CN206754089U - It is a kind of to expand formula expansion bolt certainly - Google Patents
It is a kind of to expand formula expansion bolt certainly Download PDFInfo
- Publication number
- CN206754089U CN206754089U CN201720399958.1U CN201720399958U CN206754089U CN 206754089 U CN206754089 U CN 206754089U CN 201720399958 U CN201720399958 U CN 201720399958U CN 206754089 U CN206754089 U CN 206754089U
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- CN
- China
- Prior art keywords
- expansion
- screw
- externally threaded
- expansion column
- push rod
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of from expansion formula expansion bolt, one end is provided with externally threaded screw rod, multiple expansion columns that the screw rod includes being provided with the screw body of blind hole in the axial direction, being hinged away from external screw thread one end with screw body, the push rod matched with blind hole size, is arranged on the connecting rod that screw body is hinged with expansion column and push rod respectively away from externally threaded one end with expansion column quantity identical first through hole and through first through hole；The blind hole is additionally provided with the gripping mechanism for driving push rod movement close to the externally threaded side of screw body.The utility model is provided with push rod, connecting rod and expansion column, can effectively realize expansion by being used cooperatively for push rod, connecting rod and expansion column, while after the completion of use, can take out and be reused；The return of push rod can be realized automatically by being provided with return spring；Expansion column can be placed on by the first groove in the first groove so that the design storage is simple；It is simple in construction, practical.
Description
Technical field
The present invention relates to expansion bolt technical field, is a kind of expansion formula expansion bolt certainly specifically.
Background technology
At present, common expansion bolt construction is by the traction screw of cone-shaped end, expansion sleeve, pad, spring washer, nut.
Expansion set is all filled in the circular hole for the go-no-go being drilled in advance on wall during use, constantly tightens nut during use so that
Screwing force is delivered to expansion set by packing ring, pad, and center bolt pulls out against out of expansion set, has the center of circular conical surface design
The spreading of expansion set is made expansion bolt firmly be stuck in circular hole by screw end head.But after fixed position is discarded, due to expansion
Bolt expansion set has been deformed in fastening and has been stuck in hole, simultaneously because expansion set puts forth effort position without external, can not be taken out expansion set, from
And discarded expansion bolt can not be taken out, so as to be exposed to matrix surface, it is attractive in appearance while also result in matrix surface to influence matrix surface
Potential safety hazard, expansion bolt it is disposable also result in ample resources waste.
The content of the invention
It can be reused from expansion formula expansion bolt it is an object of the invention to provide a kind of, it is simple in construction, it is practical.
The present invention is achieved through the following technical solutions：It is a kind of from expanding formula expansion bolt, including one end be provided with it is externally threaded
Screw rod, the screw rod include being provided with the screw body of blind hole in the axial direction, are hinged with screw body away from external screw thread one end
Multiple expansion columns, matched with blind hole size push rod, be arranged on screw body away from externally threaded one end and expansion column quantity
Identical first through hole and the connecting rod being hinged respectively with expansion column and push rod through first through hole；The blind hole is close to screw rod
The externally threaded side of main body is additionally provided with the gripping mechanism for driving push rod movement.
Operation principle：In use, control push rod externally threaded away from screw body to blind hole by gripping mechanism
Side is moved, and the connecting rod being hinged in the case where push rod moves with push rod will make connecting rod externally threaded to remote screw body
Move side so that opened with the expansion column that connecting rod is hinged, after expansion column is opened, the free end of expansion column will connect with aperture wall
Touch so that screw body contacts with aperture wall realizes that expansion bolt is firmly stuck in hole.
Further, in order to preferably realize the present invention, the blind hole is provided with internal thread institute close to externally threaded one end
State screw rod；The gripping mechanism includes the regulating bolt being used cooperatively with blind hole internal thread.
Further, in order to preferably realize the present invention, the blind hole is provided with spring close to one end of expansion column.
Regulating bolt is with push rod close to the externally threaded end thereof contacts of screw body, when forward direction tightens regulating bolt, regulation
Screw is to the lateral movement driving push rod of expansion column one to the lateral movement of expansion column one so that expansion column is with being not in card after hole clamping
It is tight not in place.Set spring can realize when expansion bolt is taken out, due in use, push rod to expansion column side move,
So that push rod is compressed effect to spring close to one end of expansion column, and when taking out expansion bolt using completion, regulating bolt side
To twisting, spring is returning to reset condition from impaction state so that push rod moves to the side away from expansion column；Push rod moves
Expansion column will be driven to move downward so that expansion column and hole no longer clamping, so that expansion bolt takes out out of hole.
Further, in order to preferably realize the present invention, the spring is return spring.Aftertaste spring morning thrust removal
Afterwards, joint element is made to return to the spring of position.
Further, in order to preferably realize the present invention, the expansion column is provided with second close to the side of first through hole
Groove, the connecting rod are column articulated with expanding through the second groove.Second groove enables connecting rod close to one end of expansion column
Enough it is placed in the second groove.
Further, in order to preferably realize the present invention, the screw body is additionally provided with chi away from externally threaded side
The first groove that very little, position matches with expansion column, the expansion column are arranged in the first groove and are hinged with screw body.Set
First groove enables expansion column to be perfectly put into the first groove, when not in use so that expansion bolt storage is convenient.
A kind of that expansion formula expansion bolt, including one end are provided with externally threaded screw rod, the screw rod is included in the axial direction
It is provided with the screw body of blind hole, is used cooperatively with screw body away from the be hinged multiple expansion columns in external screw thread one end, with blind hole
And expansion column one end and side are provided with toroidal cavity push rod, are arranged on screw body away from externally threaded one end with expanding
Post quantity identical first through hole and connecting rod are opened, the connecting rod is through first through hole one end and expands column articulated, remote
The connecting rod that one end of expansion column is slidably connected with toroidal cavity.
In use, push rod is tightened by square so that push rod moves to the side of expansion column, works as pushrod movement
During to first through hole, connecting rod will be dropped into toroidal cavity, when connecting rod contacts with toroidal cavity, because push rod will
Moved to expansion column side so that connecting rod will move up, while the expansion column being hinged with connecting rod will move up,
The free end of expansion column with hole will contact and clamping.After use, by reversely twisting push rod, push rod will be to remote
The side movement of expansion column, connecting rod will drive expansion column to move down so that expansion column does not lie in hole clamping, can be effective
By expansion bolt from hole take out.
Further, in order to preferably realize the present invention, the blind hole is provided with internal thread close to externally threaded one end, institute
State push rod and the first external screw thread being used cooperatively with blind hole internal thread is set close to externally threaded one end.
Further, in order to preferably realize the present invention, the expansion column is provided with second close to the side of first through hole
Groove, the connecting rod are column articulated with expanding through the second groove.Second groove enables connecting rod close to one end of expansion column
Enough it is placed in the second groove.
Further, in order to preferably realize the present invention, the screw body is additionally provided with chi away from externally threaded side
The first groove that very little, position matches with expansion column, the expansion column are arranged in the first groove and are hinged with screw body.Set
First groove enables expansion column to be perfectly put into the first groove, when not in use so that expansion bolt storage is convenient.
The present invention compared with prior art, has advantages below and beneficial effect：
（1）The present invention is provided with push rod, connecting rod and expansion column, passes through being used cooperatively for push rod, connecting rod and expansion column
Expansion can be effectively realized, while after the completion of use, can take out and be reused.
（2）The present invention, which is provided with aftertaste spring, can realize the return of push rod automatically.
（3）The present invention is provided with the first groove, and expansion column can be placed in the first groove by the first groove so that
The design storage is simple.
（4）The present invention is simple in construction, practical.
Brief description of the drawings
Fig. 1 is the structural representation under use state of the present invention；
Fig. 2 is the structural representation for being provided with regulating bolt and push rod in the present invention in blind hole；
Fig. 3 is the structural representation for being provided only with push rod in the present invention in blind hole；
Fig. 4 is the structural representation under unused state of the present invention
Wherein 1- blind holes, 2- screw bodies, 21- first through hole, the grooves of 22- first, 3- connecting rods, 4- expansion columns, 41-
Two grooves, 5- regulating bolts, 6- push rods, 61- toroidal cavities, 7- springs.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment 1：
The present embodiment does further optimization on the basis of above-described embodiment, as shown in Figure 1, Figure 2, Figure 4 shows, a kind of from expansion formula
Expansion bolt, including one end are provided with externally threaded screw rod, and the screw rod includes being provided with the screw rod master of blind hole 1 in the axial direction
Body 2, with screw body 2 away from external screw thread one end be hinged multiple expansion columns 4, matched with the size of blind hole 1 push rod 6, be arranged on
Screw body 2 is distinguished away from externally threaded one end with the quantity identical first through hole 21 of expansion column 4 and through first through hole 21
The be hinged connecting rod 3 with expansion column 4 and push rod 6；The blind hole 1 is additionally provided with close to 2 externally threaded side of screw body to be used for
The gripping mechanism that driving push rod 6 moves.
In use, push rod 6 is tightened by square so that push rod 6 moves to the side of expansion column 4, when push rod 6
When moving to first through hole 21, connecting rod 3 will be dropped into toroidal cavity 61, when connecting rod 3 contacts with toroidal cavity 61
When, because push rod 6 will carry out moving to the side of expansion column 4 so that connecting rod 3 will move up, while be hinged with connecting rod 3
Expansion column 4 will move up, and the free end of expansion column 4 with hole will contact and clamping.After use, by reversely twisting
Turn push rod 6, push rod 6 will move to the side away from expansion column 4, and connecting rod 3 will drive expansion column 4 to move down so that expansion
Post 4 does not lie in hole clamping, effectively can take out expansion bolt from hole.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 2：
The present embodiment does further optimization on the basis of above-described embodiment, as shown in Figure 1 and Figure 2, further, in order to
The present invention is preferably realized, the blind hole 1 sets female screw rod close to externally threaded one end；The gripping mechanism includes
The regulating bolt 5 used with the screw-internal thread fit of blind hole 1.The blind hole 1 is provided with spring 7 close to one end of expansion column 4.The bullet
Spring 7 is return spring 7.
The gripping mechanism can also be setting and screw-internal thread fit use and externally threaded catch bar, catch bar and push rod
6 are contacted close to externally threaded one end.
The spring 7 can be freely placed in blind hole 1 or push rod 6 connects.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 3：
It is a kind of that expansion formula expansion bolt, including one end are provided with externally threaded screw rod as shown in Fig. 1, Fig. 3, Fig. 4, it is described
Screw rod includes being provided with the screw body 2 of blind hole 1 in the axial direction, with screw body 2 away from be hinged multiple in external screw thread one end
Expansion column 4, it is used cooperatively with blind hole 1 and is provided with the push rod 6 of toroidal cavity 61 close to the one end of expansion column 4 and side, is arranged on
Screw body 2 is away from externally threaded one end and the quantity identical first through hole 21 of expansion column 4 and connecting rod 3, the connecting rod 3
The connection being slidably connected through one end of the one end of first through hole 21 and be hinged, the remote expansion column 4 of expansion column 4 with toroidal cavity 61
Bar 3.
It should be noted that by above-mentioned improvement, in use, push rod 6 is tightened by square so that push rod 6
Moved to the side of expansion column 4, when push rod 6 moves to first through hole 21, connecting rod 3 will be dropped into toroidal cavity 61,
When connecting rod 3 contacts with toroidal cavity 61, because push rod 6 will carry out moving to the side of expansion column 4 so that connecting rod 3 will
Move up, while the expansion column 4 being hinged with connecting rod 3 will move up, the free end of expansion column 4 will be contacted with hole
And clamping.After use, by reversely twisting push rod 6, push rod 6 will move to the side away from expansion column 4, and connecting rod 3 will
Expansion column 4 is driven to move down so that expansion column 4 does not lie in hole clamping, effectively can take out expansion bolt from hole.
The toroidal cavity 61 is circular arc close to one end of expansion column 4, when being taken out expansion bolt, connecting rod
3 pass through the face smoothing process of circular arc.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 4：
The present embodiment does further optimization on the basis of above-described embodiment, and as shown in Figure 3, Figure 4, the blind hole 1 is close
Externally threaded one end is provided with internal thread, and the push rod 6 sets what is used with the screw-internal thread fit of blind hole 1 close to externally threaded one end
First external screw thread.
It should be noted that by above-mentioned improvement, internal thread with first it is externally threaded be used cooperatively, realize that push rod 6 can
It is fixedly installed in blind hole 1, realizes long-time clamping of the expansion column 4 to aperture wall.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 5：
The present embodiment does further optimization on the basis of above-described embodiment, as shown in Figure 1, Figure 2, Figure 3, Figure 4, the expansion
Open post 4 and the side of first through hole 21 is provided with the second groove 41, the connecting rod 3 passes through the second groove 41 and expansion column 4
It is be hinged.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 6：
The present embodiment does further optimization on the basis of above-described embodiment, as shown in Figure 1, Figure 2, Figure 3, Figure 4, the spiral shell
Bar main body 2 is away from the first groove 22 that externally threaded side is additionally provided with size, position matches with expansion column 4, the expansion column 4
It is in the first groove 22 and be hinged with screw body 2.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 7：
The present embodiment does further optimization on the basis of above-described embodiment, as shown in Figure 1, Figure 2, Figure 4 shows, a kind of from expansion formula
Expansion bolt, including one end are provided with externally threaded screw rod, and the screw rod includes being provided with the screw rod master of blind hole 1 in the axial direction
Body 2, with screw body 2 away from external screw thread one end be hinged multiple expansion columns 4, matched with the size of blind hole 1 push rod 6, be arranged on
Screw body 2 is distinguished away from externally threaded one end with the quantity identical first through hole 21 of expansion column 4 and through first through hole 21
The be hinged connecting rod 3 with expansion column 4 and push rod 6；The blind hole 1 is additionally provided with close to 2 externally threaded side of screw body to be used for
The gripping mechanism that driving push rod 6 moves.
Further, in order to preferably realize the present invention, the blind hole 1 sets female close to externally threaded one end
Screw rod；The gripping mechanism includes the regulating bolt 5 used with the screw-internal thread fit of blind hole 1.
Further, in order to preferably realize the present invention, the spring 7 is return spring 7.
Further, in order to preferably realize the present invention, the blind hole 1 is provided with internal thread close to externally threaded one end,
The push rod 6 sets the first external screw thread used with the screw-internal thread fit of blind hole 1 close to externally threaded one end.
Further, in order to preferably realize the present invention, the expansion column 4 is provided with close to the side of first through hole 21
Two grooves, the connecting rod 3 are be hinged with expansion column 4 through the second groove.
Further, in order to preferably realize the present invention, the screw body 2 is additionally provided with chi away from externally threaded side
The first groove 22 that very little, position matches with expansion column 4, the expansion column 4 are arranged in the first groove 22 and cut with scissors with screw body 2
Connect.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 8：
The present embodiment does further optimization on the basis of above-described embodiment, a kind of from expansion formula as shown in Fig. 1, Fig. 3, Fig. 4
Expansion bolt, including one end are provided with externally threaded screw rod, and the screw rod includes being provided with the screw rod master of blind hole 1 in the axial direction
Body 2, the multiple expansion columns 4 being hinged with screw body 2 away from external screw thread one end and blind hole 1 are used cooperatively and close to expansion columns 4 one
Hold and side is provided with the push rod 6 of toroidal cavity 61, is arranged on screw body 2 away from externally threaded one end and the quantity of expansion column 4
Identical first through hole 21 and connecting rod 3, the connecting rod 3 is be hinged, remote with expansion column 4 through the one end of first through hole 21 to expand
The connecting rod 3 that one end of post 4 is slidably connected with toroidal cavity 61.
Further, in order to preferably realize the present invention, the blind hole 1 is provided with internal thread close to externally threaded one end,
The push rod 6 sets the first external screw thread used with the screw-internal thread fit of blind hole 1 close to externally threaded one end.
Further, in order to preferably realize the present invention, the expansion column 4 is provided with close to the side of first through hole 21
Two grooves, the connecting rod 3 are be hinged with expansion column 4 through the second groove.
Further, in order to preferably realize the present invention, the screw body 2 is additionally provided with chi away from externally threaded side
The first groove 22 that very little, position matches with expansion column 4, the expansion column 4 are arranged in the first groove 22 and cut with scissors with screw body 2
Connect.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
It is described above, be only presently preferred embodiments of the present invention, any formal limitation not done to the present invention, it is every according to
Any simply modification, the equivalent variations made according to the technical spirit of the present invention to above example, each fall within the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of be provided with externally threaded screw rod from expansion formula expansion bolt, including one end, it is characterised in that：The screw rod includes edge
Axis direction is provided with blind hole（1）Screw body（2）With screw body（2）The multiple expansions being hinged away from external screw thread one end
Post（4）With blind hole（1）The push rod of size matching（6）, be arranged on screw body（2）Away from externally threaded one end and expansion column（4）
Quantity identical first through hole（21）And through first through hole（21）Respectively with expansion column（4）And push rod（6）Be hinged connection
Bar（3）, the blind hole（1）Close to screw body（2）Externally threaded side is additionally provided with for driving push rod（6）Mobile clamping
Device.
It is 2. a kind of from expansion formula expansion bolt according to claim 1, it is characterised in that：The blind hole（1）Close to externally threaded
One end is provided with internal thread；The gripping mechanism includes and blind hole（1）The regulating bolt that screw-internal thread fit uses（5）.
It is 3. a kind of from expansion formula expansion bolt according to claim 1, it is characterised in that：The blind hole（1）Close to expansion column（4）
One end spring is installed（7）.
It is 4. a kind of from expansion formula expansion bolt according to claim 3, it is characterised in that：The spring（7）For return spring
（7）.
It is 5. described a kind of from expansion formula expansion bolt according to any one of claim 1-4, it is characterised in that：The expansion column（4）Lean on
Nearly first through hole（21）Side be provided with the second groove（41）, the connecting rod（3）Through the second groove（41）With expansion column
（4）It is be hinged.
It is 6. described a kind of from expansion formula expansion bolt according to any one of claim 1-4, it is characterised in that：The screw body（2）
Size, position and expansion column are additionally provided with away from externally threaded side（4）First groove of matching（22）, the expansion column（4）
Installed in the first groove（22）Interior and and screw body（2）It is be hinged.
7. a kind of be provided with externally threaded screw rod from expansion formula expansion bolt, including one end, it is characterised in that：The screw rod includes edge
Axis direction is provided with blind hole（1）Screw body（2）With screw body（2）The multiple expansions being hinged away from external screw thread one end
Post（4）With blind hole（1）It is used cooperatively and close to expansion column（4）One end and side is provided with toroidal cavity（61）Push rod（6）、
It is arranged on screw body（2）Away from externally threaded one end and expansion column（4）Quantity identical first through hole（21）And connecting rod
（3）, the connecting rod（3）Through first through hole（21）One end and expansion column（4）Be hinged, remote expansion column（4）One end and circle
Annular groove（61）The connecting rod being slidably connected（3）.
It is 8. a kind of from expansion formula expansion bolt according to claim 7, it is characterised in that：The blind hole（1）Close to externally threaded
One end is provided with internal thread, the push rod（6）Close to the setting of externally threaded one end and blind hole（1）Screw-internal thread fit use first
External screw thread.
It is 9. described a kind of from expansion formula expansion bolt according to any one of claim 7-8, it is characterised in that：The expansion column（4）Lean on
Nearly first through hole（21）Side be provided with the second groove（41）, the connecting rod（3）Through the second groove（41）With expansion column
（4）It is be hinged.
It is 10. described a kind of from expansion formula expansion bolt according to any one of claim 7-8, it is characterised in that：The screw body（2）
Size, position and expansion column are additionally provided with away from externally threaded side（4）First groove of matching（22）, the expansion column（4）
Installed in the first groove（22）Interior and and screw body（2）It is be hinged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720399958.1U CN206754089U (en) | 2017-04-17 | 2017-04-17 | It is a kind of to expand formula expansion bolt certainly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720399958.1U CN206754089U (en) | 2017-04-17 | 2017-04-17 | It is a kind of to expand formula expansion bolt certainly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206754089U true CN206754089U (en) | 2017-12-15 |
Family
ID=60612968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720399958.1U Expired - Fee Related CN206754089U (en) | 2017-04-17 | 2017-04-17 | It is a kind of to expand formula expansion bolt certainly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206754089U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884836A (en) * | 2017-04-17 | 2017-06-23 | 四川建筑职业技术学院 | It is a kind of to expand formula expansion bolt certainly |
| CN108843667A (en) * | 2018-07-09 | 2018-11-20 | 百益百利（福州）幕墙工程有限公司 | A kind of expansible anchor bolt |
| CN110524452A (en) * | 2019-07-26 | 2019-12-03 | 中国航空工业集团公司济南特种结构研究所 | A kind of enclosure space quickly positions tensioning mechanism |
| CN111271356A (en) * | 2020-03-16 | 2020-06-12 | 杨磊 | Reverse expansion bolt |
| CN111379775A (en) * | 2020-02-22 | 2020-07-07 | 襄阳永力通机械有限公司 | Fixed cover of round pin axle that structure is firm |
| CN111494901A (en) * | 2020-04-20 | 2020-08-07 | 山东交通学院 | Rock climbing safety auxiliary device |
| CN112343914A (en) * | 2019-03-04 | 2021-02-09 | 李吴军 | Self-locking screw suitable for blind hole implantation |
| CN113606232A (en) * | 2021-06-29 | 2021-11-05 | 中建七局建筑装饰工程有限公司 | Double-end expansion connecting part |
-
2017
- 2017-04-17 CN CN201720399958.1U patent/CN206754089U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884836A (en) * | 2017-04-17 | 2017-06-23 | 四川建筑职业技术学院 | It is a kind of to expand formula expansion bolt certainly |
| CN108843667A (en) * | 2018-07-09 | 2018-11-20 | 百益百利（福州）幕墙工程有限公司 | A kind of expansible anchor bolt |
| CN108843667B (en) * | 2018-07-09 | 2020-05-26 | 百益百利（福州）幕墙工程有限公司 | Novel expansion anchor bolt |
| CN112343914A (en) * | 2019-03-04 | 2021-02-09 | 李吴军 | Self-locking screw suitable for blind hole implantation |
| CN110524452A (en) * | 2019-07-26 | 2019-12-03 | 中国航空工业集团公司济南特种结构研究所 | A kind of enclosure space quickly positions tensioning mechanism |
| CN110524452B (en) * | 2019-07-26 | 2024-05-24 | 中国航空工业集团公司济南特种结构研究所 | Quick positioning and tensioning mechanism for enclosed space |
| CN111379775A (en) * | 2020-02-22 | 2020-07-07 | 襄阳永力通机械有限公司 | Fixed cover of round pin axle that structure is firm |
| CN111271356A (en) * | 2020-03-16 | 2020-06-12 | 杨磊 | Reverse expansion bolt |
| CN111271356B (en) * | 2020-03-16 | 2021-11-02 | 魏县富盈金属制品有限公司 | Reverse expansion bolt |
| CN111494901A (en) * | 2020-04-20 | 2020-08-07 | 山东交通学院 | Rock climbing safety auxiliary device |
| CN111494901B (en) * | 2020-04-20 | 2021-11-19 | 山东交通学院 | Rock climbing safety auxiliary device |
| CN113606232A (en) * | 2021-06-29 | 2021-11-05 | 中建七局建筑装饰工程有限公司 | Double-end expansion connecting part |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20171215 Termination date: 20210417 |