CN109812581A - A kind of dry-grinding type combination sealing arrangement - Google Patents
A kind of dry-grinding type combination sealing arrangement Download PDFInfo
- Publication number
- CN109812581A CN109812581A CN201910140619.5A CN201910140619A CN109812581A CN 109812581 A CN109812581 A CN 109812581A CN 201910140619 A CN201910140619 A CN 201910140619A CN 109812581 A CN109812581 A CN 109812581A
- Authority
- CN
- China
- Prior art keywords
- seal
- axis
- ring
- dry
- throw
- 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
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 43
- 238000009837 dry grinding Methods 0.000 title claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 9
- 239000011159 matrix material Substances 0.000 claims abstract description 9
- 210000004907 gland Anatomy 0.000 claims description 12
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Landscapes
- Sealing Devices (AREA)
- Mechanical Sealing (AREA)
Abstract
The present invention provides a kind of dry-grinding type combination sealing arrangements, including axis and around the seal of the axis, sealing structure is equipped in the glade plane space of the axis and the seal, the sealing structure includes: the first seal groove, the pushing out ring of the radial deformation equipped with throw-out collar and the axis described in throw-out collar effect lower edge in first seal groove；Second seal groove, second seal groove is interior to be equipped with Glais ring, and the O-ring seals of the Glais ring offset with the second sealing groove bottom, and the rectangular loop of the Glais ring offsets with the axis；The pushing out ring includes the matrix and described matrix both ends opposite with the throw-out collar to the inclined variant part in pushing out ring side, and the variant part of the adjacent pushing out ring offsets, and the pushing out ring includes the force surface to offset with the variant part.The device can be improved wear-resisting property, good airproof performance, long service life.
Description
Technical field
The present invention relates to technical field of sealing technology more particularly to a kind of dry-grinding type combination sealing arrangements.
Background technique
In chemical industry, many chemical reactions need high pressure, condition of high vacuum degree, it is high-revolving under the conditions of carry out, due to
Transmission shaft is applied in inside and outside equipment, and there are a circumferential clearance between such transmission shaft and reaction vessel, the medium in equipment is logical
It crosses the gap to leak out, if pressure is subatmospheric in equipment, air is to equipment internal leakage, it is therefore necessary to have a resistance
The gland seal device of stopping leak leakage, otherwise not can guarantee the reaction condition of high pressure, condition of high vacuum degree not only, also will cause toxic and harmful gas
Leakage, influence reaction process.For dry-grinding type mechanical seal structure, when seal face is in dry condition, both ends of the surface
Between surface of solids dimpling granule will directly contact and cause end face to rub, so on the one hand can make friction surface substance forfeiture
Or migration, cause seal surface to be worn, influences sealing effect；On the other hand a large amount of frictional heat can be generated until burning sealing
Component.Under the operating condition of no liquid medium, how to realize that prolonged dry friction is always that field technical staff can not overcome
Problem.
Summary of the invention
The present invention provides a kind of dry-grinding type combination sealing arrangements, can be improved wear-resisting property, good airproof performance, service life
It is long.
In order to reach the purpose, the present invention adopts the following technical scheme:
A kind of dry-grinding type combination sealing arrangement is set on axis, including the seal around the axis, the axis and the sealing
Sealing structure is equipped in the glade plane space of body, the sealing structure includes:
First seal groove, the interior radial deformation equipped with throw-out collar and the axis described in throw-out collar effect lower edge of first seal groove
Pushing out ring；
Second seal groove, second seal groove is interior to be equipped with O-ring seals and rectangular loop, the O-ring seals and described second
Sealing groove bottom offsets, and the rectangular loop offsets with the axis；
The pushing out ring includes the variant part of the matrix and described matrix both ends opposite with the throw-out collar, the pushing out ring include with
The force surface that the variant part offsets.
As a preference, being provided with multiple rings towards the axis side in the rectangular loop in second seal groove
Connected in star.
As a preference, the throw-out collar includes the medial surface and lateral surface being parallel to each other, the medial surface and the axis
Surface it is opposite, the surface of the medial surface and the axis, the lateral surface and first sealing groove bottom between be equipped with gap.
As a preference, the seal end is equipped with gland, the gland includes interconnecting piece and partially protrudes into described
The pushing part of first seal groove, the pushing part offset with the throw-out collar.
As a preference, being connected by screw between the interconnecting piece and the seal, the screw and the company
Spring washer is equipped between socket part.
As a preference, the seal side is equipped with tank body, the seal is set close to tank body side outer rim
There is annular groove, for the tank end in the annular groove, the tank wall inner radius is equipped with O-ring.
As a preference, being connected by screw between the seal and the tank body, the screw passes through the ring
Shape slot.
As a preference, being equipped with bearing, the seal and the bearing outer ring side between the tank body and the axis
Wall offsets.
As a preference, being provided with hard wear-resistant coating with the seal contact position on the axis.
As a preference, the pushing out ring is formed with the throw-out collar by polytetrafluoroethylene (PTFE), the rectangular loop is by enhancing poly- four
Vinyl fluoride is formed.
As a preference, being equipped with gap between the outer surface of the axis and the seal and the gland.
As a preference, being equipped with the appearance around the axis that cross sectional shape is rectangle between adjacent second seal groove
Chamber.
To sum up, compared with the prior art, the advantages of the present invention are as follows the extruding work of throw-out collar in the first seal groove in gland
With the lower axial movement along bar and pushing out ring is squeezed, the variant part of pushing out ring is under the action of force surface to axis and seal side
It opens and the gap between close encapsulation body and axis, multiple pushing out rings stacking settings ensure that its sealing effect；Due to throw-out collar and pushing out ring
It is deformed in the radial and axial of axis, therefore structural wear to a certain extent can be compensated for deformation, to improve
The wear-resisting property and service life of sealing structure；O-ring seals in second seal groove provide radial elastic power, to guarantee to dry grind
The sealing effect of rectangular loop in the process；Gap, and multiple flute profile knots including cavity are equipped between seal and axis
Structure carries out transfer spreading to the heat of generation in axis rotation process to accommodate the air of certain volume.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is schematic enlarged-scale view at A in Fig. 1.
Label in figure is as follows:
1. axis, 2. seals, 21. annular grooves, 211.O shape circle, 3. sealing structures, 31. first seal grooves, 311. throw-out collars, 3111.
Medial surface, 3112. lateral surfaces, 3113. force surfaces, 312. pushing out rings, 3121. matrixes, 3122. variant parts, 32. second seal grooves,
321.O shape sealing ring, 322. rectangular loops, 3221. annular grooves, 4. glands, 41. interconnecting pieces, 42. pushing parts, 5. tank bodies, 6. axis
It holds.
Specific embodiment
The invention will be further described for middle embodiment with reference to the accompanying drawing.
A kind of dry-grinding type combination sealing arrangement as shown in Figures 1 and 2, be set to axis 1 on along the extending direction of axis 1 every
It opens inside water-tight equipment and exterior space, the combination sealing arrangement includes the seal 2 for surrounding the setting of axis 1, axis 1 and seal 2
Glade plane space in be equipped with sealing structure 3, sealing structure 3 include the first seal groove 31 and the second seal groove 32.First seal groove
Along the pushing out ring 312 of the radial deformation of axis 1 equipped with throw-out collar 311 and under the effect of throw-out collar 311 in 31, pushing out ring 312 can for one or
It is multiple, four are selected as in the present embodiment.O-ring seals 321 and rectangular loop 322, O-ring seals are equipped in second seal groove 32
321 offset with 32 bottom surface of the second seal groove, and rectangular loop 322 offsets with axis 1.O-ring seals 321 and rectangular loop 322 can be one
Body structure, such as Glais ring can also be two separate structures, can replace to rectangular loop 322.Pushing out ring 312 includes and throw-out collar
The variant part 3122 being obliquely installed at 3121 both ends of matrix 3121 and matrix of 311 axial directions that are opposite and being located at axis 1,
The variant part 3122 of adjacent pushing out ring 312 offsets, and throw-out collar 311 includes the force surface 3113 to offset with variant part 3122, force surface
3113 be the inclined-plane being symmetricly set on throw-out collar 311, and force surface 3113 offsets with 3122 end regions of variant part, throw-out collar 311 with
Gap is equipped between the matrix 3121 of pushing out ring 312 and between adjacent base 3121, gas heat absorption expansion squeezes pushing out ring in gap
312, to guarantee sealing effect during 1 high-speed rotation of axis.Pushing out ring 312 is formed with throw-out collar 311 by polytetrafluoroethylene (PTFE), rectangle
Circle 322 is formed by reinforced TFE, and O-ring seals 321 can be formed for rubber material.
The quantity of second seal groove 32 can be one or more, be selected as three in the present embodiment, towards axis in rectangular loop 322
1 side is provided with multiple annular grooves 3221.Throw-out collar 311 includes the medial surface 3111 and lateral surface 3112 being parallel to each other, inside
Face 3111 is opposite with the surface of axis 1, between 31 bottom surface of surface, lateral surface 3112 and the first seal groove of medial surface 3111 and axis 1
Equipped with gap.2 end of seal is equipped with gland 4, and gland 4 includes interconnecting piece 41 and the pushing part for partially protruding into the first seal groove 31
42, pushing part 42 offsets with throw-out collar 311.
Throw-out collar 311 in first seal groove 31 along the axial movement of bar and squeezes pushing out ring under the squeezing action of gland 4
312, the variant part 3122 of pushing out ring 312 opens simultaneously close encapsulation body to axis 1 and 2 side of seal under the action of force surface 3113
Gap between 2 and axis 1, multiple pushing out rings 312, which stack setting, can guarantee its sealing effect.Since throw-out collar 311 and pushing out ring 312 exist
The radial and axial of axis 1 is deformed, therefore structural wear to a certain extent can be added with deformation, to improve sealing
The wear-resisting property and service life of structure 3.
It is connected by screw between interconnecting piece 41 and seal 2, spring washer is equipped between screw and interconnecting piece 41.Sealing
2 side of body is equipped with tank body 5, and seal 2 is equipped with annular groove 21 close to 5 side outer rim of tank body, and 5 end of tank body is embedded in annular groove 21
Interior, 5 side wall inner radius of tank body is equipped with O-ring 211.It is connected by screw between seal 2 and tank body 5, screw passes through annular groove
21.Bearing 6 is equipped between tank body 5 and axis 1, seal 2 offsets with 6 outer ring side wall of bearing.
2 contact position of seal is provided with hard wear-resistant coating on axis 1, can be spraying to guarantee the service life of axis 1
The ceramic layer of formation.Gap is equipped between the outer surface and seal 2 and gland 4 of axis 1.It is equipped between adjacent second seal groove 32
Cross sectional shape is the cavity of the circular axis 1 of rectangle, the depth of the depth of cavity less than the second seal groove 32.Seal 2 and axis 1 it
Between be equipped with gap, and multiple bathtub constructions including cavity, to accommodate the air of certain volume, in 1 rotation process of axis
In transfer spreading is carried out to the heat of generation.
Described above is only explanation of the invention, so that those of ordinary skill in the art's can completely implements we
Case, but be not limitation of the present invention, those skilled in the art can according to need after reading this specification to this reality
The modification that example makes not creative contribution is applied, these are all without creative modification, but as long as in right of the invention
All by the protection of Patent Law in claimed range.
Claims (10)
1. a kind of dry-grinding type combination sealing arrangement is set on axis (1), described including the seal (2) around the axis (1)
Sealing structure (3) are equipped in axis (1) and the glade plane space of the seal (2), which is characterized in that sealing structure (3) packet
It includes:
First seal groove (31), first seal groove (31) is interior to be equipped with throw-out collar (311) and under the throw-out collar (311) effect
Along the pushing out ring (312) of the radial deformation of the axis (1)；
Second seal groove (32), second seal groove (32) is interior to be equipped with O-ring seals (321) and rectangular loop (322), the O
Shape sealing ring (321) offsets with the second seal groove (32) bottom surface, and the rectangular loop (322) offsets with the axis (1)；
The pushing out ring (312) includes the matrix (3121) and described matrix (3121) both ends opposite with the throw-out collar (311)
Variant part (3122), the pushing out ring (312) include the force surface (3113) contacted with the variant part (3122).
2. a kind of dry-grinding type combination sealing arrangement according to claim 1, it is characterised in that: second seal groove (32)
The axis (1) side is provided with multiple annular grooves (3221) in the interior rectangular loop (322).
3. a kind of dry-grinding type combination sealing arrangement according to claim 1, it is characterised in that: the throw-out collar (311) includes
The medial surface (3111) being parallel to each other and lateral surface (3112), the medial surface (3111) is opposite with the surface of the axis (1), institute
It states and is equipped between surface, the lateral surface (3112) and the first seal groove (31) bottom surface of medial surface (3111) and the axis (1)
Gap.
4. a kind of dry-grinding type combination sealing arrangement according to claim 1, it is characterised in that: seal (2) end
Equipped with gland (4), the gland (4) includes interconnecting piece (41) and the pushing part for partially protruding into first seal groove (31)
(42), the pushing part (42) offsets with the throw-out collar (311).
5. a kind of dry-grinding type combination sealing arrangement according to claim 4, it is characterised in that: the interconnecting piece (41) and institute
It states and is connected by screw between seal (2), spring washer is equipped between the screw and the interconnecting piece (41).
6. a kind of dry-grinding type combination sealing arrangement according to claim 1, it is characterised in that: seal (2) side
Equipped with tank body (5), the seal (2) is equipped with annular groove (21) close to the tank body (5) side outer rim, tank body (5) end
In the annular groove (21), tank body (5) the side wall inner radius is equipped with O-ring (211) in portion.
7. a kind of dry-grinding type combination sealing arrangement according to claim 6, it is characterised in that: the seal (2) and institute
It states and is connected by screw between tank body (5), the screw passes through the annular groove (21).
8. a kind of dry-grinding type combination sealing arrangement according to claim 6, it is characterised in that: the tank body (5) with it is described
Bearing (6) are equipped between axis (1), the seal (2) offsets with the bearing (6) outer ring side wall.
9. a kind of dry-grinding type combination sealing arrangement according to claim 1, it is characterised in that: the pushing out ring (312) and institute
It states throw-out collar (311) to be formed by polytetrafluoroethylene (PTFE), the rectangular loop (322) is formed by reinforced TFE.
10. a kind of dry-grinding type combination sealing arrangement according to claim 1, it is characterised in that: on the axis (1) with it is described
Seal (2) contact position is provided with hard wear-resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910140619.5A CN109812581A (en) | 2019-02-26 | 2019-02-26 | A kind of dry-grinding type combination sealing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910140619.5A CN109812581A (en) | 2019-02-26 | 2019-02-26 | A kind of dry-grinding type combination sealing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109812581A true CN109812581A (en) | 2019-05-28 |
Family
ID=66607429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910140619.5A Pending CN109812581A (en) | 2019-02-26 | 2019-02-26 | A kind of dry-grinding type combination sealing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109812581A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112642377A (en) * | 2020-12-28 | 2021-04-13 | 牡丹江师范学院 | Dynamic sealing device for chemical reaction kettle |
| CN113645794A (en) * | 2021-07-15 | 2021-11-12 | 北京遥测技术研究所 | Double-layer convolution type sealing structure and method based on height difference |
| CN114370505A (en) * | 2022-01-17 | 2022-04-19 | 江苏邑文微电子科技有限公司 | Combined sealing mechanism suitable for moving part in vacuum and semiconductor equipment |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES291640A1 (en) * | 1962-09-14 | 1964-02-16 | Pechiney Prod Chimiques Sa | Stuffing box construction |
| CN1485559A (en) * | 2002-08-23 | 2004-03-31 | ��˹�к��ʹ�˾ | Sealing ring |
| CN101038035A (en) * | 2006-12-12 | 2007-09-19 | 李採云 | Sleeve type combined sealing component and sealing method thereof |
| US20090146379A1 (en) * | 2007-12-07 | 2009-06-11 | Mike Foster | Seal assembly for high pressure dynamic and static services |
| CN102585906A (en) * | 2012-02-14 | 2012-07-18 | 合肥通用机械研究院 | Knocking device for removing carbon deposition from coal gasifier |
| CN102959279A (en) * | 2010-08-06 | 2013-03-06 | 爱信艾达株式会社 | Seal structure for continuously-variable transmission device |
| CN104390010A (en) * | 2014-11-29 | 2015-03-04 | 常州格瑞特车灯有限公司 | V-shaped sealing ring |
| CN105114632A (en) * | 2015-09-29 | 2015-12-02 | 温州市铁达干磨密封有限公司 | Sealing device of dry grinding machine |
| CN105317732A (en) * | 2015-10-19 | 2016-02-10 | 陕西科技大学 | Sealing device of ammonia feeding device |
| CN206563079U (en) * | 2017-03-07 | 2017-10-17 | 东营海森密封技术有限责任公司 | A kind of equipment of high temperature and high pressure condition sealing structure and high temperature and high pressure condition |
| CN108468810A (en) * | 2018-05-18 | 2018-08-31 | 四川日机密封件股份有限公司 | The enhanced non-contact mechanical seal structure of liquid |
| CN210050296U (en) * | 2019-02-26 | 2020-02-11 | 浙江兰天机械密封件有限公司 | Dry grinding type combined sealing device |
-
2019
- 2019-02-26 CN CN201910140619.5A patent/CN109812581A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES291640A1 (en) * | 1962-09-14 | 1964-02-16 | Pechiney Prod Chimiques Sa | Stuffing box construction |
| CN1485559A (en) * | 2002-08-23 | 2004-03-31 | ��˹�к��ʹ�˾ | Sealing ring |
| CN101038035A (en) * | 2006-12-12 | 2007-09-19 | 李採云 | Sleeve type combined sealing component and sealing method thereof |
| US20090146379A1 (en) * | 2007-12-07 | 2009-06-11 | Mike Foster | Seal assembly for high pressure dynamic and static services |
| CN102959279A (en) * | 2010-08-06 | 2013-03-06 | 爱信艾达株式会社 | Seal structure for continuously-variable transmission device |
| CN102585906A (en) * | 2012-02-14 | 2012-07-18 | 合肥通用机械研究院 | Knocking device for removing carbon deposition from coal gasifier |
| CN104390010A (en) * | 2014-11-29 | 2015-03-04 | 常州格瑞特车灯有限公司 | V-shaped sealing ring |
| CN105114632A (en) * | 2015-09-29 | 2015-12-02 | 温州市铁达干磨密封有限公司 | Sealing device of dry grinding machine |
| CN105317732A (en) * | 2015-10-19 | 2016-02-10 | 陕西科技大学 | Sealing device of ammonia feeding device |
| CN206563079U (en) * | 2017-03-07 | 2017-10-17 | 东营海森密封技术有限责任公司 | A kind of equipment of high temperature and high pressure condition sealing structure and high temperature and high pressure condition |
| CN108468810A (en) * | 2018-05-18 | 2018-08-31 | 四川日机密封件股份有限公司 | The enhanced non-contact mechanical seal structure of liquid |
| CN210050296U (en) * | 2019-02-26 | 2020-02-11 | 浙江兰天机械密封件有限公司 | Dry grinding type combined sealing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112642377A (en) * | 2020-12-28 | 2021-04-13 | 牡丹江师范学院 | Dynamic sealing device for chemical reaction kettle |
| CN113645794A (en) * | 2021-07-15 | 2021-11-12 | 北京遥测技术研究所 | Double-layer convolution type sealing structure and method based on height difference |
| CN114370505A (en) * | 2022-01-17 | 2022-04-19 | 江苏邑文微电子科技有限公司 | Combined sealing mechanism suitable for moving part in vacuum and semiconductor equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109812581A (en) | A kind of dry-grinding type combination sealing arrangement | |
| CA2503822A1 (en) | Radial shaft seal ring | |
| CN109681637A (en) | A kind of daul-side dry round gas seal for screw vacuum dry pump | |
| US20060290068A1 (en) | Radially assembled seal | |
| KR101367693B1 (en) | Seal assembly and rotary actuator containing such seal assembly | |
| CN210050296U (en) | Dry grinding type combined sealing device | |
| JP2010084802A (en) | Rotary seal | |
| US9939067B2 (en) | Elastic contact seal | |
| CN103542111B (en) | With the wafer type butterfly valve of reliable sealing anti-leak valve seat | |
| CN207333709U (en) | A kind of high pressure resistant spring energy-storage polymeric seal circle with micro- texture sealing lip | |
| CN209540042U (en) | Mechanical seal slides auxiliary seal ring baffle ring | |
| CN208397427U (en) | A kind of valve rod leak-proof structure | |
| CN207906445U (en) | A kind of stirred autoclave gland seal device | |
| JP6936321B2 (en) | Device for sealing objects | |
| CN202266676U (en) | Pump corrugated pipe dry gas seal device | |
| KR200484647Y1 (en) | pressure seal for swivel jonit | |
| CN104455448A (en) | Wide seal | |
| CN207634688U (en) | A kind of special seal with O ring component of actuator | |
| CN212717949U (en) | Polytetrafluoroethylene lantern ring | |
| CN208966690U (en) | A kind of mechanical seal of use on condensate pump | |
| CN201162715Y (en) | Mechanical seal for non-leakage pump | |
| CN214197238U (en) | Rotating shaft sealing structure | |
| CN108730521A (en) | Seal assembly | |
| CN213332380U (en) | Rotary metal corrugated pipe mechanical seal | |
| CN211667155U (en) | 212 explosion-proof type mechanical seal |
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 |