CN217070081U - Dust exhaust treatment device for construction - Google Patents
Dust exhaust treatment device for construction Download PDFInfo
- Publication number
- CN217070081U CN217070081U CN202123045651.7U CN202123045651U CN217070081U CN 217070081 U CN217070081 U CN 217070081U CN 202123045651 U CN202123045651 U CN 202123045651U CN 217070081 U CN217070081 U CN 217070081U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- suction head
- block
- dust
- treatment device
- 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.)
- Active
Links
Images
Landscapes
- Joints Allowing Movement (AREA)
Abstract
The utility model belongs to the field of building construction, in particular to a dust and waste gas treatment device for building construction, which comprises a casing, a machine body, a pipeline and a suction head; the machine body is arranged in the shell, the top end of the shell is fixedly connected with a pipeline, and one end of the suction head is inserted into the other end of the pipeline; the other end of the pipeline is provided with a dismounting mechanism, the dismounting mechanism comprises insertion blocks, rubber rings, clamping rods and connecting assemblies, the two groups of insertion blocks are fixedly connected to the front end and the rear end of the suction head, one end of each insertion block is inserted into the other end of the pipeline, and the rubber rings are arranged outside the suction head; the problem of the pipeline be not convenient for dismantle the suction head is solved, through detaching mechanism, the operating personnel of being convenient for is dismantled the washing to the suction head after dismantling, prevents that the suction head from long-term the use from taking place easily and blockking up, and influences the holistic normal use of device, washs the back through the suction head, has improved the device and has handled dust exhaust-gas's efficiency.
Description
Technical Field
The utility model relates to a construction field specifically is a dust exhaust treatment device for construction.
Background
With the progress of society, the building industry is also greatly developed, and a large amount of dust is generated in the building construction process, and the dust and waste gas not only pollute the environment, but also have great harm to human bodies.
Therefore, it is necessary to treat it by a dust exhaust gas treatment device. The dust and waste gas treatment device mainly sucks dust and waste gas in the air through the suction head and then treats the dust and waste gas.
In the using process of the existing dust and waste gas treatment device, because the suction head and the pipeline are fixed through the bolt, the suction head is easy to block after long-term use, and is inconvenient to disassemble and clean; therefore, a dust and exhaust gas treatment device for building construction is proposed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In order to compensate prior art's not enough, current dust exhaust treatment device is not convenient for dismantle the clearance to the suction head, prevents inside jam and influences the problem of device normal use, the utility model provides a dust exhaust treatment device for construction.
The utility model provides a technical scheme that its technical problem adopted is: the utility model relates to a dust and waste gas treatment device for building construction, which comprises a casing, a machine body, a pipeline and a suction head; the machine body is arranged in the shell, the top end of the shell is fixedly connected with a pipeline, and one end of the suction head is inserted into the other end of the pipeline;
the other end of the pipeline is provided with a dismounting mechanism, the dismounting mechanism comprises insertion blocks, rubber rings, clamping rods and connecting components, the two groups of insertion blocks are fixedly connected with the front end and the rear end of the suction head, one end of the insertion block is inserted into the other end of the pipeline, a rubber ring is arranged outside the suction head, one side of the rubber ring is attached to the other side of the pipeline, the front end and the rear end of the other end of the pipeline are both provided with movable grooves, a clamping rod is movably arranged in the movable groove through a connecting component, a first spring is sleeved outside one end of the clamping rod, which is far away from the inserting block, one end of the clamping rod, which is far away from the first spring, is inserted into the insertion block, one side of the clamping rod, which is far away from the insertion block, is fixedly connected with the pulling block, so that the problem that the suction head is inconvenient to disassemble by a pipeline is solved, through the disassembly mechanism, the suction head after disassembly is convenient for the operator to disassemble and clean, and the suction head is prevented from being easily blocked after long-term use and affecting the overall normal use of the device.
Preferably, a rubber sleeve is glued on one side of the rubber ring, and a sealing ring matched with the rubber sleeve is glued on the inner wall of the other end of the pipeline, so that the sealing performance between the pipeline and the suction head is further improved.
Preferably, coupling assembling includes slide rail, dead lever and movable block, the slide rail is installed in the activity inslot portion, slide rail middle-end rigid coupling dead lever, and the outside cover of dead lever establish the movable block, movable block one side rigid coupling kelly opposite side plays spacing effect to the kelly, and the kelly of being convenient for removes in the position of injecing.
Preferably, the one end movable mounting that coupling assembling was kept away from to the kelly has the ball, and laminates each other between the surface of ball and the activity inslot wall, has improved smooth and easy nature when the kelly removes, has saved the dynamics that operating personnel pulling pulled the piece.
Preferably, the inside protection machanism that sets up of casing, protection machanism includes fixed block, spout and supporting component, and is two sets of the all rigid couplings of fixed block in the organism left and right sides, both ends are all through pivot movable mounting hinge bar about the fixed block, and are two sets of welding second spring between the hinge bar, the hinge bar other end is through pivot movable mounting slider, and slider movable mounting is inside the spout, welding reset spring between slider one side and the spout inner wall, the upper and lower both ends between casing and the organism all set up supporting component, have solved the problem of casing to the barrier propterty of organism, and through protection machanism, the protection device receives the damage easily when receiving the collision of external object, has improved the adaptability in device place.
Preferably, the supporting component comprises a loop bar, a supporting rod and an expansion spring, the loop bar is fixedly installed at the left end and the right end inside the casing, the supporting rod is movably installed inside the loop bar, one side of the supporting rod is fixedly connected to the other side of the casing, the expansion spring is welded between the supporting rod and the inner wall of the loop bar, the upper end and the lower end between the casing and the casing are conveniently supported, and the stability of the casing and the casing is improved.
The utility model discloses an useful part lies in:
1. the utility model discloses a pulling the piece to the one end of keeping away from the pipeline, until shifting out the inside of inserted block with kelly one end, then take off the suction head and wash, insert the suction head after washing into the inside of the pipeline other end again, until rubber circle one side is laminated in the pipeline opposite side, realized that the suction head obtains the function of dismantling the washing, solved the pipeline and be not convenient for dismantle the problem to the suction head, through dismantling the mechanism, be convenient for operating personnel to dismantle the suction head after dismantling and wash, prevent that the suction head from using for a long time and easily taking place the jam, and influence the whole normal use of device, after washing to the suction head, improved the efficiency of device to dust exhaust-gas treatment;
2. the utility model discloses a spout, the structural design in slider and hinge bar, when the casing receives the collision of external object, under the cooperation of spout and slider, the angle of hinge bar takes place to change, under reset spring's elastic action, the hinge bar returns the normal position, thereby make the casing return the normal position, the problem of casing to the barrier propterty of organism has been solved, through protection machanism, the protection device receives the damage easily when receiving the collision of external object, the adaptability in device place has been improved, the life of device has been improved simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic perspective view of a first embodiment;
FIG. 2 is a schematic top view, partially in section, of a first embodiment;
FIG. 3 is a schematic cross-sectional front view illustrating a structure of the first embodiment;
FIG. 4 is an enlarged structural view of the first embodiment at A in FIG. 2;
FIG. 5 is an enlarged structural diagram of a portion B in FIG. 3 according to the first embodiment;
FIG. 6 is an enlarged structural view of the first embodiment at C in FIG. 3;
fig. 7 is a schematic partial top cross-sectional structure diagram of the second embodiment.
In the figure: 110. a housing; 120. a body; 130. a pipeline; 140. a suction head; 210. inserting a block; 220. a rubber ring; 221. a rubber sleeve; 230. a seal ring; 240. a movable groove; 250. a clamping rod; 251. a ball bearing; 260. a connecting assembly; 270. pulling the block; 280. a first spring; 290. a rubber ball; 310. a fixed block; 320. a hinged lever; 330. a second spring; 340. a chute; 350. a slider; 360. a return spring; 370. a support assembly.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
Referring to fig. 1 to 6, a dust and exhaust gas treatment device for building construction includes a housing 110, a body 120, a pipe 130 and a suction head 140; the machine body 120 is arranged inside the machine shell 110, the top end of the machine shell 110 is fixedly connected with a pipeline 130, and one end of the suction head 140 is inserted into the other end of the pipeline 130;
the other end of the pipeline 130 is provided with a dismounting mechanism, the dismounting mechanism comprises insertion blocks 210, rubber rings 220, clamping rods 250 and a connecting assembly 260, two groups of insertion blocks 210 are fixedly connected to the front end and the rear end of the suction head 140, one end of each insertion block 210 is inserted into the other end of the pipeline 130, the rubber rings 220 are arranged outside the suction head 140, one side of each rubber ring 220 is attached to the other side of the pipeline 130, the front end and the rear end of the other end of the pipeline 130 are provided with movable grooves 240, the clamping rods 250 are movably mounted in the movable grooves 240 through the connecting assembly 260, a first spring 280 is sleeved outside one end, far away from the insertion blocks 210, of each clamping rod 250, one end, far away from the first spring 280, is inserted into the insertion blocks 210, and the clamping rods 250 are far away from one side of the insertion blocks 210 and fixedly connected with the pulling blocks 270; when the suction head 140 needs to be detached and cleaned, the pulling block 270 is pulled towards one end far away from the pipeline 130, the clamping rod 250 is driven to move under the matching action of the balls 251, under the matching action of the connecting assembly 260, one end of the clamping rod 250 is moved out of the inner part of the inserting block 210, because the clamping rod 250 has certain elasticity, the suction head 140 is taken down for cleaning, the cleaned suction head 140 is inserted into the inner part of the other end of the pipeline 130 until one side of the rubber ring 220 is attached to the other side of the pipeline 130, one end of the rubber sleeve 221 is mutually clamped with the inner part of the other end of the sealing ring 230, the tightness between the pipeline 130 and the suction head 140 is improved, the pulling block 270 is loosened, because the first spring 280 is squeezed, the restoring action is achieved, the clamping rod 250 moves towards one end close to the inserting block 210, one end of the clamping rod 250 is inserted into the inner part of the inserting block 210, thereby the suction head 140 is fixed, then the device is used again, the suction head 140 is detached and cleaned, the problem that the pipeline 130 is not convenient for detaching the suction head 140 is solved, through the detaching mechanism, an operator can detach and clean the detached suction head 140 conveniently, the operation time is saved, the suction head 140 is prevented from being blocked easily due to long-term use, the whole normal use of the device is influenced, and the efficiency of the device for treating dust and waste gas is improved after the suction head 140 is cleaned.
A rubber sleeve 221 is glued on one side of the rubber ring 220, and a sealing ring 230 matched with the rubber sleeve 221 is glued on the inner wall of the other end of the pipeline 130; when the device works, through the design of the rubber sleeve 221 and the sealing ring 230, when one side of the rubber ring 220 is attached to the other side of the pipeline 130, one end of the rubber sleeve 221 is clamped with the inner part of the other end of the sealing ring 230, so that the sealing performance between the pipeline 130 and the suction head 140 is further improved, and the phenomenon that the air leakage is generated at the gap between the pipeline 130 and the suction head 140 to influence the dust collection effect when the device is used is prevented.
The connecting assembly 260 comprises a slide rail, a fixed rod and a movable block, the slide rail is arranged in the movable groove 240, the middle end of the slide rail is fixedly connected with the fixed rod, the movable block is sleeved outside the fixed rod, and one side of the movable block is fixedly connected with the other side of the clamping rod 250; during operation, through coupling assembling 260's structural design, the kelly 250 of being convenient for removes under the mating reaction of slide rail, dead lever and movable block, plays spacing effect to kelly 250 simultaneously, and the kelly 250 of being convenient for removes in the position of injecing, has improved the practicality of operation.
A ball 251 is movably mounted at one end of the clamping rod 250 away from the connecting component 260, and the outer surface of the ball 251 is attached to the inner wall of the movable groove 240; during operation, through the design of the balls 251, the clamping rod 250 can move back and forth under the cooperation of the balls 251, the smoothness of the clamping rod 250 during movement is improved, the clamping rod 250 is prevented from being blocked during movement, and the force for pulling the pull block 270 by an operator is saved.
A protection mechanism is arranged in the machine shell 110 and comprises fixed blocks 310, a sliding groove 340 and supporting components 370, two groups of the fixed blocks 310 are fixedly connected to the left side and the right side of the machine body 120, hinge rods 320 are movably arranged at the upper end and the lower end of each fixed block 310 through a rotating shaft, a second spring 330 is welded between the two groups of the hinge rods 320, a sliding block 350 is movably arranged at the other end of each hinge rod 320 through a rotating shaft, the sliding block 350 is movably arranged in the sliding groove 340, a reset spring 360 is welded between one side of the sliding block 350 and the inner wall of the sliding groove 340, and the supporting components 370 are arranged at the upper end and the lower end between the machine shell 110 and the machine body 120; when the protection device works, when the protection performance of the casing 110 on the machine body 120 needs to be improved, firstly, through the structural design of the chute 340, the slider 350 and the hinge rod 320, when the casing 110 is collided by an external object, under the matching of the chute 340 and the slider 350, the angle of the hinge rod 320 is changed, because the reset spring 360 and the second spring 330 are extruded, the reset function is realized, the upper and lower groups of sliders 350 relatively move, the hinge rod 320 returns to the original position, so that the casing 110 returns to the original position, through the design of the support assembly 370, the upper and lower ends of the casing 110 and the machine body 120 are supported, the stability of the machine body 120 is improved, the protection performance of the casing 110 on the machine body 120 is improved, the problem of the protection performance of the casing 110 on the machine body 120 is solved, through the protection mechanism, the device is prevented from being easily damaged when being collided by the external object, and the use effect of the device is influenced, the adaptability of the device field is improved, and the service life of the device is prolonged.
The supporting component 370 comprises a loop bar, a supporting bar and a telescopic spring, the loop bar is fixedly installed at the left end and the right end inside the casing 110, the supporting bar is movably installed inside the loop bar, one side of the supporting bar is fixedly connected to the other side of the machine body 120, and the telescopic spring is welded between the supporting bar and the inner wall of the loop bar; in operation, through the design of the supporting component 370, the upper and lower ends between the casing 110 and the machine body 120 are conveniently supported, the stability of the casing 110 and the machine body 120 is improved, and the device is prevented from being easily toppled by the collision of an external object.
Example two
Referring to fig. 7, in a first comparative example, as another embodiment of the present invention, a rubber ball 290 is glued inside the insertion block 210, and one end of the rubber ball 290 is engaged with the inside of the clamping rod 250; in operation, through the design of the rubber ball 290, when the clamping rod 250 returns to the original position under the elastic action of the first spring 280, the rubber ball 290 plays a role of buffering, and because the rubber ball 290 is designed in an arc shape, when one end of the rubber ball 290 is mutually clamped with the inside of the clamping rod 250, the tightness between the clamping rod 250 and the suction head 140 is improved, thereby improving the stability of the suction head 140.
The working principle is that when the suction head 140 needs to be disassembled for cleaning, the pulling block 270 is pulled towards one end far away from the pipeline 130, the clamping rod 250 is driven to move under the matching action of the ball 251, under the matching action of the connecting component 260, one end of the clamping rod 250 is moved out of the inner part of the inserting block 210, because the clamping rod 250 has certain elasticity, the suction head 140 is taken down for cleaning, the cleaned suction head 140 is inserted into the inner part of the other end of the pipeline 130 until one side of the rubber ring 220 is attached to the other side of the pipeline 130, one end of the rubber sleeve 221 is mutually clamped with the inner part of the other end of the sealing ring 230, the sealing performance between the pipeline 130 and the suction head 140 is improved, the pulling block 270 is loosened, because the first spring 280 is squeezed, the restoring action is achieved, the clamping rod 250 moves towards one end close to the inserting block 210, one end of the clamping rod 250 is inserted into the inner part of the inserting block 210, thereby the suction head 140 is fixed, and then the device is used, thereby realizing the function of disassembling and cleaning the suction head 140;
when the protective performance of the casing 110 on the machine body 120 needs to be improved, firstly, through the structural design of the sliding groove 340, the sliding block 350 and the hinge rod 320, when the casing 110 is collided by an external object, under the matching of the sliding groove 340 and the sliding block 350, the angle of the hinge rod 320 is changed, because the return spring 360 and the second spring 330 are squeezed, the restoring effect is achieved, the upper and lower groups of sliding blocks 350 move relatively, and the hinge rod 320 returns to the original position, so that the casing 110 returns to the original position, through the design of the supporting component 370, the upper and lower ends of the casing 110 and the machine body 120 are supported, the stability of the machine body 120 is improved, and the protective performance of the casing 110 on the machine body 120 is improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.
Claims (6)
1. The utility model provides a dust exhaust treatment device for construction which characterized in that: comprises a shell (110), a machine body (120), a pipeline (130) and a suction head (140); the machine body (120) is arranged inside the machine shell (110), the top end of the machine shell (110) is fixedly connected with a pipeline (130), and one end of the suction head (140) is inserted into the other end of the pipeline (130);
the other end of the pipeline (130) is provided with a dismounting mechanism, the dismounting mechanism comprises insert blocks (210), rubber rings (220), clamping rods (250) and connecting components (260), the two groups of insert blocks (210) are fixedly connected with the front end and the rear end of the suction head (140), one end of the insertion block (210) is inserted into the other end of the pipeline (130), a rubber ring (220) is arranged outside the suction head (140), one side of the rubber ring (220) is attached to the other side of the pipeline (130), the front end and the rear end of the other end of the pipeline (130) are both provided with movable grooves (240), and the inside of the movable groove (240) is movably provided with a clamping rod (250) through a connecting component (260), a first spring (280) is sleeved outside one end of the clamping rod (250) far away from the inserting block (210), one end of the clamping rod (250) far away from the first spring (280) is inserted into the insertion block (210), and one side of the clamping rod (250) far away from the inserting block (210) is fixedly connected with a pulling block (270).
2. The dust and exhaust gas treatment device for building construction according to claim 1, wherein: and a rubber sleeve (221) is glued on one side of the rubber ring (220), and a sealing ring (230) matched with the rubber sleeve (221) is glued on the inner wall of the other end of the pipeline (130).
3. The dust and exhaust gas treatment device for building construction according to claim 2, wherein: coupling assembling (260) include slide rail, dead lever and movable block, the slide rail is installed inside movable groove (240), slide rail middle-end rigid coupling dead lever, and the outside cover of dead lever establish the movable block, movable block one side rigid coupling kelly (250) opposite side.
4. The dust and exhaust gas treatment device for building construction according to claim 3, wherein: one end of the clamping rod (250) far away from the connecting component (260) is movably provided with a ball (251), and the outer surface of the ball (251) is attached to the inner wall of the movable groove (240).
5. The dust and exhaust gas treatment device for building construction according to claim 4, wherein: casing (110) inside protection machanism that sets up, protection machanism includes fixed block (310), spout (340) and supporting component (370), and is two sets of fixed block (310) all rigid couplings in organism (120) left and right sides, both ends are all through pivot movable mounting hinge bar (320), two sets of about fixed block (310) weld second spring (330) between hinge bar (320), the hinge bar (320) other end is through pivot movable mounting slider (350), and slider (350) movable mounting is inside spout (340), weld reset spring (360) between slider (350) one side and spout (340) inner wall, the upper and lower both ends between casing (110) and organism (120) all set up supporting component (370).
6. The dust and exhaust gas treatment device for building construction according to claim 5, characterized in that: the supporting component (370) comprises a loop bar, a supporting rod and a telescopic spring, the loop bar is fixedly installed at the left end and the right end inside the casing (110), the supporting rod is movably installed inside the loop bar, one side of the supporting rod is fixedly connected to the other side of the machine body (120), and the telescopic spring is welded between the supporting rod and the inner wall of the loop bar.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202123045651.7U CN217070081U (en) | 2021-12-06 | 2021-12-06 | Dust exhaust treatment device for construction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202123045651.7U CN217070081U (en) | 2021-12-06 | 2021-12-06 | Dust exhaust treatment device for construction |
Publications (1)
Publication Number | Publication Date |
---|---|
CN217070081U true CN217070081U (en) | 2022-07-29 |
Family
ID=82538437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202123045651.7U Active CN217070081U (en) | 2021-12-06 | 2021-12-06 | Dust exhaust treatment device for construction |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN217070081U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116873572A (en) * | 2023-07-28 | 2023-10-13 | 广东恩美化工科技股份有限公司 | Dust material conveying device based on air compression raw materials |
-
2021
- 2021-12-06 CN CN202123045651.7U patent/CN217070081U/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116873572A (en) * | 2023-07-28 | 2023-10-13 | 广东恩美化工科技股份有限公司 | Dust material conveying device based on air compression raw materials |
CN116873572B (en) * | 2023-07-28 | 2024-05-14 | 广东恩美化工科技股份有限公司 | Dust material conveying device based on air compression raw materials |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN217070081U (en) | Dust exhaust treatment device for construction | |
CN103010168B (en) | Axle housing inner chamber brushing device for axle housing cleaning machine | |
CN205808229U (en) | A kind of mechanical hand cleans device | |
CN202987082U (en) | Axle casing cavity washing device of axle casing washing machine | |
CN210890537U (en) | Quick joint for dust remover blowing pipe | |
CN116748239A (en) | Pipeline cleaning method based on magnetorheological fluid | |
CN116900900A (en) | Pipeline inner wall rust cleaning equipment with clean function | |
CN113064472B (en) | Efficient heat dissipation and dustproof computer case | |
CN115814533A (en) | Carbon-fibre composite processing dust collector | |
CN216086093U (en) | Power bus plug box with strong heat dissipation function | |
CN213161987U (en) | Environment-friendly solid waste treatment device | |
CN211043296U (en) | Wall-mounted indoor air detector | |
CN208066896U (en) | A kind of energy-saving and environment-friendly dedusting collection device | |
CN208780979U (en) | A kind of impact dedusting projection curtain device | |
CN202813511U (en) | Extractor hood with cleaning function | |
CN106798522B (en) | Suction pipe structure in dust collector | |
CN219582587U (en) | Steel member surface foreign matter cleaning equipment | |
CN217439146U (en) | Sewer pipe restores device of decontaminating | |
CN111823245A (en) | High-pressure flushing mechanism of carriage cleaning robot | |
CN114893631B (en) | Detachable and washable waterway conversion interface for water purification system | |
CN108417353A (en) | A kind of miniature transformer heat dissipation structure | |
CN217950619U (en) | Vacuumizing device for pump room of water works | |
CN215763067U (en) | Chain connecting shaft convenient to disassemble and assemble | |
CN217990298U (en) | Novel town gas pipeline inner wall clearance ware | |
CN213645103U (en) | Dustproof cleaning equipment of seat bush processing usefulness |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |