CN108799252B - Hydraulic cylinder with adjustable bidirectional buffering speed - Google Patents
Hydraulic cylinder with adjustable bidirectional buffering speed Download PDFInfo
- Publication number
- CN108799252B CN108799252B CN201810887418.7A CN201810887418A CN108799252B CN 108799252 B CN108799252 B CN 108799252B CN 201810887418 A CN201810887418 A CN 201810887418A CN 108799252 B CN108799252 B CN 108799252B
- Authority
- CN
- China
- Prior art keywords
- piston
- piston rod
- cylinder
- hole
- way valve
- 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
- 230000003139 buffering effect Effects 0.000 title claims abstract description 16
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 10
- 239000003921 oil Substances 0.000 claims abstract description 41
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 6
- 230000008719 thickening Effects 0.000 claims abstract 4
- 239000007788 liquid Substances 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/222—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which throttles the main fluid outlet as the piston approaches its end position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a bidirectional buffer speed-adjustable hydraulic cylinder, belonging to the field of hydraulic cylinders; the technical problem to be solved is to provide the hydraulic oil cylinder which does not change the shape of the oil cylinder, does not increase the volume and the installation space of the oil cylinder, has a simple structure and can realize the bidirectional buffering speed adjustment; the technical scheme adopted for solving the technical problems is as follows: the hydraulic cylinder with the adjustable bidirectional buffering speed comprises a cylinder body, a piston and a piston rod are arranged in the cylinder body, a throttle channel is arranged on one side, opposite to the piston rod, of the piston, a first one-way valve is arranged in the middle of the piston, the first one-way valve is connected with an oil inlet of a rodless cavity, a rod cavity oil inlet and a second one-way valve are arranged at the rear end of the piston rod, a thickening section is arranged on the piston rod, an oil drain groove is arranged on the thickening section, the piston rod is controlled to stretch out and recover through the one-way valve, and the stretching and recovering speeds are controlled through the throttle channel and the oil drain groove; the invention can be widely applied to the field of hydraulic cylinders.
Description
Technical Field
The invention discloses a bidirectional buffering speed-adjustable hydraulic cylinder, and belongs to the technical field of hydraulic cylinders.
Background
If the speed of the working mechanism driven by the hydraulic actuator cylinder is higher or the holding capacity is larger, mechanical collision can be caused when the hydraulic actuator cylinder is stopped or commutated suddenly, great vibration impact and noise are generated, extra damage is brought to the whole mechanical equipment, the mechanical life is reduced, the environmental pollution is also increased, and in order to reduce or eliminate the impact, the cylinder needs to take certain measures at the stroke end to realize the speed decrease until the speed is zero.
The methods commonly used at present are as follows: through the design of a hydraulic system, a buffer loop is added on an oil way, and a sensor is added on an oil cylinder to realize buffering; through setting up rectangle or triangle-shaped buffering slot at hydro-cylinder withdrawal stroke end, set up corresponding boss at piston rodless chamber terminal surface and realize buffering, this kind of buffering is restricted by the structure, can only realize withdrawing one end buffering, increases the buffer structure of check valve, adopts the external structural style of check valve generally, changes hydro-cylinder tradition structure like this, increases the tank cylinder volume, increases hydro-cylinder installation space.
Disclosure of Invention
The hydraulic cylinder overcomes the defects in the prior art, does not change the appearance of the cylinder, does not increase the volume and the installation space of the cylinder body, has a simple structure, and can realize the bidirectional buffering speed adjustment.
In order to solve the technical problems, the invention adopts the following technical scheme: the hydraulic cylinder with the adjustable bidirectional buffering speed comprises a cylinder body, wherein one end of the cylinder body is provided with a cylinder bottom, the other end of the cylinder body is provided with a cylinder cover, a piston and a piston rod connected with the piston are arranged in the cylinder body, one end of the piston is opposite to the cylinder bottom to form a rodless cavity, the other end of the piston is connected with the piston rod to form a rod cavity in the cylinder body, a piston concave hole is formed in one side of the piston opposite to the cylinder bottom, a cylinder bottom concave hole corresponding to the piston concave hole is formed in one side of the cylinder bottom opposite to the piston, a first one-way valve is arranged in the cylinder bottom concave hole, a first liquid inlet is formed in the cylinder bottom, the first liquid inlet is connected with the first one-way valve, a throttling passage is formed around the piston concave hole in one side of the piston opposite to the cylinder bottom, and the throttling passage is communicated with the inner wall of the piston concave hole;
the cylinder cover is provided with a second liquid inlet, a second one-way valve is arranged in the cylinder cover relative to the cylinder body, and the second liquid inlet is connected with the second one-way valve;
the diameter of a section of the piston rod, which is close to the piston, is larger than that of a section of the piston rod, which is far away from the piston, and an oil drain groove is formed in the outer wall of the section of the piston rod, which is close to the piston;
the first one-way valve is externally provided with a sleeve, and an oil drain port is arranged on the sleeve.
The middle part of the cylinder cover is provided with a through hole, and the inner diameter of the through hole is the same as the diameter of a section of the piston rod, which is close to the piston.
The throttling passage comprises a first vertical hole perpendicular to the inner wall of the concave hole of the piston and a first transverse hole perpendicular to the first vertical hole and parallel to the concave hole of the piston, and the first transverse hole is communicated with the rodless cavity and the concave hole of the piston.
The piston rod is connected with the piston in a welding mode.
The second check valve and the through hole parallel arrangement in cylinder cap middle part, the second inlet include the second vertical hole of perpendicular intercommunication through-hole, second vertical hole middle part is provided with the second cross bore, the second cross bore links to each other with the second check valve.
The cylinder bottom, the sleeve, the first one-way valve, the cylinder body, the piston rod and the cylinder cover are coaxially arranged.
A sealing device is arranged between the cylinder bottom and the cylinder body.
Compared with the prior art, the invention has the following beneficial effects: the hydraulic oil cylinder has the advantages of no additional equipment, no change of functions of an original hydraulic oil cylinder supply system, no change of the appearance of the hydraulic oil cylinder, strong applicability, wide application range, simple structure, convenient manufacture and good manufacturability, and can meet the requirements of different loads and different speeds by changing the structure of a piston and adding a one-way valve.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the structure of the piston and the piston rod of the present invention.
In the figure, a cylinder body 1, a cylinder bottom 2, a cylinder cover 3, a piston 4, a piston rod 5, a first one-way valve 6, a first liquid inlet 7, a second liquid inlet 8, a second one-way valve 9, a sleeve 10, an oil drain port 11 and a throttling passage 12 are arranged.
Detailed Description
As shown in fig. 1 and 2, the hydraulic cylinder with adjustable bidirectional buffering speed comprises a cylinder body 1, one end of the cylinder body 1 is provided with a cylinder bottom 2, the other end of the cylinder body is provided with a cylinder cover 3, a piston 4 and a piston rod 5 connected with the piston 4 are arranged in the cylinder body, one end of the piston 4 and the cylinder bottom 2 are opposite to each other to form a rodless cavity, the other end of the piston 4 and the piston rod 5 are connected in the cylinder body 1 to form a rod cavity, a piston concave hole is formed in one side of the piston 4 opposite to the cylinder bottom 2, one side of the cylinder bottom 2 opposite to the piston 4 is provided with a cylinder bottom concave hole corresponding to the piston concave hole, a first check valve 6 is arranged in the cylinder bottom concave hole, a first liquid inlet 7 is arranged on the cylinder bottom 2, the first liquid inlet 7 is connected with the first check valve 6, one side of the piston 4 opposite to the cylinder bottom 2 surrounds the piston concave hole to form a throttling passage 12, and the throttling passage 12 is communicated with the inner wall of the piston concave hole; the cylinder cover 3 is provided with a second liquid inlet 8, a second one-way valve 9 is arranged in the cylinder cover 3 relative to the cylinder body 1, and the second liquid inlet 8 is connected with the second one-way valve 9; the diameter of the section of the piston rod 5 close to the piston 4 is larger than that of the section far from the piston 4; the first check valve 6 is provided with sleeve 10 outward, is provided with oil drain 11 on the sleeve 10, and cylinder cap 3 middle part is provided with the through-hole, the through-hole internal diameter is the same with the diameter that piston rod 5 is close to piston 4 one section, and throttle passageway 12 includes the first perpendicular hole of perpendicular to piston shrinkage pool inner wall and is on a parallel with the first transverse hole of piston shrinkage pool perpendicularly with first perpendicular hole, and first transverse hole intercommunication rodless chamber and piston shrinkage pool, and piston rod 5 is connected through welded mode with piston 4, the through-hole parallel arrangement at second check valve 9 and cylinder cap 3 middle part, second inlet 8 include the second perpendicular hole of perpendicular intercommunication through-hole, second perpendicular hole middle part is provided with the second transverse hole, and the second transverse hole links to each other with second check valve 9, cylinder bottom 2, sleeve 10, first check valve 6, cylinder body 1, piston 4, piston rod 5, cylinder cap 3 coaxial arrangement are provided with sealing device between cylinder bottom 2 and the cylinder body 1.
When the piston rod needs to extend, the first liquid inlet is used for feeding oil, the first one-way valve is opened, oil flows into the concave hole of the piston through the first one-way valve, then enters the rodless cavity along the throttling passage, the piston rod is pushed to extend, meanwhile, the second one-way valve is closed, oil in the rod cavity flows out of the second liquid inlet along the inner hole of the cylinder cover, when the thickened part of the piston rod enters the inner hole of the cylinder cover, the hydraulic oil outlet flow passage is blocked, the oil flows into the second liquid inlet from the oil drain groove and the hole gap of the thickened part of the piston rod, the oil output is reduced, the oil pressure of the rod cavity is increased, and the extending speed of the piston rod is slowed down; when the piston rod needs to be recovered, the second liquid inlet is filled with oil, the second one-way valve is opened, oil enters the rod cavity through the second one-way valve and the oil drain groove on the piston rod, the piston rod is pushed to start to be recovered, meanwhile, the first one-way valve is closed, oil in the rodless cavity flows to the first liquid inlet from the throttling passage and the oil drain hole on the sleeve, the piston rod is recovered at a normal speed, when the piston rod is recovered to the tail of the stroke, the oil outflow passage of the rodless cavity is blocked, and the recovery speed of the piston rod is reduced.
The speed of the piston rod extending out of the buffer section can be controlled by the width and the number of the oil draining grooves, the oil draining grooves are wide, the number of the oil draining grooves is large, the piston rod extending out is fast, and the speed of the piston rod retracting out of the buffer section is slow, and the speed of the piston rod retracting out of the buffer section is controlled by the throttle passage.
The invention does not change the function of the oil supply system of the oil cylinder, does not change the appearance of the oil cylinder, and has simple device, convenient use and strong applicability.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (4)
1. The utility model provides a bidirectional buffer speed adjustable hydraulic cylinder, includes cylinder body (1), and cylinder body (1) one end is provided with cylinder bottom (2), and the other end is provided with cylinder cap (3), and inside is provided with piston (4) and piston rod (5) that link to each other with piston (4), and piston (4) one end and cylinder bottom (2) are relative to form no pole chamber, and the piston (4) other end links to each other with piston rod (5) and is formed with the pole chamber in cylinder body (1), its characterized in that: a piston concave hole is formed in one side, opposite to the cylinder bottom (2), of the piston (4), a cylinder bottom concave hole corresponding to the piston concave hole is formed in one side, opposite to the piston (4), of the cylinder bottom (2), a first one-way valve (6) is arranged in the cylinder bottom concave hole, a first liquid inlet (7) is formed in the cylinder bottom (2), the first liquid inlet (7) is connected with the first one-way valve (6), a throttling passage (12) is arranged around the piston concave hole on one side, opposite to the cylinder bottom (2), of the piston (4), and the throttling passage (12) is communicated with the inner wall of the piston concave hole;
the cylinder cover (3) is provided with a second liquid inlet (8), a second one-way valve (9) is arranged in the cylinder cover (3) opposite to the cylinder body (1), and the second liquid inlet (8) is connected with the second one-way valve (9);
the diameter of a section of the piston rod (5) close to the piston (4) is larger than that of a section of the piston rod (4), and an oil drain groove is formed in the outer wall of a section of the piston rod (5) close to the piston (4);
a sleeve (10) is arranged outside the first one-way valve (6), and an oil drain port (11) is arranged on the sleeve (10); the middle part of the cylinder cover (3) is provided with a through hole, and the inner diameter of the through hole is the same as the diameter of a section of the piston rod (5) close to the piston (4);
the throttling passage (12) comprises a first vertical hole perpendicular to the inner wall of the concave hole of the piston and a first transverse hole perpendicular to the first vertical hole and parallel to the concave hole of the piston, and the first transverse hole is communicated with the rodless cavity and the concave hole of the piston;
the second one-way valve (9) is arranged in parallel with the through hole in the middle of the cylinder cover (3), the second liquid inlet (8) comprises a second vertical hole which is vertically communicated with the through hole, a second transverse hole is arranged in the middle of the second vertical hole, and the second transverse hole is connected with the second one-way valve (9);
when the piston rod (5) needs to extend, the first liquid inlet (7) is filled with oil, the first one-way valve (6) is opened, oil flows into a piston concave hole through the first one-way valve (6), then enters a rodless cavity along a throttling passage (12), the piston rod (5) is pushed to extend, meanwhile, the second one-way valve (9) is closed, oil in the rod cavity flows out along an inner hole of the cylinder cover to the second liquid inlet (8), when a thickening part of the piston rod (5) enters the inner hole of the cylinder cover, a hydraulic oil outlet flow channel is blocked, oil flows into the second liquid inlet (8) from an oil drain groove and a hole gap of the thickening part of the piston rod (5), the oil output is reduced, the oil pressure of the rod cavity is increased, and the extending speed of the piston rod (5) is slowed down; when piston rod (5) need retrieve, second inlet (8) advances oil, and second check valve (9) are opened, and fluid gets into there is the pole chamber through the drain groove on second check valve (9) and piston rod (5), promotes piston rod (5) and begins to withdraw, and first check valve (6) are closed simultaneously, and rodless chamber fluid flows to first inlet (7) from drain port (11) on throttle passageway (12) and sleeve (10), and piston rod (5) are retrieved according to normal speed, and when piston rod (5) retrieve the stroke afterbody, rodless chamber fluid outflow passageway is blocked, and piston rod (5) retrieve speed and slow down.
2. The bi-directional buffering rate adjustable hydraulic ram of claim 1, wherein: the piston rod (5) is connected with the piston (4) in a welding mode.
3. The bi-directional buffering rate adjustable hydraulic ram of claim 1, wherein: the cylinder bottom (2), the sleeve (10), the first one-way valve (6), the cylinder body (1), the piston (4), the piston rod (5) and the cylinder cover (3) are coaxially arranged.
4. The bi-directional buffering rate adjustable hydraulic ram of claim 1, wherein: a sealing device is arranged between the cylinder bottom (2) and the cylinder body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810887418.7A CN108799252B (en) | 2018-08-06 | 2018-08-06 | Hydraulic cylinder with adjustable bidirectional buffering speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810887418.7A CN108799252B (en) | 2018-08-06 | 2018-08-06 | Hydraulic cylinder with adjustable bidirectional buffering speed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108799252A CN108799252A (en) | 2018-11-13 |
| CN108799252B true CN108799252B (en) | 2024-04-16 |
Family
ID=64079346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810887418.7A Active CN108799252B (en) | 2018-08-06 | 2018-08-06 | Hydraulic cylinder with adjustable bidirectional buffering speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108799252B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469558B (en) * | 2019-09-18 | 2024-06-21 | 三一汽车起重机械有限公司 | Centering oil cylinder with bidirectional buffering function and crane |
| CN112594245B (en) * | 2020-11-24 | 2022-06-28 | 中国人民解放军96901部队24分队 | Bidirectional buffer hydraulic cylinder |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19637291A1 (en) * | 1995-11-02 | 1997-05-07 | Festo Kg | Device for end position damping of piston of pneumatic work cylinder |
| CN201991879U (en) * | 2011-04-20 | 2011-09-28 | 江苏技术师范学院 | Hydraulic cylinder buffering device |
| CN202560686U (en) * | 2012-05-29 | 2012-11-28 | 常州海宏液压设备有限公司 | Long-stroke buffering cylinder |
| CN203161708U (en) * | 2013-01-21 | 2013-08-28 | 三一汽车制造有限公司 | Buffering hydraulic oil cylinder |
| CN103438050A (en) * | 2013-09-02 | 2013-12-11 | 山西北方机械制造有限责任公司 | Buffer-after-unloading oil cylinder device |
| CN103939419A (en) * | 2013-09-30 | 2014-07-23 | 湖北江山液压科技有限公司 | Hydraulic cylinder constant throttling adjustable buffering device |
| CN104595281A (en) * | 2015-01-21 | 2015-05-06 | 柳州柳工液压件有限公司 | Cushion cylinder |
| CN105673615A (en) * | 2016-03-02 | 2016-06-15 | 庆安集团有限公司 | Actuating cylinder with buffer devices at two ends |
| CN208719061U (en) * | 2018-08-06 | 2019-04-09 | 山西航天清华装备有限责任公司 | A kind of adjustable hydraulic cylinder of bidirectional buffering speed |
-
2018
- 2018-08-06 CN CN201810887418.7A patent/CN108799252B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19637291A1 (en) * | 1995-11-02 | 1997-05-07 | Festo Kg | Device for end position damping of piston of pneumatic work cylinder |
| CN201991879U (en) * | 2011-04-20 | 2011-09-28 | 江苏技术师范学院 | Hydraulic cylinder buffering device |
| CN202560686U (en) * | 2012-05-29 | 2012-11-28 | 常州海宏液压设备有限公司 | Long-stroke buffering cylinder |
| CN203161708U (en) * | 2013-01-21 | 2013-08-28 | 三一汽车制造有限公司 | Buffering hydraulic oil cylinder |
| CN103438050A (en) * | 2013-09-02 | 2013-12-11 | 山西北方机械制造有限责任公司 | Buffer-after-unloading oil cylinder device |
| CN103939419A (en) * | 2013-09-30 | 2014-07-23 | 湖北江山液压科技有限公司 | Hydraulic cylinder constant throttling adjustable buffering device |
| CN104595281A (en) * | 2015-01-21 | 2015-05-06 | 柳州柳工液压件有限公司 | Cushion cylinder |
| CN105673615A (en) * | 2016-03-02 | 2016-06-15 | 庆安集团有限公司 | Actuating cylinder with buffer devices at two ends |
| CN208719061U (en) * | 2018-08-06 | 2019-04-09 | 山西航天清华装备有限责任公司 | A kind of adjustable hydraulic cylinder of bidirectional buffering speed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108799252A (en) | 2018-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204061372U (en) | A kind of oil hydraulic cylinder quick-expansion control loop | |
| CN108799252B (en) | Hydraulic cylinder with adjustable bidirectional buffering speed | |
| CN108105192B (en) | A kind of buffer-braking valve | |
| CN100441885C (en) | Hydraulic balance valve capable of automatically adapting load change | |
| CN104989764A (en) | Hole type viscous damper with hole length capable of being automatically adjusted | |
| CN201915433U (en) | Hydraulic regeneration system for diggers | |
| CN203362664U (en) | Synchronous oil cylinder | |
| CN104455548A (en) | Oil regenerating valve and working method thereof | |
| CN203685751U (en) | Three-stage constant thrust hydraulic oil cylinder | |
| CN109026889A (en) | Buffer overflow valve | |
| CN204852134U (en) | Hole formula viscous damper of kong changke self -adjusting | |
| CN208719061U (en) | A kind of adjustable hydraulic cylinder of bidirectional buffering speed | |
| CN213270523U (en) | Hydraulic limiting type multi-stage oil cylinder | |
| CN109058208A (en) | A kind of buffer overflow valve | |
| CN214998581U (en) | Secondary hydraulic cylinder with buffering function | |
| CN209892544U (en) | Double-oil-cylinder continuous sequential telescopic device and two-stage telescopic arm | |
| CN206478155U (en) | The all-hydraulic folding and unfolding shock mitigation system of amphibious vehicle wheel | |
| CN209129963U (en) | Oil cylinder with floating buffer structure | |
| CN209704972U (en) | Three oil pocket energy-conserving hydraulic cylinders | |
| CN208764019U (en) | A kind of interlayer makees the two-action multi-stage cylinder of oil supply gallery | |
| CN214996966U (en) | Quick hydraulic hoist | |
| CN208417126U (en) | Clamping cylinder | |
| CN207864505U (en) | A kind of two-way damping-adjustable shock-absorber for four-wheel all-terrain vehicle | |
| CN206785770U (en) | A kind of order hydraulic cylinder group | |
| CN204372229U (en) | A kind of fluid regeneration valve |
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 |