CN215335143U - Silencing device, pump assembly and water purifier - Google Patents

Silencing device, pump assembly and water purifier Download PDF

Info

Publication number
CN215335143U
CN215335143U CN202121168733.8U CN202121168733U CN215335143U CN 215335143 U CN215335143 U CN 215335143U CN 202121168733 U CN202121168733 U CN 202121168733U CN 215335143 U CN215335143 U CN 215335143U
Authority
CN
China
Prior art keywords
sleeve
boss
hole
pipe assembly
shell
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
Application number
CN202121168733.8U
Other languages
Chinese (zh)
Inventor
罗庭剑
史鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Shuihudun Health Technology Co Ltd
Original Assignee
Guangdong Shuihudun Health Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong Shuihudun Health Technology Co Ltd filed Critical Guangdong Shuihudun Health Technology Co Ltd
Priority to CN202121168733.8U priority Critical patent/CN215335143U/en
Application granted granted Critical
Publication of CN215335143U publication Critical patent/CN215335143U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Pipe Accessories (AREA)

Abstract

The utility model relates to a silencing device, a pump assembly with the silencing device and a water purifier with the silencing device. The muting device of the present invention comprises: a pipe assembly having a first space, a second space, a first through hole, and a second through hole, the first space and the second space being independent from each other, the first through hole communicating with the first space, the second through hole communicating with the second space; the elastic sleeve is sleeved outside the pipe assembly, the inner wall of the elastic sleeve and the outer wall of the pipe assembly form a closed accommodating cavity, the elastic sleeve wraps the first through hole and the second through hole, and the first through hole and the second through hole are communicated with the accommodating cavity. The silencing device can eliminate or weaken the fluctuation of fluid in a pipeline, particularly the pulse fluctuation of the fluid, and can also play the roles of protecting the pipeline and reducing noise when a control valve of the fluid is suddenly opened and closed.

Description

Silencing device, pump assembly and water purifier
Technical Field
The utility model relates to the technical field of water treatment equipment, in particular to a silencing device, a pump assembly with the silencing device and a water purifier with the pump assembly.
Background
At present, common water treatment equipment adopts a booster pump to boost water, and pure water is prepared through a reverse osmosis membrane; with the continuous development of the water purification market, the application of the large-flux water treatment equipment is more and more extensive, and the vibration and the noise caused by the vibration caused by the feed of the booster pump and the increase of the passing water amount are the main problems of the existing large-flux water treatment equipment.
Vibration and noise are often generated in high-pressure fluid pipelines, which brings environmental noise pollution and pipeline safety hidden dangers, and the harmfulness is particularly serious under the condition that a fluid valve is suddenly opened and closed or the condition that fluid flows in a pulse mode.
SUMMERY OF THE UTILITY MODEL
Based on this, the object of the present invention is to provide a silencing device, a pump assembly with the silencing device, and a water purifier with the pump assembly, wherein the silencing device can eliminate or weaken the fluctuation of fluid in the pipeline, especially the pulse fluctuation of fluid, and can also play the roles of protecting the pipeline and reducing noise when the control valve of the fluid is suddenly opened and closed.
A silencing apparatus, comprising: a pipe assembly having a first space, a second space, a first through hole, and a second through hole, the first space and the second space being independent from each other, the first through hole communicating with the first space, the second through hole communicating with the second space; the elastic sleeve is sleeved outside the pipe assembly, the inner wall of the elastic sleeve and the outer wall of the pipe assembly form a closed accommodating cavity, the elastic sleeve wraps the first through hole and the second through hole, and the first through hole and the second through hole are communicated with the accommodating cavity.
Compared with the prior art, the silencing device provided by the utility model has the advantages that the first through hole and the second through hole are adopted to silence the fluid, and the elastic sleeve is adopted to absorb the excitation energy of the fluid, so that the fluctuation of the fluid in a pipeline, especially the pulse fluctuation of the fluid, can be eliminated or weakened, and in addition, the effects of protecting the pipeline and reducing the noise can be realized when the control valve of the fluid is suddenly opened or closed. Specifically, the fluid enters the first space, then is silenced through the first through hole and enters the accommodating cavity, the excitation energy of the fluid is absorbed by the elastic sleeve, then the fluid is silenced through the second through hole and enters the second space, and finally the fluid flows out of the second space to the outside.
Further, the periphery wall of pipe subassembly is provided with first boss, second boss, the inner wall of elastic sleeve the outer wall of pipe subassembly first boss the second boss constitutes hold the chamber.
Further, the elastic sleeve comprises a sleeve body, and a first flange and a second flange which are arranged at two ends of the sleeve body respectively, the first flange is arranged from the sleeve body to the pipe assembly to extend, the second flange is arranged from the sleeve body to the pipe assembly to extend, the first flange is abutted against the first boss, the second flange is abutted against the second boss, the first boss and the second boss are arranged between the first flange and the second flange, and the outer wall of the pipe assembly is provided with the first boss and the second boss and the sleeve body is provided with the first flange and the second flange to form the accommodating cavity.
Further, the first rib extends from the sleeve body to the tube assembly and abuts against the peripheral wall of the tube assembly, and the second rib extends from the sleeve body to the tube assembly and abuts against the peripheral wall of the tube assembly.
Furthermore, the surface of the first boss, which is far away from the pipe assembly, abuts against the inner wall of the sleeve body, and the surface of the second boss, which is far away from the pipe assembly, abuts against the inner wall of the sleeve body.
Furthermore, the silencing device further comprises a first shell and a second shell, wherein the first shell and the second shell form a shell cavity, one end of the shell cavity abuts against one end of the elastic sleeve, and the other end of the shell cavity abuts against the other end of the elastic sleeve.
Furthermore, the first flange is clamped between the end part of the shell cavity and the first boss, and the second flange is clamped between the end part of the shell cavity and the second boss.
Further, the pipe assembly comprises a hollow center pipe, a first opening and a second opening are respectively formed in two ends of the center pipe, a partition is arranged in an inner cavity of the center pipe, the partition divides the inner cavity of the center pipe into a first space and a second space, a first through hole and a second through hole are formed in the peripheral side wall of the center pipe, the first through hole is located on one side of the partition, and the second through hole is located on the other side of the partition.
Further, the divider is located in the middle of the containing cavity, and the divider is located in the middle of the inner cavity of the central tube.
Furthermore, the silencing device also comprises an elastic buffer sleeve, and the buffer sleeve is sleeved outside the elastic sleeve.
Furthermore, a plurality of convex parts are arranged on the peripheral wall of the buffer sleeve.
Furthermore, a plurality of concave parts are further arranged on the peripheral wall of the buffer sleeve, the convex parts and the concave parts are distributed on the peripheral wall of the buffer sleeve in a staggered mode, the convex parts extend from one end of the buffer sleeve to the other end of the buffer sleeve, and the concave parts extend from one end of the buffer sleeve to the other end of the buffer sleeve.
Furthermore, the silencing device further comprises a first shell and a second shell, wherein the first shell and the second shell form a shell cavity, one end of the shell cavity abuts against one end of the elastic sleeve, the other end of the shell cavity abuts against the other end of the elastic sleeve, the buffer sleeve is sleeved outside the elastic sleeve, and the buffer sleeve is located in the shell cavity.
Furthermore, a water inlet is formed in the first shell, a water outlet is formed in the second shell, the water inlet is communicated with one end of the pipe assembly, and the water outlet is communicated with the other end of the pipe assembly; the number of the first through holes is the same as that of the second through holes, and the aperture of the first through holes is the same as that of the second through holes; the elastic sleeve is made of elastic materials; the buffer sleeve is made of elastic materials.
A pump assembly comprising the silencing device described above.
A water purifier comprises the silencing device.
For a better understanding and practice, the utility model is described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is an exploded view of a silencing apparatus according to an embodiment;
fig. 2 is an assembled schematic view of a silencing apparatus according to an embodiment;
fig. 3 is an internal schematic view of a silencing apparatus according to an embodiment;
reference numerals:
1. a tube assembly; 11. a first space; 12. a second space; 13. a first through hole; 14. a second through hole; 15. a first boss; 16. a second boss; 17. a central tube; 18. a separator; 2. an elastic sleeve; 21. an accommodating chamber; 22. a sleeve body; 23. a first flange; 24. a second flange; 3. a first housing; 31. a water inlet; 4. a second housing; 41. a housing cavity; 42. a water outlet; 5. a buffer sleeve; 51. a convex portion; 52. a recess.
Detailed Description
A silencing device, see fig. 1 to 3, comprises a pipe assembly 1 and an elastic sleeve 2. Wherein the pipe assembly 1 has a first space 11, a second space 12, a first through hole 13, a second through hole 14, the first space 11 and the second space 12 are independent from each other, the first through hole 13 communicates with the first space 11, and the second through hole 14 communicates with the second space 12. The elastic sleeve 2 is sleeved on the outer side of the pipe assembly 1, the inner wall of the elastic sleeve 2 and the outer wall of the pipe assembly 1 form a closed accommodating cavity 21, the elastic sleeve 2 wraps the first through hole 13 and the second through hole 14, and the first through hole 13 and the second through hole 14 are communicated with the accommodating cavity 21. In addition, the elastic sleeve 2 is made of elastic materials, so that the elastic sleeve 2 has good deformation, and the elastic materials can be made of silica gel, rubber and other materials.
The fluid movement process of the silencing device is as follows: the fluid enters the first space 11, then is silenced through the first through hole 13 and enters the accommodating cavity 21, the excitation energy of the fluid is absorbed by the elastic sleeve 2, then the fluid is silenced through the second through hole 14 and enters the second space 12, and finally the fluid flows out of the second space 12 to the outside.
Specifically, referring to fig. 1 to 3, a first boss 15 and a second boss 16 are provided on the outer peripheral wall of the pipe assembly 1, and the inner wall of the elastic sleeve 2, the outer wall of the pipe assembly 1, the first boss 15, and the second boss 16 constitute the above-mentioned accommodating chamber 21. By adopting the scheme, both ends of the elastic sleeve 2 are respectively connected to the first boss 15 and the second boss 16, the elastic sleeve 2 is positioned between the first boss 15 and the second boss 16, the head parts of the first boss 15 and the second boss 16 are exposed, or both ends of the elastic sleeve 2 are wrapped by the first boss 15 and the second boss 16, and the head parts of the first boss 15 and the second boss 16 are hidden in the elastic sleeve 2.
In the present embodiment, referring to fig. 1 to 3, the elastic sleeve 2 is wrapped around the first boss 15 and the second boss 16, and the first boss 15 and the second boss 16 are hidden inside the elastic sleeve 2. Specifically, the elastic sleeve 2 includes a sleeve body 22, and a first flange 23 and a second flange 24 respectively disposed at two ends of the sleeve body 22, the first flange 23 extends from the sleeve body 22 to the tube assembly 1, the second flange 24 extends from the sleeve body 22 to the tube assembly 1, the first flange 23 abuts against the first boss 15, the second flange 24 abuts against the second boss 16, the first boss 15 and the second boss 16 are both between the first flange 23 and the second flange 24, and the outer wall of the tube assembly 1, the first boss 15, the second boss 16, the sleeve body 22, the first flange 23, and the second flange 24 form the accommodating cavity 21.
In the present embodiment, referring to fig. 1 to 3, in order to improve the sealing property of the accommodating chamber 21, a first rib 23 extends from the sheath body 22 to the tube assembly 1 and abuts against the peripheral wall of the tube assembly 1, and a second rib 24 extends from the sheath body 22 to the tube assembly 1 and abuts against the peripheral wall of the tube assembly 1. The surface of the first boss 15 far away from the tube assembly 1 is abutted against the inner wall of the sleeve body 22, and the surface of the second boss 16 far away from the tube assembly 1 is abutted against the inner wall of the sleeve body 22.
Specifically, referring to fig. 1 to 3, the pipe assembly 1 includes a hollow center pipe 17, the two ends of the center pipe 17 are respectively provided with a first opening and a second opening, the inner cavity of the center pipe 17 is provided with a partition 18, the partition 18 divides the inner cavity of the center pipe 17 into the first space 11 and the second space 12, the first through hole 13 and the second through hole 14 are provided on the peripheral side wall of the center pipe 17, the first through hole 13 is located on one side of the partition 18, and the second through hole 14 is located on the other side of the partition 18. In addition, the partition 18 is located in the middle of the accommodating chamber 21, and the partition 18 is located in the middle of the inner cavity of the central tube 17, which helps make the amount of water entering the accommodating chamber 21 from the first space 11 the same as the amount of water entering the second space 12 from the accommodating chamber 21, thereby facilitating sound attenuation and noise reduction. In order to further improve the noise reduction effect, the number of the first through holes 13 is the same as that of the second through holes 14, and the diameter of the first through holes 13 is the same as that of the second through holes 14.
Further, referring to fig. 1 to 3, the mute apparatus further includes a first housing 3 and a second housing 4 detachably connected to each other, the first housing 3 and the second housing 4 form a housing cavity 41, one end of the housing cavity 41 abuts against one end of the elastic sleeve 2, and the other end of the housing cavity 41 abuts against the other end of the elastic sleeve 2. In this embodiment, the first housing 3 is in threaded connection with the second housing 4, one end of the housing cavity 41 abuts against the first blocking piece located at the end of the elastic sleeve 2, the other end of the housing cavity 41 abuts against the second blocking piece located at the end of the elastic sleeve 2, the end surface of the housing cavity 41 and the first boss 15 jointly extrude the first blocking piece, and the end surface of the housing cavity 41 and the second boss 16 jointly extrude the second blocking piece, so that the first blocking piece and the second blocking piece deform, and the sealing performance of the muting device is improved.
Specifically, referring to fig. 1 to 3, a water inlet 31 is provided on the first housing 3, a water outlet 42 is provided on the second housing 4, the water inlet 31 is communicated with one end of the pipe assembly 1, and the water outlet 42 is communicated with the other end of the pipe assembly 1. In this embodiment, one end of the central tube 17 is inserted into the first housing 3 and is communicated with the water inlet 31, and the other end of the central tube 17 is inserted into the second housing 4 and is communicated with the water outlet 42.
Further, referring to fig. 1 to 3, the silencing device further includes a buffer sleeve 5, the buffer sleeve 5 is sleeved on the outer side of the elastic sleeve 2, and the buffer sleeve 5 is located in the housing cavity 41. Moreover, the buffer sleeve 5 is made of an elastic material, so that the buffer sleeve 5 has good deformation, and the elastic material can be made of silica gel, rubber and other materials. The buffer sleeve 5 is used for further absorbing the energy of the fluid, and is helpful to further eliminate or weaken the fluctuation of the fluid in the pipeline, and can also play the roles of protecting the pipeline and reducing noise when the control valve of the fluid is suddenly opened and closed.
Specifically, in order to further improve the noise reduction function of the buffer sleeve 5, referring to fig. 1 to 3, a plurality of protrusions 51 are disposed on the outer peripheral wall of the buffer sleeve 5 to form a bump array on the outer peripheral wall of the buffer sleeve 5, so as to effectively improve the deformation capability of the buffer sleeve 5, and further facilitate further improving the noise reduction function of the buffer sleeve 5. In addition, a plurality of convex portions 51 and concave portions 52 may be provided on the outer peripheral wall of the cushion cover 5, the convex portions 51 and the concave portions 52 may be distributed on the outer peripheral wall of the cushion cover 5 in a staggered manner, the convex portions 51 may extend from one end to the other end of the cushion cover 5, and the concave portions 52 may extend from one end to the other end of the cushion cover 5. The convex portions 51 and the concave portions 52 are distributed on the buffer sleeve 5, so that the outer peripheral wall of the buffer sleeve 5 is wavy or zigzag, the deformation capability of the buffer sleeve 5 can be effectively improved, and the noise reduction function of the buffer sleeve 5 can be further improved.
A pump assembly comprises a booster pump and the silencing device. The silencing device is arranged at the outlet of the booster pump. As for the structure of the booster pump and the remaining related components of the pump assembly, reference is made to the prior art and no further description is given here.
A water purifier, which comprises the pump assembly. As for the rest of the related components of the water purifier, reference may be made to the prior art, which is not described herein again.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (16)

1. A muting device, characterized in that the muting device comprises:
a pipe assembly (1), the pipe assembly (1) having a first space (11), a second space (12), a first through hole (13), a second through hole (14), the first space (11) and the second space (12) being independent from each other, the first through hole (13) communicating with the first space (11), the second through hole (14) communicating with the second space (12);
elastic sleeve (2), elastic sleeve (2) cover is established outside pipe assembly (1), the inner wall of elastic sleeve (2) with the outer wall of pipe assembly (1) constitutes confined chamber (21) that holds, elastic sleeve (2) is wrapping up first through-hole (13) second through-hole (14), first through-hole (13) second through-hole (14) all with hold chamber (21) and be linked together.
2. The silencing apparatus according to claim 1, wherein: the periphery wall of pipe assembly (1) is provided with first boss (15), second boss (16), the inner wall of elastic sleeve (2), the outer wall of pipe assembly (1) first boss (15), second boss (16) constitute hold chamber (21).
3. The silencing apparatus according to claim 2, wherein: the elastic sleeve (2) comprises a sleeve body (22), and a first flange (23) and a second flange (24) which are respectively arranged at the two ends of the sleeve body (22), the first rib (23) extends from the sleeve body (22) to the pipe assembly (1), the second rib (24) extends from the sleeve body (22) to the pipe assembly (1), the first flange (23) abuts against the first boss (15), the second flange (24) abuts against the second boss (16), the first boss (15) and the second boss (16) are both arranged between the first rib (23) and the second rib (24), the outer wall of the pipe assembly (1), the first boss (15), the second boss (16), the sleeve body (22), the first flange (23) and the second flange (24) form the accommodating cavity (21).
4. The silencing apparatus according to claim 3, wherein: the first rib (23) extends from the sleeve body (22) to the pipe assembly (1) and abuts against the peripheral wall of the pipe assembly (1), and the second rib (24) extends from the sleeve body (22) to the pipe assembly (1) and abuts against the peripheral wall of the pipe assembly (1).
5. The silencing apparatus according to claim 4, wherein: the surface of the first boss (15) far away from the pipe assembly (1) is abutted against the inner wall of the sleeve body (22), and the surface of the second boss (16) far away from the pipe assembly (1) is abutted against the inner wall of the sleeve body (22).
6. The silencing apparatus according to claim 3, wherein: the silencing device further comprises a first shell (3) and a second shell (4), wherein the first shell (3) and the second shell (4) form a shell cavity (41), one end of the shell cavity (41) abuts against one end of the elastic sleeve (2), and the other end of the shell cavity (41) abuts against the other end of the elastic sleeve (2).
7. The silencing apparatus according to claim 6, wherein: the first rib (23) is located between the end of the shell cavity (41) and the first boss (15), and the second rib (24) is located between the end of the shell cavity (41) and the second boss (16).
8. The silencing apparatus according to claim 1, wherein: the pipe assembly (1) comprises a hollow center pipe (17), wherein a first opening and a second opening are respectively arranged at two ends of the center pipe (17), a partition (18) is arranged in an inner cavity of the center pipe (17), the partition (18) separates the inner cavity of the center pipe (17) into a first space (11) and a second space (12), a first through hole (13) and a second through hole (14) are formed in the peripheral side wall of the center pipe (17), the first through hole (13) is located on one side of the partition (18), and the second through hole (14) is located on the other side of the partition (18).
9. The silencing apparatus according to claim 8, wherein: the separator (18) is positioned in the middle of the containing cavity (21), and the separator (18) is positioned in the middle of the inner cavity of the central tube (17).
10. The silencing apparatus according to claim 1, wherein: the silencing device further comprises an elastic buffer sleeve (5), and the buffer sleeve (5) is sleeved on the outer side of the elastic sleeve (2).
11. The silencing apparatus according to claim 10, wherein: the outer peripheral wall of the buffer sleeve (5) is provided with a plurality of convex parts (51).
12. The silencing apparatus according to claim 11, wherein: the buffer sleeve is characterized in that a plurality of concave parts (52) are further arranged on the peripheral wall of the buffer sleeve (5), the convex parts (51) and the concave parts (52) are distributed on the peripheral wall of the buffer sleeve (5) in a staggered mode, the convex parts (51) extend from one end of the buffer sleeve (5) to the other end, and the concave parts (52) extend from one end of the buffer sleeve (5) to the other end.
13. The silencing apparatus according to claim 10, wherein: the mute device further comprises a first shell (3) and a second shell (4), wherein the first shell (3) and the second shell (4) form a shell cavity (41), one end of the shell cavity (41) abuts against one end of the elastic sleeve (2), the other end of the shell cavity (41) abuts against the other end of the elastic sleeve (2), the buffer sleeve (5) is sleeved on the outer side of the elastic sleeve (2), and the buffer sleeve (5) is located in the shell cavity (41).
14. The silencing apparatus according to claim 13, wherein:
a water inlet (31) is formed in the first shell (3), a water outlet (42) is formed in the second shell (4), the water inlet (31) is communicated with one end of the pipe assembly (1), and the water outlet (42) is communicated with the other end of the pipe assembly (1);
the number of the first through holes (13) is the same as that of the second through holes (14), and the aperture of the first through holes (13) is the same as that of the second through holes (14);
the elastic sleeve (2) is made of elastic material;
the buffer sleeve (5) is made of elastic materials.
15. A pump assembly, characterized by: comprising a silencing apparatus according to any one of claims 1 to 14.
16. A water purifier, which is characterized in that: comprising a silencing apparatus according to any one of claims 1 to 14.
CN202121168733.8U 2021-05-27 2021-05-27 Silencing device, pump assembly and water purifier Active CN215335143U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121168733.8U CN215335143U (en) 2021-05-27 2021-05-27 Silencing device, pump assembly and water purifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121168733.8U CN215335143U (en) 2021-05-27 2021-05-27 Silencing device, pump assembly and water purifier

Publications (1)

Publication Number Publication Date
CN215335143U true CN215335143U (en) 2021-12-28

Family

ID=79548939

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121168733.8U Active CN215335143U (en) 2021-05-27 2021-05-27 Silencing device, pump assembly and water purifier

Country Status (1)

Country Link
CN (1) CN215335143U (en)

Similar Documents

Publication Publication Date Title
US20090101434A1 (en) Integrated modular exhaust system
CN108150388B (en) Cavity muffler and refrigerator
CN207438017U (en) A kind of gasbag-type seawaterline silencer
CN215335143U (en) Silencing device, pump assembly and water purifier
CN210106139U (en) A silence structure and reverse osmosis water purification machine for booster pump
CN108253716B (en) Sealing member, vacuum assembly and refrigerator
CN210171234U (en) Water purifying equipment
CN114110291B (en) Elastic plate type straight-through perforated pipe water muffler with static pressure balance cavity and assembly method
WO2018088231A1 (en) Muffler
JP2008169780A (en) Muffler
CN214693351U (en) Water purifier with function of making an uproar is fallen
CN213711144U (en) Three-way catalytic aftertreatment silencing device
CN212985509U (en) Booster pump device
CN209557271U (en) Water purifier and pump assembly thereof
CN209557208U (en) Modularization booster pump
CN210564711U (en) Diesel internal combustion engine noise reduction device
CN215805107U (en) Booster pump with silencing device
JPH04312288A (en) Pulsation attenuating device for fluid pressure
CN215807053U (en) Waterway board with silencer
CN114635846B (en) Booster pump assembly for water purifier
CN215521234U (en) Vibration-damping noise-reducing booster pump and water purifier using same
CN212508783U (en) Water pump overlay type noise reduction shell for water purifier
CN112081694A (en) Composite silencer of air inlet system
JPH04366090A (en) Surging controller
KR102459313B1 (en) Water hammer absorber for firefighting with improved durability

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant