CN202545114U - Rotary radius adjusting mechanism for paddles of vertical shaft wind-driven generator - Google Patents
Rotary radius adjusting mechanism for paddles of vertical shaft wind-driven generator Download PDFInfo
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- CN202545114U CN202545114U CN2012201092666U CN201220109266U CN202545114U CN 202545114 U CN202545114 U CN 202545114U CN 2012201092666 U CN2012201092666 U CN 2012201092666U CN 201220109266 U CN201220109266 U CN 201220109266U CN 202545114 U CN202545114 U CN 202545114U
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a rotary radius adjusting mechanism for paddles of a vertical shaft wind-driven generator. The paddles are distributed on the same circumference; and the rotary radius adjusting mechanism comprises a power assembly and execution assemblies, wherein the power assembly consists of a power assembly and a vertical pipe assembly; draught fan hub shells are symmetrically arranged at the upper end and the lower end of the vertical pipe assembly; the power assembly is arranged in the vertical pipe assembly; the power device in the power assembly can drive two vertical output shafts to rotate; the vertical output shafts are distributed above and below the power device; one ends of the two vertical output shafts, far away from the power device, extend to the corresponding draught fan hub shells; drive bevel pinions are sleeved at two extending ends of the vertical output shafts; and the execution assemblies are symmetrically arranged on the two draught fan hub shells and are horizontally arranged. With the adoption of the rotary radius adjusting mechanism, the defect that the rotary radiuses of the paddles cannot be adjusted in the traditional structure is overcome; and the rotary radius adjusting mechanism has a simple structure, is convenient to manufacture, has good technical and economical values, and is particularly suitable for large-scale popularization and application in the field of vertical shaft wind-driven generators.
Description
Technical field
The utility model belongs to the vertical axis aerogenerator field, specifically, relates in particular to the controlling mechanism of the vertical axis aerogenerator blade turning radius.
Background technique
The turning radius of vertical axis aerogenerator blade is the radius value that blade arrives its gyration center; The turning radius of vertical axis aerogenerator blade is just confirmed when design at present; Unadjustable, and the rated power of the turning radius value that should set and rated wind speed, cut-out wind speed and wind-driven generator is closely related.In addition, the actual turning radius and the actual wind speed of the output power of wind motor and blade are proportionate.In the day-to-day operation process, we find that actual wind speed usually has very big-difference with rated wind speed, cut-out wind speed.
When actual wind speed is low; High vertical axis aerogenerator starts relatively difficulty; If can suitably increase the starting torque that the turning radius of blade improves vertical axis aerogenerator this moment; Just can effectively solve the problem that starts difficulty, can also this low wind speed be used simultaneously, enlarge wind speed and utilized scope.
When actual wind speed is between rated wind speed and cut-out wind speed; Receive the restriction of capacity motor or the like factor need the output power of wind-driven generator be stabilized near its rated power; And existing structure can't regulate adaptively the turning radius of blade according to actual wind speed; And then cause the output power of wind-driven generator and its rated power deviation bigger, will produce bigger impact to electrical network like this.This moment common nothing become the vertical axis aerogenerator of radius can only forced stoppage, generation outage, but can waste wind energy resources in a large number so again; And the present invention helps improving stability, the Security under the high capacity of vertical axis aerogenerator generated output, the adaptability of different wind conditions, and enlarges the scope of utilizing to wind speed.
The model utility content
The utility model technical problem to be solved is to provide a kind of turning radius controlling mechanism of vertical axis aerogenerator blade, and it can regulate the turning radius of wind power generator oar blade.
The technological scheme of the utility model is following: a kind of turning radius controlling mechanism of vertical axis aerogenerator blade; The blade (1) that comprises vertical setting; This blade of multi-disc is distributed on the same circumference; And the upper and lower part of each blade (1) is set with a fan-catcher (2) respectively, it is characterized in that: the inboard of circle is provided with Power Component, vertical tube assembly, executive module, axial fan hub shell (3) and drive bevel gear (4) at said blade (1) place, and wherein axial fan hub shell (3) symmetry is located at the upper and lower end of said vertical tube assembly; Said Power Component is set in the vertical tube assembly; This Power Component comprises power plant (5) and vertical output shaft (6), and wherein vertically output shaft (6) symmetry is located at the upper and lower of power plant (5), and under the drive of power plant (5), rotates around separately shaft axis; And two vertical output shafts (6) reach in the corresponding axial fan hub shell (3) away from an end of power plant, and all are set with said drive bevel gear (4) at two inserting ends;
Go up average level at two axial fan hub shells (3) and be provided with said executive module, the position of this executive module is corresponding one by one with said fan-catcher (2); Said executive module comprises screw mandrel (7), driven wheel of differential (8) and conduit (9); Wherein screw mandrel (7) passes through bearings on the said axial fan hub shell (3) of correspondence; And the inner of screw mandrel (7) reaches in the axial fan hub shell; And at the said driven wheel of differential of this inserting end suit (8), this driven wheel of differential is meshed with said drive bevel gear (4);
Said conduit (9) is set in the outside of screw mandrel (7) through screw pair; This outer end of conduit is fixedly connected with corresponding said fan-catcher (2); Under the drive of said power plant (5); Each blade (1) can expand outwardly synchronously or draw in inwardly, thus the turning radius of each blade of synchronization regulation (1).
When this controlling mechanism is installed; The lower end of a following axial fan hub shell is connected with the wheelboss flange dish; This wheelboss flange dish is located at the upper end of wheel hub main shaft, and this wheel hub main shaft is positioned at the top of wind-driven generator, and links to each other with the main shaft of wind-driven generator through coupling.During operation, rotate at said blade (1) wraparound commentaries on classics center under the effect of wind energy, thereby drive the generating of wind turbine power generation machine.
Shown in accompanying drawing 1 to 5; When need regulating the turning radius of blades (1), start power plant (5), these power plant drive two vertical output shafts (6) around separately shaft axis rotation; And then drive two said drive bevel gear (4) and rotate; Two drive bevel gear (4) of rotating drive each driven wheel of differential (8) that is engaged with simultaneously and rotate synchronously, and then drive said screw mandrel (7) rotation, and the screw mandrel of rotation (7) drives conduit (this conduit is equivalent to nut) above it synchronously along this screw mandrel (7) axial slip; The final blade (1) that drives moves in horizontal plane; And each blade (1) is realized interlock, and expands outwardly synchronously or draw in inwardly, thus the turning radius of each blade of synchronization regulation (1).
When actual wind speed is low; High vertical axis aerogenerator starts relatively difficulty; If can suitably increase the starting torque that the turning radius of blade improves vertical axis aerogenerator this moment; Just can effectively solve the problem that starts difficulty, can also this low wind speed be used simultaneously, enlarge wind speed and utilized scope;
When actual wind speed >=rated wind speed, the control power plant reduce the turning radius of blade, can also guarantee the wind-driven generator proper functioning like this, and utilize the wind energy resources that need not effectively utilize originally well, significantly increase economic efficiency;
When actual wind speed is between rated wind speed and cut-out wind speed; Can specifically regulate the turning radius of said blade (1) according to the size of actual wind speed; Can not only guarantee the wind-driven generator proper functioning like this, avoid wind speed greater than rated wind speed the time, generator produces bigger impact to electrical network; And utilize the wind energy resources that need not effectively utilize originally well, significantly increase economic efficiency.
The utility model can be regulated the turning radius of blade as required; Overcome the defective that conventional construction can not be regulated the blade turning radius well; Simple in structure, easy to make, have good technical and economic value, be suitable for large-scale promotion utilization in the vertical axis aerogenerator field.
In the present technique scheme; Said Power Component is made up of power plant (5), vertical output shaft (6), retarder (10) and coupling (11); Wherein power plant (5) are dual-axle motor, and two output terminals of this dual-axle motor link to each other with corresponding vertical output shaft (6) with coupling (11) through said retarder (10) respectively.In the present embodiment, the synchronism of two vertical output shafts (6) that dual-axle motor connects is good, can drive each blade (1) reliably and move in the horizontal plane inter-sync, regulates the turning radius of blade (1).Certainly; The utility model not restricted power device (5) is necessary for dual-axle motor; Also can adopt two as required back to the single shaft motor that is provided with, and the logical retarder (10) of all crossing of two single shaft motors output terminal separately links to each other with corresponding vertical output shaft (6) with coupling (11).
Said vertical tube assembly is made up of mounting pipe (12) and vertical tube (13), and wherein mounting pipe (12) is connected between two vertical tube (13), and three's tube core line is on same straight line; Said power plant (5) are installed in the mounting pipe (12), and two said vertical output shafts (6) then pass through bearings in the vertical tube (13) of correspondence, so just can carry out disassemble or assemble easily, and then be convenient to transportation, have improved the performance of this device effectively.
Said executive module also comprises horizontal branch stay tube (14); The inner of this horizontal branch stay tube is fixed on the said axial fan hub shell (3); And horizontal branch stay tube (14) is set in outside the said conduit (9); These two pipes are slidingly matched, so just can not only lead to conduit (9) well, and supporting tube (9) and said screw mandrel (7) better.
The cross section of said conduit (9) and horizontal branch stay tube (14) is ellipse, can not only effectively reduce turbulent flow like this, and can prevent preferably that said blade (1) from twisting in vertical plane.
In the present technique scheme, the number of said blade (1) is generally 4, and each blade (1) is evenly distributed on the same circumference, and the number of blade (1) also can adjust accordingly according to actual needs certainly.
Beneficial effect: the utility model can be regulated the turning radius of blade as required; Overcome the defective that conventional construction can not be regulated the blade turning radius well; Simple in structure, easy to make; Have good technical and economic value, be suitable for large-scale promotion utilization in the vertical axis aerogenerator field.
Description of drawings
Fig. 1 is the axonometric drawing of the utility model;
Fig. 2 is the sectional view of Fig. 1;
Fig. 3 is the partial enlarged drawing of A part among Fig. 2;
Fig. 4 is the partial enlarged drawing of B part among Fig. 2;
Fig. 5 is the partial enlarged drawing of C part among Fig. 2;
Fig. 6 be among Fig. 2 D-D to cutaway view Amplified image.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
Shown in Fig. 1～6, this controlling mechanism is by blade 1, fan-catcher 2, axial fan hub shell 3, drive bevel gear 4, Power Component, vertical tube assembly and executive module, and wherein blade 1 is vertical setting; This blade 1 is distributed on the same circumference; In the present embodiment, the number of said blade 1 is 4, and is evenly distributed on the same circumference; Certainly also can adopt the blade of other number, as 3,5,6
For the ease of fixed blades 1, the spy is set with a fan-catcher 2 respectively in the upper and lower of each blade 1, and the structure and the set-up mode of this fan-catcher 2 belong to existing technology, do not do at this and give unnecessary details.
As the model utility point of the utility model, said Power Component, vertical tube assembly, executive module, axial fan hub shell 3 and drive bevel gear 4 are set in the inboard of above-mentioned blade 1 place circle.Said vertical tube assembly is made up of mounting pipe 12 and vertical tube 13, and wherein mounting pipe 12 is connected between two vertical tube 13, and three's tube core line is on same straight line.Upper and lower end at above-mentioned vertical tube assembly is arranged with said axial fan hub shell 3, is specially two axial fan hub shells 3 respectively through vertical tube corresponding in screw and the vertical tube assembly 13 fixed connections.Said axial fan hub shell 3 is a rotary structure; The tube core line of its center line and said vertical tube 13 is on same straight line; And the outer wall upper edge circumference of axial fan hub shell 3 evenly is provided with 4 horizontal support arm 3a; This horizontal support arm 3a is used to support said executive module, and horizontal support arm 3a communicates with the inner chamber of axial fan hub shell 3.In addition; Above the top of an axial fan hub shell 3 be connected with top cover 15 through screw; The lower end of an axial fan hub shell 3 is connected with wheelboss flange dish 16 below when this controlling mechanism is installed; This wheelboss flange dish 16 is located at the upper end of wheel hub main shaft 17, and this wheel hub main shaft 17 is positioned at the top of wind-driven generator 18, and links to each other with the main shaft of wind-driven generator 18 through coupling.
Can find out like Fig. 1～6; Said Power Component is installed in the vertical tube assembly; This Power Component comprises power plant 5 and vertical output shaft 6, and wherein vertically output shaft 6 symmetries are located at the above and below of power plant 5, and under the drive of power plant 5, rotates around separately shaft axis; And two vertical output shafts 6 reach in the corresponding axial fan hub shell 3 away from an end of power plant, and all are set with said drive bevel gear 4 at two inserting ends.
In the present embodiment; Said Power Component is made up of power plant 5, vertical output shaft 6, retarder 10 and coupling 11; Wherein power plant 5 are the dual-axle motor of outsourcing; This dual-axle motor has two output terminals, and a wherein top output terminal links to each other with a said vertical output shaft 6 of power plant 5 tops with coupling 11 through said retarder 10.Below output terminal link to each other with a said vertical output shaft 6 of power plant 5 belows with coupling 11 through said retarder 10.And two 6 of vertical output shafts pass through bearings in the said vertical tube 13 of correspondence, and the tube core line of the shaft axis of vertical output shaft 6 and this vertical tube 13 is on same straight line.In addition, said power plant 5 in mounting pipe 12, when these power plant 5 start, can drive two said vertical output shafts 6 around separately shaft axis rotation, and the rotational velocity of two vertical output shafts 6 are all identical with direction through screw.
Certainly, the utility model not restricted power device 5 is necessary for dual-axle motor, and these power plant 5 also can adopt two back to the single shaft motor that is provided with.
Can draw like Fig. 1～6, average level is provided with said executive module on two axial fan hub shells 3, and the position of this executive module is corresponding one by one with said fan-catcher 2.In the present embodiment, above an axial fan hub shell 3 be provided with 4 executive modules, these 4 executive modules that the position is set is corresponding one by one with the fan-catcher 2 on 4 blade 1 tops; And also be provided with 4 executive modules on the following axial fan hub shell 3, these 4 executive modules that the position is set is corresponding one by one with the fan-catcher 2 of 4 blade 1 bottoms.
Said executive module is made up of screw mandrel 7, driven wheel of differential 8, conduit 9 and horizontal branch stay tube 14; Wherein screw mandrel 7 is through in the horizontal support arm 3a of bearings on corresponding axial fan hub shell 3; And the inner of screw mandrel 7 reaches in the axial fan hub shell 3; And at the said driven wheel of differential 8 of this inserting end suit, this driven wheel of differential 8 is meshed with said drive bevel gear 4.Said conduit 9 is equivalent to nut, and this conduit 9 is set in the outside of screw mandrel 7 through screw pair, and the outer end of this conduit 9 and corresponding said fan-catcher 2 are fixedly connected.
Also can find out like Fig. 1～6; The inner of said horizontal branch stay tube 14 is fixed in the horizontal support arm 3a on the said axial fan hub shell 3; This horizontal branch stay tube 14 is set in outside the said conduit 9, and these two pipes are slidingly matched, and the cross section of conduit 9 and horizontal branch stay tube 14 is ellipse.
In addition; Because present embodiment medium power device 5 is a dual-axle motor; Two vertical output shaft 6 rotational velocity that this power plant 5 drive are all identical with direction, thus in top 4 executive modules in the rotation direction of screw mandrel 7 and following 4 executive modules rotation direction of screw mandrel 7 on the contrary necessary because only in this way could guarantee under the drive of said power plant 5; The conduit that is connected with each fan-catcher 29 synchronously towards or move away from the center of vertical tube assembly; And then it is mobile in horizontal plane synchronously to drive each blade 1, and expands outwardly synchronously or draw in inwardly, regulates the turning radius of blade 1.Certainly; If adopt two single shaft motors to serve as power plant 5, in order to guarantee that each blade 1 can expand outwardly synchronously or draw in that two single shaft rotating speed of motor must be identical inwardly back to setting; And two single shaft motors both turn to can be identical also can be opposite; When turning to of two single shaft motors was identical, these two single shaft motors just were equivalent to a dual-axle motor, and the rotation direction of screw mandrel 7 must be opposite in the rotation direction of screw mandrel 7 and following 4 executive modules in top 4 executive modules at this moment; When the switched in opposite of two single shaft motors, in this moment top 4 executive modules in the rotation direction of screw mandrel 7 and following 4 executive modules rotation direction of screw mandrel 7 necessary identical.
The above is merely the preferred embodiment of the utility model; It is not restriction with the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (6)
1. the turning radius controlling mechanism of a vertical axis aerogenerator blade; The blade (1) that comprises vertical setting; This blade of multi-disc is distributed on the same circumference; And the upper and lower part of each blade (1) is set with a fan-catcher (2) respectively, it is characterized in that: the inboard of circle is provided with Power Component, vertical tube assembly, executive module, axial fan hub shell (3) and drive bevel gear (4) at said blade (1) place, and wherein axial fan hub shell (3) symmetry is located at the upper and lower end of said vertical tube assembly; Said Power Component is set in the vertical tube assembly; This Power Component comprises power plant (5) and vertical output shaft (6), and wherein vertically output shaft (6) symmetry is located at the upper and lower of power plant (5), and under the drive of power plant (5), rotates around separately shaft axis; And two vertical output shafts (6) reach in the corresponding axial fan hub shell (3) away from an end of power plant, and all are set with said drive bevel gear (4) at two inserting ends;
Go up average level at two axial fan hub shells (3) and be provided with said executive module, the position of this executive module is corresponding one by one with said fan-catcher (2); Said executive module comprises screw mandrel (7), driven wheel of differential (8) and conduit (9); Wherein screw mandrel (7) passes through bearings on the said axial fan hub shell (3) of correspondence; And the inner of screw mandrel (7) reaches in the axial fan hub shell; And at the said driven wheel of differential of this inserting end suit (8), this driven wheel of differential is meshed with said drive bevel gear (4);
Said conduit (9) is set in the outside of screw mandrel (7) through screw pair; This outer end of conduit is fixedly connected with corresponding said fan-catcher (2); Under the drive of said power plant (5); Each blade (1) can expand outwardly synchronously or draw in inwardly, thus the turning radius of each blade of synchronization regulation (1).
2. the turning radius controlling mechanism of vertical axis aerogenerator blade according to claim 1; It is characterized in that: said Power Component is made up of power plant (5), vertical output shaft (6), retarder (10) and coupling (11); Wherein power plant (5) are dual-axle motor, and two output terminals of this dual-axle motor link to each other with corresponding vertical output shaft (6) with coupling (11) through said retarder (10) respectively.
3. the turning radius controlling mechanism of vertical axis aerogenerator blade according to claim 1 and 2; It is characterized in that: said vertical tube assembly is made up of mounting pipe (12) and vertical tube (13); Wherein mounting pipe (12) is connected between two vertical tube (13), and three's tube core line is on same straight line; Said power plant (5) are installed in the mounting pipe (12), and two said vertical output shafts (6) then pass through bearings in the vertical tube (13) of correspondence.
4. the turning radius controlling mechanism of vertical axis aerogenerator blade according to claim 3; It is characterized in that: said executive module also comprises horizontal branch stay tube (14); The inner of this horizontal branch stay tube is fixed on the said axial fan hub shell (3); And horizontal branch stay tube (14) is set in outside the said conduit (9), and these two pipes are slidingly matched.
5. the turning radius controlling mechanism of vertical axis aerogenerator blade according to claim 4 is characterized in that: the cross section of said conduit (9) and horizontal branch stay tube (14) is ellipse.
6. the turning radius controlling mechanism of vertical axis aerogenerator blade according to claim 5 is characterized in that: the number of said blade (1) is 4, and each blade (1) is evenly distributed on the same circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201092666U CN202545114U (en) | 2012-03-21 | 2012-03-21 | Rotary radius adjusting mechanism for paddles of vertical shaft wind-driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201092666U CN202545114U (en) | 2012-03-21 | 2012-03-21 | Rotary radius adjusting mechanism for paddles of vertical shaft wind-driven generator |
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| Publication Number | Publication Date |
|---|---|
| CN202545114U true CN202545114U (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201092666U Expired - Lifetime CN202545114U (en) | 2012-03-21 | 2012-03-21 | Rotary radius adjusting mechanism for paddles of vertical shaft wind-driven generator |
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| CN (1) | CN202545114U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606401A (en) * | 2012-03-21 | 2012-07-25 | 重庆大学 | Vertical axis wind turbine and turning radius adjusting mechanism of paddles of vertical axis wind turbine |
| CN107469749A (en) * | 2017-09-05 | 2017-12-15 | 蔡素真 | A kind of environment-friendly liquid hybrid reaction high efficiency smart reactor |
| CN107469750A (en) * | 2017-09-05 | 2017-12-15 | 蔡素真 | Chemical reaction kettle is used in a kind of environment-friendly type solid-liquid mixing |
| CN110719997A (en) * | 2017-03-27 | 2020-01-21 | 元素工程公司 | Vertical axis wind turbine generator |
-
2012
- 2012-03-21 CN CN2012201092666U patent/CN202545114U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606401A (en) * | 2012-03-21 | 2012-07-25 | 重庆大学 | Vertical axis wind turbine and turning radius adjusting mechanism of paddles of vertical axis wind turbine |
| CN102606401B (en) * | 2012-03-21 | 2013-08-21 | 重庆大学 | Vertical axis wind turbine and turning radius adjusting mechanism of paddles of vertical axis wind turbine |
| CN110719997A (en) * | 2017-03-27 | 2020-01-21 | 元素工程公司 | Vertical axis wind turbine generator |
| CN110719997B (en) * | 2017-03-27 | 2021-06-29 | 元素工程公司 | Vertical axis wind turbine generator |
| CN107469749A (en) * | 2017-09-05 | 2017-12-15 | 蔡素真 | A kind of environment-friendly liquid hybrid reaction high efficiency smart reactor |
| CN107469750A (en) * | 2017-09-05 | 2017-12-15 | 蔡素真 | Chemical reaction kettle is used in a kind of environment-friendly type solid-liquid mixing |
| CN107469749B (en) * | 2017-09-05 | 2019-02-12 | 中盐淮安鸿运盐化有限公司 | A kind of environment-friendly liquid hybrid reaction high efficiency smart reaction kettle |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121121 Effective date of abandoning: 20130821 |
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| RGAV | Abandon patent right to avoid regrant |