CN207942263U - A kind of convenient environment friendly stone material grinding device - Google Patents
A kind of convenient environment friendly stone material grinding device Download PDFInfo
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- CN207942263U CN207942263U CN201820398354.XU CN201820398354U CN207942263U CN 207942263 U CN207942263 U CN 207942263U CN 201820398354 U CN201820398354 U CN 201820398354U CN 207942263 U CN207942263 U CN 207942263U
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- stone material
- fixedly mounted
- fixedly connected
- fixed
- sliding slot
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Abstract
The utility model discloses a kind of convenient environment friendly stone material grinding devices, including device body, device body is fixedly connected with pedestal, base bottom is fixedly connected with support column, column bottom is supported to be equipped with universal wheel, device body outer wall end face is equipped with hermatic door, control panel is fixedly mounted on hermatic door, top is equipped with fixed plate in device body, the recycling suction nozzle of fixed plate lower face connects dust collecting box by recovery tube, motor is fixedly mounted in dead plate upper end right side of face, the output end of motor is fixedly connected with threaded rod, threaded rod is threadedly coupled slide plate, hydraulic cylinder is equipped with below fixed plate, polishing motor and polishing pad, vibration-damped table is fixedly mounted in device body bottom, sliding slot one is fixedly mounted in vibration-damped table upper surface, one upside of sliding slot is equipped with fixed station.The utility model is simple in structure easy to operate, and by grip block by the fixation of stone material to be polished, vibration-damped table can be placed on stone material the impact force on fixed station into row buffering.
Description
Technical field
The present invention relates to a kind of stone material grinding device technical field, specifically a kind of convenient environment friendly stone material grinding device.
Background technology
Stone material is a kind of high-grade construction decoration material, is seen everywhere, using and its extensively.Common stone material currently on the market
Mainly there are marble, granite, terrazzo, four kinds of compound stone.No matter lithotome or synthesis stone, general surface is all compared
It is coarse, need polishing that can just obtain coloured and dazzling effect.Existing stone material grinding device is in the process polished stone material
Effect that is mobile and then influencing stone material polishing easily occurs for middle stone material, at the same existing stone material grinding device if necessary to stone material not
If being polished with position, if stone material polishing pad cannot carry out position adjustment, then manpower is needed to carry stone material, no
It is only time-consuming and laborious to be also greatly reduced production efficiency, when stone material to be placed on grinding device, since stone material is heavier, it is placed on
The impact force of stone material damages polishing table when on polishing table, reduces its service life, and stone material will produce a large amount of when polishing
Dust, dust directly sucks body by staff can induce a variety of diseases, and dust is raised in air, is polluted the environment,
Therefore a kind of stone material grinding device of convenient and efficient environmental protection is needed, to meet the needs of people's production.
Invention content
The purpose of the present invention is to provide a kind of convenient environment friendly stone material grinding devices, to solve to propose in above-mentioned background technology
The problem of.
To achieve the above object, the present invention provides the following technical solutions：
A kind of convenient environment friendly stone material grinding device, including device body, described device ontology are fixedly connected with pedestal, the bottom
Seat is hollow structure, and collecting tank is equipped in the pedestal, and pull handle is equipped on the right side of the pedestal, and the base bottom, which is fixed, to be connected
Support column is connect, the support column is symmetrical arranged, and the support column bottom is equipped with universal wheel, and described device body outer wall end face is equipped with
Hermatic door, the hermatic door are symmetrical arranged, and for the hermatic door by hinge connection ontology, the hermatic door is transparent knot
Control panel is fixedly mounted on the hermatic door in structure, and handle is fixedly mounted on the hermatic door, and top is set in described device ontology
Have a fixed plate, suction nozzle is hingedly recycled in the fixed plate lower face, the recycling suction nozzle be equipped with it is multiple, the recycling suction nozzle by time
Closed tube connects dust collecting box, and the dust collecting box is fixedly installed in device body outer right wall, is connected on the recovery tube
Exhaust fan, the exhaust fan are electrically connected control panel, and the output end of the exhaust fan connects dust collecting box by recovery tube
Bottom, the dust collection chamber interior wall are fixedly connected with filter bag, gas outlet, the fixation are equipped on the right side of the dust collecting box upper end
Motor is fixedly mounted in plate fixed connection apparatus inner body wall, the dead plate upper end right side of face, and the motor connects control panel,
The output end of the motor is fixedly connected with threaded rod, and the threaded rod is equipped with external screw thread, and the threaded rod is rotated by bearing to be connected
Connection device inner body wall, the bearing are fixedly mounted in the bearing block of device body inner wall, and the threaded rod, which is threadedly coupled, to be slided
Plate, the slide plate slides connect sliding slot, and the sliding slot is symmetrical arranged, and the sliding slot is fixedly mounted in fixed plate, described symmetrical
Straight slot is equipped between the sliding slot of setting, the slide plate is set in straight slot, and limited block is fixedly mounted in described straight slot or so end face, described
Limited block is pressure inductor, and the pressure inductor connects control panel, and hydraulic cylinder, institute is fixedly mounted in the slide plate lower face
Hydraulic cylinder connection control panel is stated, the output end of the hydraulic cylinder is fixedly connected with hydraulic column, and the lower face of the hydraulic column is fixed
Connection polishing motor, the polishing motor connect control panel, and the output end for polishing motor is fixedly connected with shaft, described turn
The lower face of axis is fixedly connected with polishing pad, and bottom is equipped with port in described device ontology, and described device body bottom portion is fixedly mounted
Sliding slot one is fixedly mounted in vibration-damped table, the vibration-damped table upper surface, and one upside of the sliding slot is equipped with fixed station, the fixed station sliding
Sliding slot one is connected, the fixed station lower face is fixedly mounted convex block, tight fixed bolt, the fixed station are threadedly coupled on the convex block
Sliding slot three is fixedly mounted in upper surface, and the sliding slot three is slidably connected grip block by sliding block one, and the sliding block one is equipped with tightening
Bolt, the grip block are symmetrical arranged, and clamping tooth is uniformly fixedly mounted in the plate face to oppose on the inside of the grip block.
As a further solution of the present invention：The support column is equipped with the brake apparatus of universal wheel.
As further scheme of the invention：The dust collecting box bottom is equipped with collecting tank, the dust collecting box
Right side is equipped with pull handle.
As further scheme of the invention：Internal thread is equipped in the through-hole that the slide plate is connect with threaded rod.
As further scheme of the invention：Collection in the port pass-through facility body bottom portion and connect base
Slot.
As further scheme of the invention：The vibration-damped table include sliding panel, fixed frame, vibration damping sheet, telescopic rod and
Damping spring, the sliding plate end face are slidably connected fixed frame, and the vibration damping sheet is fixedly connected with sliding panel and fixed frame, described to stretch
Contracting bar is fixedly connected with vibration damping sheet, is socketed damping spring outside the telescopic rod, the damping spring both ends of the surface are fixedly connected with vibration damping sheet.
As further scheme of the invention：The length of the sliding block one is more than the width of grip block.
As further scheme of the invention：The clamping tooth is rubber material.
Compared with prior art, the beneficial effects of the invention are as follows：The configuration of the present invention is simple is easy to operate, by fixed station
The fixation of stone material to be polished is ensured that polishing quality, the setting of vibration-damped table can be placed on fixed station stone material by grip block
Impact force improves the service life of fixed station and the stability of device into row buffering, and polishing pad can move up and down, more
It is convenient to polish stone material, the movement to stone material is avoided, the time is more saved, improves grinding efficiency, it can equipped with dust collecting box
The dust generated when with by polishing is collected, and has not only been protected environment but also has been protected the health of operator.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of convenient environment friendly stone material grinding device.
Fig. 2 is a kind of convenient environment friendly stone material grinding device front view.
Fig. 3 is a kind of structural schematic diagram of vibration-damped table in convenient environment friendly stone material grinding device.
Fig. 4 is a kind of structural schematic diagram of dust collecting box in convenient environment friendly stone material grinding device.
Fig. 5 is dead plate upper end face mounting structure vertical view in a kind of convenient environment friendly stone material grinding device.
Fig. 6 is the structural schematic diagram that fixed station is overlooked in a kind of convenient environment friendly stone material grinding device.
In figure：1- device bodies；2- pedestals；3- support columns；4- universal wheels；5- collecting tanks；51- ports；6- pull handles；
7- dust collecting boxes；8- motors；9- threaded rods；10- slide plates；11- bearings；12- fixed plates；13- recycles suction nozzle；14- hydraulic cylinders；
15- hydraulic columns；16- polishing motors；17- shafts；18- polishing pads；19- vibration-damped tables；20- fixed stations；21- sliding slots one；22- is convex
Block；23- sliding blocks one；24- grip blocks；25- hinges；26- control panels；27- hermatic doors；28- handles；29- recovery tubes；30- takes out
Wind turbine；The gas outlets 31-；32- filter bags；33- sliding slots two；34- limited blocks；35- sliding slots three；36- tight fixed bolts；37- clamping tooths；
38- sliding panels；39- fixed frames；40- vibration damping sheets；41- telescopic rods；42- damping springs.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig.1~6, in the embodiment of the present invention, a kind of convenient environment friendly stone material grinding device, including device body 1, institute
It states device body 1 and is fixedly connected with pedestal 2, the pedestal 2 is hollow structure, and collecting tank 5, the pedestal 2 are equipped in the pedestal 2
Right side is equipped with pull handle 6, and the pull handle 6 can facilitate the dust pull-out processing in collecting tank 5,2 bottom of the pedestal
Portion is fixedly connected with support column 3, and the support column 3 is symmetrical arranged, and 3 bottom of the support column is equipped with universal wheel 4, the support column 3
It is equipped with the brake apparatus of universal wheel 4,1 outer wall end face of described device ontology is equipped with hermatic door 27, and the hermatic door 27 is symmetrically set
It sets, for the hermatic door 27 by 25 attachment device ontology 1 of hinge, the hermatic door 27 is transparent configuration, on the hermatic door 27
Control panel 26 is fixedly mounted, handle 28 is fixedly mounted on the hermatic door 27, top is equipped with fixed plate in described device ontology 1
12, suction nozzle 13 is hingedly recycled in 12 lower face of the fixed plate, and the recycling suction nozzle 13 is equipped with multiple, and the recycling suction nozzle 13 passes through
Recovery tube 29 connects dust collecting box 7, and the dust collecting box 7 is fixedly installed in 1 outer right wall of device body, the recovery tube
Exhaust fan 30 is connected on 29, the exhaust fan 30 is electrically connected control panel 26, and the output end of the exhaust fan 30 passes through recycling
Pipe 29 connects 7 bottom of dust collecting box, and 7 bottom of the dust collecting box is equipped with collecting tank 5, and 7 right side of the dust collecting box is set
There are pull handle 6,7 inner wall of the dust collecting box to be fixedly connected with filter bag 32, outlet is equipped on the right side of 7 upper end of the dust collecting box
Motor 8, institute is fixedly mounted in mouth 31,12 fixed connection apparatus ontology of the fixed plate, 1 inner wall, 12 upper surface of fixed plate right side
It states motor 8 and connects control panel 26, the output end of the motor 8 is fixedly connected with threaded rod 9, and the threaded rod 9 is equipped with external screw thread,
The threaded rod 9 is fixedly mounted on 1 inner wall of device body by 11 rotary connecting device ontology of bearing, 1 inner wall, the bearing 11
Bearing block in, the threaded rod 9 is threadedly coupled slide plate 10, and through-hole that the slide plate 10 connect with threaded rod 9 is interior equipped with interior spiral shell
Line, the slide plate 10 are slidably connected sliding slot 33, and the sliding slot 33 is symmetrical arranged, and the sliding slot 33 is fixedly mounted on fixed plate 12
On, straight slot is equipped between the symmetrically arranged sliding slot 33, the slide plate 10 is set in straight slot, and described straight slot or so end face is fixed
Limited block 34 is installed, the limited block 34 is pressure inductor, and the pressure inductor connects control panel 26, passes through limited block
34 can control the displacement distance of slide plate 10, and hydraulic cylinder 14 is fixedly mounted in 10 lower face of the slide plate, and the hydraulic cylinder 14 connects
The output end of control panel 26, the hydraulic cylinder 26 is fixedly connected with hydraulic column 15, and the lower face of the hydraulic column 15 is fixedly connected
Polishing motor 16, the polishing motor 16 connect control panel 26, and the output end of the polishing motor 16 is fixedly connected with shaft 17,
The lower face of the shaft 17 is fixedly connected with polishing pad 18, and bottom is equipped with port 51 in described device ontology 1, and the port 51 passes through
Collecting tank 5 in 1 bottom connect base 2 of exchange device ontology, vibration-damped table 19 is fixedly mounted in 1 bottom of described device ontology, described to subtract
It includes sliding panel 38, fixed frame 39, vibration damping sheet 40, telescopic rod 41 and damping spring 42 to shake platform 19, and 38 end face of the sliding panel is slided
Dynamic Connection Bracket 39, the vibration damping sheet 40 are fixedly connected with sliding panel 38 and fixed frame 39, and the telescopic rod 41, which is fixedly connected, to be subtracted
Piece 40 is shaken, is socketed damping spring 42 outside the telescopic rod 41,42 both ends of the surface of the damping spring are fixedly connected with vibration damping sheet 40, described
Sliding slot 1 is fixedly mounted in 19 upper surface of vibration-damped table, and one 21 upside of the sliding slot is equipped with fixed station 20, and the fixed station 20 slides
Sliding slot 1 is connected, 20 lower face of the fixed station is fixedly mounted convex block 22, tight fixed bolt 36 is threadedly coupled on the convex block 22,
By the rotary squeezing sliding slot 1 in the threaded hole in convex block 22 of tight fixed bolt 36, so that sliding slot 1 and fixed station 20
It is fixed, sliding slot 3 35 is fixedly mounted in 20 upper surface of the fixed station, and the sliding slot 3 35 is slidably connected by sliding block 1
Grip block 24, the length of the sliding block 1 are more than the width of grip block 24, and the sliding block 1 is equipped with tight fixed bolt 36, institute
It states grip block 24 to be symmetrical arranged, clamping tooth 37, the clamping is uniformly fixedly mounted in the plate face that 24 inside of the grip block opposes
Tooth 37 is rubber material.
The present invention operation principle be：Stone material is placed on fixed station 20, the mobile grip block on sliding slot 3 35 is passed through
38, stone material is fixed, sliding block 1 is fixed using tight fixed bolt 36, can be moved forward and backward by sliding slot 1 solid
Determine platform 20, select position to be polished, sliding slot 1 and fixed station 20 can be consolidated by the tight fixed bolt 36 on convex block 22
Fixed, 20 bottom of fixed station is equipped with vibration-damped table 19, and the impact force on fixed station 20 can be placed on to stone material into row buffering, is improved solid
Determine the service life of platform and the stability of device, motor 8, hydraulic cylinder 14, polishing motor 16 are controlled by control panel 26 and takes out
Wind turbine 30 works, and can move up and down polishing pad 18, until waiting for stone material polishing position, the work of exhaust fan 30 generates polishing
In dust collection to dust collecting box 7, the rubble dust generated in device body 1 is collected into the receipts in pedestal 2 by port 51
Collect in slot 5, ensure the clean hygiene of device, by the dust collection of generation not only environmental protection but also protection operator is healthy, passes through dress
Setting the hermatic door 27 of the transparent configuration of 1 front end of ontology can facilitate observation polishing situation, control panel 26 to be set on hermatic door 27,
Facilitate control to operate, device can be facilitated to move set on universal wheel 4.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (8)
1. a kind of convenient environment friendly stone material grinding device, including device body（1）, which is characterized in that described device ontology（1）It is fixed
Connect base（2）, the pedestal（2）For hollow structure, the pedestal（2）It is interior to be equipped with collecting tank（5）, the pedestal（2）Right side
Equipped with pull handle（6）, the pedestal（2）Bottom is fixedly connected with support column（3）, the support column（3）It is symmetrical arranged, the branch
Dagger（3）Bottom is equipped with universal wheel（4）, described device ontology（1）Outer wall end face is equipped with hermatic door（27）, the hermatic door（27）
It is symmetrical arranged, the hermatic door（27）Pass through hinge（25）Attachment device ontology（1）, the hermatic door（27）For transparent configuration,
The hermatic door（27）Upper fixed installation control panel（26）, the hermatic door（27）Upper fixed installation handle（28）, the dress
Set ontology（1）Interior top is equipped with fixed plate（12）, the fixed plate（12）Hingedly recycle suction nozzle in lower face（13）, the recycling suction
Head（13）Equipped with multiple, the recycling suction nozzle（13）Pass through recovery tube（29）Connect dust collecting box（7）, the dust collecting box
（7）It is fixedly installed in device body（1）Outer right wall, the recovery tube（29）Upper connection exhaust fan（30）, the exhaust fan
（30）It is electrically connected control panel（26）, the exhaust fan（30）Output end pass through recovery tube（29）Connect dust collecting box
（7）Bottom, the dust collecting box（7）Inner wall is fixedly connected with filter bag（32）, the dust collecting box（7）It is equipped with out on the right side of upper end
Gas port（31）, the fixed plate（12）Fixed connection apparatus ontology（1）Inner wall, the fixed plate（12）Fixed peace on the right side of upper surface
Fill motor（8）, the motor（8）Connect control panel（26）, the motor（8）Output end be fixedly connected with threaded rod（9）, institute
State threaded rod（9）Equipped with external screw thread, the threaded rod（9）Pass through bearing（11）Rotary connecting device ontology（1）Inner wall, the axis
It holds（11）It is fixedly mounted on device body（1）In the bearing block of inner wall, the threaded rod（9）It is threadedly coupled slide plate（10）, described
Slide plate（10）Be slidably connected sliding slot（33）, the sliding slot（33）It is symmetrical arranged, the sliding slot（33）It is fixedly mounted on fixed plate
（12）On, the symmetrically arranged sliding slot（33）Between be equipped with straight slot, the slide plate（10）In straight slot, described straight slot or so
Limited block is fixedly mounted in end face（34）, the limited block（34）For pressure inductor, the pressure inductor connects control panel
（26）, the slide plate（10）Hydraulic cylinder is fixedly mounted in lower face（14）, the hydraulic cylinder（14）Connect control panel（26）, described
Hydraulic cylinder（14）Output end be fixedly connected with hydraulic column（15）, the hydraulic column（15）Lower face be fixedly connected with polishing motor
（16）, the polishing motor（16）Connect control panel（26）, the polishing motor（16）Output end be fixedly connected with shaft
（17）, the shaft（17）Lower face be fixedly connected with polishing pad（18）, described device ontology（1）Interior bottom is equipped with port
（51）, described device ontology（1）Vibration-damped table is fixedly mounted in bottom（19）, the vibration-damped table（19）Sliding slot one is fixedly mounted in upper surface
（21）, the sliding slot one（21）Upside is equipped with fixed station（20）, the fixed station（20）Be slidably connected sliding slot one（21）, described solid
Determine platform（20）Convex block is fixedly mounted in lower face（22）, the convex block（22）Upper threaded connection tight fixed bolt（36）, the fixed station
（20）Sliding slot three is fixedly mounted in upper surface（35）, the sliding slot three（35）Pass through sliding block one（23）Be slidably connected grip block（24）,
The sliding block one（23）It is equipped with tight fixed bolt（36）, the grip block（24）It is symmetrical arranged, the grip block（24）Inside is right
Clamping tooth is uniformly fixedly mounted in vertical plate face（37）.
2. a kind of convenient environment friendly stone material grinding device according to claim 1, which is characterized in that the support column（3）On
Equipped with universal wheel（4）Brake apparatus.
3. a kind of convenient environment friendly stone material grinding device according to claim 1, which is characterized in that the dust collecting box
（7）Bottom is equipped with collecting tank（5）, the dust collecting box（7）Right side is equipped with pull handle（6）.
4. a kind of convenient environment friendly stone material grinding device according to claim 1, which is characterized in that the slide plate（10）With spiral shell
Rasp bar（9）Internal thread is equipped in the through-hole of connection.
5. a kind of convenient environment friendly stone material grinding device according to claim 1, which is characterized in that the port（51）Perforation
Device body（1）Bottom and connect base（2）Interior collecting tank（5）.
6. a kind of convenient environment friendly stone material grinding device according to claim 1, which is characterized in that the vibration-damped table（19）Packet
Include sliding panel（38）, fixed frame（39）, vibration damping sheet（40）, telescopic rod（41）And damping spring（42）, the sliding panel（38）End
Face is slidably connected fixed frame（39）, the vibration damping sheet（40）It is fixedly connected with sliding panel（38）And fixed frame（39）, the telescopic rod
（41）It is fixedly connected with vibration damping sheet（40）, the telescopic rod（41）Outer socket damping spring（42）, the damping spring（42）Both ends
Face is fixedly connected with vibration damping sheet（40）.
7. a kind of convenient environment friendly stone material grinding device according to claim 1, which is characterized in that the sliding block one（23）'s
Length is more than grip block（24）Width.
8. a kind of convenient environment friendly stone material grinding device according to claim 1, which is characterized in that the clamping tooth（37）For
Rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820398354.XU CN207942263U (en) | 2018-03-23 | 2018-03-23 | A kind of convenient environment friendly stone material grinding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820398354.XU CN207942263U (en) | 2018-03-23 | 2018-03-23 | A kind of convenient environment friendly stone material grinding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207942263U true CN207942263U (en) | 2018-10-09 |
Family
ID=63697228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820398354.XU Expired - Fee Related CN207942263U (en) | 2018-03-23 | 2018-03-23 | A kind of convenient environment friendly stone material grinding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207942263U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026846A (en) * | 2019-04-12 | 2019-07-19 | 衢州学院 | A kind of processing unit (plant) for ox horn comb |
-
2018
- 2018-03-23 CN CN201820398354.XU patent/CN207942263U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026846A (en) * | 2019-04-12 | 2019-07-19 | 衢州学院 | A kind of processing unit (plant) for ox horn comb |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190619 Address after: 474550 Manziying Formation, Sanwan Village, Sanping Town, Xixia County, Nanyang City, Henan Province Patentee after: Xixia Santai Mining Co., Ltd. Address before: 611630 1, 1, 1, Pu Yan Street, Heshan Town, Pujiang, Chengdu, Sichuan. Patentee before: CHENGDU PUJIANG KEXIAN TECHNOLOGY CO., LTD. |
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| 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: 20181009 Termination date: 20210323 |