CN112412948A - Fastening bolt with adjustable screw pitch - Google Patents
Fastening bolt with adjustable screw pitch Download PDFInfo
- Publication number
- CN112412948A CN112412948A CN202011302673.4A CN202011302673A CN112412948A CN 112412948 A CN112412948 A CN 112412948A CN 202011302673 A CN202011302673 A CN 202011302673A CN 112412948 A CN112412948 A CN 112412948A
- Authority
- CN
- China
- Prior art keywords
- internal
- fastening bolt
- arc
- external
- fixed
- 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.)
- Withdrawn
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 230000001276 controlling effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 210000003781 tooth socket Anatomy 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention relates to the technical field of hardware fasteners, in particular to a fastening bolt with adjustable thread pitch. According to the fastening bolt with the adjustable thread pitch, the arc-shaped external expansion plate controlled by the internal telescopic rod and the external thread adjusting rod is arranged on the outer side of the fixed threaded pipe, and the external diameter and the length of the thread of the bolt can be changed as required by using the arc-shaped external expansion plate, so that the application range of the fastening bolt is wider; set up the side direction upset of built-in inside upset regulation pole on fixed screwed pipe lateral surface and adjust the mouth, the assembly ring on regulation pole top is adjusted through inside upset and the annular transmission tooth's socket on its surface meshes with the transmission rack on the inside telescopic link when making things convenient for its movable assembly mutually, controls the upset of inside upset regulation pole through the flexible translation of inside telescopic link, and control easy operation is convenient, and the structure after adjusting simultaneously is more stable firm.
Description
Technical Field
The invention relates to the technical field of hardware fasteners, in particular to a fastening bolt with adjustable thread pitch.
Background
A bolt is a mechanical part, and a cylindrical threaded fastener matched with a nut. A fastener consisting of a head part and a screw (a cylinder with external threads) needs to be matched with a nut and is used for fastening and connecting two parts with through holes. This form of connection is known as a bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so that the bolt connection belongs to detachable connection.
Traditional bolt structure is fixed singly, can't adjust bolt's length and specification as required, leads to its application scope relatively singlely.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problems existing in the background technology, an improved fastening bolt with adjustable thread pitch is provided, and the problem that the conventional bolt structure is single in fixation, and the length and specification of the bolt cannot be adjusted as required, so that the application range of the bolt is single is solved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a fastening bolt with adjustable thread pitch comprises a fixed threaded pipe and a bolt head welded at the top end of the outer side of the fixed threaded pipe, wherein an arc-shaped external expansion plate is arranged on the outer side surface of the fixed threaded pipe, a lateral overturning adjusting port with an opening at one side is formed in the outer side surface of the fixed threaded pipe, an integral structure movable mounting frame protruding inwards is fixed on the inner side of the lateral overturning adjusting port on the inner side of the fixed threaded pipe, the inner side of the fixed threaded pipe is movably connected with an internal overturning adjusting rod through the movable mounting frame, an integral structure internal mounting support protruding inwards the lateral overturning adjusting port is formed in the inner side surface of the arc-shaped external expansion plate, the arc-shaped external expansion plate is movably connected with the outer side end of the internal overturning adjusting rod through the internal mounting support, and an internal telescopic rod for controlling the internal overturning adjusting rod is inserted in the, the inner center of the bolt head is provided with an inner thread adjusting hole communicated with the fixed thread pipe, and an outer thread adjusting rod used for controlling the expansion of the inner telescopic rod is inserted into the inner thread adjusting hole in a threaded manner.
Inside upset adjust pole both ends have a body structure assembly ring, movable mounting bracket and internally mounted support medial surface on all have with assembly ring matched with a body structure assembly axle, inside upset adjust pole through the assembly ring cover of medial extremity epaxial and the swing mounting bracket medial surface swing joint of assembly, inside upset adjust pole through the assembly ring cover of lateral extremity epaxial and internally mounted support swing joint of assembly, the arc face in the outside of assembly ring on have annular transmission tooth's socket.
The inside telescopic link lateral surface on seted up with flexible mounting bracket matched with side guide way, side guide way medial surface on have with annular transmission tooth's socket matched with an organic whole structure driving rack, inside telescopic link insert annular transmission tooth's socket inside through driving rack and assemble the ring meshing transmission.
The outside extension inboard side of arc have the inside spacing support of L type structure, inside telescopic link keep away from external screw thread regulating lever end and offer the spacing draw-in groove of annular with inside spacing support matched with, inside telescopic link pass through the spacing draw-in groove of annular cover inboard and the outside fixed joint of extension board of arc at inside spacing support.
The external thread adjusting rod is characterized in that an integrated regular hexagon structure external control block protruding outwards is arranged at the center of the outer side face of the external thread adjusting rod, an external limiting sleeve is sleeved on the outer side face of the bolt head, and a regular hexagon structure internal limiting through hole matched with the external control block is formed in the internal part of the external limiting sleeve.
The arc-shaped external expansion plate is far away from the head end of the bolt and is provided with an integrated structure top limiting supporting plate.
The non-fixed connecting surface of the top limiting supporting plate is provided with an anti-skid meshed tooth surface.
The invention has the beneficial effects that:
(1) according to the fastening bolt with the adjustable thread pitch, the arc-shaped external expansion plate controlled by the internal telescopic rod and the external thread adjusting rod is arranged on the outer side of the fixed threaded pipe, and the external diameter and the length of the thread of the bolt can be changed as required by using the arc-shaped external expansion plate, so that the application range of the fastening bolt is wider;
(2) the lateral turning adjusting opening with the built-in internal turning adjusting rod is formed in the outer side surface of the fixed threaded pipe, the assembling ring at the top end of the internal turning adjusting rod and the annular transmission tooth groove on the surface of the assembling ring are meshed with the transmission rack on the internal telescopic rod while the assembling ring is convenient to movably assemble, the internal turning adjusting rod is controlled to turn through telescopic translation of the internal telescopic rod, the control operation is simple and convenient, and the adjusted structure is more stable and firm;
(3) set up inside spacing support in the outside expansion board inboard of arc, utilize the spacing draw-in groove card of annular on inside telescopic link top to tighten up fixedly the outside expansion board of arc inside spacing support to promote structural stability and the firmness after the pitch is adjusted greatly.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an internal cross-sectional view of the present invention.
FIG. 3 is a partial schematic view of the mating end of the mounting ring of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
FIG. 1, FIG. 2 and FIG. 3 show a fastening bolt with adjustable thread pitch, which comprises a fixed threaded pipe 1 and a bolt head 2 welded on the top end of the outer side of the fixed threaded pipe 1, an arc-shaped external expanding plate 3 is arranged on the outer side surface of the fixed threaded pipe 1, a lateral overturn adjusting port 4 with an opening at one side is arranged on the outer side surface of the fixed threaded pipe 1, an inwardly-protruded integral structure movable mounting frame is fixed on the inner side of the lateral overturn adjusting port 4 on the inner side of the fixed threaded pipe 1, an internal overturn adjusting rod 5 is movably connected on the inner side of the fixed threaded pipe 1 through the movable mounting frame, an integral structure internal mounting bracket protruded into the lateral overturn adjusting port 4 is arranged on the inner side surface of the arc-shaped external expanding plate 3, the arc-shaped external expanding plate 3 is movably connected with the outer side end of the internal overturn adjusting rod 5 through the internal mounting bracket, an internal telescopic, an internal thread adjusting hole 7 communicated with the inside of the fixed threaded pipe 1 is formed in the center of the inside of the bolt head 2, and an external thread adjusting rod 8 used for controlling the expansion of the inner telescopic rod 6 is inserted into the internal thread adjusting hole 7 in a threaded manner.
Example (b): the internal telescopic rod 6 is driven to stretch and translate inside the fixed threaded pipe 1 by rotating the external thread adjusting rod 8, so that the internal turning adjusting rod 5 is driven to turn, the internal turning adjusting rod 5 drives the arc-shaped external expanding plate 3 to turn outside the fixed threaded pipe 1 by turning, and when the internal turning adjusting rod is turned to the outer side surface of the fixed threaded pipe 1, the diameter of an external thread is increased; when the fixed threaded pipe 1 is turned over, the length of the external thread is increased. The connecting ends of the internal overturning adjusting rod 5 and the arc-shaped external expansion plate 3 can be provided with reset elastic pieces as required, so that the elastic extrusion stability and the anti-seismic performance are improved.
Furthermore, in order to match movable assembly and transmission control, the two ends of the internal overturn adjusting rod 5 are provided with an integrated structure assembly ring 9, the inner side surfaces of the movable mounting frame and the internal mounting support are respectively provided with an integrated structure assembly shaft matched with the assembly ring 9, the internal overturn adjusting rod 5 is sleeved on the assembly shaft through the assembly ring 9 at the inner side end and is movably connected with the inner side surface of the movable mounting frame, the internal overturn adjusting rod 5 is sleeved on the assembly shaft through the assembly ring 9 at the outer side end and is movably connected with the internal mounting support, the outer arc surface of the assembly ring 9 is provided with an annular transmission tooth socket 10, furthermore, in order to improve the internal guidance, the stability and the transmission efficiency, the outer side surface of the internal telescopic rod 6 is provided with a side guide groove 11 matched with the movable mounting frame, and the inner side surface of the side guide groove 11 is provided with, the inner telescopic rod 6 is inserted into the annular transmission tooth groove 10 through the transmission rack 12 and is meshed with the assembling ring 9 for transmission.
Further, in order to promote the tightening force of near-end, thereby guarantee the structural stability of link, the 3 medial surfaces of the outside expansion board of arc have the inside spacing support 13 of L type structure, inside telescopic link 6 is kept away from external screw thread regulation pole 8 ends and is offered the spacing draw-in groove 14 of annular with inside spacing support 13 matched with, inside telescopic link 6 overlaps at the inside spacing support 13 inboard and the outside expansion board 3 fixed joint of arc through spacing draw-in groove 14 of annular, furthermore, for the convenience of external control is flexible, 8 lateral surfaces central point of external screw thread regulation pole puts and has outside bellied integrative regular hexagon structure external control block 15, outside stop collar 16 has been cup jointed on the 2 lateral surfaces of bolt head, outside stop collar 16 is inside to be seted up with the inside spacing through-hole 17 of outside control block 15 matched with regular.
Further, in order to improve the supporting force of the outer side end, the end, far away from the bolt head 2, of the arc-shaped outer expansion plate 3 is provided with an integral structure top limiting supporting plate 18, and further, in order to improve the lateral anti-skid property, an anti-skid meshing tooth surface is arranged on the non-fixed connecting surface of the top limiting supporting plate 18.
According to the fastening bolt with the adjustable thread pitch, the arc-shaped external expansion plate 3 controlled by the internal telescopic rod 6 and the external thread adjusting rod 8 is arranged on the outer side of the fixed threaded pipe 1, the external diameter and the length of the thread of the bolt can be changed according to needs by utilizing the arc-shaped external expansion plate 3, and the application range of the fastening bolt is wider; the lateral turning adjusting port 4 internally provided with the internal turning adjusting rod 5 is formed in the outer side surface of the fixed threaded pipe 1, the assembling ring 9 at the top end of the internal turning adjusting rod 5 and the annular transmission tooth groove 10 on the surface of the internal turning adjusting rod are meshed with the transmission rack 12 on the internal telescopic rod 6 while the internal turning adjusting rod 5 is convenient to movably assemble, the internal turning adjusting rod 5 is controlled to turn through the telescopic translation of the internal telescopic rod 6, the control operation is simple and convenient, and the adjusted structure is more stable and firm; set up inside spacing support 13 in the outside expansion plate 3 inboard of arc, utilize the spacing draw-in groove 14 card of annular on 6 tops of inside telescopic link to tighten up fixedly the outside expansion plate 3 of arc inside spacing support 13 to promote structural stability and the firmness after the pitch is adjusted greatly.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides a fastening bolt with adjustable pitch, includes fixed screwed pipe (1) and welds bolt head (2) at fixed screwed pipe (1) outside top, characterized by: the outer side surface of the fixed threaded pipe (1) is provided with an arc-shaped external expansion plate (3), the outer side surface of the fixed threaded pipe (1) is provided with a lateral overturning adjusting port (4) with an opening on one side, the inner side surface of the fixed threaded pipe (1) is positioned at the lateral overturning adjusting port (4), the inner side of the fixed threaded pipe (1) is fixed with an integral structure movable mounting frame which protrudes inwards, the inner side of the fixed threaded pipe (1) is movably connected with an internal overturning adjusting rod (5) through the movable mounting frame, the inner side surface of the arc-shaped external expansion plate (3) is provided with an integral structure internal mounting bracket which protrudes inwards towards the lateral overturning adjusting port (4), the arc-shaped external expansion plate (3) is movably connected with the outer side end of the internal overturning adjusting rod (5) through the internal mounting bracket, and the internal telescopic rod (6) for controlling the internal overturning adjusting rod (5) is inserted into, the bolt head (2) inside central point put and seted up internal thread regulation hole (7) with fixed screwed pipe (1) internal intercommunication, internal thread regulation hole (7) inside screw thread peg graft and have and be used for controlling flexible external screw thread regulation pole (8) of inside telescopic link (6).
2. A fastening bolt with adjustable pitch as defined in claim 1, wherein: inside upset adjust pole (5) both ends have a body structure fitting ring (9), movable mounting bracket and internally mounted support medial surface on all have with fitting ring (9) matched with a body structure fitting shaft, inside upset adjust pole (5) through fitting ring (9) cover of medial extremity at the epaxial and movable mounting bracket medial surface swing joint of assembly, inside upset adjust pole (5) through fitting ring (9) cover of outside end at the epaxial and internally mounted support swing joint of assembly, fitting ring (9) outside arcwall face on have annular transmission tooth's socket (10).
3. A fastening bolt with adjustable pitch as defined in claim 2, wherein: inside telescopic link (6) lateral surface on seted up with flexible mounting bracket matched with side guide way (11), side guide way (11) medial surface on have with annular transmission tooth's socket (10) matched with an organic whole structure transmission rack (12), inside telescopic link (6) insert annular transmission tooth's socket (10) inside and assembly ring (9) meshing transmission through transmission rack (12).
4. A fastening bolt with adjustable pitch as defined in claim 1, wherein: the outside expansion board of arc (3) medial surface inside has L type structure spacing support (13), inside telescopic link (6) keep away from external screw thread regulation pole (8) end and offer with inside spacing support (13) matched with annular spacing draw-in groove (14), inside telescopic link (6) through annular spacing draw-in groove (14) cover at inside spacing support (13) inboard and outside expansion board of arc (3) fixed joint.
5. A fastening bolt with adjustable pitch as defined in claim 1, wherein: the external thread adjusting rod (8) is characterized in that an integrated regular hexagon structure external control block (15) protruding outwards is arranged at the center of the outer side face of the external thread adjusting rod (8), an external limiting sleeve (16) is sleeved on the outer side face of the bolt head (2), and a regular hexagon structure internal limiting through hole (17) matched with the external control block (15) is formed in the external limiting sleeve (16).
6. A fastening bolt with adjustable pitch as defined in claim 1, wherein: the end, far away from the bolt head (2), of the arc-shaped external expansion plate (3) is provided with an integral structure top limiting support plate (18).
7. A fastening bolt with adjustable pitch as defined in claim 6, wherein: the non-fixed connecting surface of the top limiting supporting plate (18) is provided with an anti-skid engaging tooth surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011302673.4A CN112412948A (en) | 2020-11-19 | 2020-11-19 | Fastening bolt with adjustable screw pitch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011302673.4A CN112412948A (en) | 2020-11-19 | 2020-11-19 | Fastening bolt with adjustable screw pitch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112412948A true CN112412948A (en) | 2021-02-26 |
Family
ID=74773629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011302673.4A Withdrawn CN112412948A (en) | 2020-11-19 | 2020-11-19 | Fastening bolt with adjustable screw pitch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112412948A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762081A (en) * | 2021-03-02 | 2021-05-07 | 夏俊文 | Self-adaptive quick mounting nut |
| CN113235779A (en) * | 2021-03-18 | 2021-08-10 | 江苏固德威尔金属制品有限公司 | Stainless steel spring pin for curtain wall |
| CN113503940A (en) * | 2021-07-09 | 2021-10-15 | 武汉新烽光电股份有限公司 | Method and device for improving precision of three-dimensional laser radar water level gauge |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000047905A1 (en) * | 1999-02-12 | 2000-08-17 | Yamahiro Co., Ltd. | Anchor bolt and tool for installing the bolt |
| CN108408566A (en) * | 2018-05-17 | 2018-08-17 | 张家港凯斯机械有限公司 | It is a kind of that there is the suspender for lifting convertible suspension hook |
| CN109496102A (en) * | 2018-12-06 | 2019-03-19 | 蚌埠泰欣电子科技有限公司 | A kind of operation cabinet with overturning regulating mechanism |
| CN109578697A (en) * | 2018-11-29 | 2019-04-05 | 常州信息职业技术学院 | A kind of one-mast support riser cradle with lateral adjustment assemble mechanism |
| CN209908952U (en) * | 2019-03-31 | 2020-01-07 | 逸韩机械科技(上海)有限公司 | Improved anti-falling screw structure |
| CN210715423U (en) * | 2019-06-10 | 2020-06-09 | 张家港市旭德铝制品有限公司 | High-precision hollow ultrathin aluminum profile with structure-adjustable locking mechanism |
-
2020
- 2020-11-19 CN CN202011302673.4A patent/CN112412948A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000047905A1 (en) * | 1999-02-12 | 2000-08-17 | Yamahiro Co., Ltd. | Anchor bolt and tool for installing the bolt |
| CN108408566A (en) * | 2018-05-17 | 2018-08-17 | 张家港凯斯机械有限公司 | It is a kind of that there is the suspender for lifting convertible suspension hook |
| CN109578697A (en) * | 2018-11-29 | 2019-04-05 | 常州信息职业技术学院 | A kind of one-mast support riser cradle with lateral adjustment assemble mechanism |
| CN109496102A (en) * | 2018-12-06 | 2019-03-19 | 蚌埠泰欣电子科技有限公司 | A kind of operation cabinet with overturning regulating mechanism |
| CN209908952U (en) * | 2019-03-31 | 2020-01-07 | 逸韩机械科技(上海)有限公司 | Improved anti-falling screw structure |
| CN210715423U (en) * | 2019-06-10 | 2020-06-09 | 张家港市旭德铝制品有限公司 | High-precision hollow ultrathin aluminum profile with structure-adjustable locking mechanism |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762081A (en) * | 2021-03-02 | 2021-05-07 | 夏俊文 | Self-adaptive quick mounting nut |
| CN113235779A (en) * | 2021-03-18 | 2021-08-10 | 江苏固德威尔金属制品有限公司 | Stainless steel spring pin for curtain wall |
| CN113503940A (en) * | 2021-07-09 | 2021-10-15 | 武汉新烽光电股份有限公司 | Method and device for improving precision of three-dimensional laser radar water level gauge |
| CN113503940B (en) * | 2021-07-09 | 2023-03-24 | 武汉新烽光电股份有限公司 | Method and device for improving precision of three-dimensional laser radar water level gauge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112412948A (en) | Fastening bolt with adjustable screw pitch | |
| CN112324782B (en) | Easily accomodate formula folding bolt | |
| CN206873064U (en) | A kind of press box mechanism of sewing machine | |
| CN101818754B (en) | Lock nut for injection machine | |
| CN208605489U (en) | A kind of bolt assembly | |
| CN110953227A (en) | Gear type double-end connecting piece | |
| CN112412946A (en) | Fastening bolt with telescopic adjusting mechanism | |
| CN216407444U (en) | Single nut locking structure | |
| CN112431835A (en) | Assembling bolt with telescopic elastic mechanism | |
| CN213831870U (en) | Steering linkage assembly and commercial vehicle | |
| CN201031847Y (en) | Collapsible locking type screw nail | |
| CN207261062U (en) | The mechanical tappet in adjustable valve actuating mechanism gap | |
| CN210739023U (en) | Vehicle iron core air expansion disc | |
| CN220714798U (en) | Multi-link mechanism | |
| CN221160131U (en) | Novel sleeve | |
| CN112503083A (en) | Fastening bolt with wide application | |
| CN112555256A (en) | Anti-seismic bolt with quick-release limiting mechanism | |
| CN217976952U (en) | Fastening bolt with multiple adjusting modes | |
| CN217402045U (en) | Synchronous regulation formula ripple expansion joint | |
| CN218266709U (en) | Threaded fastener with wide application range | |
| CN214533950U (en) | Universal-strength fastening bolt and nut | |
| CN212766455U (en) | Novel steering drag link structure | |
| CN219640156U (en) | Simple telescopic folding light supplementing lamp | |
| CN220415952U (en) | Fixing bolt capable of adjusting tension | |
| CN221138277U (en) | Adjustable straight pull rod assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210226 |
|
| WW01 | Invention patent application withdrawn after publication |