CN213544239U - Clean type computer hydraulic pressure testing machine - Google Patents
Clean type computer hydraulic pressure testing machine Download PDFInfo
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- CN213544239U CN213544239U CN202022146998.XU CN202022146998U CN213544239U CN 213544239 U CN213544239 U CN 213544239U CN 202022146998 U CN202022146998 U CN 202022146998U CN 213544239 U CN213544239 U CN 213544239U
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- hydraulic pressure
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Abstract
The utility model belongs to the technical field of test instrument and specifically relates to a clean type computer hydraulic pressure testing machine is related to, which comprises a frame, the pneumatic cylinder, lower bearing plate, go up the bearing plate, control auxiliary machine and cleaning device, the frame is placed subaerial, the vertical setting in the frame lower part of pneumatic cylinder, the cylinder body and the frame fixed connection of pneumatic cylinder, lower bearing plate level sets up in the pneumatic cylinder top, the piston rod fixed connection of lower bearing plate and pneumatic cylinder, it is located lower bearing plate top to go up the bearing plate, go up bearing plate and frame fixed connection, the control auxiliary machine is installed in frame one side, the control auxiliary machine is used for control and monitoring pressure testing machine behavior, cleaning device is used for driving the defective material on the bearing plate down. After the microcomputer hydraulic pressure testing machine finishes working, the cleaning device can remove the residual materials on the lower bearing plate, the possibility of residual material accumulation on the lower bearing plate is reduced, and therefore the purpose of improving the cleanliness of the microcomputer hydraulic pressure testing machine is achieved.
Description
Technical Field
The application relates to the field of testing instruments, in particular to a clean microcomputer hydraulic pressure testing machine.
Background
The pressure tester is a static force tester, is a common device used for mechanical property tests of materials, parts and components, has wide application, is widely applied to scientific research units, universities and colleges, quality detection units and engineering construction units, and is commonly used for detecting the mechanical property of cement, concrete and steel structures in the building engineering.
The utility model discloses a current computer hydraulic pressure testing machine concrete structure can refer to the utility model patent that the grant bulletin number is CN203350126U, including bed frame and hydraulic pressure station, hydraulic pressure station fixed mounting be in the bottom of bed frame, the top at hydraulic pressure station are equipped with the pneumatic cylinder, the cylinder body and the bed frame fixed connection of pneumatic cylinder, the vertical upwards setting of piston rod of pneumatic cylinder, and the top rigid coupling of piston rod has pressure sensor, and pressure sensor top level is fixed and is provided with down the bearing plate, the bed frame has a plurality of support guide pillars, down the bearing plate with support guide pillar sliding connection, the top of bed frame is provided with the pressure-bearing device, the bottom fixed connection who goes up the pressure-bearing device has the lower bearing plate that the. In the using process, a detected object is placed on the lower bearing plate, the piston rod of the hydraulic cylinder is controlled to move upwards, the detected object can be subjected to the pressure between the upper bearing plate and the lower bearing plate, and therefore the pressure-resistant condition of the detected object can be detected.
According to the related technology, when the pressure between the upper bearing plate and the lower bearing plate is too high, the detection object has fragments, scraps and other residual materials to fall off, and the fallen residual materials are remained on the lower bearing plate, so that the cleanliness of the microcomputer hydraulic pressure testing machine is low.
SUMMERY OF THE UTILITY MODEL
In order to promote computer hydraulic pressure testing machine's cleanliness, this application provides a clean type computer hydraulic pressure testing machine.
The application provides a clean type computer hydraulic pressure testing machine adopts following technical scheme:
a cleaning type microcomputer hydraulic pressure testing machine comprises a machine frame, a hydraulic cylinder, a lower bearing plate, an upper bearing plate and a control auxiliary machine, wherein the machine frame is placed on the ground, the hydraulic cylinder is vertically arranged at the lower part of the machine frame, a cylinder body of the hydraulic cylinder is fixedly connected with the machine frame, the lower bearing plate is horizontally arranged above the hydraulic cylinder, the lower bearing plate is fixedly connected with a piston rod of the hydraulic cylinder, the upper bearing plate is positioned above the lower bearing plate, the upper bearing plate is fixedly connected with the machine frame, the control auxiliary machine is arranged at one side of the machine frame, the control auxiliary machine is used for controlling and monitoring the working condition of the pressure testing machine, the cleaning type microcomputer hydraulic pressure testing machine also comprises a cleaning device, the cleaning device comprises a detection seat, a lead screw, a guide rod, a sliding block and a brush, the detection seat is in a horizontal square box shape with an opening at the upper side, the middle part of the lower, lower bearing plate downside and the upside fixed connection of bellied seat, the lead screw, guide bar and slider all set up the one side at detecting a horizontal direction, lead screw and guide bar all are parallel with detection seat one end length direction, the lead screw both ends are rotated and are connected in the frame, lead screw one end is provided with drive lead screw pivoted motor outward, guide bar both ends fixed connection is in the frame, slider and lead screw threaded connection, and slider and guide bar horizontal sliding connection, the brush level sets up in lower bearing plate top, brush one end fixed connection is on the slider, the brush hair and the lower bearing plate upside contact of brush.
Through adopting above-mentioned technical scheme, after microcomputer hydraulic pressure testing machine work was accomplished, the defective material that detects the thing and drop can be stayed down on the bearing plate, can make motor control slider drive the brush and remove along guide bar length direction, and the brush can sweep the defective material on the bearing plate down to detecting in the seat this moment, has reduced the possibility of piling up the defective material on the bearing plate down to reach the purpose that promotes microcomputer hydraulic pressure testing machine cleanliness.
Preferably, the protruding seat is frustum-shaped, and the edge of the upper side surface of the protruding seat coincides with the edge of the upper side surface of the lower pressure bearing plate.
By adopting the technical scheme, when the hairbrush cleans the residual materials on the lower bearing plate, the residual materials on the lower bearing plate can slide down to the bottom surface of the detection seat along the peripheral wall of the raised seat from the lower bearing plate, the inclined slope surface of the peripheral wall of the raised seat can buffer the process that the materials fall down to the bottom surface of the detection seat from the lower bearing plate, the possibility that the residual materials splash to the outside of the detection seat is reduced, and therefore the aim of improving the cleanliness of the microcomputer hydraulic pressure testing machine is achieved.
Preferably, the two sides of the detection seat perpendicular to the length direction of the screw rod are hinged surfaces, the lower end of the hinged surface is hinged to the bottom surface of the detection seat, the two side surfaces of the detection seat parallel to the screw rod are fixed surfaces, and the hinged surfaces are detachably and fixedly connected with the fixed surfaces.
By adopting the technical scheme, after the cleaning device is used for a period of time, more residual materials can be accumulated in the detection seat, and the hinged surface can be opened relative to the bottom surface of the detection seat, so that an operator can conveniently clear the residual materials in the detection seat.
Preferably, a plurality of bolts are arranged on the outer side of the fixing surface, and the bolts penetrate through the fixing surface and are in threaded connection with the hinge surface.
By adopting the technical scheme, an operator can open the hinged surface by unscrewing the bolt relative to the hinged surface and can fix the hinged surface by screwing the bolt relative to the hinged surface, so that the aim of convenient operation is fulfilled.
Preferably, the bottom surface of the detection seat is inclined from the convex seat to the hinge surface.
Through adopting above-mentioned technical scheme, after cleaning device used a period, the defective material in the detection seat can pile up more, detects the seat bottom surface and opens the hinge face this moment relatively, and most defective material can directly follow the roll-off in detecting the seat, makes things convenient for the manual work to clear away the defective material in the detection seat.
Preferably, sealing strips are arranged between the hinge joint surface and the bottom surface of the detection seat and between the hinge joint surface and the fixed surface, and the sealing strips are fixedly connected with the hinge joint surface.
By adopting the technical scheme, in the using process, the sealing strip can block gaps between the hinge surface and the fixed surface and between the hinge surface and the bottom surface of the detection seat, so that the possibility of leakage of residual materials from between the hinge surface and the fixed surface or between the hinge surface and the bottom surface of the detection seat is reduced, and the aim of improving the cleanness of the pressure testing machine is fulfilled.
Preferably, the position on the rack close to the lower bearing plate is vertically provided with scales, and the scales are used for displaying the rising height of the lower bearing plate.
Through adopting above-mentioned technical scheme, in the use, can learn down the height of bearing plate rebound, convenient operation through observing and detecting the scale change that the seat downside flushes.
Preferably, the detection seat is fixedly connected with a pointer, the pointer is horizontally arranged, the tip of the pointer is located close to the scale, and the tip of the pointer is flush with the scale of the rising height of the lower pressure bearing plate.
Through adopting above-mentioned technical scheme, it is far away with the scale interval to detect the seat downside, can produce the vision poor from different visual angles, and the pointer is nearer apart from the scale, has reached the purpose that increases the precision that the operating personnel observed lower bearing plate rebound height.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the aim of improving the cleanliness of the microcomputer hydraulic pressure testing machine is fulfilled by arranging the detection seat, the lead screw, the guide rod, the slide block and the brush;
2. the purpose of improving the cleanliness of the microcomputer hydraulic pressure testing machine is achieved by arranging the convex seat;
3. the purpose of conveniently and manually removing the residual materials in the detection seat is achieved by arranging the hinged surface.
Drawings
FIG. 1 is a perspective view of a clean microcomputer hydraulic pressure tester of the present application;
fig. 2 is an enlarged view of a portion a of fig. 1.
Description of reference numerals: 1. a frame; 11. calibration; 2. a hydraulic cylinder; 3. a lower bearing plate; 4. an upper bearing plate; 5. controlling the auxiliary machine; 6. a cleaning device; 61. a detection seat; 611. a boss base; 612. a hinged surface; 6121. a sealing strip; 613. a fixed surface; 6131. a bolt; 614. a pointer; 62. a lead screw; 63. a guide bar; 64. a slider; 65. and a brush.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses clean type computer hydraulic pressure testing machine. Referring to fig. 1, the cleaning type microcomputer hydraulic pressure tester includes a frame 1, a hydraulic cylinder 2, a lower bearing plate 3, an upper bearing plate 4, a control auxiliary machine 5 and a cleaning device 6, the frame 1 is placed on the ground, the hydraulic cylinder 2 is vertically arranged at the lower part of the frame 1, the cylinder body of the hydraulic cylinder 2 is fixedly connected with the frame 1, the lower bearing plate 3 is horizontally arranged above the hydraulic cylinder 2, the lower bearing plate 3 is fixedly connected with the piston rod of the hydraulic cylinder 2, the upper bearing plate 4 is arranged above the lower bearing plate 3, the upper bearing plate 4 is fixedly connected with the frame 1, the control auxiliary machine 5 is installed at one side of the frame 1, the control auxiliary machine 5 is used for controlling and monitoring the working condition of the pressure tester, and the cleaning device 6 is used for removing the residual. In the using process, a detected object is placed on the upper side of the lower bearing plate 3, the auxiliary machine 5 is controlled to control the piston rod of the hydraulic cylinder 2 to move upwards, the lower bearing plate 3 gradually rises at the moment, when the upper side of the detected object abuts against the upper bearing plate 4, the piston rod of the hydraulic cylinder 2 continues to move upwards, the pressure between the upper bearing plate 4 and the lower bearing plate 3 on the detected object gradually rises, and therefore the purpose of performing pressure test on the detected object is achieved; the object to be detected can have the defective material such as fragment, piece to drop in the testing process, and the defective material that drops can remain on bearing plate 3 down, and cleaning device 6 can clear away the defective material on bearing plate 3 down to the mesh that has reached improvement computer hydraulic pressure testing machine cleanliness.
Referring to fig. 1, the cleaning device 6 includes a detection base 61, a lead screw 62, a guide rod 63, a slider 64 and a brush 65, the detection base 61 is in a horizontal square box shape with an open upper side, the middle of the lower bottom surface of the detection base 61 protrudes upwards, the protruding portion of the detection base 61 is a protruding base 611, the lower bottom surface of the detection base 61 is located between the lower bearing plate 3 and the cylinder body of the hydraulic cylinder 2, the lower side of the lower bearing plate 3 is fixedly connected with the upper side of the protruding base 611, the lead screw 62, the guide rod 63 and the slider 64 are all arranged on one side of the detection base 61 in the horizontal direction, the lead screw 62 and the guide rod 63 are all parallel to the length direction of one end of the detection base 61, two ends of the lead screw 62 are rotatably connected to the frame 1, a motor for driving the lead screw 62 to rotate is arranged outside one end of the lead screw 62, two ends of the guide rod 63 are fixedly connected to the frame 1, one end of the brush 65 is fixedly connected to the sliding block 64, and the brush hairs of the brush 65 contact with the upper side of the lower bearing plate 3. After the microcomputer hydraulic pressure testing machine finishes working, the residual materials falling off from the detected objects can be left on the lower bearing plate 3, the motor control slide block 64 can drive the brush 65 to move along the length direction of the guide rod 63, at the moment, the brush 65 can sweep the residual materials on the lower bearing plate 3 down into the detection seat 61, the possibility of residual material accumulation on the lower bearing plate 3 is reduced, and therefore the purpose of improving the cleanliness of the microcomputer hydraulic pressure testing machine is achieved.
When the brush 65 sweeps the remnants on the lower bearing plate 3, because there is a certain height difference between the lower bearing plate 3 and the bottom surface of the detection seat 61, when the remnants on the lower bearing plate 3 fall from the lower bearing plate 3 to the bottom surface of the detection seat 61, the remnants may splash to the outside of the detection seat 61, so that the cleanliness of the microcomputer hydraulic pressure testing machine is reduced. In order to further improve the cleanliness of the microcomputer hydraulic pressure tester, referring to fig. 1, the protrusion seat 611 may be formed in a frustum shape, and an upper side edge of the protrusion seat 611 coincides with an upper side edge of the lower pressure bearing plate 3. When the brush 65 cleans the remnants on the lower bearing plate 3, the remnants on the lower bearing plate 3 can slide down to the bottom surface of the detection seat 61 along the peripheral wall of the convex seat 611 from the lower bearing plate 3, and the inclined slope surface of the peripheral wall of the convex seat 611 can buffer the process that the materials fall from the lower bearing plate 3 to the bottom surface of the detection seat 61, so that the possibility that the remnants are splashed to the outside of the detection seat 61 is reduced, and the aim of improving the cleanliness of the microcomputer hydraulic pressure testing machine is fulfilled.
After the cleaning device 6 is used for a period of time, the residual materials in the detection seat 61 are accumulated more, and at this time, a person needs to manually remove the residual materials in the detection seat 61. In order to facilitate manual removal of the residual materials in the detection seat 61, referring to fig. 1 and 2, two sides of the detection seat 61 perpendicular to the length direction of the screw rod 62 may be provided with a hinge surface 612, the lower end of the hinge surface 612 is hinged to the bottom surface of the detection seat 61, two side surfaces of the detection seat 61 parallel to the screw rod 62 are provided with a fixing surface 613, a plurality of bolts 6131 are arranged outside the fixing surface 613, and the bolts 6131 penetrate through the fixing surface 613 to be in threaded connection with the hinge surface 612. After the cleaning device 6 is used for a period of time, more residual materials are accumulated in the detection seat 61, and the hinge surface 612 can be opened relative to the bottom surface of the detection seat 61, so that an operator can conveniently remove the residual materials in the detection seat 61; an operator unscrews the bolt 6131 relative to the hinge surface 612 to open the hinge surface 612, and screws the bolt 6131 relative to the hinge surface 612 to fix the hinge surface 612, so that the aim of convenient operation is fulfilled.
After the cleaning device 6 is used for a period of time, the residual materials in the detecting base 61 are accumulated more, the hinge surface 612 is opened relative to the bottom surface of the detecting base 61, then the residual materials are manually pulled out of the detecting base 61, and the bottom surface of the detecting base 61 can be set to incline from the protruding base 611 to the hinge surface 612 in order to take out the residual materials from the detecting base 61. After the cleaning device 6 is used for a period of time, the residual materials in the detection seat 61 are accumulated more, at this time, the hinge surface 612 is opened relative to the bottom surface of the detection seat 61, most of the residual materials can directly slide out of the detection seat 61, and the residual materials in the detection seat 61 can be conveniently removed manually.
When the motor drives the brush 65 to sweep the remainder on the lower pressure plate 3 down to the testing seat 61, if the diameter of the remainder particle is smaller, the remainder may leak from between the hinge surface 612 and the fixing surface 613 or between the hinge surface 612 and the bottom surface of the testing seat 61, thereby reducing the cleanness of the pressure testing machine. In order to improve the cleanness of the compression testing machine, referring to fig. 2, sealing strips 6121 may be disposed between the hinge surface 612 and the bottom surface of the detection seat 61 and between the hinge surface 612 and the fixing surface 613, and the sealing strips 6121 are fixedly connected to the hinge surface 612. In the using process, the sealing strip 6121 can block the gap between the hinge surface 612 and the fixing surface 613 and the gap between the hinge surface 612 and the bottom surface of the detection seat 61, so as to reduce the possibility that the residual material leaks from the gap between the hinge surface 612 and the fixing surface 613 or the gap between the hinge surface 612 and the bottom surface of the detection seat 61, thereby achieving the purpose of improving the cleanness of the pressure testing machine.
In order to facilitate the operator to observe the upward moving height of the lower bearing plate 3, referring to fig. 1, a scale 11 may be vertically disposed on the frame 1 at a position close to the lower bearing plate 3, the scale 11 is used to display the ascending height of the lower bearing plate 3, a pointer 614 may be fixedly connected to the detection base 61, the pointer 614 is horizontally disposed, the tip of the pointer 614 is located close to the scale 11, and the tip of the pointer 614 is flush with the scale 11 of the ascending height of the lower bearing plate 3. In the using process, the upward moving height of the lower bearing plate 3 can be known by observing the change of the scales 11 which are flush with the lower side of the detection seat 61, so that the operation is convenient; the distance between the lower side of the detection seat 61 and the scale 11 is far, visual difference can be generated from different visual angles, and the pointer 614 is close to the scale 11, so that the purpose of increasing the precision of the operator for observing the upward moving height of the lower pressure bearing plate 3 is achieved.
The implementation principle of the clean microcomputer hydraulic pressure testing machine in the embodiment of the application is as follows: in the use, the detection object is placed on the upper side of the lower bearing plate 3, the piston rod of the hydraulic cylinder 2 is controlled by the auxiliary control unit 5 to move upwards, the lower bearing plate 3 gradually rises at the moment, when the upper side of the detection object is abutted to the upper bearing plate 4, the piston rod of the hydraulic cylinder 2 continues to move upwards, the pressure on the detection object between the upper bearing plate 4 and the lower bearing plate 3 gradually rises, after the microcomputer hydraulic pressure testing machine finishes working, the residual material falling off from the detection object can be remained on the lower bearing plate 3, the driving motor controls the sliding block 64 to drive the brush 65 to move along the length direction of the guide rod 63, the brush 65 can sweep the residual material on the lower bearing plate 3 into the detection seat 61 at the moment, the possibility of accumulating the residual material on the lower bearing plate 3 is reduced, and the aim of improving the cleanliness of the microcomputer hydraulic pressure.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a clean type computer hydraulic pressure testing machine, which comprises a frame (1), pneumatic cylinder (2), lower bearing plate (3), go up bearing plate (4) and control auxiliary machine (5), frame (1) is placed subaerial, pneumatic cylinder (2) vertical setting is in frame (1) lower part, the cylinder body and frame (1) fixed connection of pneumatic cylinder (2), lower bearing plate (3) level sets up in pneumatic cylinder (2) top, the piston rod fixed connection of lower bearing plate (3) and pneumatic cylinder (2), it is located lower bearing plate (3) top to go up bearing plate (4), go up bearing plate (4) and frame (1) fixed connection, control auxiliary machine (5) are installed in frame (1) one side, control auxiliary machine (5) are used for control and monitoring pressure testing machine behavior, its characterized in that: the cleaning type microcomputer hydraulic pressure testing machine further comprises a cleaning device (6), the cleaning device (6) comprises a detection seat (61), a lead screw (62), a guide rod (63), a sliding block (64) and a brush (65), the detection seat (61) is in a horizontal square box shape with an open upper side, the middle of the lower bottom surface of the detection seat (61) protrudes upwards, the protruding part of the detection seat (61) is arranged to be a protruding seat (611), the lower bottom surface of the detection seat (61) is positioned between a lower pressure bearing plate (3) and a cylinder body of a hydraulic cylinder (2), the lower side of the lower pressure bearing plate (3) is fixedly connected with the upper side of the protruding seat (611), the lead screw (62), the guide rod (63) and the sliding block (64) are all arranged on one side of the detection seat (61) in the horizontal direction, the lead screw (62) and the guide rod (63) are all parallel to the length direction of one end of the detection seat (61, lead screw (62) one end is provided with drive lead screw (62) pivoted motor outward, guide bar (63) both ends fixed connection is on frame (1), slider (64) and lead screw (62) threaded connection, and slider (64) and guide bar (63) horizontal sliding connection, brush (65) level sets up in bearing plate (3) top down, brush (65) one end fixed connection is on slider (64), the brush hair and the contact of bearing plate (3) upside down of brush (65).
2. The cleaning type microcomputer hydraulic pressure tester according to claim 1, characterized in that: the protruding seat (611) is frustum-shaped, and the edge of the upper side face of the protruding seat (611) is overlapped with the edge of the upper side face of the lower bearing plate (3).
3. The cleaning type microcomputer hydraulic pressure tester according to claim 2, characterized in that: the two sides of the detection seat (61) perpendicular to the length direction of the lead screw (62) are hinged surfaces (612), the lower end of each hinged surface (612) is hinged to the bottom surface of the detection seat (61), two parallel side surfaces of the detection seat (61) and the lead screw (62) are fixed surfaces (613), and the hinged surfaces (612) and the fixed surfaces (613) are detachably and fixedly connected.
4. The cleaning type microcomputer hydraulic pressure tester according to claim 3, characterized in that: the outer side of the fixing surface (613) is provided with a plurality of bolts (6131), and the bolts (6131) penetrate through the fixing surface (613) to be in threaded connection with the hinge surface (612).
5. The cleaning type microcomputer hydraulic pressure tester according to claim 4, characterized in that: the bottom surface of the detection seat (61) inclines from the convex seat (611) to the hinge surface (612).
6. The cleaning type microcomputer hydraulic pressure tester according to claim 3, characterized in that: sealing strips (6121) are arranged between the hinged surface (612) and the bottom surface of the detection seat (61) and between the hinged surface (612) and the fixed surface (613), and the sealing strips (6121) are fixedly connected with the hinged surface (612).
7. The cleaning type microcomputer hydraulic pressure tester according to claim 1, characterized in that: the lifting mechanism is characterized in that scales (11) are vertically arranged on the position, close to the lower bearing plate (3), of the rack (1), and the scales (11) are used for displaying the lifting height of the lower bearing plate (3).
8. The cleaning type microcomputer hydraulic pressure tester according to claim 7, characterized in that: the pointer (614) is fixedly connected to the detection seat (61), the pointer (614) is horizontally arranged, the tip of the pointer (614) is located close to the scale (11), and the tip of the pointer (614) is flush with the scale (11) at the rising height of the lower pressure bearing plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022146998.XU CN213544239U (en) | 2020-09-25 | 2020-09-25 | Clean type computer hydraulic pressure testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022146998.XU CN213544239U (en) | 2020-09-25 | 2020-09-25 | Clean type computer hydraulic pressure testing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213544239U true CN213544239U (en) | 2021-06-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022146998.XU Expired - Fee Related CN213544239U (en) | 2020-09-25 | 2020-09-25 | Clean type computer hydraulic pressure testing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213544239U (en) |
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2020
- 2020-09-25 CN CN202022146998.XU patent/CN213544239U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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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: 20210625 Termination date: 20210925 |