CN113586533A - Hydraulic energy storage device of oil press - Google Patents
Hydraulic energy storage device of oil press Download PDFInfo
- Publication number
- CN113586533A CN113586533A CN202010359840.2A CN202010359840A CN113586533A CN 113586533 A CN113586533 A CN 113586533A CN 202010359840 A CN202010359840 A CN 202010359840A CN 113586533 A CN113586533 A CN 113586533A
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- China
- Prior art keywords
- oil
- energy storage
- hydraulic
- stirring
- welded
- 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
- 238000004146 energy storage Methods 0.000 title claims abstract description 46
- 238000003756 stirring Methods 0.000 claims abstract description 58
- 238000003825 pressing Methods 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 abstract description 67
- 239000010720 hydraulic oil Substances 0.000 abstract description 41
- 238000001914 filtration Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/615—Filtering means
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/625—Accumulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The invention belongs to the technical field of hydraulic energy storage equipment, in particular to a hydraulic energy storage device of an oil press, which comprises a box body, wherein a first oil pump is welded on the inner wall of the bottom of the box body, an oil pumping pipe of the first oil pump extends out of the box body and is fixedly provided with an oil tank, an oil outlet pipe of the first oil pump is welded with a stirring mechanism, the stirring mechanism comprises a stirring box, the top of the stirring box is welded with a motor, an output shaft of the motor is welded with a stirring blade, the inner walls of two sides of the stirring box are both welded with magnets, the inner walls of two sides of the stirring box are both provided with filter screens through bolts, two ends of two pressing plates are both in sliding connection with the inner walls of two sides of an energy storage tank, and the inner walls of the top and the bottom of the energy storage tank are both welded with a plurality of springs, the hydraulic energy storage device has simple structure and convenient use, and can stir and filter hydraulic oil through the stirring mechanism, the problem of pipeline blockage is avoided, and the use of enterprises is facilitated.
Description
Technical Field
The invention relates to the technical field of hydraulic energy storage equipment, in particular to a hydraulic energy storage device of an oil press.
Background
The hydraulic press is a machine which uses special hydraulic oil as working medium and uses hydraulic pump as power source to complete a certain mechanical action as productivity, the existing power mechanism is composed of oil tank, high-pressure pump, low-pressure control system, motor and various pressure valves and direction valves, but the oil pressure required by the hydraulic press is larger, so that it is necessary to connect energy storage device to increase the output intensity of the hydraulic press, the hydraulic oil circularly flows among the oil tank, pump and hydraulic press, the impurities in the oil tank, pump and hydraulic press are mixed in the hydraulic oil.
However, in the prior art, the filter is too single, the used hydraulic oil is not filtered cleanly, the hydraulic oil is easy to block, and impurities in the hydraulic oil damage pipelines of the hydraulic oil, so that the hydraulic energy storage device of the hydraulic oil press is provided.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a hydraulic energy storage device of an oil press.
In order to achieve the purpose, the invention adopts the following technical scheme: a hydraulic energy storage device of an oil press comprises a box body, wherein a first oil pump is welded on the inner wall of the bottom of the box body, an oil pumping pipe of the first oil pump extends out of the box body and is fixedly provided with an oil tank, an oil outlet pipe of the first oil pump is welded with an agitating mechanism, the agitating mechanism comprises an agitating tank, a motor is welded at the top of the agitating tank, an agitating blade is welded on an output shaft of the motor, magnets are welded on the inner walls of two sides of the agitating tank, filter screens are installed on the inner walls of two sides of the agitating tank through bolts, a feed inlet and a discharge outlet are respectively formed in the inner walls of two sides of the agitating tank, a second oil pump is welded at the discharge outlet through a pipeline, an energy storage tank is welded at the oil outlet pipe of the second oil pump, two pressing plates are arranged in the energy storage tank, two ends of the two pressing plates are both connected with the inner walls of two sides of the energy storage tank in a sliding manner, and a plurality of springs are welded on the inner wall of the top and the inner wall of the bottom of the energy storage tank, the oil storage tank is characterized in that the springs and the pressing plate are welded together, an oil pipe is welded on one side of the energy storage tank, a hydraulic machine is welded on the other end of the oil pipe, a guide pipe is welded on the top of the hydraulic machine, and the other end of the guide pipe is welded together with the top of the oil tank.
Preferably, the inner wall of the top of the box body and the inner wall of one side of the box body are welded with fixing blocks, through holes are formed in the fixing blocks, sealing rings are arranged in the through holes, and the sealing rings are bonded with the guide pipes.
Preferably, branch is all welded to the both sides of motor, and the bottom of two branch is in the same place with the top welding of agitator tank.
Preferably, the inner walls of the two sides of the energy storage tank are provided with sliding grooves, the sliding grooves are internally and fixedly provided with wire drawing wires, and the other ends of the wire drawing wires are welded with one end of the pressing plate.
Preferably, four support legs which are arranged in a rectangular shape are welded at the bottom of the stirring box.
Preferably, a support plate is welded at the bottom of the first oil pump, and the bottom of the support plate and the inner wall of the bottom of the box body are welded together.
Compared with the prior art, the invention has the beneficial effects that: start first oil pump during the use, second oil pump and motor, first oil pump inhales the agitator tank with the oil in the oil tank in, the motor output rotates and drives the stirring leaf, the stirring leaf can stir hydraulic oil, hydraulic oil receives the stirring back, iron fillings in the fluid can be by the magnet suction, hydraulic oil can be through in filter screen filters back through the discharge gate is inhaled the energy storage jar by the second oil pump, can produce pressure to two pressing plates in the entering energy storage jar of hydraulic oil, when two pressing plates are extruded by pressure, a plurality of springs can reverse push down the pressing plate and produce power, hydraulic oil can flow the hydraulic press in through the pipeline after that and do work the part production pressure to the hydraulic press, last hydraulic oil can flow in the oil tank along the pipe, carry out the recirculation. The hydraulic oil stirring and filtering device is simple in structure and convenient to use, hydraulic oil is stirred and filtered through the stirring mechanism, the problem of pipeline blockage is solved, and the hydraulic oil stirring and filtering device is convenient for enterprises to use.
The hydraulic oil stirring and filtering device is simple in structure and convenient to use, hydraulic oil is stirred and filtered through the stirring mechanism, the problem of pipeline blockage is solved, and the hydraulic oil stirring and filtering device is convenient for enterprises to use.
Drawings
FIG. 1 is a front cross-sectional structural schematic view of the present invention;
FIG. 2 is a front cross-sectional structural schematic view of the stirring mechanism of FIG. 1;
FIG. 3 is an enlarged schematic view of portion A of FIG. 1;
in the figure: 1. a box body; 2. a first oil pump; 3. an oil tank; 4. a stirring mechanism; 5. a motor; 6. stirring blades; 7. a magnet; 8. a filter screen; 9. a discharge port; 10. a feed inlet; 11. a second oil pump; 12. an energy storage tank; 13. a spring; 14. a pressing plate; 15. drawing wires; 16. a hydraulic press; 17. a stirring box; 18. and (5) fixing blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a hydraulic energy storage device of an oil press comprises a box body 1, wherein a first oil pump 2 is welded on the inner wall of the bottom of the box body 1, an oil pumping pipe of the first oil pump 2 extends out of the box body 1 and is fixedly provided with an oil tank 3, an oil outlet pipe of the first oil pump 2 is welded with a stirring mechanism 4, the stirring mechanism 4 comprises a stirring box 17, a motor 5 is welded on the top of the stirring box 17, a stirring blade 6 is welded on an output shaft of the motor 5, magnets 7 are welded on the inner walls of two sides of the stirring box 17, filter screens 8 are installed on the inner walls of two sides of the stirring box 17 through bolts, a feed inlet 10 and a discharge outlet 9 are respectively arranged on the inner walls of two sides of the stirring box 17, a second oil pump 11 is welded through a pipeline at the discharge outlet pipe of the second oil pump 11, an energy storage tank 12 is welded with two pressing plates 14, two ends of the two pressing plates 14 are slidably connected with the inner walls of two sides of the energy storage tank 12, a plurality of springs 13 are welded on the inner wall of the top and the inner wall of the bottom of the energy storage tank 12, the springs 13 are welded with a pressing plate 14, an oil pipe is welded on one side of the energy storage tank 12, a hydraulic machine 16 is welded on the other end of the oil pipe, a guide pipe is welded on the top of the hydraulic machine 16, and the other end of the guide pipe is welded with the top of the oil tank 3;
fixed blocks 18 are welded on the inner wall of the top part and the inner wall of one side of the box body 1, through holes are formed in the fixed blocks 18, sealing rings are arranged in the through holes and bonded with guide pipes, supporting rods are welded on two sides of the motor 5, the bottoms of the two supporting rods are welded with the top part of the stirring box 17, sliding grooves are formed in the inner walls of two sides of the energy storage tank 12, drawing wires 15 are fixedly arranged in the sliding grooves, the other end of each drawing wire 15 is welded with one end of a pressing plate 14, four support legs which are arranged in a rectangular shape are welded at the bottom of the stirring box 17, a supporting plate is welded at the bottom of the first oil pump 2, the bottom of the supporting plate is welded with the inner wall of the bottom part of the box body 1, the first oil pump 2, the second oil pump 11 and the motor 5 are started when the hydraulic oil pump is used, the first oil pump 2 sucks oil in the oil tank 3 into the stirring box 17, the output end of the motor 5 rotates to drive the stirring blades 6, and the stirring blades can stir the hydraulic oil, after hydraulic oil receives the stirring, iron fillings in the fluid can be by magnet 7 suction, hydraulic oil can be through in the discharge gate 9 is inhaled energy storage tank 12 by second oil pump 11 after filter screen 8 filters again, can produce pressure to two pressure strips 14 in the entering energy storage tank 12 of hydraulic oil, when two pressure strips 14 were extrudeed by pressure, a plurality of springs 13 can reverse the pressure strip 14 and produce power, hydraulic oil can flow to hydraulic press 16 in through the pipeline and produce pressure to the part of doing work of hydraulic press 16, hydraulic oil can flow into in the oil tank 3 along the pipe at last, recirculate. The hydraulic oil stirring and filtering device is simple in structure and convenient to use, hydraulic oil is stirred and filtered through the stirring mechanism, the problem of pipeline blockage is solved, and the hydraulic oil stirring and filtering device is convenient for enterprises to use.
The working principle is as follows: when the hydraulic oil pump is used, the first oil pump 2, the second oil pump 11 and the motor 5 are started, oil in the oil tank 3 is sucked into the stirring box 17 by the first oil pump 2, the output end of the motor 5 rotates to drive the stirring blade 6, the stirring blade can stir hydraulic oil, after the hydraulic oil is stirred, scrap iron in the oil can be sucked out by the magnet 7, the hydraulic oil is sucked into the energy storage tank 12 through the discharge port 9 after being filtered by the filter screen 8 and then is sucked into the energy storage tank 12 through the second oil pump 11, the hydraulic oil can generate pressure for the two pressing plates 14 when entering the energy storage tank 12, when the two pressing plates 14 are pressed by the pressure, the pressing plates 14 can be pushed back by the springs 13 to generate force, then the hydraulic oil can flow into the hydraulic machine 16 through a pipeline to generate pressure for working parts of the hydraulic machine 16, and finally the hydraulic oil can flow into the oil tank 3 along the guide pipe to be recycled. The hydraulic oil stirring and filtering device is simple in structure and convenient to use, hydraulic oil is stirred and filtered through the stirring mechanism, the problem of pipeline blockage is solved, and the hydraulic oil stirring and filtering device is convenient for enterprises to use.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an oil press hydraulic pressure energy storage equipment, includes box (1), its characterized in that: the oil pump structure is characterized in that a first oil pump (2) is fixedly mounted on the inner wall of the bottom of the box body (1), an oil pumping pipe of the first oil pump (2) extends out of the box body (1) and is fixedly mounted with an oil tank (3), an oil outlet pipe of the first oil pump (2) is fixedly connected with a stirring mechanism (4), the stirring mechanism (4) comprises a stirring box (17), a motor (5) is fixedly mounted at the top of the stirring box (17), stirring blades (6) are fixedly mounted on an output shaft of the motor (5), magnets (7) are fixedly mounted on inner walls of two sides of the stirring box (17), filter screens (8) are fixedly mounted on inner walls of two sides of the stirring box (17), a feed inlet (10) and a discharge outlet (9) are respectively formed on inner walls of two sides of the stirring box (17), and a second oil pump (11) is fixedly mounted on the discharge outlet (9) through a pipeline, the oil pipe fixed mounting of second oil pump (11) has energy storage tank (12), be equipped with two in energy storage tank (12) and press clamp plate (14), two both ends of pressing clamp plate (14) all with the both sides inner wall sliding connection of energy storage tank (12), equal fixed mounting has a plurality of springs (13) on the top inner wall of energy storage tank (12) and the bottom inner wall, a plurality of springs (13) and press clamp plate (14) fixed connection, one side fixed mounting of energy storage tank (12) has oil pipe, and the other end fixed mounting of oil pipe has hydraulic press (16), the top fixed mounting of hydraulic press (16) has the pipe, the other end of pipe and the top fixed connection of oil tank (3).
2. The hydraulic energy storage device of an oil press as claimed in claim 1, wherein: fixed block (18) are fixedly mounted on the inner wall of the top of box body (1) and the inner wall of one side of the box body, a through hole is formed in the fixed block (18), a sealing ring is arranged in the through hole, and the sealing ring is bonded with the guide pipe.
3. The hydraulic energy storage device of an oil press as claimed in claim 1, wherein: the equal fixed mounting in both sides of motor (5) has branch, the bottom of two branches and the top fixed connection of agitator tank (17).
4. The hydraulic energy storage device of an oil press as claimed in claim 1, wherein: the energy storage tank is characterized in that sliding grooves are formed in the inner walls of the two sides of the energy storage tank (12), a drawing wire (15) is fixedly mounted in each sliding groove, and the other end of each drawing wire (15) is fixedly connected with one end of the corresponding pressing plate (14).
5. The hydraulic energy storage device of an oil press as claimed in claim 1, wherein: four support legs which are arranged in a rectangular shape are fixedly arranged at the bottom of the stirring box (17).
6. The hydraulic energy storage device of an oil press as claimed in claim 1, wherein: the bottom of first oil pump (2) is fixed with the backup pad, the bottom of backup pad and the bottom inner wall fixed connection of box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010359840.2A CN113586533A (en) | 2020-04-30 | 2020-04-30 | Hydraulic energy storage device of oil press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010359840.2A CN113586533A (en) | 2020-04-30 | 2020-04-30 | Hydraulic energy storage device of oil press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113586533A true CN113586533A (en) | 2021-11-02 |
Family
ID=78236853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010359840.2A Pending CN113586533A (en) | 2020-04-30 | 2020-04-30 | Hydraulic energy storage device of oil press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113586533A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114053784A (en) * | 2021-12-03 | 2022-02-18 | 重庆安全技术职业学院 | Quick collection device for petroleum pipeline leakage |
| CN114109932A (en) * | 2021-11-18 | 2022-03-01 | 京杭运河江苏省交通运输厅苏北航务管理处 | Special oil tank for hydraulic device and use method |
| CN115289106A (en) * | 2022-10-10 | 2022-11-04 | 烟台中宇航空液压有限公司 | Oil filter of electrohydraulic servo valve |
-
2020
- 2020-04-30 CN CN202010359840.2A patent/CN113586533A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109932A (en) * | 2021-11-18 | 2022-03-01 | 京杭运河江苏省交通运输厅苏北航务管理处 | Special oil tank for hydraulic device and use method |
| CN114053784A (en) * | 2021-12-03 | 2022-02-18 | 重庆安全技术职业学院 | Quick collection device for petroleum pipeline leakage |
| CN115289106A (en) * | 2022-10-10 | 2022-11-04 | 烟台中宇航空液压有限公司 | Oil filter of electrohydraulic servo valve |
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Application publication date: 20211102 |
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| WD01 | Invention patent application deemed withdrawn after publication |