rigidly connected with a load, so that friction wear, vibration, noise and the like exist in the transmission process. The research and application of the magnetic coupler have wide space and value. For example, a permanent magnet eddy current governor is a non-contact type speed regulating device developed based on the principle of electromagnetic induction, and mainly functions to realize the motion and power transmission between a motor driving shaft and a load output shaft in a motion system. The working principle is that when the input shaft drives the permanent magnet disc to rotate, the input shaft and the output shaft form a rotating speed difference, the copper disc cuts a magnetic induction line emitted by a permanent magnet in the permanent magnet disc to generate induced electromotive force and generate eddy current in the copper disc, the eddy current generates a counter induction magnetic field to interact with a magnetic field generated by the permanent magnet, so that torque transmission between the copper disc and the permanent magnet is realized, the output shaft is driven to rotate, and the rotating speed and the torque of the output shaft are controlled by changing the size of an air gap between the copper disc and the permanent magnet. Another application of permanent magnet drive technology is the electrically excited eddy current drive, which uses magnetic material, which is a feature of the device. The hysteresis material is distinguished from the permanent magnet material in that the former is easily changed in polarity, so that torque is easily adjusted, providing excellent workability, and is widely used at present. But its rated torque is small because at rated torque, the clutch begins to slip, the hysteresis material absorbs energy from the system, and the kinetic energy becomes heat due to the change of magnetic poles, and this part of heat should be dissipated and cooled in time. The torque regulation control of the electrically excited eddy current transmission is provided by the field coil, requires a dc power supply and a control system, which is the best choice in an automatic control system. The integration of the magnetic device with the sensor and microprocessor may be automated for certain processes. For example, when the diameter of the winding machine is increased, the torque is changed correspondingly by controlling the change of the exciting current, so as to ensure that constant tension is obtained.
The permanent magnet transmission has no excitation consumption, but the air gap is adjusted by a mechanical mode or a servo mechanism, so that the use and the operation are inconvenient. The electric excitation transmission is convenient to adjust, but the electric excitation power consumption is large. In addition, the traditional electro-magnetic transmission adopts a claw pole structure and a disc type structure, so that the speed regulation can be realized, but the speed regulation efficiency is low, the speed regulation range is small, the speed regulation is not stable enough, and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a double-cylinder electromagnetism mixes vortex speed regulator to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model discloses a following technical means realizes:
a double-cylinder electromagnetic mixing vortex speed regulator comprises an input shaft and an output shaft, wherein the end part of the input shaft is connected with a flange A, one side of the flange A is provided with a conductive slip ring sleeved on the input shaft, the end part of the output shaft is connected with a flange B, a conductor yoke is arranged on the opposite inner side of the flange B, the outer ring surface and the inner ring surface of the conductor yoke are respectively connected with a conductor outer cylinder and a conductor inner cylinder, the opposite inner side of the flange A is connected with a magnet mounting disc which is provided with a plurality of groups of mounting grooves which are arranged in an annular shape, electromagnets and permanent magnets with alternately arranged magnetic poles are sequentially arranged in each mounting groove, each electromagnet is provided with a field coil winding, the magnet mounting plate extends into a gap between the outer conductor cylinder and the inner conductor cylinder and is not connected with the outer conductor cylinder, the inner conductor cylinder and the conductor yoke.
Furthermore, the magnet mounting disc is of a polygonal structure similar to a cylinder, a plurality of groups of mounting grooves are formed in the magnet mounting disc, the number of the groups of the mounting grooves is even, electromagnets and permanent magnets which are sequentially and alternately mounted are installed in each mounting groove, each electromagnet and each permanent magnet are installed in the mounting groove through being matched with a fixed sleeve, a magnet disc cover is installed on each mounting groove, and a wiring groove for electrically connecting a conductive sliding ring and a field coil winding through a lead is formed in each magnet disc cover.
Further, the magnet mounting disc is a cylindrical twelve-sided body, threaded holes connected with the flange plate A are formed in the magnet mounting disc, twelve groups of mounting grooves used for mounting magnets are formed in the magnet mounting disc, fillets are formed in the vertical opposite boundaries in the mounting grooves, connecting threaded holes fixedly connected with the magnet disc cover are formed in the four corners of the mounting grooves, and wiring through holes for connection and electrification of adjacent magnet exciting coil windings are formed in the mounting grooves.
Furthermore, a groove is formed in the middle of the magnet disc cover, a rectangular wiring groove for accommodating a wire is formed in the bottom of the magnet disc cover, and threaded connecting holes corresponding to the magnet mounting disc are formed in the four corners of the magnet disc cover respectively.
Furthermore, the fixed sleeve is a cube provided with a groove, and the grooved end face of the fixed sleeve is symmetrically provided with square through holes for connecting the electrified conducting wires.
Furthermore, the outer conductor cylinder and the inner conductor cylinder are both made of copper materials.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses with the driven high power density of permanent magnetism and the driven magnetic field adjustable combination of electric excitation vortex, full play advantage between them has overcome respective shortcoming, has reduced the electric excitation loss. Through the interaction of the high-strength permanent magnet pole, the adjustable electromagnetic pole, the outer conductor cylinder and the inner conductor cylinder, the torque transmission between the motor and the load through an air gap is realized; so that the motor and the load can keep independent operation without mechanical connection. The utility model discloses an adjusting excitation coil winding's electric current size and the increase and decrease of energized winding number and the size of permanent magnet, realizing the increasing magnetism and the weak magnetism of air gap magnetic field to obtain the controllable transmission moment of torsion of bigger scope, in order to obtain controllable output torque and output, thereby realize output torque and output's non-contact and adjust, its practicality is bigger, and operating efficiency is higher. In addition, the novel double-cylinder type structure is adopted, the space utilization rate is high, the working performance of the double-cylinder type structure is better than that of a traditional single cylinder or single disc type structure, the S pole and the N pole of each magnet can be utilized, the inner cylinder of the outer cylinder generates vortex corresponding to the two poles of the magnet, the magnetic energy of the magnet is utilized to a greater degree, the magnet can transmit larger output torque, the electromagnetic hybrid speed regulation is more stable than pure excitation speed regulation, and the operation is more stable.
Description of the drawings:
FIG. 1 is a schematic view of the product structure of the present invention;
FIG. 2 is a schematic view of the magnetic pole of the product of the present invention;
FIG. 3 is a schematic structural view of a magnet mounting plate with a partial structure according to the present invention;
FIG. 4 is a schematic view of a part of the structure of the product of the present invention;
FIG. 5 is a schematic view of the product of the present invention showing a partially structured magnet mounting plate cover;
fig. 6 is a schematic view of a fixing sleeve of the product part structure of the present invention.
Wherein: 1. the magnetic body installation plate comprises a magnetic body installation plate body 101, installation grooves 102, wiring grooves 103, connection threaded holes 104, wiring through holes 105, square through holes 2, conductor outer cylinders 3, conductor inner cylinders 4, excitation coil windings 5, electromagnets 6, permanent magnets 7, conductor yokes 8, conductive slip rings 9, magnetic body plate covers 10, fixing sleeves 11, wires 12, flange plates A and 13, flange plates B and 14, input shafts 15 and output shafts.
The specific implementation mode is as follows:
in order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described with reference to the following embodiments:
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Do the utility model discloses one of them embodiment: see the drawings.
In the embodiment, a double-cylinder electromagnetic hybrid eddy current governor comprises an input shaft 14 and an output shaft 15, wherein the end of the input shaft 14 is connected with a flange A12, one side of the flange A12 is provided with a conductive slip ring 8 sleeved on the input shaft, the end of the output shaft 15 is connected with a flange B13, the opposite inner sides of the flange B13 are provided with a conductor yoke 7, the outer ring surface and the inner ring surface of the conductor yoke 7 are respectively connected with a conductor outer cylinder 2 and a conductor inner cylinder 3, the opposite inner sides of the flange A12 are connected with a magnet mounting disc 1, the magnet mounting disc 1 is provided with a plurality of groups of mounting grooves 101 which are arranged in a ring shape, electromagnets 5 and permanent magnets 6 with alternately arranged magnetic poles are sequentially arranged in each mounting groove 101, each electromagnet 5 is provided with a magnet exciting coil winding 4, and the magnet mounting disc 1 extends into the gap between the conductor outer cylinder 2 and the conductor inner cylinder 3 and is not connected with the conductor outer cylinder 2, The conductor inner cylinder 3 and the conductor yoke 7 are connected, in the embodiment of the utility model, the input shaft 14, the conductive slip ring 8, the flange A12, the magnet mounting plate 1, the electromagnet 5, the permanent magnet 6 and the excitation coil winding 4 form the driving rotor of the transmission structure, the output shaft 15, the flange B13, the conductor yoke 7, the conductor outer cylinder 2 and the conductor inner cylinder 3 form the driven rotor of the transmission structure, the driving rotor is powered by the motor shaft, a gap exists between the driving rotor and the driven rotor, both of which can freely and independently rotate, when the driving rotor rotates, the permanent magnet between the adjacent electromagnets generates a constant magnetic field, the electrified electromagnetic winding can generate a variable magnetic field around the electromagnet, the positive and negative poles of the electromagnetic winding can be changed to enable the two adjacent electromagnets to generate different magnetic poles, thereby each group of electromagnets forms a larger electromagnetic field, the alternating magnetic field can generate eddy currents in the inner copper cylinder and the outer copper cylinder of the driven rotor, and the eddy currents generate a counter-induction magnetic field to interact with an electromagnetic field, so that the driven rotor rotates in the same direction as the driving rotor, and electromagnetic hybrid transmission is achieved.
In the embodiment of the utility model, magnet mounting disc 1 is the polygon form structure of class cylinder, magnet mounting disc 1 is last to have seted up a plurality of groups mounting groove 101, and the group number of mounting groove 101 is the even number, each the built-in electromagnet 5, the permanent magnet 6 that is equipped with in proper order alternate installation of mounting groove 101, each electromagnet 5, permanent magnet 6 are equallyd divide and are installed in mounting groove 101 through cooperating with fixed sleeve 10 respectively, each mounting groove 101 has installed magnet dish lid 9 respectively, and magnet dish lid 9 is seted up and is supplied electrically conductive sliding ring 8, excitation coil winding 4 to pass through the trough 102 that wire 11 electrical property meets, in the embodiment of the utility model, according to the needs of speed governing work, electromagnet 5 can mix the collocation wantonly with permanent magnet 6. Because the driving rotor needs to rotate at a high speed to enable the driven rotor to cut the magnetic induction lines to generate eddy currents, in order to avoid the phenomenon that a lead 11 is in cross short circuit in high-speed rotation and the circuit is damaged, and therefore the device cannot operate normally, a specially-made magnet disc cover 9 and a fixed sleeve 10 are used for improving the circuit problem, the lead 11 is fixedly wired through the magnet disc cover 9 and connected with a conductive slip ring 8, and the driving rotor is connected with a motor shaft through a flange A12. If the current is within the allowable range of the load, the speed regulating device not only can regulate the transmission torque by regulating the exciting current, but also can enlarge the regulating threshold by increasing or decreasing the electrified number of the exciting coil.
The utility model discloses an in the concrete embodiment, magnet mounting disc 1 is the twelve sides body of class cylinder, set up the screw hole (not shown in the figure) of being connected with ring flange A12 on the magnet mounting disc 1, magnet mounting disc 1 has seted up twelve groups and is used for installing the mounting groove 101 of magnet, the relative vertical border in inside of mounting groove 101 is equipped with the radius angle, the four corners department of mounting groove 101 sets up and is connected fixed connecting thread hole 103 with magnet plate lid 9, set up the line through-hole 104 of walking that supplies adjacent excitation coil winding 4 to connect the circular telegram in the mounting groove 101.
In the embodiment of the present invention, a groove 91 is formed in the middle of the magnet disc cover 9, a wire slot 102 for installing the wire 11 is provided at the bottom of the magnet disc cover 9, and threaded connection holes 92 corresponding to the magnet mounting disc 1 are respectively provided at four corners of the magnet disc cover 9.
In the embodiment of the present invention, the fixing sleeve 10 is a cube with a groove, and the groove end face of the fixing sleeve 10 is symmetrically provided with a square through hole 105 for connecting an electric wire.
In the embodiment of the present invention, the outer conductor barrel 2 and the inner conductor barrel 3 are both made of copper material, the copper conductor barrel is used for cutting the magnetic induction line generated by the electromagnet to generate an eddy current in the copper conductor barrel and further generate a counter magnetic field interacting with the electromagnetic field, so as to achieve the purpose of contactless power transmission, the copper conductor barrel is divided into the inner conductor barrel 3 and the outer conductor barrel 2, the dual-barrel design improves the utilization rate of the electromagnet magnetic field and the permanent magnet magnetic field, the outer wall of the inner conductor barrel 3 and the inner wall of the outer conductor barrel 2 all generate the counter magnetic field, and transmit torque, the inner and outer conductor barrels are all connected to the yoke 7, and are connected to the output shaft 15 through the flange B13, the dual-barrel structure can improve the utilization rate of the magnetic field, and increase the output torque.
The utility model discloses a specific embodiment falls into the utility model discloses within the claim protection scope, for the utility model discloses a specific lower implementation scope of characteristic part, specific embodiment protection content is only for the utility model discloses the description of claim protection scope, the utility model discloses protection scope is not more than specific embodiment protection content, and specific embodiment protection content should not be understood as the restriction to the utility model discloses claim protection scope.
Claims (6)
1. A double-cylinder electromagnetic mixing vortex speed regulator is characterized in that: the electromagnetic induction type electromagnetic clutch comprises an input shaft and an output shaft, wherein the end part of the input shaft is connected with a flange A, one side of the flange A is provided with a conductive slip ring sleeved on the input shaft, the end part of the output shaft is connected with a flange B, the opposite inner side of the flange B is provided with a conductor yoke, the outer ring surface and the inner ring surface of the conductor yoke are respectively connected with a conductor outer cylinder and a conductor inner cylinder, the opposite inner side of the flange A is connected with a magnet mounting disc, a plurality of groups of mounting grooves which are arranged in an annular mode are formed in the magnet mounting disc, electromagnets and permanent magnets with alternately arranged magnetic poles are sequentially arranged in each mounting groove, each electromagnet is provided with a magnet exciting coil winding, and the magnet mounting disc extends into a gap between the conductor outer cylinder and the conductor inner cylinder and is not connected with the conductor outer cylinder, the conductor inner cylinder and the conductor yoke.
2. The dual-drum electromagnetic hybrid eddy current governor of claim 1, wherein: the magnetic mounting disc is of a cylindrical polygonal structure, a plurality of groups of mounting grooves are formed in the magnetic mounting disc, the number of the groups of the mounting grooves is even, electromagnets and permanent magnets which are alternately mounted in sequence are mounted in each mounting groove, each electromagnet and each permanent magnet are mounted in the mounting groove through being matched with a fixed sleeve, a magnetic disc cover is mounted on each mounting groove, and a wiring groove for electrically connecting a conductive sliding ring and a field coil winding through a wire is formed in each magnetic disc cover.
3. The dual-drum electromagnetic hybrid eddy current governor of claim 2, wherein: the magnet mounting disc is a cylindrical twelve-sided body, threaded holes connected with a flange plate A are formed in the magnet mounting disc, twelve groups of mounting grooves used for mounting magnets are formed in the magnet mounting disc, chamfering angles are formed in the vertical relative boundary of the inside of each mounting groove, connecting threaded holes fixedly connected with a magnet disc cover are formed in the four corners of each mounting groove, and wiring through holes for connection and electrification of adjacent excitation coil windings are formed in the mounting grooves.
4. The dual-drum electromagnetic hybrid eddy current governor of claim 2, wherein: the middle part of the magnet disc cover is provided with a groove, the bottom of the magnet disc cover is provided with a rectangular wiring groove for accommodating a wire, and four corners of the magnet disc cover are respectively provided with a threaded connecting hole corresponding to the magnet mounting disc.
5. The dual-drum electromagnetic hybrid eddy current governor of claim 2, wherein: the fixing sleeve is a cube provided with a groove, and square through holes for connecting electrified leads are symmetrically formed in the end face of the groove of the fixing sleeve.
6. The dual-drum electromagnetic hybrid eddy current governor of claim 1, wherein: the outer conductor cylinder and the inner conductor cylinder are both made of copper materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221069445.1U CN217335395U (en) | 2022-05-06 | 2022-05-06 | Double-cylinder electromagnetic mixing eddy current speed regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221069445.1U CN217335395U (en) | 2022-05-06 | 2022-05-06 | Double-cylinder electromagnetic mixing eddy current speed regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217335395U true CN217335395U (en) | 2022-08-30 |
Family
ID=82951781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221069445.1U Expired - Fee Related CN217335395U (en) | 2022-05-06 | 2022-05-06 | Double-cylinder electromagnetic mixing eddy current speed regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217335395U (en) |
-
2022
- 2022-05-06 CN CN202221069445.1U patent/CN217335395U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104767357A (en) | Winding type permanent magnet coupling transmission device | |
| US10122309B2 (en) | Generator comprising a variable speed magnetic gear | |
| CN102647058A (en) | Power equipment | |
| CN105915021B (en) | A kind of brushless type composite excitation permanent magnet eddy speed regulating device | |
| CN201918876U (en) | Disc-type wheel motor | |
| CN108512380B (en) | Annular winding double-rotor permanent magnet synchronous motor with electromagnetic linkage device | |
| CN102055291A (en) | Magnetic field modulation type Halbach permanent magnetic direct drive motor | |
| CN201298803Y (en) | Speed regulation shaft coupling | |
| CN101951047A (en) | Disk permanent magnet composite brushless motor | |
| CN217335395U (en) | Double-cylinder electromagnetic mixing eddy current speed regulator | |
| CN108964387B (en) | The double-deck standard squirrel cage conductor rotor high torque density permanent-magnet speed governor | |
| CN104682621A (en) | Axial magnetic field slip synchronization-type double-direct wind power generator | |
| CN210405045U (en) | Axial parallel composite motor | |
| CN110299815B (en) | Coaxial dual-rotor variable-speed electromagnetic driver | |
| CN208046416U (en) | A kind of magneto | |
| CN101621224B (en) | Coaxial inner-outer coil electric motor | |
| CN106374709B (en) | Motor | |
| CN204597718U (en) | The two straight wind-driven generator of axial magnetic field slippage synchronous mode | |
| CN111030410A (en) | Novel permanent magnet synchronous motor | |
| CN207801664U (en) | The transmission system and slotless electric machines of slotless electric machines | |
| CN114696568A (en) | Mixed excitation eddy current speed regulation device | |
| CN206237278U (en) | Motor | |
| CN202405972U (en) | Disc-type permanent magnet cursor motor | |
| CN107026545B (en) | A kind of hybrid vehicle brushless Double-stator motor | |
| SU1644314A1 (en) | Electric machinery set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220830 |