CN104033468A - Anti-dropping bolt - Google Patents
Anti-dropping bolt Download PDFInfo
- Publication number
- CN104033468A CN104033468A CN201410275803.8A CN201410275803A CN104033468A CN 104033468 A CN104033468 A CN 104033468A CN 201410275803 A CN201410275803 A CN 201410275803A CN 104033468 A CN104033468 A CN 104033468A
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- China
- Prior art keywords
- hydraulic channel
- hydraulic
- hexagon head
- head end
- channel
- 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.)
- Granted
Links
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 14
- 238000001125 extrusion Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 21
- 230000000694 effects Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The invention discloses an anti-dropping bolt, and belongs to the technical field of fasteners. The anti-dropping bolt comprises a threaded extending portion and a hexagonal head which are sequentially arranged. A first hydraulic channel is arranged at the hexagonal head, a first plunger is arranged in the first hydraulic channel and extends out of the hexagonal head, the threaded extending portion is provided with a second hydraulic channel, the second hydraulic channel extends to the hexagonal head and is communicated with the first hydraulic channel via a connecting channel, an open slot which radially extends along the threaded extending portion is formed in the end, which is far away from the hexagonal head, of the threaded extending portion, an end of the second hydraulic channel is communicated with the open slot, a second plunger is arranged in the second hydraulic channel and is positioned at an end of the open slot, and the second hydraulic channel, the connecting channel and the first hydraulic channel which are positioned between the first plunger and the second plunger are filled with hydraulic oil; a one-way structure is arranged in the connecting channel, and the hydraulic oil can flow from the first hydraulic channel to the second hydraulic channel in a single direction under the effect of the one-way structure. The anti-dropping bolt has the advantages of stable performance and good anti-dropping effect.
Description
Technical field
The present invention relates to bolt, especially relate to a kind of Anti-extrusion bolt, belong to technical field of fastening.
Background technique
In mechanical manufacturing field, prevent that the common method of bolt looseness from having three kinds: rub locking, mechanical locking and forever locking.
Wherein, the locking and friction of machinery is locking be called detachably locking, and permanent locking be called non-dismountable locking.Conventional permanent lockingly have: spot welding, riveted joint, bonding etc., and this method mostly will be destroyed threaded fastener in the time dismantling, and cannot reuse; Common friction is locking to be had: utilize pad, self-locking nut and double nut etc.; Common mechanical anti-loose method utilizes cotter pin, locked spacer and string wire rope etc.In these anti-loose methods, machinery is locking with its reliable performance, easy to use and be widely used.
But in some occasion and situation, these anti-loose methods are all inapplicable.For example, when bolt is directly screwed in tapped hole while using as screw, mechanical anti-loose method cannot use, and permanent anti-loose method cannot be dismantled, and can only use friction locking.But in these three kinds of anti-loose methods, to rub, locking stability is the poorest.Therefore,, at some important position or specific position, need to consider a kind of new screw retention mode.
For the foregoing reasons and the state of the art, for a kind of new Anti-extrusion bolt of exploitation, not only there is urgent researching value, also there are good economic benefit and commercial Application potentiality, also be at present one of the study hotspot in this field and emphasis, and lean on this power place that the present invention is accomplished just and basis.
Summary of the invention
In order to overcome the defect of above-mentioned pointed existing Anti-extrusion bolt, the inventor conducts in-depth research this, is paying after a large amount of creative works, thereby is completing the present invention.
Particularly, technical problem to be solved by this invention is: a kind of Anti-extrusion bolt is provided, and the stable performance of described Anti-extrusion bolt, Anti-extrusion are effective, have a good application prospect and industrialization potentiality.
For solving the problems of the technologies described above, technological scheme of the present invention is: a kind of Anti-extrusion bolt is provided, described Anti-extrusion bolt comprises the outer-hexagonal body of bolt, the described outer-hexagonal body of bolt has the screw thread extension part and the hexagon head end that set gradually, described hexagon head end is provided with axially extended the first hydraulic channel along described hexagon head end, described the first hydraulic channel is positioned at a side of described screw thread extension part, the end that is positioned at described screw thread extension part one side in described the first hydraulic channel is provided with the first plunger, described the first plunger stretches out described hexagon head end, described screw thread extension part is provided with axially extended the second hydraulic channel along described screw thread extension part, described the second hydraulic channel extends to described hexagon head end and is communicated with described the first hydraulic channel by connecting passage, described connecting passage is positioned at described hexagon head end and the radially extension along described hexagon head end, described screw thread extension part is provided with an opening slot radially extending along described screw thread extension part away from one end of described hexagon head end, described opening slot is near the 3rd screw position, the end of described the second hydraulic channel is communicated with described opening slot, the one end that is positioned at described opening slot in described the second hydraulic channel is provided with the second plunger, the second hydraulic channel between described the second plunger and the first plunger, in connecting passage and the first hydraulic channel, be filled with hydraulic oil, in described connecting passage, be provided with and make the check configuration of hydraulic oil by the second hydraulic channel described in described the first hydraulic channel single flow direction.
In described Anti-extrusion bolt of the present invention, improve as one, described check configuration comprises a sealing cone, the small end of described sealing cone connects described the first hydraulic channel, the large end of described sealing cone connects described the second hydraulic channel, is provided with a ball sealer and for described ball sealer is relied on to the Compress Spring on described sealing cone with the large end of described sealing cone in the connecting passage being connected.
In described Anti-extrusion bolt of the present invention, as further improvement, in described connecting passage, be provided with a core cylinder, described core cylinder comprises core cylinder body, described core cylinder body one end leans described Compress Spring, the other end leans described hexagon head end, described core cylinder body has a hollow channel, the outer surface circular array of described core cylinder body is shown some support wing plates, the external diameter of described support wing plate and the internal diameter of described connecting passage are suitable, between two adjacent described support wing plates, are equipped with some through holes that run through described core cylinder body.
In described Anti-extrusion bolt of the present invention, the sectional area of described the first hydraulic channel can be greater than, be less than or equal to the sectional area of described the second hydraulic channel.
In described Anti-extrusion bolt of the present invention, as further improvement, the sectional area of described the first hydraulic channel is less than the sectional area of described the second hydraulic channel.
Adopt after technique scheme, the invention has the beneficial effects as follows:
1, owing to having designed the first plunger and the second plunger, and the second plunger leans on opening slot, the pretightening force of bolt is converted into the power of backing down of opening slot, opening slot is deformed, effectively prevent deviating from of bolt, and in connecting passage, designed check configuration, make opening slot not can because of the first plunger pretightening force reduce reset, therefore make the anticreep of this bolt stable and reliable for performance.
2, owing to having used core cylinder, thereby shorten the length of Compress Spring, avoided Compress Spring to cause leaning the insecure defect of ball sealer because length is long, further promoted the anticreep performance of this bolt.
As mentioned above, the invention provides a kind of Anti-extrusion bolt, its have be connected firmly, the plurality of advantages such as stable performance, there is good industrial applications potentiality and researching value.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the structural representation of embodiment of the present invention SMIS cylinder;
Wherein, in Fig. 1 and Fig. 2, from start to finish, unless otherwise prescribed, each number designation refers to respectively following concrete meaning, element and/or parts.
In figure: 1, screw thread extension part, 2, hexagon head end, 3, the first hydraulic channel, 4, the second hydraulic channel, 5, connecting passage, 6, the first plunger, 7, the second plunger, 8, opening slot, 9, ball sealer, 10, Compress Spring, 11, core cylinder, 1101, core cylinder body, 1102, hollow channel, 1103, support wing plate, 1104, through hole, 1105, projection, 12, unloading valve, 13, double-screw bolt.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.But the purposes of these exemplary mode of executions and object are only used for exemplifying the present invention, not real protection scope of the present invention is formed to any type of any restriction, more non-protection scope of the present invention is confined to this.
As shown in Figure 1, a kind of Anti-extrusion bolt provided by the present invention, described Anti-extrusion bolt mainly comprises the outer-hexagonal body of bolt, the outer-hexagonal body of bolt has the screw thread extension part 1 and the hexagon head end 2 that set gradually, hexagon head end 2 is provided with axially extended the first hydraulic channel 3 along hexagon head end 2, the first hydraulic channel 3 is positioned at a side of screw thread extension part 1, the end that is positioned at screw thread extension part 1 one sides in the first hydraulic channel 3 is provided with the first plunger 6, the first plunger 6 stretches out hexagon head end 2, screw thread extension part 1 is provided with axially extended the second hydraulic channel 4 along screw thread extension part 1, the second hydraulic channel 4 extends to hexagon head end 2 and is communicated with the first hydraulic channel 3 by connecting passage 5, connecting passage 5 is positioned at hexagon head end 2 and the radially extension along hexagon head end 2, screw thread extension part 1 is provided with an opening slot 8 radially extending along screw thread extension part 1 away from one end of hexagon head end 2, opening slot 8 is near the 3rd screw position, the end open communication groove 8 of the second hydraulic channel 4, the degree of depth of opening slot 8 plays by ear, in the time that the second hydraulic channel 4 is positioned at central position, the bottom land of opening slot 8 will be crossed the second hydraulic channel 4 certain distances, and to ensure intensity and the rigidity between first three screw thread and threaded joints, the one end that is positioned at opening slot 8 in the second hydraulic channel 4 is provided with the second plunger 7, the second hydraulic channel 4 between the second plunger 7 and the first plunger 6, in connecting passage 5 and the first hydraulic channel 3, be filled with hydraulic oil, in connecting passage 5, be provided with and make the check configuration of hydraulic oil by first hydraulic channel 3 single flow direction the second hydraulic channels 4, the second hydraulic channel 4 extends to the end face of hexagon head end 2, and connect a unloading valve 1106 in the end of the second hydraulic channel 4, unloading valve 1106 is threaded with hexagon head end 2, in the time that needs bolt is deviate from, can open unloading valve 1106, emit hydraulic oil, the second plunger 7 just resets under opening slot 8 tension force effects, bolt just can be deviate from, the design of unloading valve 1106, makes this bolt can Reusability, in the time of processing the second hydraulic channel 4, the directly centre-drilling hole from hexagon head end 2 along screw thread extension part 1, the through opening slot of hole depth 8 positions.The sectional area of the first hydraulic channel 3 is less than the sectional area of the second hydraulic channel 4, can increase the pressure that ejects of the second plunger 7.
Check configuration can be selected the one-way valve that some volumes are little, but the restriction due to installing space and mounting point in this position, more difficult realization, therefore, inventor, through research, finds a kind of check configuration that is applicable to this product.Check configuration comprises a sealing cone, the small end of sealing cone connects the first hydraulic channel 3, the large end of sealing cone connects the second hydraulic channel 4, when processing connecting passage 5, hole to another limit by the center line of hexagon head end 2 in a limit along hexagon head end 2, connecting passage 5 and the second hydraulic channel 4 are intersected, the connecting passage 5 that this radially extends can bore, then a side that connects the second hydraulic channel 4 re-uses the reaming of large size drill bit, form sealing cone, again by the two ends shutoff of connecting passage 5, when shutoff, can use rivet, also can use the double-screw bolt 13 being threaded with hexagon head end 2, use double-screw bolt 13 for optimal selection, can supplement or emit at any time hydraulic oil, stretch out the length of hexagon head end 2 planes to adjust the first plunger 6, but, rivet or double-screw bolt 13 all can not protrude the hexaplanar of hexagon head end 2, in the connecting passage 5 being connected with the large end of sealing cone, be provided with a ball sealer 9 and for ball sealer 9 being relied on to the Compress Spring 10 on sealing cone, ball sealer 9 can be selected steel ball common on market, but inventor thinks, ball sealer 9 ball that more preferably nitrile rubber material is made, because contacting with sealing cone, steel ball forms linear sealing, and ball and the sealing of sealing cone forming surface, sealing effect is better.
In development process, inventor finds that the length of Compress Spring 10 is too large, easily deform in the longitudinal direction, all very unfavorable to the stability resetting and use, preferably the length of compresses spring 10 makes it be no more than the second hydraulic channel 4, now best results, therefore, as shown in Fig. 1 and Fig. 2 are common, in connecting passage 5, be provided with a core cylinder 11, core cylinder 11 comprises core cylinder body 1101, core cylinder body 1101 one end lean Compress Spring 10, the other end leans hexagon head end 2, core cylinder body 1101 has a hollow channel 1102, the outer surface circular array of core cylinder body 1101 is shown some support wing plates 1103, the thickness that supports wing plate 1103 is less than the diameter of the second hydraulic channel 4, can avoid supporting wing plate 1103 and stop up the second hydraulic channel 4, support the external diameter of wing plate 1103 and the internal diameter of connecting passage 5 suitable, between two adjacent braced wing plates 1103, be equipped with some through holes 1104 that run through core cylinder body 1101, ensure that hydraulic oil is smooth and easy mobile, core cylinder 11 can be made for plastic materials, with weight reduction with reduce costs.In when design, the design of more optimizing the projection 1105 of one annular, this projection 1105 is in the end of core cylinder body 1101, one end of Compress Spring 10 is sleeved in this projection 1105, has increased the stability of Compress Spring 10, not yielding.
When use, the first plunger 6 protrudes the plane of hexagon head end 2, the second plunger 7 is in leaning the side away from hexagon head end 2 at opening slot 8, when bolt connects after workpiece, fastening nut, the first plunger 6 is subject to impacting force and the hydraulic oil of exerting pressure, hydraulic oil flows into the second hydraulic channel 4 by the first hydraulic channel 3, the second plunger 7 is ejected, opening slot 8 change width strut the end of screw thread extension part 1, can not cause bolt to be deviate from even if nut is loosening, greatly improve the usage safety performance of bolt yet.In the time that needs bolt is deviate from, open unloading valve 1106, emit hydraulic oil, the second plunger 7 just resets under opening slot 8 tension force effects, and bolt just can be deviate from.
Described bolt good anti-drop effect of the present invention, stable performance, can Reusability, greatly reduces the user cost of bolt, have good industrial value and potentiality, and user cost is low.
The purposes that should be appreciated that these embodiments only limits the scope of the invention for the present invention being described but not being intended to.In addition; also should understand; after having read technology contents of the present invention, those skilled in the art can make various changes, amendment and/or modification to the present invention, within these all equivalent form of values fall within the protection domain that the application's appended claims limits equally.
Claims (5)
1. an Anti-extrusion bolt, it comprises the outer-hexagonal body of bolt, the described outer-hexagonal body of bolt has the screw thread extension part and the hexagon head end that set gradually, it is characterized in that: described hexagon head end is provided with axially extended the first hydraulic channel along described hexagon head end, described the first hydraulic channel is positioned at a side of described screw thread extension part, the end that is positioned at described screw thread extension part one side in described the first hydraulic channel is provided with the first plunger, described the first plunger stretches out described hexagon head end, described screw thread extension part is provided with axially extended the second hydraulic channel along described screw thread extension part, described the second hydraulic channel extends to described hexagon head end and is communicated with described the first hydraulic channel by connecting passage, described connecting passage is positioned at described hexagon head end and the radially extension along described hexagon head end, described screw thread extension part is provided with an opening slot radially extending along described screw thread extension part away from one end of described hexagon head end, described opening slot is near the 3rd screw position, the end of described the second hydraulic channel is communicated with described opening slot, the one end that is positioned at described opening slot in described the second hydraulic channel is provided with the second plunger, the second hydraulic channel between described the second plunger and the first plunger, in connecting passage and the first hydraulic channel, be filled with hydraulic oil, in described connecting passage, be provided with and make the check configuration of hydraulic oil by the second hydraulic channel described in described the first hydraulic channel single flow direction.
2. Anti-extrusion bolt as claimed in claim 1, it is characterized in that: described check configuration comprises a sealing cone, the small end of described sealing cone connects described the first hydraulic channel, the large end of described sealing cone connects described the second hydraulic channel, is provided with a ball sealer and for described ball sealer is relied on to the Compress Spring on described sealing cone with the large end of described sealing cone in the connecting passage being connected.
3. Anti-extrusion bolt as claimed in claim 1 or 2, it is characterized in that: in described connecting passage, be provided with a core cylinder, described core cylinder comprises core cylinder body, described core cylinder body one end leans described Compress Spring, the other end leans described hexagon head end, described core cylinder body has a hollow channel, the outer surface circular array of described core cylinder body is shown some support wing plates, the external diameter of described support wing plate and the internal diameter of described connecting passage are suitable, between two adjacent described support wing plates, are equipped with some through holes that run through described core cylinder body.
4. the Anti-extrusion bolt as described in claim 1-3, is characterized in that: the sectional area of described the first hydraulic channel is greater than, is less than or equal to the sectional area of described the second hydraulic channel.
5. Anti-extrusion bolt as claimed in claim 4, is characterized in that: the sectional area of described the first hydraulic channel is less than the sectional area of described the second hydraulic channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410275803.8A CN104033468B (en) | 2014-06-19 | 2014-06-19 | A kind of Anti-extrusion bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410275803.8A CN104033468B (en) | 2014-06-19 | 2014-06-19 | A kind of Anti-extrusion bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104033468A true CN104033468A (en) | 2014-09-10 |
| CN104033468B CN104033468B (en) | 2015-12-02 |
Family
ID=51464393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410275803.8A Active CN104033468B (en) | 2014-06-19 | 2014-06-19 | A kind of Anti-extrusion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104033468B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679069A (en) * | 2018-05-08 | 2018-10-19 | 中国建筑第八工程局有限公司 | Anti-drop bolt and anti-drop bolt component and its application method |
| CN111677742A (en) * | 2020-06-19 | 2020-09-18 | 常德市中天精密工具有限公司 | Hydraulic expansion locking bolt |
| CN112278136A (en) * | 2020-11-17 | 2021-01-29 | 上海凤凰自行车江苏有限公司 | Damping device for bicycle frame |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3515027A (en) * | 1968-07-15 | 1970-06-02 | Ralph Textrom | Torsion cam fastener |
| US3630261A (en) * | 1968-02-27 | 1971-12-28 | Rex Chainbelt Inc | Frictional antirotation device |
| WO1995030837A1 (en) * | 1994-05-04 | 1995-11-16 | Etablissements Sarran S.A. | Device for joining two elements |
| CN2303973Y (en) * | 1997-06-09 | 1999-01-13 | 袁岭 | Anti-loose anti-rust screw-bolt |
| CN2553167Y (en) * | 2002-07-04 | 2003-05-28 | 刘永祥 | Multifunctional bolt |
| DE102008050683A1 (en) * | 2008-10-07 | 2010-04-15 | Dirk Fervers | Positive safe construction for prevention of releasing screw- or nut connections, has main component with screw thread with pitch and safety component with another screw thread with another pitch |
| CN101784803A (en) * | 2007-05-25 | 2010-07-21 | 霍尔迪·马塔罗多纳·马丁内斯 | Safety screw |
| CN103541606A (en) * | 2012-07-09 | 2014-01-29 | 山西全安新技术开发有限公司 | Bi-guardian lock device used for locking screw and method for locking screw with lock device |
-
2014
- 2014-06-19 CN CN201410275803.8A patent/CN104033468B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3630261A (en) * | 1968-02-27 | 1971-12-28 | Rex Chainbelt Inc | Frictional antirotation device |
| US3515027A (en) * | 1968-07-15 | 1970-06-02 | Ralph Textrom | Torsion cam fastener |
| WO1995030837A1 (en) * | 1994-05-04 | 1995-11-16 | Etablissements Sarran S.A. | Device for joining two elements |
| CN2303973Y (en) * | 1997-06-09 | 1999-01-13 | 袁岭 | Anti-loose anti-rust screw-bolt |
| CN2553167Y (en) * | 2002-07-04 | 2003-05-28 | 刘永祥 | Multifunctional bolt |
| CN101784803A (en) * | 2007-05-25 | 2010-07-21 | 霍尔迪·马塔罗多纳·马丁内斯 | Safety screw |
| DE102008050683A1 (en) * | 2008-10-07 | 2010-04-15 | Dirk Fervers | Positive safe construction for prevention of releasing screw- or nut connections, has main component with screw thread with pitch and safety component with another screw thread with another pitch |
| CN103541606A (en) * | 2012-07-09 | 2014-01-29 | 山西全安新技术开发有限公司 | Bi-guardian lock device used for locking screw and method for locking screw with lock device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679069A (en) * | 2018-05-08 | 2018-10-19 | 中国建筑第八工程局有限公司 | Anti-drop bolt and anti-drop bolt component and its application method |
| CN111677742A (en) * | 2020-06-19 | 2020-09-18 | 常德市中天精密工具有限公司 | Hydraulic expansion locking bolt |
| CN112278136A (en) * | 2020-11-17 | 2021-01-29 | 上海凤凰自行车江苏有限公司 | Damping device for bicycle frame |
| CN112278136B (en) * | 2020-11-17 | 2021-12-10 | 上海凤凰自行车江苏有限公司 | Damping device for bicycle frame |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104033468B (en) | 2015-12-02 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
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Inventor after: Yu Xuan Inventor before: Sun Haoer |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171228 Address after: 300000 Tianjin city Jinnan district north gate town Jin Qi road is Zhiyuan No. 5 Building 1 No. 2403 Patentee after: Yu Xuan Address before: Hengxi town Yinzhou District new industrial park, 315131 Zhejiang city of Ningbo Province Patentee before: Ningbo Haobo Commerce Co., Ltd. |
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Effective date of registration: 20190425 Address after: 410116 Room 406, Building 10, Phase IV, 188 Environmental Protection Middle Road, Yuhua District, Changsha City, Hunan Province Patentee after: Hunan Shenyi Hardware Standard Parts Co., Ltd. Address before: 300 000 Jinnan District, Tianjin City, No. 1 Gate 2403, No. 5 Building, Jinqi Highway, Beizhakou Town, Tianjin Patentee before: Yu Xuan |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 410116 Room 406, Building 10, Phase IV, 188 Environmental Protection Middle Road, Yuhua District, Changsha City, Hunan Province Patentee after: Hunan Shenyi precision parts Co.,Ltd. Address before: 410116 Room 406, Building 10, Phase IV, 188 Environmental Protection Middle Road, Yuhua District, Changsha City, Hunan Province Patentee before: Hunan Shenyi Hardware Standard Parts Co.,Ltd. |