CN112324481A - Safety device of anchor rope - Google Patents
Safety device of anchor rope Download PDFInfo
- Publication number
- CN112324481A CN112324481A CN202011359510.XA CN202011359510A CN112324481A CN 112324481 A CN112324481 A CN 112324481A CN 202011359510 A CN202011359510 A CN 202011359510A CN 112324481 A CN112324481 A CN 112324481A
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- CN
- China
- Prior art keywords
- anchor
- sleeve
- buffer
- pipe
- rope
- 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.)
- Pending
Links
- 230000001681 protective effect Effects 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 10
- 230000003139 buffering effect Effects 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 208000027418 Wounds and injury Diseases 0.000 abstract description 5
- 230000006378 damage Effects 0.000 abstract description 5
- 208000014674 injury Diseases 0.000 abstract description 5
- 230000005465 channeling Effects 0.000 abstract description 3
- 239000003245 coal Substances 0.000 abstract description 3
- 238000005065 mining Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 238000006748 scratching Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention relates to a safety protection device of an anchor cable, belonging to the technical field of coal fully-mechanized mining support; the safety protection device comprises a protection pipe, a tension spring, a connecting rope and an alarm module, wherein the protection pipe comprises a sleeve and a base, the base is detachably arranged at the bottom of the sleeve, a buffer spring, a buffer plate and a buffer block are sequentially arranged in the protection pipe from bottom to top, the lower end of the anchor rope is inserted in the protection pipe, a baffle plate is arranged in the sleeve, and a clamping ring is arranged on the anchor rope; the tension spring is fixed between the lockset and the protective tube; two sides of the protective pipe are connected with the anchor net on the top wall through connecting ropes; the alarm module comprises a control box, a detection lead and an alarm voice box, wherein the control box and the voice alarm box are arranged on the top wall and are connected through the lead, and the detection lead is arranged between the control box and the protective pipe; the problem of injury caused by the phenomena of anchor cable steel strand breakage, wire channeling, anchor slipping and anchor falling is solved.
Description
Technical Field
The invention belongs to the technical field of coal fully-mechanized mining support, and particularly relates to a safety protection device for an anchor cable.
Background
In order to improve the tunneling efficiency of coal mine roadway engineering, an anchor net cable supporting mode is mostly adopted, an anchor cable is formed by combining four parts, namely a prestressed steel strand, a base plate, an anchorage device (clamp) and an anchoring agent, after the roadway is dug and supported, the roadway is influenced by ground stress, structural stress and mining, the stress distribution of surrounding rocks of the roadway is uneven, local stress is concentrated, the phenomena of breakage of the anchor cable steel strand, wire channeling, gliding and anchor detachment of the anchorage device and the like sometimes occur, and potential safety hazards are formed for field operators or pedestrians in the roadway; in addition, the anchor cable head of the constructed low-position anchor cable has the hidden danger of scratching and scratching the operators and pedestrians. In recent years, many mines have been in succession to have many such casualties. At present, the whole hidden danger that a tensioning end falls and a wire flees to hurt people caused by the breakage of a steel strand of an anchor cable supporting roadway only achieves different types of passive protection and is not solved essentially.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a safety protection device of an anchor cable; the problem of injury caused by the phenomena of breakage of the steel strand of the existing anchor cable, wire channeling, gliding and anchor dropping of the anchorage device and the like is solved.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
The utility model provides a safety device of anchor rope, the anchor rope is fixed in its characterized in that on the tunnel roof from last to being fixed in down respectively through anchor rope layer board, aligning ball pad, anchor rope tool to lock: the safety protection device comprises a protection pipe, a tension spring, a connecting rope and an alarm module, wherein the protection pipe comprises a sleeve and a base, the base is detachably arranged at the bottom of the sleeve and seals the sleeve, a buffer spring, a buffer plate and a buffer block are sequentially arranged in the protection pipe from bottom to top, the lower end of the anchor cable is inserted in the protection pipe and is in contact with the upper surface of the buffer block, a plurality of groups of blocking pieces are arranged in the sleeve, and a plurality of clamping rings are arranged on the anchor cable; the tension spring is sleeved on the outer side of the anchor cable and fixed between the lock and the protective pipe; two sides of the protective pipe are connected with the anchor net on the top wall through connecting ropes; the alarm module comprises a control box, a detection wire and an alarm voice box, wherein the control box and the voice alarm box are arranged on the top wall of the roadway beside the anchor cable and are connected through the wire, and the detection wire is arranged between the control box and the protective pipe.
Furthermore, the bottom of the protective pipe is detachably connected with a buffer ball, the outer part of the buffer ball is made of soft rubber, and the inner part of the buffer ball is made of plastic bubble buffer.
Further, the buffer ball is in threaded connection with the protective pipe.
Furthermore, the number of the blocking pieces in one group is two, and the blocking pieces are symmetrically arranged on two sides in the sleeve.
Furthermore, the blocking piece is of an elastic structure which is obliquely arranged downwards.
Furthermore, connect the rope and include the connection iron wire of high strength extension spring and both sides.
Furthermore, a wireless module is arranged in the control box.
Compared with the prior art, the invention has the following beneficial effects: the invention discloses a method for protecting a support anchor rope, which is characterized in that a casualty accident caused by the anchor rope head happens occasionally, the injury characteristics of the anchor rope head are analyzed, the conditions that a backing plate and a lock fall and smash people, a steel strand of the anchor rope head breaks and hurts people, the scratch of the anchor rope head hurts people and the like are mainly caused, and the external characteristics and the injury characteristics of the support anchor rope are combined.
Through having cup jointed the antiskid pipe on exposing the anchor rope tool to lock lower extreme, solved anchor rope head and scraped fish tail hidden danger and anchor rope head and scurry the silk and injure people hidden danger.
Through the baffle plate in the protective pipe, the buffer part, the external tension spring and the connection tension spring, the tensile elastic potential energy of the broken anchor cable end is converted into the reciprocating kinetic energy of the elastic part to offset the energy released instantly after the broken anchor cable of the anchor cable end, so that the constructors are protected from being injured.
The inside separation blade and the joint circle of being provided with respectively of protective tube on with the anchor rope for the anchor rope after the fracture can the joint inside the protective tube, can not fall at will and take place to hinder the people accident in other regions.
The protective pipe is connected with the anchor net through the connecting ropes on the two sides, so that the problem that the tension ends (an anchorage device and an anchor cable tray) fall to injure people due to breakage of the anchor cable steel strands can be effectively solved.
The lower part of the protective pipe is provided with the buffer ball, so that even if the protective pipe contacts an operator, the injury can be minimized.
Drawings
The invention is described in further detail below with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of the present invention as a whole;
wherein, 1 is the anchor rope, 2 is the roof, 3 is the anchor rope tray, 4 is the aligning ball pad, 5 is the tool to lock, 6 is the protective tube, 7 is the sleeve pipe, 8 is the base, 9 is the extension spring, 10 is the buffer block, 11 is the buffer board, 12 is buffer spring, 13 is the separation blade, 14 is the joint circle, 15 is the cushion ball, 16 is soft rubber, 17 is the plastics bubble buffer, 18 is rings, 19 is the connection iron wire, 20 is the connection extension spring, 21 is the connection rope, 22 is the control box, 23 is the pronunciation warning box, 24 is the detection wire, 25 is the anchor net.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
As shown in fig. 1, the invention provides a safety protection device for an anchor cable, which is fixed at the lower end of the anchor cable 1 in a roadway, wherein an anchor cable tray 3, a self-aligning ball pad 4 and a lock 5 are sequentially installed on the anchor cable 1 extending out of a roadway top wall 2, an anchor net 25 is fixed on the roadway top wall 2, and the safety protection device comprises a protection pipe 6, a tension spring 9, a connecting rope 21 and an alarm module.
The protective pipe 6 is of a tubular structure with an inner hole and comprises a sleeve 7 and a base 8, an internal thread is arranged at the lower end of the sleeve 7, the sleeve 7 is in threaded connection with the base 8 through the internal thread, and the protective pipe 6 is sleeved at the lower end of the anchor cable 1; the tension spring 9 is arranged between the protective pipe 6 and the lock 5, the upper end of the tension spring is fixed with the lower end face of the lock 5, and the lower end of the tension spring is fixed with the upper end of the protective pipe 6; a buffer spring 12, a buffer plate 11 and a buffer block 10 are sequentially arranged at the bottom of the inner side of the protection pipe 6 from bottom to top, and one end face, far away from the buffer spring 12, of the buffer block 10 is in contact with the lower end of the anchor cable 1; the upper end area of the buffer block 10 in the protective pipe 6 is provided with a plurality of groups of opposite blocking pieces 13, the blocking pieces 13 are obliquely arranged towards the inner bottom end of the protective pipe 6, a gap for the anchor cable 1 to pass through is reserved between two blocking pieces 13 in the same group, the same number of clamping rings 14 are correspondingly fixed on the anchor cable 1, the clamping rings 14 face obliquely upward, and in the initial state, the clamping ring 14 at the lowest end of the anchor cable 1 is positioned on the upper portion of the blocking piece 13 at the highest end of the protective pipe 6. The protective pipe 6 lower extreme is provided with the external screw thread, and protective pipe 6 passes through external screw thread spiro union has buffering ball 15, buffering ball 15 outside is soft rubber 16, and inside is plastic bubble buffer 17, is used for preventing safety device collides constructor's head. Two hanging rings 18 are symmetrically welded on two sides of the upper end of the protective pipe 6 and used for hanging connecting ropes 21.
Connecting rope 21 including connect extension spring 20 and fixed connection in connect the connection iron wire 19 of extension spring 20 both sides, the one end of connecting iron wire 19 and keeping away from to connect extension spring 20 passes respectively rings 18 on rings 18 and the anchor net 25 and folding, and the connection iron wire 19 after folding is fixed mutually through the clamp. The protective tube 6 is connected to the anchor net 25 of the top wall 2 by connecting cables 21 on both sides.
The alarm module comprises a control box 22, a detection wire 24 and an alarm voice box 23, wherein a wireless module is arranged in the control box 22, the control box 22 and the voice alarm box 23 are arranged on the roadway top wall 2 beside the anchor cable 1 and are connected through a wire, and the detection wire 24 is arranged between the control box 22 and the protective pipe 6.
The principle and the working method of the invention are as follows: when the anchor cable 1 is broken and separated, the protective pipe 6 at the lower end of the anchor cable 1 starts to move downwards, the tension spring 9 at the upper part of the protective pipe 6 starts to stretch, the connecting ropes 21 at the two sides of the protective pipe 6 start to be tightened, the tension spring 20 in the middle of the connecting ropes 21 also starts to stretch, as the anchor cable 1 is broken and has higher impact speed, the anchor cable 1 passes through the limit of the baffle piece 13 inside the protective pipe 6 and acts on the surface of the buffer block 10, the buffer block 10 acts on the buffer plate 11 and the buffer spring 12, and finally the buffer spring 12 is kept in a compression state by acting force. Because the clamping ring 14 on the anchor cable 1 and the blocking piece 13 in the protective pipe 6 are mutually clamped, the anchor cable 4 which extends into the protective pipe 6 cannot be freely popped out, and the accident that the broken anchor cable 1 is separated from the protective pipe 6 to hurt people is avoided. Meanwhile, the tension spring 9 and the connecting tension spring 20 perform reciprocating stretching motion instantaneously under the action of inertia. Through the buffering inside the protective tube 6 and the reciprocating telescopic motion of the external tension spring 9 and the connecting tension spring 20, the release of elastic potential energy caused by the fracture of the anchor cable 1 is counteracted, and the impact force generated when the anchor cable 1 is fractured is relieved.
If the safety protection device contacts with the worker after the anchor cable 1 is broken, the stress area is enlarged due to elastic deformation when the buffer ball 15 screwed at the bottom of the protection pipe 6 contacts with the operator, so that the pressure intensity received by collision is reduced, and the protection effect on the worker is achieved.
When the tension spring 9 is stretched after the anchor cable 1 is broken, the detection wire 24 is broken due to tension, the control box 22 detects a signal that the detection wire 24 is broken, the voice alarm box 23 is controlled to send out alarm voice to remind surrounding workers of avoiding the broken anchor cable 1, and the broken signal of the anchor cable 1 is sent to the control room through the wireless module to remind the workers of timely processing the broken anchor cable.
Inside anchor rope 1 joint after the fracture is in protective tube 6, during post processing, unscrew the buffer ball 15 and the base 8 of protective tube 6 bottom, can tear buffer spring 12, buffer board 11, buffer block 10 open, then will be extracted by fracture anchor rope 1 of joint, then pack back buffer spring 12, buffer board 11, buffer block 10 to protective tube 6 in proper order, screw up base 8 and buffer ball 15 at last, like this safety device just can continue to use.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The utility model provides a safety device of anchor rope, anchor rope (1) is fixed in on tunnel roof (2) from last to down through anchor rope tray (3), aligning ball pad (4), tool to lock (5) respectively, its characterized in that: the safety protection device comprises a protection pipe (6), a tension spring (9), a connecting rope (21) and an alarm module, wherein the protection pipe (6) comprises a sleeve (7) and a base (8), the base (8) is detachably arranged at the bottom of the sleeve (7) and seals the sleeve (7), a buffer spring (12), a buffer plate (11) and a buffer block (10) are sequentially arranged inside the protection pipe (6) from bottom to top, the lower end of the anchor cable (1) is inserted inside the protection pipe (6) and is in contact with the upper surface of the buffer block (10), a plurality of groups of blocking pieces (13) are arranged inside the sleeve (7), and a plurality of clamping rings (14) are arranged on the anchor cable (1); the tension spring (9) is sleeved on the outer side of the anchor cable (1) and fixed between the lock (5) and the protective pipe (6); two sides of the protective pipe (6) are connected with an anchor net (25) on the top wall (1) through connecting ropes (21); the alarm module comprises a control box (22), a detection wire (24) and an alarm voice box (23), wherein the control box (22) and the voice alarm box (23) are arranged on the roadway top wall (2) and are connected through the wire, and the detection wire (24) is arranged between the control box (22) and the protective pipe (6).
2. A safety shield for a cable bolt according to claim 1, wherein: the protective pipe bottom (6) is detachably connected with a buffering ball (15), the outside of the buffering ball (15) is soft rubber (16), and the inside of the buffering ball is plastic bubble buffering matter (17).
3. A safety shield for a cable bolt according to claim 2, wherein: the buffer ball (15) is in threaded connection with the protective pipe (6).
4. A safety shield for a cable bolt according to claim 1, wherein: the number of the baffle plates (13) is two, and the baffle plates are symmetrically arranged on two sides of the interior of the sleeve (7).
5. A safety shield for a cable bolt according to claim 1, wherein: the baffle sheet (13) is an elastic structure which is obliquely arranged downwards.
6. A safety shield for a cable bolt according to claim 1, wherein: the clamping ring (14) is a rigid structure arranged obliquely upwards.
7. A safety shield for a cable bolt according to claim 1, wherein: the connecting rope (21) comprises a connecting tension spring (20) and connecting iron wires (19) on two sides.
8. A safety shield for a cable bolt according to claim 1, wherein: a wireless module is arranged in the control box (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011359510.XA CN112324481A (en) | 2020-11-27 | 2020-11-27 | Safety device of anchor rope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011359510.XA CN112324481A (en) | 2020-11-27 | 2020-11-27 | Safety device of anchor rope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112324481A true CN112324481A (en) | 2021-02-05 |
Family
ID=74308429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011359510.XA Pending CN112324481A (en) | 2020-11-27 | 2020-11-27 | Safety device of anchor rope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112324481A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD982428S1 (en) * | 2018-11-27 | 2023-04-04 | Sandvik Mining And Construction Australia Pty Ltd. | Mesh clamp |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06344863A (en) * | 1993-06-03 | 1994-12-20 | Tokai Rika Co Ltd | Pretensioner |
| CN206338082U (en) * | 2016-12-30 | 2017-07-18 | 王奇 | A kind of anchor cable support apparatus |
| CN207686745U (en) * | 2018-01-05 | 2018-08-03 | 张碧亮 | Anchor cable safety protection device for ends |
| CN108397220A (en) * | 2018-03-23 | 2018-08-14 | 李海斌 | A kind of anchor cable is anti-to be penetrated and monitoring device |
| CN207740022U (en) * | 2017-12-29 | 2018-08-17 | 山东东山新驿煤矿有限公司 | A kind of anchor cable breaks protective device |
| CN208168913U (en) * | 2018-04-23 | 2018-11-30 | 华北科技学院 | A kind of mine anchor rope component fracture prior-warning device |
| CN208310828U (en) * | 2018-06-11 | 2019-01-01 | 万晓伟 | A kind of anti-anchor cable dropping device |
| CN208396732U (en) * | 2018-06-13 | 2019-01-18 | 淮南大屯注浆工程有限公司 | A kind of coal mine anchor cable, anchor pole safety protection jacket |
| CN109339841A (en) * | 2018-11-20 | 2019-02-15 | 中煤新集能源股份有限公司 | Anchor cable secondary protection device |
| CN208749380U (en) * | 2018-07-10 | 2019-04-16 | 葛沛新 | A kind of roadway support anchor cable snaps safety guards |
| CN211397618U (en) * | 2020-01-15 | 2020-09-01 | 阳泉煤业(集团)股份有限公司一矿 | Anti-falling anchor cable device |
-
2020
- 2020-11-27 CN CN202011359510.XA patent/CN112324481A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06344863A (en) * | 1993-06-03 | 1994-12-20 | Tokai Rika Co Ltd | Pretensioner |
| CN206338082U (en) * | 2016-12-30 | 2017-07-18 | 王奇 | A kind of anchor cable support apparatus |
| CN207740022U (en) * | 2017-12-29 | 2018-08-17 | 山东东山新驿煤矿有限公司 | A kind of anchor cable breaks protective device |
| CN207686745U (en) * | 2018-01-05 | 2018-08-03 | 张碧亮 | Anchor cable safety protection device for ends |
| CN108397220A (en) * | 2018-03-23 | 2018-08-14 | 李海斌 | A kind of anchor cable is anti-to be penetrated and monitoring device |
| CN208168913U (en) * | 2018-04-23 | 2018-11-30 | 华北科技学院 | A kind of mine anchor rope component fracture prior-warning device |
| CN208310828U (en) * | 2018-06-11 | 2019-01-01 | 万晓伟 | A kind of anti-anchor cable dropping device |
| CN208396732U (en) * | 2018-06-13 | 2019-01-18 | 淮南大屯注浆工程有限公司 | A kind of coal mine anchor cable, anchor pole safety protection jacket |
| CN208749380U (en) * | 2018-07-10 | 2019-04-16 | 葛沛新 | A kind of roadway support anchor cable snaps safety guards |
| CN109339841A (en) * | 2018-11-20 | 2019-02-15 | 中煤新集能源股份有限公司 | Anchor cable secondary protection device |
| CN211397618U (en) * | 2020-01-15 | 2020-09-01 | 阳泉煤业(集团)股份有限公司一矿 | Anti-falling anchor cable device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD982428S1 (en) * | 2018-11-27 | 2023-04-04 | Sandvik Mining And Construction Australia Pty Ltd. | Mesh clamp |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210205 |