CN210318905U - Anti-loose hydraulic pipe joint - Google Patents
Anti-loose hydraulic pipe joint Download PDFInfo
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- CN210318905U CN210318905U CN201920943212.1U CN201920943212U CN210318905U CN 210318905 U CN210318905 U CN 210318905U CN 201920943212 U CN201920943212 U CN 201920943212U CN 210318905 U CN210318905 U CN 210318905U
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- pipe joint
- rubber ring
- elastic rubber
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- axially
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Abstract
The utility model provides a locking hydraulic pressure coupling belongs to hydraulic pressure accessory technical field. It has solved the easy spiral of current hydraulic pressure coupling and has become flexible, and locking effect is not fine problem. In the anti-loosening hydraulic pipe joint, a pipe joint I is axially inserted and connected on an upper insertion position, a pipe joint II is axially inserted and connected on a lower insertion position, an upper connecting sleeve capable of axially fixing the pipe joint I and the pipe joint II is arranged between the pipe joint I and the pipe joint III, a lower connecting sleeve capable of axially fixing the pipe joint II and the pipe joint III is arranged between the pipe joint II and the pipe joint III, and a connecting structure capable of preventing the pipe joint II and the pipe joint III from axially moving outwards is further arranged between the upper connecting sleeve and the. The utility model discloses simple structure, have dual locking fixed connection, relax effectual, when guaranteeing again that locking effect is good, can also ensure sealing performance, the leakproofness is good, long service life.
Description
Technical Field
The utility model belongs to the technical field of the hydraulic pressure accessory, a locking hydraulic pressure coupling is related to.
Background
Various pipe joints are often used in hydraulic pipe systems, mainly: welding, clamping sleeve type and flaring type; these three types of pipe joints have a loose condition after being connected to the hydraulic system.
In view of the above situation, people have designed various anti-loosening hydraulic joints, and some have also applied for patents, for example, chinese patent nos.: the anti-loose hydraulic joint of '201120297068.2', which comprises a concave joint body, one end of which has a smaller diameter than the other end, and the other end with the larger diameter has a concave surface; the convex joint body is provided with a convex surface, and the convex surface is matched with the concave surface to form a sealing spherical surface; a pair of flanges respectively provided on the other end of the concave joint body having a large diameter and the one end of the convex joint body having a large diameter; and a connecting member for joining the pair of flanges together.
In the structure, when the concave joint body and the convex joint body are used for a long time, a little vibration exists between the concave joint body and the convex joint body, so that the flange connecting piece is loosened, the concave joint body and the convex joint body are axially and fixedly connected through only one pair of flanges, so that the axial loosening effect of the concave joint body and the convex joint body is not good, and the service life is short; the concave joint body and the convex joint body are matched with each other through the convex surface and the concave surface to form a sealing spherical surface, the convex surface and the concave surface are abraded due to vibration of the concave joint body and the convex joint body, the sealing effect is poor, and the service life is short.
Disclosure of Invention
The utility model aims at the above-mentioned problem that exists among the prior art, provide a simple structure, dual connection, loosen effectual, long service life's locking hydraulic pressure coupling.
The purpose of the utility model can be realized by the following technical proposal: the utility model provides a locking hydraulic pressure coupling, includes coupling one, coupling two and coupling three, coupling three in have axial interval distribution the position of pegging graft, down peg graft the position, coupling one axial peg graft in last peg graft position on, coupling two axial pegs graft and be in down peg graft on the position, its characterized in that, coupling one and coupling three between be provided with and enable both axial fixity's last adapter sleeve, coupling two and coupling three between be provided with and enable both axial fixity's lower adapter sleeve, last adapter sleeve and lower adapter sleeve between still be provided with the connection structure that can prevent both axial excursions.
The anti-loosening hydraulic pipe joint has the advantages that the upper connecting sleeve and the lower connecting sleeve are arranged, so that the first pipe joint and the second pipe joint are axially and fixedly connected at two ends of the third pipe joint in a one-time connection mode; then the upper connecting sleeve and the lower connecting sleeve form axial fixed connection through the connecting structure, and the fixed connection mode is double connection; good relaxing effect and long service life.
In the anti-loosening hydraulic pipe joint, the first pipe joint is internally provided with the first liquid channel, the second pipe joint is internally provided with the second liquid channel, the third pipe joint is internally provided with the third liquid channel, when the first pipe joint is axially inserted and connected on the upper insertion position and the second pipe joint is axially inserted and connected on the lower insertion position, the first liquid channel, the second liquid channel and the third liquid channel are linearly communicated. The inner walls of the first liquid channel, the second hydraulic channel and the third hydraulic channel are axially flush, so that the through-flow effect of the first pipe joint, the second pipe joint and the third pipe joint is better.
In foretell locking hydraulic pressure coupling, the outer wall of coupling one on the cover be equipped with elasticity rubber circle one, elasticity rubber circle two, elasticity rubber circle one and elasticity rubber circle two axial support to lean on, peg graft when the position on last grafting when coupling one axial, and this elasticity rubber circle two and coupling three up end axial support to lean on, last port department of adapter sleeve have throat portion one, the inner wall of last adapter sleeve on have the internal thread, the upper end of coupling three outer wall have external screw thread section one, last adapter sleeve pass through internal thread screwed connection and be in coupling three external screw thread section one on time, and this throat portion one axial compress tightly elasticity rubber circle on. The first elastic rubber ring and the second elastic rubber ring are elastically deformed by the matching of the axial distance between the first necking part and the third pipe joint on the outer wall of the first pipe joint, when the axial distance between the first necking part and the third pipe joint on the outer wall of the first pipe joint is smaller, the elastic deformation of the first elastic rubber ring and the second elastic rubber ring is larger, when the elastic deformation of the first elastic rubber ring and the second elastic rubber ring is larger, the friction force action of the first elastic rubber ring and the second elastic rubber ring causes the stability of the first pipe joint on the upper plugging position of the third pipe joint to be higher, and when the elastic deformation of the first elastic rubber ring and the second elastic rubber ring is larger, the elastic force action of the first elastic rubber ring and the second elastic rubber ring causes the sealing performance of the first pipe joint on the upper plugging position of the third pipe joint to be better.
In the anti-loose hydraulic pipe joint, the upper end face of the elastic rubber ring I is a conical surface I, the inner wall of the throat part I is a conical surface II which is obliquely matched with the upper end face of the elastic rubber ring I, when the throat part I is axially compressed on the elastic rubber ring I, the inner wall of the throat part I and the upper end face of the elastic rubber ring I are obliquely abutted and matched, the lower end face of the elastic rubber ring II is a conical surface III, the upper end face of the pipe joint III is a conical surface IV which is obliquely matched with the lower end face of the elastic rubber ring II, and when the elastic rubber ring II and the pipe joint III are axially compressed, the upper end face of the pipe joint III and the lower end face of the elastic rubber ring II are obliquely abutted and matched. The purpose that sets up like this makes the throat portion one and elasticity rubber circle two contact surface when leaning on great, and sealed elastic action effect is better, and the contact surface is great when making pipe joint three and elasticity rubber circle two support and lean on, and sealed elastic action effect is better.
In foretell locking hydraulic pressure coupling, the outer wall of coupling two on the cover be equipped with elasticity rubber circle three, elasticity rubber circle four, elasticity rubber circle three and elasticity rubber circle quadriaxial support lean on, when coupling two axial grafting is on grafting position down, and this elasticity rubber circle three and coupling three lower terminal surface axial support lean on, the lower port department of lower adapter sleeve have throat portion two, the inner wall of lower adapter sleeve on have the internal thread, the lower tip of the outer wall of coupling three external screw thread section two has, lower adapter sleeve pass through internal thread screw connection and be in coupling three external screw thread section two during on, and this throat portion two axial compress tightly elasticity rubber circle four on. The cooperation of the axial distance between the second necking part and the third pipe joint on the outer wall of the second pipe joint causes the elastic deformation of the third elastic rubber ring and the fourth elastic rubber ring, when the axial distance between the second necking part and the third pipe joint on the outer wall of the second pipe joint is smaller, the third elastic rubber ring and the fourth elastic rubber ring are larger, when the elastic deformation of the third elastic rubber ring and the fourth elastic rubber ring is larger, the friction force action of the third elastic rubber ring and the fourth elastic rubber ring causes the stability of the second pipe joint on the lower plugging position of the third pipe joint to be higher, and when the elastic deformation of the third elastic rubber ring and the fourth elastic rubber ring is larger, the elastic force action of the third elastic rubber ring and the fourth elastic rubber ring causes the second pipe joint to have better sealing performance on the lower plugging position of the third pipe joint.
In the anti-loose hydraulic pipe joint, the lower end face of the elastic rubber ring IV is a conical surface V, the inner wall of the second necking part is a conical surface VI which is obliquely matched with the lower end face of the elastic rubber ring IV, when the second necking part is axially compressed on the elastic rubber ring IV, the inner wall of the second necking part and the lower end face of the elastic rubber ring IV are obliquely abutted and matched, the upper end face of the elastic rubber ring III is a conical surface VII, the lower end face of the third pipe joint is an conical surface VIII which is obliquely matched with the upper end face of the elastic rubber ring III, and when the elastic rubber ring III is axially compressed with the pipe joint III, the lower end face of the third pipe joint and the upper end face of the elastic rubber ring III are obliquely abutted and matched. The purpose that sets up like this makes the second of throat portion and four two contact surfaces when the elastic rubber circle support to lean on great, and sealed elastic action effect is better, and the contact surface is great when making the third of coupling and three two of elastic rubber circle support to lean on, and sealed elastic action effect is better.
In the anti-loose hydraulic pipe joint, the connecting structure comprises an annular turning edge I arranged on the outer wall of the upper connecting sleeve, an annular turning edge II arranged on the outer wall of the lower connecting sleeve, through holes I are distributed on the annular turning edge I at intervals in the circumferential direction, through holes II are distributed on the annular turning edge II at intervals in the circumferential direction, each through hole I corresponds to each through hole II in the axial direction one by one, and the annular turning edge I and the annular turning edge II are fixedly connected in the axial direction through the through holes I and the through holes II through fasteners. The purpose of this arrangement is to facilitate the loading and unloading of the annular turned edge I and the annular turned edge II through the fastening piece, and the fastening piece is preferably a bolt and a nut.
In the anti-loose hydraulic pipe joint, a compression spring is further sleeved on the fastener between the first annular turned edge and the second annular turned edge, one end of the compression spring is elastically abutted against the first annular turned edge, and the other end of the compression spring is elastically abutted against the second annular turned edge. The purpose of the arrangement is that the first annular turning edge and the second annular turning edge are connected with the fastening piece, and reaction force is generated between the first annular turning edge and the second annular turning edge, so that the first pipe joint, the second pipe joint and the third pipe joint can be better in sealing fit.
Compared with the prior art, this locking hydraulic pressure coupling's advantage does: simple structure, have dual locking fixed connection, relax effectual, when guaranteeing again that locking is effectual, can also ensure sealing performance, the leakproofness is good, long service life.
Drawings
Fig. 1 is a schematic sectional structural view of the anti-loosening hydraulic pipe joint.
In the figure, 1, a pipe joint I; 2. a pipe joint II; 3. a pipe joint III; 4. connecting sleeves are arranged; 5. a lower connecting sleeve; 6. an elastic rubber ring I; 7. an elastic rubber ring II; 8. a first necking part; 9. an elastic rubber ring III; 10. an elastic rubber ring IV; 11. a second necking part; 12. annularly turning over the edge I; 13. annularly turning over the edge II; 14. a fastener; 15. compressing the spring.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1, the anti-loose hydraulic pipe joint mainly comprises a pipe joint I1, a pipe joint II 2 and a pipe joint III 3, wherein the pipe joint III 3 is internally provided with an upper insertion position and a lower insertion position which are axially distributed at intervals, the pipe joint I1 is axially inserted in the upper insertion position, and the pipe joint II 2 is axially inserted in the lower insertion position; the pipe joint is characterized in that a first liquid channel is arranged in the first pipe joint 1, a second hydraulic channel is arranged in the second pipe joint 2, a third hydraulic channel is arranged in the third pipe joint 3, when the first pipe joint 1 is axially inserted into the upper insertion position and the second pipe joint 2 is axially inserted into the lower insertion position, the first liquid channel, the second hydraulic channel and the third hydraulic channel are linearly communicated
An upper connecting sleeve 4 capable of axially fixing the first pipe joint 1 and the third pipe joint 3 is arranged between the first pipe joint 1 and the third pipe joint 3, and the specific connecting mode of the upper connecting sleeve 4, the first pipe joint 1 and the third pipe joint 3 is as follows: the outer wall of the pipe joint I1 is sleeved with an elastic rubber ring I6 and an elastic rubber ring II 7, the elastic rubber ring I6 and the elastic rubber ring II 7 are axially abutted, when the pipe joint I1 is axially inserted in an upper insertion position, the elastic rubber ring II 7 and the upper end face of the pipe joint III 3 are axially abutted, a first necking part 8 is arranged at the upper end opening of the upper connecting sleeve 4, internal threads are arranged on the inner wall of the upper connecting sleeve 4, a first external thread section is arranged at the upper end part of the outer wall of the pipe joint III 3, the upper connecting sleeve 4 is spirally connected to the first external thread section of the pipe joint III 3 through the internal threads, and the first necking part 8 is axially pressed on the elastic rubber ring I6; in practical application, the upper end face of the elastic rubber ring I6 is a conical face I, the inner wall of the throat part I8 is a conical face II which is obliquely matched with the upper end face of the elastic rubber ring I6, when the throat part I8 is axially compressed on the elastic rubber ring I6, the inner wall of the throat part I8 and the upper end face of the elastic rubber ring I6 are obliquely abutted and matched, the lower end face of the elastic rubber ring II 7 is a conical face III, the upper end face of the pipe joint III 3 is a conical face IV which is obliquely matched with the lower end face of the elastic rubber ring II 7, and when the elastic rubber ring II 7 and the pipe joint III 3 are axially compressed, the upper end face of the pipe joint III 3 and the lower end face of the elastic rubber ring II 7 are obliquely abutted and matched.
A lower connecting sleeve 5 which can axially fix the pipe joint II 2 and the pipe joint III 3 is arranged between the pipe joint II 2 and the pipe joint III 3, and the specific connecting mode of the lower connecting sleeve 5, the pipe joint II 2 and the pipe joint III 3 is as follows: the outer wall of the pipe joint II 2 is sleeved with an elastic rubber ring III 9 and an elastic rubber ring IV 10, the elastic rubber ring III 9 and the elastic rubber ring IV 10 are axially abutted, when the pipe joint II 2 is axially inserted in the lower insertion position, the lower end face of the elastic rubber ring III 9 and the lower end face of the pipe joint III 3 are axially abutted, the lower port of the lower connecting sleeve 5 is provided with a necking part II 11, the inner wall of the lower connecting sleeve 5 is provided with an internal thread, the lower end part of the outer wall of the pipe joint III 3 is provided with an external thread section II, when the lower connecting sleeve 5 is spirally connected to the external thread section II of the pipe joint III 3 through the internal thread, and the necking part II 11 is axially pressed on the elastic rubber ring IV 10; in practical application, the lower end face of the elastic rubber ring four 10 is a conical surface five, the inner wall of the throat part two 11 is a conical surface six which is obliquely matched with the lower end face of the elastic rubber ring four 10, when the throat part two 11 is axially compressed on the elastic rubber ring four 10, the inner wall of the throat part two 11 and the lower end face of the elastic rubber ring four 10 are obliquely abutted and matched, the upper end face of the elastic rubber ring three 9 is a conical surface seven, the lower end face of the pipe joint three 3 is an conical surface eight which is obliquely matched with the upper end face of the elastic rubber ring three 9, and when the elastic rubber ring three 9 is axially compressed with the pipe joint three 3, the lower end face of the pipe joint three 3 and the upper end face of the elastic rubber ring three 9 are obliquely abutted and matched.
A connecting structure capable of preventing the upper connecting sleeve 4 and the lower connecting sleeve 5 from moving outwards in the axial direction is arranged between the upper connecting sleeve and the lower connecting sleeve; in actual manufacturing, the specific implementation of the connecting structure is as follows: the outer wall of the upper connecting sleeve 4 is provided with an annular turned edge I12, the outer wall of the lower connecting sleeve 5 is provided with an annular turned edge II 13, through holes I are circumferentially distributed on the annular turned edge I12 at intervals, through holes II are circumferentially distributed on the annular turned edge II 13 at intervals, each through hole I is axially corresponding to each through hole II one by one, and the annular turned edge I12 and the annular turned edge II 13 penetrate through the through holes I and the through holes II through fasteners 14 to be axially fixedly connected; and a compression spring 15 is further sleeved on a fastening piece 14 between the first annular turned edge 12 and the second annular turned edge 13, one end of the compression spring 15 elastically abuts against the first annular turned edge 12, and the other end of the compression spring 15 elastically abuts against the second annular turned edge 13.
Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (8)
1. The utility model provides a locking hydraulic pressure coupling, includes coupling one (1), coupling two (2) and coupling three (3), coupling three (3) in have axial interval distribution last grafting position, lower grafting position, coupling one (1) axial peg graft in last grafting position on, coupling two (2) axial peg graft in lower grafting position on, its characterized in that, coupling one (1) and coupling three (3) between be provided with and enable both axial fixity's last adapter sleeve (4), coupling two (2) and coupling three (3) between be provided with and enable both axial fixity's lower adapter sleeve (5), last adapter sleeve (4) and lower adapter sleeve (5) between still be provided with the connection structure that can prevent both axial excursions.
2. The anti-loosening hydraulic pipe joint according to claim 1, wherein a first liquid channel is arranged in the first pipe joint (1), a second hydraulic channel is arranged in the second pipe joint (2), a third hydraulic channel is arranged in the third pipe joint (3), when the first pipe joint (1) is axially inserted in the upper insertion position and the second pipe joint (2) is axially inserted in the lower insertion position, the first liquid channel, the second hydraulic channel and the third hydraulic channel are linearly communicated.
3. The anti-loosening hydraulic pipe joint according to claim 2, wherein an elastic rubber ring I (6) and an elastic rubber ring II (7) are sleeved on the outer wall of the pipe joint I (1), the elastic rubber ring I (6) and the elastic rubber ring II (7) are axially abutted, when the pipe joint I (1) is axially inserted into the upper insertion position, the elastic rubber ring II (7) and the upper end surface of the pipe joint III (3) are axially abutted, a first necking part (8) is arranged at the upper port of the upper connecting sleeve (4), internal threads are arranged on the inner wall of the upper connecting sleeve (4), the upper end part of the outer wall of the pipe joint III (3) is provided with a first external thread section, when the upper connecting sleeve (4) is spirally connected on the first external thread section of the pipe joint III (3) through an internal thread, and the necking part I (8) is axially pressed on the elastic rubber ring I (6).
4. The anti-loose hydraulic pipe joint as claimed in claim 3, characterized in that the upper end surface of the elastic rubber ring I (6) is a conical surface I, the inner wall of the necking part I (8) is a conical surface II which is obliquely matched with the upper end surface of the elastic rubber ring I (6), when the necking part I (8) is axially pressed on the elastic rubber ring I (6), and the inner wall of the necking part I (8) is obliquely abutted and matched with the upper end surface of the elastic rubber ring I (6), the lower end surface of the elastic rubber ring II (7) is a conical surface III, the upper end surface of the pipe joint III (3) is a conical surface IV which is obliquely matched with the lower end surface of the elastic rubber ring II (7), when the second elastic rubber ring (7) and the third pipe joint (3) are axially compressed, the upper end face of the third pipe joint (3) and the lower end face of the second elastic rubber ring (7) are obliquely abutted and matched.
5. The anti-loosening hydraulic pipe joint according to claim 4, wherein an elastic rubber ring III (9) and an elastic rubber ring IV (10) are sleeved on the outer wall of the pipe joint II (2), the third elastic rubber ring (9) and the fourth elastic rubber ring (10) are axially abutted, when the second pipe joint (2) is axially inserted on the lower insertion position, the elastic rubber ring (9) is axially abutted against the lower end surface of the third pipe joint (3), a second necking part (11) is arranged at the lower port of the lower connecting sleeve (5), internal threads are arranged on the inner wall of the lower connecting sleeve (5), the lower end part of the outer wall of the pipe joint III (3) is provided with an external thread section II, when the lower connecting sleeve (5) is spirally connected on the external thread section II of the pipe joint III (3) through an internal thread, and the second necking part (11) is axially pressed on the fourth elastic rubber ring (10).
6. The anti-loose hydraulic pipe joint according to claim 5, characterized in that the lower end surface of the elastic rubber ring four (10) is a conical surface five, the inner wall of the second necking part (11) is a conical surface six which is obliquely matched with the lower end surface of the elastic rubber ring four (10), when the second necking part (11) is axially pressed on the fourth elastic rubber ring (10), and the inner wall of the second necking part (11) is obliquely abutted and matched with the lower end surface of the elastic rubber ring (10), the upper end surface of the elastic rubber ring III (9) is a conical surface seven, the lower end surface of the pipe joint III (3) is a conical surface eight which is obliquely matched with the upper end surface of the elastic rubber ring III (9), when the elastic rubber ring III (9) is axially compressed with the pipe joint III (3), the lower end face of the pipe joint III (3) is obliquely abutted against and matched with the upper end face of the elastic rubber ring III (9).
7. The anti-loosening hydraulic pipe joint according to claim 6, wherein the connecting structure comprises a first annular turning edge (12) arranged on the outer wall of the upper connecting sleeve (4), a second annular turning edge (13) arranged on the outer wall of the lower connecting sleeve (5), first through holes are circumferentially and alternately distributed on the first annular turning edge (12), second through holes are circumferentially and alternately distributed on the second annular turning edge (13), each first through hole corresponds to each second through hole in a one-to-one axial manner, and the first annular turning edge (12) and the second annular turning edge (13) are fixedly connected in the two axial directions through the first through holes and the second through holes through fasteners (14).
8. The anti-loose hydraulic pipe joint according to claim 7, characterized in that a compression spring (15) is further sleeved on a fastening piece (14) between the first annular flange (12) and the second annular flange (13), one end of the compression spring (15) is elastically abutted against the first annular flange (12), and the other end of the compression spring (15) is elastically abutted against the second annular flange (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920943212.1U CN210318905U (en) | 2019-06-21 | 2019-06-21 | Anti-loose hydraulic pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920943212.1U CN210318905U (en) | 2019-06-21 | 2019-06-21 | Anti-loose hydraulic pipe joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210318905U true CN210318905U (en) | 2020-04-14 |
Family
ID=70145604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920943212.1U Expired - Fee Related CN210318905U (en) | 2019-06-21 | 2019-06-21 | Anti-loose hydraulic pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210318905U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855181A (en) * | 2020-07-27 | 2020-10-30 | 西南交通大学 | Testing arrangement of pipe joint tightening torque and angle displacement relation |
| CN113422333A (en) * | 2021-07-08 | 2021-09-21 | 江苏华茂管业有限公司 | MPP pipe with high stable connectivity |
-
2019
- 2019-06-21 CN CN201920943212.1U patent/CN210318905U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855181A (en) * | 2020-07-27 | 2020-10-30 | 西南交通大学 | Testing arrangement of pipe joint tightening torque and angle displacement relation |
| CN111855181B (en) * | 2020-07-27 | 2021-09-14 | 西南交通大学 | Testing arrangement of pipe joint tightening torque and angle displacement relation |
| CN113422333A (en) * | 2021-07-08 | 2021-09-21 | 江苏华茂管业有限公司 | MPP pipe with high stable connectivity |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200414 Termination date: 20210621 |