CN109623706A - Gas circuit elbow outer-hexagonal nut fastening tool and application method for small space - Google Patents
Gas circuit elbow outer-hexagonal nut fastening tool and application method for small space Download PDFInfo
- Publication number
- CN109623706A CN109623706A CN201811559217.0A CN201811559217A CN109623706A CN 109623706 A CN109623706 A CN 109623706A CN 201811559217 A CN201811559217 A CN 201811559217A CN 109623706 A CN109623706 A CN 109623706A
- Authority
- CN
- China
- Prior art keywords
- handle
- connecting rod
- hexagonal nut
- claw
- bending connecting
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/48—Spanners; Wrenches for special purposes
- B25B13/50—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes
Abstract
The invention discloses a kind of gas circuit elbow outer-hexagonal nut fastening tool and application method for small space, the fastening tool includes: claw, handle, bending connecting rod, and the claw and the handle are respectively welded in the both ends of the bending connecting rod.The claw and the handle are respectively welded in the both ends of the bending connecting rod.In use, the fastening tool is inserted into above the outer-hexagonal nut to be fastened, until the external hex nut of the handle then rotated and fastened the catch jacket of the tool on the outside of the outer-hexagonal nut to be fastened.The claw, handle and bending connecting rod (3) can have different size of sizes specification according to the specification of gas circuit elbow outer-hexagonal nut and the size of small space.For the present invention as the gas circuit elbow outer-hexagonal nut Special tightening tool for being used for small space, fastening is reliable, easy to operate, low in cost.
Description
Technical field
The present invention relates to a kind of gas circuit elbow outer-hexagonal nut fastening tools and application method for small space.
Background technique
In industrial circle, pneumatic element and precision equipment refrigerating and other occasions gas circuit are using very universal, in different gas circuits members
When air circuit connection between part, be often used gas path joint and be attached, gas path joint there are many structure type, have it is linear,
Also there is the curved of different angle, be applicable to various positions on various occasions and gas circuit is attached, used at air circuit connection
The included outer-hexagonal nut of gas path joint is fastened.
It can be convenient to use common outer-hexagonal when connecting gas circuit with gas path joint in the position that General Spatial is open and pull
Hand fastens the outer-hexagonal nut of gas path joint, but the gas such as extracted from the medium small space of deep hole in connection
Pipe, when being connected with gas circuit elbow, since aperture is narrow, the outer-hexagonal nut location of gas circuit elbow is sunk in hole, and use is general
Outer hexagonal spanner does not have operating space, can not set about, and for the outer-hexagonal nut of gas circuit elbow, it also has no idea using outer six
Angle ut socket is operated.Such case, it usually needs fastened by tools such as nipper pliers, even if in this way, due to
Clamping dynamics is inadequate, the problem of nut can not fasten in place often occurs, causes tracheae and the gas leakage of gas path joint junction, thus
Equipment is caused to influence the normal use of pneumatic equipment for unsaturated vapor, while high pressure gas leakage may also cause the hair of safety accident
It is raw, a kind of therefore, easy to use there is an urgent need to high reliablity, the low-cost gas circuit elbow outer-hexagonal for small space
Nut fastening tool.
Summary of the invention
In order to solve the above-mentioned technical problem, the invention proposes a kind of gas circuit elbow outer-hexagonal nuts for small space
Fastening tool, it is difficult to solve the gas circuit elbow outer-hexagonal nut fastening in small space, and can not be fastened to nipper plier
Position leads to gas leakage at air circuit connection, cause equipment can not normal use, while the problem of safety accident may occur.
In view of this, present invention provide the technical scheme that a kind of gas circuit elbow outer-hexagonal nut for small space
Fastening tool characterized by comprising claw, handle, further include bending connecting rod, and the claw and the handle are respectively welded
In the both ends of the bending connecting rod, the gas circuit elbow outer-hexagonal nut fastening tool of integral type is formed, the claw is U-shaped knot
Structure is made of two parallel straight sections and an arc section, and arc section is for connecting two straight sections, the center of arc section upper surface
Position is connect by welding manner with the lower end surface of bending connecting rod, the upper end of the position among the handle side and bending connecting rod
Face is welded to connect, and the bending connecting rod is S type structure, by two bendings that the upper semisection of bending connecting rod and lower semisection two is flat
Capable straightway connects, side of the upper semisection perpendicular to the handle and side middle position by upper surface and handle is welded
Connection；Lower semisection is welded to connect perpendicular to claw and by lower end surface and the arc section upper surface center of claw.
Another object of the present invention is to provide a kind of gas circuit elbow outer-hexagonal nut fastening tools for small space
Application method characterized by comprising
Fastening tool is inserted into above the outer-hexagonal nut to be fastened, until by the catch jacket of the tool will quilt
On the outside of the outer-hexagonal nut of fastening, then rotates the external hex nut of the handle and fastened；After turning an angle, lift
The fastening tool disengages outer-hexagonal nut, after rotating backward certain angle, covers again and carries out rotating on outer hex nut tightly
Gu then taking out the fastening tool until the outer-hexagonal nut is fastened completely；
The fastening tool includes: claw, and handle further includes bending connecting rod, and the claw and the handle are respectively welded
In the both ends of the bending connecting rod, the gas circuit elbow outer-hexagonal nut fastening tool of integral type is formed, the claw is U-shaped knot
Structure is made of two parallel straight sections and an arc section, and arc section is for connecting two straight sections, the center of arc section upper surface
Position is connect by welding manner with the lower end surface of bending connecting rod, the upper end of the position among the handle side and bending connecting rod
Face is welded to connect, and the bending connecting rod is S type structure, by two bendings that the upper semisection of bending connecting rod and lower semisection two is flat
Capable straightway connects, side of the upper semisection perpendicular to the handle and side middle position by upper surface and handle is welded
Connection；Lower semisection is welded to connect perpendicular to claw and by lower end surface and the arc section upper surface center of claw.
The invention has the advantages that:
It realizes simply, including claw, handle, further includes bending connecting rod.The claw and the handle are respectively welded in institute
The both ends for stating bending connecting rod form the gas circuit elbow outer-hexagonal nut fastening tool of integral type.It can be in small space to gas
Bend head outer-hexagonal nut carries out tightening operation, compared to using the tools such as nipper plier fastened it is more professional reliably, coupling mechanism force
Degree is big, avoid because fasten it is not in place caused by gas leakage cause equipment not to be available the problem of, and the safety accident that may occur.
The claw is fastened together formula structure by welding manner between handle and bending connecting rod, consolidate it is durable, meanwhile, the card
Pawl, handle and bending connecting rod can have different big according to the specification of gas circuit elbow outer-hexagonal nut and the size of small space
Small sizes specification.The present invention is as the gas circuit elbow outer-hexagonal nut Special tightening tool for being used for small space, fastening
Reliably, easy to operate, it is low in cost.
Detailed description of the invention
Fig. 1 is a kind of structure chart of gas circuit elbow outer-hexagonal nut fastening tool for small space of the invention；
Fig. 2 is the structure chart that a kind of gas circuit elbow outer-hexagonal nut of small space of the invention fastens；
Appended drawing reference signal
1. 4. outer-hexagonal nut of claw 2. handle, 3. bending connecting rod, 5. straight section
6. 7. upper semisection of arc section, 8. lower semisection
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments, is wanted according to following explanation and right
Book is sought, advantages and features of the invention will become apparent from.It should be noted that attached drawing is all made of very simplified form and is applicable in
Non-accurate ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
It should be noted that present invention spy is for multiple embodiments with further in order to clearly demonstrate the contents of the present invention
Illustrate different implementations of the invention, wherein multiple embodiment is enumeration and non-exhaustive.In addition, in order to illustrate
Succinctly, the content having been mentioned in preceding embodiment is often omitted in rear embodiment, therefore, unmentioned interior in rear embodiment
Appearance can accordingly refer to preceding embodiment.
Although the invention can modification in a variety of forms and replacement extend, also listed in specification some specific
Implement legend and is described in detail.It should be understood that the starting point of inventor is not that the invention is limited to illustrated spy
Determine embodiment, antithesis, the starting point of inventor is to protect in all spirit or scope given and defined by this rights statement
The improvement of progress, equivalent alterations and modifications.Same component number is likely to be used for all attached drawings to represent identical or class
As part.
Please refer to Fig. 1 to Fig. 2, a kind of gas circuit elbow outer-hexagonal nut fastening tool for small space of the invention,
It include: claw, handle further includes bending connecting rod, and the claw and the handle are respectively welded in the both ends of the bending connecting rod,
The gas circuit elbow outer-hexagonal nut fastening tool of integral type is formed, the claw is U-shaped structure, by two parallel straight sections and one
A arc section composition, arc section pass through welding manner and bending for connecting two straight sections, the center of arc section upper surface
The lower end surface of connecting rod connects, and the upper surface of position and bending connecting rod among the handle side is welded to connect, and the bending connects
Bar is S type structure, is connected the upper semisection of the bending connecting rod straightway parallel with lower semisection two by two bendings, on
Half section of side perpendicular to the handle and side middle position by upper surface and handle is welded to connect；Lower semisection is perpendicular to claw
And it is welded to connect by lower end surface and the arc section upper surface center of claw.
In one embodiment, the dislocation spacing of the bending connecting rod upper semisection and lower semisection, the claw snap into
Distance of the central axis of outer-hexagonal nut to claw arc section center.
In one embodiment, the spacing of two straight sections of claw is slightly larger than two opposite flanks of outer-hexagonal nut
Distance.
In one embodiment, the handle is cylindrical structure, the position and bending connecting rod among cylindrical sides
Upper surface is welded to connect.
In one embodiment, the handle length and singlehanded width are close.
In one embodiment, the upper semisection of the bending connecting rod perpendicular to handle cylindrical sides and pass through upper surface
It is welded to connect with the cylindrical sides middle position of handle.
In one embodiment, the claw, handle and bending connecting rod are steel material.
In one embodiment, pass through welded connecting between the claw, handle and bending connecting rod.
In one embodiment, the claw, handle and bending connecting rod according to the specification of gas circuit elbow outer-hexagonal nut, with
And the size of small space carries out the adjustment of dimensions.
The present invention also provides a kind of application method of gas circuit elbow outer-hexagonal nut fastening tool for small space, packets
It includes: fastening tool is inserted into above the outer-hexagonal nut to be fastened, until the catch jacket of the tool will fastened
Outer-hexagonal nut on the outside of, then rotate the external hex nut of the handle and fastened；After turning an angle, lift described
Fastening tool disengages outer-hexagonal nut, after rotating backward certain angle, covers again and carries out rotation fastening on outer hex nut, directly
The outer-hexagonal nut is fastened completely extremely, then takes out the fastening tool；The fastening tool includes: claw, and handle further includes
The gas circuit elbow that integral type is formed in the both ends of the bending connecting rod is respectively welded in bending connecting rod, the claw and the handle
Outer-hexagonal nut fastening tool, the claw are U-shaped structure, are made of two parallel straight sections and an arc section, arc section
For connecting two straight sections, the center of arc section upper surface is connect by welding manner with the lower end surface of bending connecting rod, institute
The upper surface for stating position and bending connecting rod among handle side is welded to connect, and the bending connecting rod is S type structure, passes through two
Bending connects the upper semisection of the bending connecting rod straightway parallel with lower semisection two, side of the upper semisection perpendicular to handle
And it is welded to connect by upper surface and the side middle position of handle；Lower semisection is perpendicular to claw and passes through lower end surface and claw
Arc section upper surface center is welded to connect.
As specific embodiment, a kind of gas circuit elbow outer-hexagonal nut for small space of the invention fastens work
Tool, comprising: claw, handle further include bending connecting rod.The claw and the handle are respectively welded two in the bending connecting rod
End, forms the gas circuit elbow outer-hexagonal nut fastening tool of integral type.
In one embodiment, the claw is U-shaped structure, is made of two parallel straight sections and an arc section, two
The spacing of a straight section guarantees that claw can smoothly be covered in outer-hexagonal slightly larger than the distance of two opposite flanks of outer-hexagonal nut
The outside of nut and the rotation that can limit outer-hexagonal nut, arc section is for connecting two straight sections, in arc section upper surface
Heart position is connect by welding manner with the lower end surface of bending connecting rod.
In one embodiment, the handle is cylindrical structure, and diameter is thicker, is comfortably advisable with singlehanded grip feeling, length
Approaching with singlehanded width is advisable.The upper surface of position and bending connecting rod among cylindrical sides is welded to connect.
In one embodiment, the bending connecting rod is S type structure, by two bendings by the upper semisection of bending connecting rod and
Two parallel straightways of lower semisection connect, upper semisection perpendicular to handle cylindrical sides and pass through upper surface and handle
Cylindrical sides middle position be welded to connect；Lower semisection is perpendicular to claw and passes through the arc section upper surface of lower end surface and claw
Center is welded to connect.The dislocation spacing of bending connecting rod upper semisection and lower semisection, the outer-hexagonal nut snapped into for the claw
Central axis to the distance at claw arc section center, can guarantee the fastening tool in this way in use, the handle and institute
The upper semisection for stating bending connecting rod is rotated coaxially with the outer-hexagonal nut fastened always, facilitates operation and use.
In one embodiment, the claw, handle and bending connecting rod are steel material.
In one embodiment, pass through welded connecting between the claw, handle and bending connecting rod.
In one embodiment, the claw, handle and bending connecting rod according to the specification of gas circuit elbow outer-hexagonal nut, with
And the size of small space, there can be different size of sizes specification.
When the present embodiment is in use, the usage mode fastened in small space to gas circuit elbow outer-hexagonal nut is realized
The fastening tool to be inserted into above the outer-hexagonal nut to be fastened, until by the catch jacket of the tool will quilt
On the outside of the outer-hexagonal nut of fastening, then rotates the external hex nut of the handle and fastened；After turning an angle, lift
The fastening tool disengages outer-hexagonal nut, after rotating backward certain angle, covers again and carries out rotating on outer hex nut tightly
Gu then taking out the fastening tool until the outer-hexagonal nut is fastened completely.
In present embodiment, a kind of gas circuit elbow outer-hexagonal nut fastening tool for small space, such as Fig. 1 and Fig. 2
It is shown, comprising: claw 1, handle 2 further include bending connecting rod 3.The claw 1 and the handle 2 are respectively welded in the bending
The both ends of connecting rod 3 form the gas circuit elbow outer-hexagonal nut fastening tool of integral type.
In one embodiment, the claw 1 is U-shaped structure, is made of two parallel straight sections 5 and an arc section 6,
The spacing of two straight sections 5 guarantees that claw 1 can smoothly cover slightly larger than the distance of two opposite flanks of outer-hexagonal nut 4
The outside of outer-hexagonal nut 4 and the rotation that can limit outer-hexagonal nut 4, arc section 6 is for connecting two straight sections 5, arc section 6
The center of upper surface is connect by welding manner with the lower end surface of bending connecting rod 3.
In one embodiment, the handle 2 is cylindrical structure, and diameter is thicker, is comfortably advisable with singlehanded grip feeling, length
Approaching with singlehanded width is advisable.The upper surface of position and bending connecting rod 3 among cylindrical sides is welded to connect.
In one embodiment, the bending connecting rod 3 is S type structure, by two bendings by the upper semisection of bending connecting rod 3
7 straightways parallel with lower semisection 8 two connect, upper semisection 7 perpendicular to handle 2 cylindrical sides and pass through upper surface
It is welded to connect with the cylindrical sides middle position of handle 2；Lower semisection 8 is perpendicular to claw 1 and passes through the circle of lower end surface and claw 1
6 upper surface center of segmental arc is welded to connect.The dislocation spacing of bending connecting rod 3 upper semisection 7 and lower semisection 8 is blocked for the claw 1
The central axis of the outer-hexagonal nut 4 arrived can guarantee that the fastening tool makes to the distance at 1 arc section of claw, 6 center in this way
The upper semisection 7 of used time, the handle 1 and the bending connecting rod 3 is rotated coaxially with the outer-hexagonal nut 4 fastened always, convenient
Operation and use.
In one embodiment, the claw 1, handle 2 and bending connecting rod 3 are steel material.
In one embodiment, pass through welded connecting between the claw 1, handle 2 and bending connecting rod 3.
In one embodiment, the claw 1, handle 2 and bending connecting rod 3 are according to the rule of gas circuit elbow outer-hexagonal nut 4
The size of lattice and small space can have different size of sizes specification.
It realizes in the usage mode that small space fastens gas circuit elbow outer-hexagonal nut 4 and is, by the fastening work
Tool is inserted into above the outer-hexagonal nut 4 to be fastened, until by 1 set of claw of the tool in the outer-hexagonal spiral shell to be fastened
4 outside of mother, then rotates the external hex nut 4 of the handle 1 and is fastened；After turning an angle, the fastening work is lifted
Tool disengages outer-hexagonal nut 4, after rotating backward certain angle, covers again and carries out rotation fastening on outer hex nut 4, until will
The outer-hexagonal nut 4 fastens completely, then takes out the fastening tool.
The invention has the advantages that:
It realizes simply, including claw, handle, further includes bending connecting rod.The claw and the handle are respectively welded in institute
The both ends for stating bending connecting rod form the gas circuit elbow outer-hexagonal nut fastening tool of integral type.It can be in small space to gas
Bend head outer-hexagonal nut carries out tightening operation, compared to using the tools such as nipper plier fastened it is more professional reliably, coupling mechanism force
Degree is big, avoid because fasten it is not in place caused by gas leakage cause equipment not to be available the problem of, and the safety accident that may occur.
The claw is fastened together formula structure by welding manner between handle and bending connecting rod, consolidate it is durable, meanwhile, the card
Pawl, handle and bending connecting rod can have different big according to the specification of gas circuit elbow outer-hexagonal nut and the size of small space
Small sizes specification.The present invention is as the gas circuit elbow outer-hexagonal nut Special tightening tool for being used for small space, fastening
Reliably, easy to operate, it is low in cost.
Obviously, the above embodiments are merely examples for clarifying the description, rather than the restriction to embodiment.For
For person of an ordinary skill in the technical field, other various forms of variations can also be made on the basis of the above description
Or it changes.There is no necessity and possibility to exhaust all the enbodiments.And obvious variation extended from this
Or it changes and still falls among the protection scope of the invention.
Claims (10)
1. a kind of gas circuit elbow outer-hexagonal nut fastening tool for small space, comprising: claw, handle, which is characterized in that
It further include bending connecting rod, the claw and the handle are respectively welded in the both ends of the bending connecting rod, form the gas of integral type
Bend head outer-hexagonal nut fastening tool, the claw are U-shaped structure, are made of two parallel straight sections and an arc section,
Arc section is connected for connecting two straight sections, the center of arc section upper surface by the lower end surface of welding manner and bending connecting rod
It connects, the upper surface of the position among the handle side and bending connecting rod is welded to connect, and the bending connecting rod is S type structure, is led to
It crosses two bendings to connect the upper semisection of the bending connecting rod straightway parallel with lower semisection two, upper semisection is perpendicular to handle
Side and be welded to connect by the side middle position of upper surface and handle；Lower semisection perpendicular to claw and by lower end surface with
The arc section upper surface center of claw is welded to connect.
2. the gas circuit elbow outer-hexagonal nut fastening tool according to claim 1 for small space, which is characterized in that
The dislocation spacing of the bending connecting rod upper semisection and lower semisection, the central axis of the outer-hexagonal nut snapped into for the claw to card
The distance at pawl arc section center.
3. the gas circuit elbow outer-hexagonal nut fastening tool according to claim 1 for small space, which is characterized in that
Distance of the spacing of two straight sections of claw slightly larger than two opposite flanks of outer-hexagonal nut.
4. the gas circuit elbow outer-hexagonal nut fastening tool according to claim 1 for small space, which is characterized in that
The handle is cylindrical structure, and the upper surface of position and bending connecting rod among cylindrical sides is welded to connect.
5. the gas circuit elbow outer-hexagonal nut fastening tool according to claim 4 for small space, which is characterized in that
The handle length and singlehanded width are close.
6. the gas circuit elbow outer-hexagonal nut fastening tool according to claim 5 for small space, which is characterized in that
Among cylindrical sides of the upper semisection of the bending connecting rod perpendicular to handle and the cylindrical sides by upper surface and handle
Position is welded to connect.
7. the gas circuit elbow outer-hexagonal nut fastening tool according to claim 1 for small space, which is characterized in that
The claw, handle and bending connecting rod are steel material.
8. the gas circuit elbow outer-hexagonal nut fastening tool according to claim 1 for small space, which is characterized in that
Pass through welded connecting between the claw, handle and bending connecting rod.
9. the gas circuit elbow outer-hexagonal nut fastening tool according to claim 1 for small space, which is characterized in that
The claw, handle and bending connecting rod carry out ruler according to the specification of gas circuit elbow outer-hexagonal nut and the size of small space
The adjustment of very little specification.
10. a kind of application method of the gas circuit elbow outer-hexagonal nut fastening tool for small space, which is characterized in that packet
It includes:
Fastening tool is inserted into above the outer-hexagonal nut to be fastened, until the catch jacket of the tool will fastened
Outer-hexagonal nut on the outside of, then rotate the external hex nut of the handle and fastened；After rotating first angle, lift described
Fastening tool disengages outer-hexagonal nut, after rotating backward second angle, covers again and carries out rotation fastening on outer hex nut, directly
The outer-hexagonal nut is fastened completely extremely, then takes out the fastening tool；
The fastening tool includes: claw, and handle further includes bending connecting rod, and the claw and the handle are respectively welded in institute
The both ends for stating bending connecting rod form the gas circuit elbow outer-hexagonal nut fastening tool of integral type, and the claw is U-shaped structure, by
Two parallel straight sections and an arc section composition, arc section is for connecting two straight sections, the center of arc section upper surface
It is connect by welding manner with the lower end surface of bending connecting rod, the upper surface of the position among the handle side and bending connecting rod is welded
It connecing in succession, the bending connecting rod is S type structure, by two bendings that the upper semisection of bending connecting rod is parallel with lower semisection two
Straightway connects, side of the upper semisection perpendicular to the handle and side middle position by upper surface and handle is welded and connected
It connects；Lower semisection is welded to connect perpendicular to claw and by lower end surface and the arc section upper surface center of claw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811559217.0A CN109623706A (en) | 2018-12-18 | 2018-12-18 | Gas circuit elbow outer-hexagonal nut fastening tool and application method for small space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811559217.0A CN109623706A (en) | 2018-12-18 | 2018-12-18 | Gas circuit elbow outer-hexagonal nut fastening tool and application method for small space |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109623706A true CN109623706A (en) | 2019-04-16 |
Family
ID=66075586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811559217.0A Pending CN109623706A (en) | 2018-12-18 | 2018-12-18 | Gas circuit elbow outer-hexagonal nut fastening tool and application method for small space |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109623706A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659051A (en) * | 2020-11-25 | 2021-04-16 | 沪东中华造船(集团)有限公司 | Auxiliary device is dismantled in installation of fastener in boats and ships narrow and small space |
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|---|---|---|---|---|
| CN103302620A (en) * | 2013-06-21 | 2013-09-18 | 冯文杰 | Water pipe connector tightening set |
| US20150075334A1 (en) * | 2013-09-19 | 2015-03-19 | The Viking Corporation | Sprinkler Wrench Protective Cover |
| CN204248754U (en) * | 2014-11-02 | 2015-04-08 | 红塔烟草（集团）有限责任公司大理卷烟厂 | Dedusting room pulse valve gas-tpe fitting special spanner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112659051A (en) * | 2020-11-25 | 2021-04-16 | 沪东中华造船(集团)有限公司 | Auxiliary device is dismantled in installation of fastener in boats and ships narrow and small space |
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Application publication date: 20190416 |
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| WD01 | Invention patent application deemed withdrawn after publication |