CN108397578B - Check valve for drainage device - Google Patents
Check valve for drainage device Download PDFInfo
- Publication number
- CN108397578B CN108397578B CN201710067752.3A CN201710067752A CN108397578B CN 108397578 B CN108397578 B CN 108397578B CN 201710067752 A CN201710067752 A CN 201710067752A CN 108397578 B CN108397578 B CN 108397578B
- Authority
- CN
- China
- Prior art keywords
- eccentric
- cavity
- water inlet
- limiting
- check ball
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 230000000670 limiting effect Effects 0.000 claims description 40
- 210000000078 claw Anatomy 0.000 claims description 34
- 230000004323 axial length Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a check valve for a drainage device, which comprises: the body is provided with an upper shell and a lower cover, and the lower cover is combined with the upper shell and forms a cavity inside; the eccentric structure is arranged in the cavity, and the eccentric structure forms an eccentric space by itself or matching with the inner wall of the cavity, and the eccentric space is communicated with the cavity; and a check ball which is freely movably accommodated in the eccentric space and has a diameter larger than the caliber of the first water inlet, so that the check ball is closely adhered to the edge of the first water inlet. The invention can reduce the noise.
Description
Technical Field
The present invention relates to a water discharge device, and more particularly, to a check valve for a water discharge device.
Background
In order to prevent the discharged condensed water from flowing back into the machine body, check valves are often arranged in the discharge pipelines in the air conditioner or the heating machine.
Referring now to WO2014035938, a diaphragm metering pump is provided, and as can be seen in fig. 2, the suction side (23) is connected to a source of fluid (28), the suction side (23) includes an inlet fitting (36), the inlet fitting (36) is connected to the inlet fitting having a check valve (38), and the check valve (38) has a valve seat (43) and a check ball (40).
Therefore, when fluid enters the valve seat, the check ball moves upwards and is fixed by the fixed claw structure, so that the check ball cannot shake too severely in the valve seat, the fluid passes through a gap between the check ball and an opening below the valve seat and enters the check valve, and then flows out of the check valve through a gap of the fixed claw; when the fluid stops entering, the check ball moves downwards to prop against the lower opening of the valve seat, so that the fluid flowing out of the check valve is prevented from flowing back into the lower opening, and the check effect is achieved.
However, as can be seen from the drawings, the above-mentioned fixing claws only contact the check ball to achieve the fixing effect of the check ball, in order to prevent the check ball from being loosened too much to generate noise during use, and thus, the movement space given to the check ball is quite limited. In view of this, since the movement space is relatively small after a long period of use, dirt is relatively easily accumulated between the check ball and each of the fixing claws and between the check ball and the valve seat, and thus the check effect is rather reduced. Therefore, the problem of dirt accumulation in the above-described check valve structure is to be improved.
Disclosure of Invention
The main object of the present invention is to provide a check valve for a drainage device, which can reduce noise.
Another main object of the present invention is to provide a check valve for a drain device, which can effectively reduce accumulation of dirt.
In order to achieve the above object, the present invention provides a check valve for a drainage device, comprising: the body is provided with an upper shell and a lower cover, the upper shell is provided with a first water outlet, the lower cover is provided with a first water inlet, the lower cover is combined with the upper shell and forms a cavity in the interior, and the cavity is respectively communicated with the first water outlet and the first water outlet; the eccentric structure is arranged in the cavity, and the eccentric structure forms an eccentric space by being matched with the inner wall of the cavity, and the eccentric space is communicated with the cavity; and a check ball which is freely movably accommodated in the eccentric space and has a diameter larger than the caliber of the first water inlet, so that the check ball can be closely adhered to the edge of the first water inlet.
Wherein: the eccentric structure consists of a plurality of limit claws and an annular seat piece, wherein the limit claws are annularly arranged, one end of each limit claw is gradually retracted to form an end part, the other end of each limit claw is expanded and then is connected with the annular seat piece in an extending mode, at least one limit claw of the plurality of limit claws is increased by a preset thickness towards the range enclosed by the plurality of limit claws and the annular seat piece, so that an eccentric space is formed, in addition, a second water outlet is formed between every two adjacent limit claws, and the eccentric space is communicated with the cavity through each second water outlet; the annular seat piece is internally provided with a second water inlet which is respectively communicated with the eccentric space and the first water inlet.
Wherein: at least one limiting part is arranged in the annular seat piece towards the second water inlet.
Wherein: the at least one limiting part is a plurality of protrusions protruding inwards from the annular seat piece, and the limiting parts are annularly arranged in a surrounding mode.
Wherein: the caliber of the first water inlet is smaller than the caliber surrounded by the limiting parts.
Wherein: each limit part is an inclined plane which extends downwards in the radial direction towards the axle center of the annular seat piece and is inclined.
Wherein: the end part forms a bump downwards from the bottom.
Wherein: the bump is spherical.
Wherein: the inner wall of the upper shell is provided with a downward shoulder surface, the outer edge of the annular seat piece extends to form an annular clamping part, and the lower cover is screwed on the shell, so that the annular clamping part is clamped between the shoulder surface and the lower cover.
Wherein: the eccentric structure is a cylinder, and the eccentric structure is radially increased by a preset thickness towards the inside of the cavity, and is arranged around the lower opening edge of the first water outlet, so that the eccentric structure is matched with the inner wall of the cavity to form the eccentric space.
Wherein: the water outlet is provided with a first support and a second support, wherein the first support and the second support are arranged around the lower opening edge of the first water outlet and are annularly arranged with the eccentric structure, the axial length of the eccentric structure is larger than that of the first support and the second support, and the axial length of the first support is larger than that of the second support.
Therefore, the invention can effectively reduce the noise by the eccentric space of the eccentric structure and the structural characteristic of the backstop ball.
In addition, the invention can be freely movably accommodated in the eccentric space by the check ball, so that the situation that dirt is accumulated between the check ball and the plurality of limit claws and between the check ball and the annular seat piece can be effectively reduced.
The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.
Drawings
Fig. 1 is a perspective view of a first preferred embodiment of the present invention.
Fig. 2 is an exploded view of a first preferred embodiment of the present invention.
FIG. 3 is a partially exploded view of a first preferred embodiment of the present invention; showing the bottom state of the eccentric structure.
Fig. 4 is a top view of a first preferred embodiment of the present invention.
Fig. 5 is a cross-sectional view taken along line 5-5 of fig. 4.
Fig. 6 is a schematic view illustrating a usage state of the first preferred embodiment of the present invention.
Fig. 7 is a side view of a second preferred embodiment of the present invention.
Fig. 8 is a cross-sectional view taken along line 8-8 of fig. 7.
FIG. 9 is a cross-sectional view taken along line 9-9 of FIG. 8; the axial length of the first leg is shown to be greater than the axial length of the second leg.
FIG. 10 is a cross-sectional view taken along section line 10-10 of FIG. 8; showing the state of the eccentric structure and the first support post.
FIG. 11 is a schematic view illustrating a usage state of a second embodiment of the present invention; the check ball is shown moving in the eccentric space.
FIG. 12 is a schematic view showing a usage state according to another view angle of the second preferred embodiment of the present invention; the check ball is shown in a state of abutting against the second support from the first support.
Wherein, the reference numerals:
10. check valve for drainage device
11. First water outlet of upper shell 131 of body 13
133. First water inlet of lower cover 151 of shoulder 15
17. Cavity 21 eccentric structure 23 limit claw
231. Second water outlet 235 bump of end 233
25. Limiting part of second water inlet 253 of annular seat piece 251
255. Non-return ball with eccentric space 31 of annular clamping part 27
W fluid
Check valve for 10' drainage device
131' first water outlet 17' chamber 21' eccentric structure
27' eccentric space 31' check ball 42' first pillar
43 'second leg W' fluid
Detailed Description
For the purpose of illustrating the technical features of the present invention in detail, a first preferred embodiment is described below with reference to the accompanying drawings, in which:
as shown in fig. 1 to 5, a check valve 10 for a drainage device according to a first preferred embodiment of the present invention mainly comprises a main body 11, an eccentric structure 21 and a check ball 31, wherein:
the main body 11 has an upper housing 13 and a lower cover 15, the upper housing 13 has a first water outlet 131, the lower cover 15 has a first water inlet 151, the lower cover 15 is combined with the upper housing 13 and forms a chamber 17 therein, and the chamber 17 is respectively communicated with the first water inlet 151 and the first water outlet 131.
The eccentric structure 21 is disposed in the chamber 17, the eccentric structure 21 itself forms an eccentric space 27, and the eccentric space 27 communicates with the chamber 17.
The check ball 31 is movably accommodated in the eccentric space 27, and the diameter of the check ball 31 is larger than the diameter of the first water inlet 151, and the check ball 31 can be closely adhered to the edge of the first water inlet 151.
In the first preferred embodiment, the eccentric structure 21 is composed of a plurality of limiting claws 23 and an annular seat 25, the limiting claws 23 are annularly arranged, one ends of the limiting claws 23 are gradually retracted to form an end 231, the other ends of the limiting claws 23 are expanded and then are connected to the annular seat 25 in an extending manner, at least one limiting claw 23 of the plurality of limiting claws 23 is increased by a predetermined thickness towards the range enclosed by the plurality of limiting claws 23 and the annular seat 25, thereby forming the eccentric space 27, in addition, a second water outlet 233 is formed between every two adjacent limiting claws 23, and the eccentric space 27 is communicated with the cavity 17 through each second water outlet 233. Moreover, the inside of the annular seat piece 25 is a second water inlet 251, the second water inlet 251 is respectively communicated with the eccentric space 27 and the first water inlet 151, and at least one limiting part 253 is arranged in the annular seat piece 25 towards the second water inlet 251. In the first preferred embodiment, the substantial number of the at least one limiting pawl 23 is exemplified by one, and it is intended to mainly achieve an eccentric effect on the moving path in the eccentric space 27, so that the changing of the number of the radially extending limiting pawl 23 and the changing of the eccentric effect on the moving path should be all the matters of the present invention.
In the first preferred embodiment, the number of the at least one limiting portion 253 is three, each limiting portion 253 protrudes inward from the annular seat 25, and the plurality of limiting portions 253 are annularly arranged around the annular seat 25; the caliber of the first water inlet 151 is smaller than the caliber surrounded by the plurality of limiting parts 253, and the main purpose of the first water inlet 151 is to limit the check ball 31 in the eccentric space 27 by the plurality of limiting parts 253 so as not to drop out; and each of the limiting portions 253 extends radially and downwardly towards the axis of the annular seat 25 to form an inclined surface, so as to provide a more stable limiting effect on the check ball 31.
In addition, in the first preferred embodiment, the inner wall of the upper housing 13 has a downward shoulder 133, and the outer edge of the annular seat 25 extends an annular clamping portion 255, and the lower cover 15 is screwed to the upper housing 13, such that the annular clamping portion 255 is clamped between the shoulder 133 and the lower cover 15; therefore, the present invention can ensure that the space communicated with the first water inlet 151, the second water inlet 251, the eccentric space 27, the plurality of second water outlets 233, the chamber 17 and the first water outlet 131 is not communicated with the outside of the rest space.
The structure of the first preferred embodiment of the present invention is described above, and then, the use state of the first preferred embodiment of the present invention is described below.
Referring to fig. 6 and fig. 5, when the present invention is not in use, the check ball 31 abuts against each boss 253 and the portion of the check ball 31 exposed is abutted against the first water inlet 151, so that the first water inlet 151 is not communicated with the second water inlet 251.
When the present invention is used, a fluid W enters from the first water inlet 151, and when the hydraulic pressure is enough to push the check ball 31, the check ball 31 starts to move upwards, at this time, the first water inlet 151 and the second water inlet 251 are changed from non-communication to communication, and the fluid W flows through the second water inlet 251, the eccentric space 27, the plurality of second water outlets 233, the chamber 17 and the first water outlet 131 after entering the second water inlet 251, and the fluid W is discharged. When the fluid W stops flowing into the first water inlet 151, the check ball 31 starts to move downward to return to a state of abutting against the first water inlet 151 due to a shortage of hydraulic pressure.
Because one of the limiting claws 23 of the present invention increases the predetermined thickness, the distance that the non-return ball 31 can move left and right in the eccentric space 27 is limited due to the influence of the limiting claw 23 in the upward movement process of the non-return ball 31, and the impact force of the fluid W is reduced by the predetermined thickness that the non-return ball 31 also extends radially from the limiting claw 23 in the eccentric space 27, so that the shaking of the non-return ball 31 in the eccentric space 27 is softer, thereby reducing the generation of noise.
Accordingly, the invention can reduce noise by means of the structural feature that one of the limiting claws 23 radially increases the predetermined thickness toward the inside of the accommodating space.
In addition, the present invention can be freely movably accommodated in the eccentric space 27 by the check ball 31, so that the occurrence of the situation that dirt is accumulated between the check ball 31 and the plurality of limiting pawls 23 and between the check ball 31 and the annular seat 25 can be effectively reduced.
It should be noted that the end 231 has a bump 235 formed downward from the bottom, and the bump 235 has a spherical shape. Since the check ball 31 abuts against the bump 235, the spherical surface of the check ball 31 does not completely abut against the end 231, so that the fluid W does not generate excessive suction force between the check ball 31 and the end 231, and the check ball 31 does not generate a condition that the first water inlet 151 should be reset and attached, but not reset and attached, due to the suction force therebetween.
Next, referring to fig. 7 to 10, a second preferred embodiment of the present invention provides a check valve 10' for a drainage device, which is mainly similar to the first preferred embodiment, and is different from the first preferred embodiment in that:
the eccentric structure 21' is a cylinder, and the eccentric structure 21' radially increases a predetermined thickness toward the inside of the chamber 17', and the eccentric structure 21' is disposed around the lower opening edge of the first water outlet 131', thereby forming the eccentric space 27' in cooperation with the inner wall of the chamber 17 '.
In the second preferred embodiment, the first and second support columns 42' and 43' are disposed around the lower opening edge of the first water outlet 131', and are annularly arranged with the eccentric structure 21', and the axial length of the eccentric structure 21' is greater than that of the first and second support columns 42' and 43', and the axial length of the first support column 42' is greater than that of the second support column 43 '. Therefore, when the check ball 31 'moves upwards, the check ball contacts the first support post 42' and is biased against the second support post 43', so that the check ball 31' can be positioned and the excessive shaking of the check ball 31 'in the eccentric space 27' can be reduced to generate noise.
In use, referring to fig. 11 and 12, when the check ball 31' is pushed by the fluid W ', the eccentric structure 21' increases a predetermined thickness radially toward the chamber 17', so that the check ball 31' moves eccentrically along the eccentric space 27', and then, the axial length of the first pillar 42' is greater than that of the second pillar 43', so that the check ball 31' contacts the first pillar 42' and then deflects a predetermined path toward the second pillar 43' to strengthen the fixation of the check ball 31' and effectively reduce noise generated by the check ball 31 '. The remaining structures and effects of the second preferred embodiment are the same as those of the first preferred embodiment, and will not be described in detail.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A non-return valve for a drain apparatus, comprising:
the body is provided with an upper shell and a lower cover, the upper shell is provided with a first water outlet, the lower cover is provided with a first water inlet, the lower cover is combined with the upper shell and forms a cavity in the interior, and the cavity is respectively communicated with the first water inlet and the first water outlet;
the eccentric structure is arranged in the cavity, the eccentric structure is self or matched with the inner wall of the cavity to form an eccentric space, the eccentric space is communicated with the cavity, the eccentric structure is formed by a plurality of limiting claws and an annular seat piece, the limiting claws are annularly arranged, one end of each limiting claw is gradually retracted to form an end part, the other end of each limiting claw is expanded and then connected with the annular seat piece in an extending mode, at least one limiting claw of the plurality of limiting claws is increased by a preset thickness towards the range enclosed by the plurality of limiting claws and the annular seat piece, so that the eccentric space is formed, in addition, a second water outlet is formed between every two adjacent limiting claws, and the eccentric space is communicated with the cavity through each second water outlet; the inside of the annular seat piece is provided with a second water inlet which is respectively communicated with the eccentric space and the first water inlet; and
and the check ball can be freely movably accommodated in the eccentric space, and the diameter of the check ball is larger than the caliber of the first water inlet, so that the check ball can be closely adhered to the edge of the first water inlet.
2. A non-return valve for a drain according to claim 1, wherein: at least one limiting part is arranged in the annular seat piece towards the second water inlet.
3. A non-return valve for a drain according to claim 2, wherein: the at least one limiting part is a plurality of protrusions protruding inwards from the annular seat piece, and the limiting parts are annularly arranged in a surrounding mode.
4. A non-return valve for a drain according to claim 3, wherein: the caliber of the first water inlet is smaller than the caliber surrounded by the limiting parts.
5. The check valve for a drain device according to claim 4, wherein: each limit part is an inclined plane which extends downwards in the radial direction towards the axle center of the annular seat piece and is inclined.
6. The check valve for a drain device according to claim 5, wherein: the end part forms a bump downwards from the bottom.
7. The check valve for a drain device according to claim 6, wherein: the bump is spherical.
8. A non-return valve for a drain according to claim 1, wherein: the inner wall of the upper shell is provided with a downward shoulder surface, the outer edge of the annular seat piece extends to form an annular clamping part, and the lower cover is screwed on the upper shell, so that the annular clamping part is clamped between the shoulder surface and the lower cover.
9. A non-return valve for a drain apparatus, comprising:
the body is provided with an upper shell and a lower cover, the upper shell is provided with a first water outlet, the lower cover is provided with a first water inlet, the lower cover is combined with the upper shell and forms a cavity in the interior, and the cavity is respectively communicated with the first water inlet and the first water outlet;
the eccentric structure is arranged in the cavity, the eccentric structure itself or the inner wall of the cavity is matched to form an eccentric space, the eccentric space is communicated with the cavity, the eccentric structure is a column body, the eccentric structure radially increases a preset thickness towards the inside of the cavity, and the eccentric structure is arranged around the lower opening edge of the first water outlet, so that the eccentric space is formed by the inner wall of the cavity; and
and the check ball can be freely movably accommodated in the eccentric space, and the diameter of the check ball is larger than the caliber of the first water inlet, so that the check ball can be closely adhered to the edge of the first water inlet.
10. A non-return valve for a drain according to claim 9, wherein: the water outlet is provided with a first support and a second support, wherein the first support and the second support are arranged around the lower opening edge of the first water outlet and are annularly arranged with the eccentric structure, the axial length of the eccentric structure is larger than that of the first support and the second support, and the axial length of the first support is larger than that of the second support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710067752.3A CN108397578B (en) | 2017-02-07 | 2017-02-07 | Check valve for drainage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710067752.3A CN108397578B (en) | 2017-02-07 | 2017-02-07 | Check valve for drainage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108397578A CN108397578A (en) | 2018-08-14 |
| CN108397578B true CN108397578B (en) | 2024-02-13 |
Family
ID=63094093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710067752.3A Active CN108397578B (en) | 2017-02-07 | 2017-02-07 | Check valve for drainage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108397578B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2592593A (en) * | 2020-03-02 | 2021-09-08 | Ems Industrial Holdings Ltd | A valve and a pump system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2791403Y (en) * | 2005-03-15 | 2006-06-28 | 深圳成霖洁具股份有限公司 | Single non-return device suitable to flow pipeline |
| TW201604454A (en) * | 2014-07-17 | 2016-02-01 | 小金井股份有限公司 | Check valve and liquid supply apparatus provided with check valve |
| CN206468852U (en) * | 2017-02-07 | 2017-09-05 | 东莞市东坑合利美电子电器有限公司 | The non-return valve of drainage arrangement |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5549005B2 (en) * | 2009-03-31 | 2014-07-16 | 旭有機材工業株式会社 | Ball check valve |
-
2017
- 2017-02-07 CN CN201710067752.3A patent/CN108397578B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2791403Y (en) * | 2005-03-15 | 2006-06-28 | 深圳成霖洁具股份有限公司 | Single non-return device suitable to flow pipeline |
| TW201604454A (en) * | 2014-07-17 | 2016-02-01 | 小金井股份有限公司 | Check valve and liquid supply apparatus provided with check valve |
| CN206468852U (en) * | 2017-02-07 | 2017-09-05 | 东莞市东坑合利美电子电器有限公司 | The non-return valve of drainage arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108397578A (en) | 2018-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2557179C (en) | Flow control valve | |
| KR200204744Y1 (en) | Waterproof mechanism for emulsion dispensing pump | |
| US20080292473A1 (en) | High-Pressure Pump For Feeding Fuel To An Internal Combustion Engine | |
| CA2491953A1 (en) | A lance with swinging head for high pressure cleaning equipments | |
| WO2006039496A3 (en) | Dome check valve | |
| CN108397578B (en) | Check valve for drainage device | |
| JP6566486B2 (en) | High pressure fuel pump | |
| JP6302735B2 (en) | Relief valve | |
| US6957669B2 (en) | Hydraulic accumulator | |
| US7419135B2 (en) | Quick connector | |
| JP4708502B1 (en) | shower head | |
| Park et al. | 2012 | |
| KR100567142B1 (en) | Connecting pipe | |
| KR20120029892A (en) | Air damping mount | |
| US8267112B2 (en) | Automatic water distributor | |
| US6484744B1 (en) | Oil pumping device | |
| CN111099145A (en) | Back suction emulsion pump | |
| TWI635230B (en) | Check valve for drain | |
| KR20190000688U (en) | Tandem automatic drain device in use both as Differential pressure type and Flot type for Comprssed air filter | |
| CN108223833B (en) | 150MPa ultrahigh pressure fluid pressure regulating valve | |
| KR101254266B1 (en) | A filter cartridge | |
| CN112982581A (en) | Bent pipe and drain pipe structure | |
| CN1732048A (en) | Tappet pump, mainly for cosmetic products | |
| KR20170121654A (en) | Automatic pressure control valve of power sprayer | |
| WO2016088679A1 (en) | Storage tank |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |