CN104879591B - Plugging tee joint with detachable flange - Google Patents
Plugging tee joint with detachable flange Download PDFInfo
- Publication number
- CN104879591B CN104879591B CN201510298569.5A CN201510298569A CN104879591B CN 104879591 B CN104879591 B CN 104879591B CN 201510298569 A CN201510298569 A CN 201510298569A CN 104879591 B CN104879591 B CN 104879591B
- Authority
- CN
- China
- Prior art keywords
- threeway
- flange
- tee joint
- main
- closure
- 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.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000003466 welding Methods 0.000 claims description 7
- 238000005538 encapsulation Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- 230000003405 preventing Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0nMS4wJyBlbmNvZGluZz0naXNvLTg4NTktMSc/Pgo8c3ZnIHZlcnNpb249JzEuMScgYmFzZVByb2ZpbGU9J2Z1bGwnCiAgICAgICAgICAgICAgeG1sbnM9J2h0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnJwogICAgICAgICAgICAgICAgICAgICAgeG1sbnM6cmRraXQ9J2h0dHA6Ly93d3cucmRraXQub3JnL3htbCcKICAgICAgICAgICAgICAgICAgICAgIHhtbG5zOnhsaW5rPSdodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rJwogICAgICAgICAgICAgICAgICB4bWw6c3BhY2U9J3ByZXNlcnZlJwp3aWR0aD0nMzAwcHgnIGhlaWdodD0nMzAwcHgnIHZpZXdCb3g9JzAgMCAzMDAgMzAwJz4KPCEtLSBFTkQgT0YgSEVBREVSIC0tPgo8cmVjdCBzdHlsZT0nb3BhY2l0eToxLjA7ZmlsbDojRkZGRkZGO3N0cm9rZTpub25lJyB3aWR0aD0nMzAwLjAnIGhlaWdodD0nMzAwLjAnIHg9JzAuMCcgeT0nMC4wJz4gPC9yZWN0Pgo8cGF0aCBjbGFzcz0nYm9uZC0wIGF0b20tMCBhdG9tLTEnIGQ9J00gMTk0LjIsMTUwLjAgTCAxMDQuMywxNTAuMCcgc3R5bGU9J2ZpbGw6bm9uZTtmaWxsLXJ1bGU6ZXZlbm9kZDtzdHJva2U6IzQyODRGNDtzdHJva2Utd2lkdGg6Mi4wcHg7c3Ryb2tlLWxpbmVjYXA6YnV0dDtzdHJva2UtbGluZWpvaW46bWl0ZXI7c3Ryb2tlLW9wYWNpdHk6MScgLz4KPHBhdGggY2xhc3M9J2JvbmQtMCBhdG9tLTAgYXRvbS0xJyBkPSdNIDE5NC4yLDEwOS4xIEwgMTA0LjMsMTA5LjEnIHN0eWxlPSdmaWxsOm5vbmU7ZmlsbC1ydWxlOmV2ZW5vZGQ7c3Ryb2tlOiM0Mjg0RjQ7c3Ryb2tlLXdpZHRoOjIuMHB4O3N0cm9rZS1saW5lY2FwOmJ1dHQ7c3Ryb2tlLWxpbmVqb2luOm1pdGVyO3N0cm9rZS1vcGFjaXR5OjEnIC8+CjxwYXRoIGNsYXNzPSdib25kLTAgYXRvbS0wIGF0b20tMScgZD0nTSAxOTQuMiwxOTAuOSBMIDEwNC4zLDE5MC45JyBzdHlsZT0nZmlsbDpub25lO2ZpbGwtcnVsZTpldmVub2RkO3N0cm9rZTojNDI4NEY0O3N0cm9rZS13aWR0aDoyLjBweDtzdHJva2UtbGluZWNhcDpidXR0O3N0cm9rZS1saW5lam9pbjptaXRlcjtzdHJva2Utb3BhY2l0eToxJyAvPgo8dGV4dCB4PScyNDAuMycgeT0nMTcwLjAnIGNsYXNzPSdhdG9tLTAnIHN0eWxlPSdmb250LXNpemU6NDBweDtmb250LXN0eWxlOm5vcm1hbDtmb250LXdlaWdodDpub3JtYWw7ZmlsbC1vcGFjaXR5OjE7c3Ryb2tlOm5vbmU7Zm9udC1mYW1pbHk6c2Fucy1zZXJpZjt0ZXh0LWFuY2hvcjpzdGFydDtmaWxsOiM0Mjg0RjQnID5OPC90ZXh0Pgo8dGV4dCB4PSczNS43JyB5PScxNzAuMCcgY2xhc3M9J2F0b20tMScgc3R5bGU9J2ZvbnQtc2l6ZTo0MHB4O2ZvbnQtc3R5bGU6bm9ybWFsO2ZvbnQtd2VpZ2h0Om5vcm1hbDtmaWxsLW9wYWNpdHk6MTtzdHJva2U6bm9uZTtmb250LWZhbWlseTpzYW5zLXNlcmlmO3RleHQtYW5jaG9yOnN0YXJ0O2ZpbGw6IzQyODRGNCcgPk48L3RleHQ+Cjwvc3ZnPgo= data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0nMS4wJyBlbmNvZGluZz0naXNvLTg4NTktMSc/Pgo8c3ZnIHZlcnNpb249JzEuMScgYmFzZVByb2ZpbGU9J2Z1bGwnCiAgICAgICAgICAgICAgeG1sbnM9J2h0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnJwogICAgICAgICAgICAgICAgICAgICAgeG1sbnM6cmRraXQ9J2h0dHA6Ly93d3cucmRraXQub3JnL3htbCcKICAgICAgICAgICAgICAgICAgICAgIHhtbG5zOnhsaW5rPSdodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rJwogICAgICAgICAgICAgICAgICB4bWw6c3BhY2U9J3ByZXNlcnZlJwp3aWR0aD0nODVweCcgaGVpZ2h0PSc4NXB4JyB2aWV3Qm94PScwIDAgODUgODUnPgo8IS0tIEVORCBPRiBIRUFERVIgLS0+CjxyZWN0IHN0eWxlPSdvcGFjaXR5OjEuMDtmaWxsOiNGRkZGRkY7c3Ryb2tlOm5vbmUnIHdpZHRoPSc4NS4wJyBoZWlnaHQ9Jzg1LjAnIHg9JzAuMCcgeT0nMC4wJz4gPC9yZWN0Pgo8cGF0aCBjbGFzcz0nYm9uZC0wIGF0b20tMCBhdG9tLTEnIGQ9J00gNjIuNiw0Mi4wIEwgMjEuMiw0Mi4wJyBzdHlsZT0nZmlsbDpub25lO2ZpbGwtcnVsZTpldmVub2RkO3N0cm9rZTojNDI4NEY0O3N0cm9rZS13aWR0aDoxLjBweDtzdHJva2UtbGluZWNhcDpidXR0O3N0cm9rZS1saW5lam9pbjptaXRlcjtzdHJva2Utb3BhY2l0eToxJyAvPgo8cGF0aCBjbGFzcz0nYm9uZC0wIGF0b20tMCBhdG9tLTEnIGQ9J00gNjIuNiwzMC40IEwgMjEuMiwzMC40JyBzdHlsZT0nZmlsbDpub25lO2ZpbGwtcnVsZTpldmVub2RkO3N0cm9rZTojNDI4NEY0O3N0cm9rZS13aWR0aDoxLjBweDtzdHJva2UtbGluZWNhcDpidXR0O3N0cm9rZS1saW5lam9pbjptaXRlcjtzdHJva2Utb3BhY2l0eToxJyAvPgo8cGF0aCBjbGFzcz0nYm9uZC0wIGF0b20tMCBhdG9tLTEnIGQ9J00gNjIuNiw1My42IEwgMjEuMiw1My42JyBzdHlsZT0nZmlsbDpub25lO2ZpbGwtcnVsZTpldmVub2RkO3N0cm9rZTojNDI4NEY0O3N0cm9rZS13aWR0aDoxLjBweDtzdHJva2UtbGluZWNhcDpidXR0O3N0cm9rZS1saW5lam9pbjptaXRlcjtzdHJva2Utb3BhY2l0eToxJyAvPgo8dGV4dCB4PSc2NC4wJyB5PSc1My42JyBjbGFzcz0nYXRvbS0wJyBzdHlsZT0nZm9udC1zaXplOjIzcHg7Zm9udC1zdHlsZTpub3JtYWw7Zm9udC13ZWlnaHQ6bm9ybWFsO2ZpbGwtb3BhY2l0eToxO3N0cm9rZTpub25lO2ZvbnQtZmFtaWx5OnNhbnMtc2VyaWY7dGV4dC1hbmNob3I6c3RhcnQ7ZmlsbDojNDI4NEY0JyA+TjwvdGV4dD4KPHRleHQgeD0nNi4xJyB5PSc1My42JyBjbGFzcz0nYXRvbS0xJyBzdHlsZT0nZm9udC1zaXplOjIzcHg7Zm9udC1zdHlsZTpub3JtYWw7Zm9udC13ZWlnaHQ6bm9ybWFsO2ZpbGwtb3BhY2l0eToxO3N0cm9rZTpub25lO2ZvbnQtZmFtaWx5OnNhbnMtc2VyaWY7dGV4dC1hbmNob3I6c3RhcnQ7ZmlsbDojNDI4NEY0JyA+TjwvdGV4dD4KPC9zdmc+Cg== N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 238000005536 corrosion prevention Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/115—Caps
Abstract
The invention relates to a plugging tee joint with a detachable flange. The inside of a tee joint body is communicated with a tee joint protecting plate through a tee joint connection pipe, a plug handle is positioned coaxially and radially and is sealed in the tee joint body, the flange is mounted outside the tee joint body in a thread engagement manner, a seal head is welded on an upper end opening of the tee joint body, a key groove is formed in the outer edge of the tee joint body axially, a locking key is pinned in the key groove radially, and the flange is radially positioned and fixedly mounted. The plugging tee joint with the detachable flange has the advantages that the flange of the plugging tee joint is connected with the tee joint body in a thread engagement manner, the locking key is used for radial fixing, a seam allowance sealing pad is used for sealing, and after plugging construction is completed, the buried tee joint reserved on a pipeline can not be covered with a blind plate after being sealed by the welded seal head, and no bolt is left on the pipeline to serve as a fitting, thus, the buried permanency requirement of the long-distance pipeline can be met more effectively, hidden danger of leakage is reduced, oil stealing preventing effect is extraordinarily good and potential safety hazards are avoided effectively.
Description
Technical field
The invention belongs to oil gas transmission field, it is related to oil and gas pipes and implements the technique threeway that press and open holes block operation, especially
It is a kind of closure threeway of dismountable flange.
Background technology
Closure threeway is to implement a kind of indispensable technique threeway that press and open holes block operation on oil and gas pipes.Traditional
Threeway main body, closure backplate, plug handle, blind plate, bolt, point lobe snap ring is included, threeway main body is radially solid in a set of closure threeway
It is contained on closure backplate, coaxial positioning package has plug handle in threeway main body, fills blind plate in threeway main body upper end cover, this blind plate leads to
Cross bolt to be packaged fastening.As publication (title: a kind of closure threeway, publication number cn201764181u) is described, should
Closure threeway includes blind flange, the fluting flange with operation path, the threeway plug handle being arranged in described operation path, threeway
Backplate and the snap ring mechanism being arranged on described fluting flange；One end of described fluting flange is fixing with described threeway backplate even
Connect, the other end is detachably connected with described blind flange；Described threeway plug handle outer surface is provided with plug handle seal groove and snap ring locking
Groove, is provided with plug handle sealing ring in described plug handle seal groove.
The closure threeway of technological document disclosed above, after installing, leaves blind plate and outer connecting bolt in outside, right
Follow-up corrosion prevention operation impacts.And, this frame mode, turn on bolt to robber and open blind plate and steal stripping of oil confession
Condition, therefore anti-theft effect is poor, and stolen result also produces the leakage of pipeline, potential safety hazard is larger, does not meet long defeated pipe
The buried permanent requirement in road, meanwhile, sealing gasket and the durable for a long time of bolt there is also risk.
By retrieval, not yet find and the present patent application identical patent document.
Content of the invention
It is an object of the invention to overcoming the shortcomings of original technology, provide that a kind of design science is ingenious, good anti-theft effect, one-tenth
The closure threeway of this cheap dismountable flange.
The object of the present invention is achieved like this:
A kind of closure threeway of dismountable flange, including threeway backplate, threeway main body, t-joint, flange and plug handle, three
Coaxial package tubing in logical backplate, threeway backplate radial direction is fixedly connected with t-joint, this t-joint and the same footpath of threeway main body
Coaxially it is fixedly mounted with, connected with threeway backplate by t-joint in threeway main body, coaxial radial positioning is packaged with threeway main body
Plug handle, outside threeway main body pass through screw thread engagement system mounting flange it is characterised in that: threeway main body upper port using weldering
The mode of connecing is welded with end socket, is axially formed with a keyway in threeway main body outer rim, and in this keyway, radial peg, should equipped with a locking key
Locking key radial positioning is fixedly mounted with flange；On flange, plane inner edge is formed with a spill annular groove, is co-axially mounted in this spill annular groove
There is rim of the mouth sealing gasket, between this rim of the mouth sealing gasket and threeway main body, sealing ring is installed.
And, in end socket top middle portion, one aerofluxuss plug is installed.
And, the threeway main body of flange lower surface is coaxially fixedly mounted with one shockproof standby female.
And, described end socket uses hemisphere shape.
And, the upper plane of described rim of the mouth sealing gasket protrudes plane on flange.
And, described threeway inner major diameter is positioned to the plug handle of positioning package using interior packing.
Advantages of the present invention and good effect are:
1st, the flange of this closure threeway is connected with the engagement of threeway main body screw, and is carried out radially fixed using locking key, son
The sealing of mouthful sealing gasket, after the completion of plugging construction, stay the buried threeway on pipeline pass through to weld after end socket seals can not lid blind plate,
Do not stay bolt, as the pipe fitting stayed on pipeline, more conform to the buried permanent requirement of long distance pipeline, decrease leakage hidden
Suffer from, anti-theft effect is very good, effectively prevent potential safety hazard；The aerofluxuss plug installed in end socket top middle portion can inject nitrogen
Gas, to ensure that welding gets angry safety.
2nd, demounting flange, in the welding end socket suitable for reading of threeway main body, can be welded after this closure threeway installing stopper with pressure handle
After can not study in France orchid and blind plate, easily facilitate the corrosion prevention operation of postorder.
3rd, the flange of this closure threeway is reusable after removal, and can cut the finished product expense of blind plate, bolt, flange
With greatly reducing cost, design science rationally, is skillfully constructed.
Brief description
Fig. 1 is the contour structures schematic diagram of the present invention；
Fig. 2 is the a-a of Fig. 1 to cross-sectional view.
Specific embodiment
Describe embodiments of the invention below in conjunction with the accompanying drawings in detail；It should be noted that the present embodiment is narrative, no
It is determinate it is impossible to protection scope of the present invention is limited with this.
A kind of closure threeway of dismountable flange, including threeway backplate 8, threeway main body 6, t-joint 7, flange 4 and plug
Handle 11, coaxial package tubing 12 in threeway backplate, threeway backplate radial direction is coaxially connected with t-joint, this t-joint and threeway
Main body is fixedly mounted with footpath coaxial welding, is connected with threeway backplate by t-joint, the same diameter of axle in threeway main body in threeway main body
There is plug handle to positioning package, pass through screw thread engagement system mounting flange outside threeway main body.
The innovative point of the present invention is:
1st, the upper port of threeway main body is welded with end socket 2 using welding manner, and this end socket adopts in the present embodiment accompanying drawing
Be hemisphere shape, it would however also be possible to employ other shapes.Threeway main body and end socket adopt welding manner, can make in threeway main body and outer
Boundary closes, it is to avoid leak and stolen.In end socket top middle portion, one aerofluxuss plug 1 is installed, in case nitrogen injection is it is ensured that welding is got angry
Safety.
2nd, axially it is formed with a keyway in threeway main body outer rim, radial peg is equipped with a locking key 13, this stop in this keyway
Key radial positioning can be fixedly mounted with flange；On flange, plane inner edge is formed with a spill annular groove, is coaxially installed with this spill annular groove
Rim of the mouth sealing gasket 3, is provided with o type sealing ring 9 between this sealing gasket internal diameter and threeway main body；The upper plane of rim of the mouth sealing gasket is protruded
Plane on flange, to realize the seam location fit with valve.The threeway main body of flange lower surface is coaxially fixedly mounted with one shockproof
Standby female 5, this shockproof standby mother has been cushioning effect during press and open holes.
3rd, threeway inner major diameter is positioned to the plug handle of positioning package using interior packing 10.
Additionally, in the present embodiment accompanying drawing, threeway backplate is to be connected with threeway main body by t-joint, and threeway backplate also may be used
Directly to connect with threeway main body.
The using method of the present invention is:
After the completion of plugging holes operation, installing stopper handle with pressure, after flange inner spout is blocked, by flange rotate counterclockwise,
Flange can be laid down, then weld end socket at upper orifice, complete to block the sealing work of threeway.Locking key is that control flange is fixed
Position, rim of the mouth sealing gasket plays the effect of flange rim of the mouth positioning, plays the sealing to flange and threeway cooperation for the o type sealing ring again
Effect.
Claims (6)
1. the closure threeway of a kind of dismountable flange, including threeway backplate, threeway main body, t-joint, flange and plug handle, threeway
Coaxial package tubing in backplate, threeway backplate radial direction is fixedly connected with t-joint, and this t-joint is same with footpath with threeway main body
Axle is fixedly mounted with, and is connected with threeway backplate by t-joint, in threeway main body, coaxial radial positioning is packaged with plug in threeway main body
Handle, outside threeway main body pass through screw thread engagement system mounting flange it is characterised in that: threeway main body upper port using welding
Mode is welded with end socket, is axially formed with a keyway in threeway main body outer rim, and in this keyway, radial peg, should be only equipped with a locking key
Dynamic key radial positioning is fixedly mounted with flange；On flange, plane inner edge is formed with a spill annular groove, is coaxially installed with this spill annular groove
Rim of the mouth sealing gasket, is provided with sealing ring between this rim of the mouth sealing gasket and threeway main body.
2. dismountable flange according to claim 1 closure threeway it is characterised in that: end socket top middle portion install one
Aerofluxuss plug.
3. dismountable flange according to claim 1 closure threeway it is characterised in that: in the threeway master of flange lower surface
Coaxially it is fixedly mounted with one shockproof standby female on body.
4. dismountable flange according to claim 1 and 2 closure threeway it is characterised in that: described end socket uses
Hemisphere shape.
5. dismountable flange according to claim 1 closure threeway it is characterised in that: described rim of the mouth sealing gasket upper flat
Plane on flange is protruded in face.
6. dismountable flange according to claim 1 closure threeway it is characterised in that: described threeway inner major diameter is to fixed
The plug handle of position encapsulation is positioned using interior packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510298569.5A CN104879591B (en) | 2015-06-03 | 2015-06-03 | Plugging tee joint with detachable flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510298569.5A CN104879591B (en) | 2015-06-03 | 2015-06-03 | Plugging tee joint with detachable flange |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104879591A CN104879591A (en) | 2015-09-02 |
| CN104879591B true CN104879591B (en) | 2017-01-25 |
Family
ID=53947199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510298569.5A Active CN104879591B (en) | 2015-06-03 | 2015-06-03 | Plugging tee joint with detachable flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104879591B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3948282A (en) * | 1972-04-12 | 1976-04-06 | Yano Giken Co., Ltd. | Method and device for attaching shut-off control valve to distributing water pipe such as service pipe without stopping passage of water therethrough |
| US4513788A (en) * | 1983-11-28 | 1985-04-30 | Koppl Company Inc. | Flange system for pipeline plugging |
| US5975142A (en) * | 1998-08-10 | 1999-11-02 | Tdw Delaware, Inc. | Removable closure system |
| KR101219189B1 (en) * | 2010-08-24 | 2013-01-08 | 동화산업 주식회사 | Installation apparatus of plug for stopping gas flowing in gas pipe |
| CN201764181U (en) * | 2010-09-29 | 2011-03-16 | 天津绿清管道科技发展有限公司 | Three-way block |
| CN203052091U (en) * | 2012-12-27 | 2013-07-10 | 重庆科众机械有限公司 | Plugging connector |
| CN203585706U (en) * | 2013-08-23 | 2014-05-07 | 中国石油天然气集团公司 | T-shaped dual-seal pipeline leaking stoppage clamp |
| CN103672269B (en) * | 2013-12-11 | 2016-01-20 | 河北一塑管道制造有限责任公司 | Conveyance conduit saddle bypass press and open holes connection set |
| CN204677953U (en) * | 2015-06-03 | 2015-09-30 | 天津卓达管道机械制造有限公司 | A kind of shutoff threeway of dismountable flange |
-
2015
- 2015-06-03 CN CN201510298569.5A patent/CN104879591B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104879591A (en) | 2015-09-02 |
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| C06 | Publication | ||
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| EXSB | Decision made by sipo to initiate substantive examination | ||
| GR01 | Patent grant | ||
| C14 | Grant of patent or utility model |