CN201680136U - Oil pump with variable oil discharge quantity - Google Patents
Oil pump with variable oil discharge quantity Download PDFInfo
- Publication number
- CN201680136U CN201680136U CN2010201409408U CN201020140940U CN201680136U CN 201680136 U CN201680136 U CN 201680136U CN 2010201409408 U CN2010201409408 U CN 2010201409408U CN 201020140940 U CN201020140940 U CN 201020140940U CN 201680136 U CN201680136 U CN 201680136U
- Authority
- CN
- China
- Prior art keywords
- oil
- oil pump
- external rotor
- reaction spring
- rotor
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
An oil pump with variable oil discharge quantity comprises parts including an inner rotor, an intermediate rotor, an outer rotor, a reaction spring and the like. The outer rotor is an eccentric circular ring structure, and outer rotor blades are arranged in a radial direction of the oil pump. Pressure of an oil discharge cavity and reaction spring force are acted on two sides of each of the outer rotor blades, rotation speed of an engine is increased frequently, after the pressure of the oil discharge cavity is increased to a certain degree, oil pressure counteracts the reaction spring force, the outer rotor blades are pushed to drive the outer rotor to rotate, and the relative mesh position of the intermediate rotor and the inner rotor is changed, thereby changing oil absorbing quantity and oil discharge quantity of the oil pump and realizing the purpose that the oil discharge quantity of the oil pump is variable. The oil pump with variable oil discharge quantity can change the quantity of oil inputted in an oil passage of the engine and increase the property of the engine. The inner rotor and the intermediate rotor both adopt present general rotors, are easy to be processed and manufactured and reduce cost. In addition, the oil pump is compact in structure, small in overall dimension, light in weight and low in oil supply pressure pulsation, and can be widely used for engine lubricating systems.
Description
Technical field
The utility model relates to automobile engine system, and more particularly, the utility model relates to the oil pump that is used for engine lubrication system.
Background technique
Oil pump in the engine lubrication system is commonly the immutable quantitative oil pump of revolution discharge capacity at present, and its oil flow rate is directly proportional with engine speed.The immutable oil pump of this kind discharge capacity is when high engine speeds turns round, and along with the raising of the rotating speed of motor, the oil pump fuel delivery constantly increases, and makes that the oil pressure in each oil duct constantly increases, and oily temperature rise influences the running of lubrication effect and motor.In order to address this problem, normally the unnecessary machine oil in the motor main oil gallery is released, wasted a lot of energy of motor in the whole process, therefore can reduce the Economy of motor; In addition, the variable displacement oil pump of minority generally is baroque blade type oil pump at present, complex structure, and component preparation process and product assembling are complicated, cost an arm and a leg, and reliability is relatively poor relatively, is unfavorable for applying on a large scale.
The model utility content
The technical problem that the utility model solved is to provide a kind of variable displacement oil pump, and this oil pump can change the oil mass that pumps into the motor oil duct automatically according to the oil pressure in the motor oil duct, to solve the shortcoming in the above-mentioned background technology.
The technical problem that the utility model solved realizes by the following technical solutions:
According to embodiment of the present utility model, described variable displacement oil pump is made up of parts such as front end shell, internal rotor, center roller, external rotor, rear end housing, live axle and reaction springs.The oil drain out that described rear end housing is provided with oil sucting cavity and the inlet port that links to each other with motor machine oil trap, oil-discharging cavity and links to each other with the oil duct of motor, described front end shell is provided with oil sucting cavity and oil-discharging cavity, and front end shell is provided with reaction spring mounting hole and positioning boss; Described external rotor is inclined to one side toroidal, and the interior circle of external rotor and cylindrical are eccentric relation, and in addition, external rotor radially is provided with the external rotor blade of evagination on circumference, and the external rotor blade side leans against on the positioning boss and positions; Described reaction spring is installed in the reaction spring mounting hole, the end bolt that is fixed, and the other end is supported on the external rotor blade side; The locating face that is provided with on described external rotor blade one side and the front end shell contacts, and communicate with oil-discharging cavity, opposite side contacts with reaction spring, reaction spring applies spring force by adjusting fixing bolt, thereby the offset that external rotor is fixed between the above the inside and outside circle of external rotor of initial position is the same with offset between center roller, the internal rotor, and the running shaft of internal rotor overlaps with the running shaft of external rotor in the process of assembling.
When the rotating speed of live axle within the specific limits, the pressure of oil-discharging cavity is less relatively, the side that this moment, engine oil pressure acted on the external rotor blade forms hydraulic coupling, and hydraulic coupling is less to be not enough to overcome reaction spring power, and oil pump is according to the such proper functioning oil suction of conventional oil pump, oil extraction.
When the rotating speed of live axle continues to increase within the specific limits, the pressure of oil-discharging cavity is simultaneously along with increase at this moment, when pressure increases to a certain degree, the hydraulic coupling that acts on external rotor blade one side enough overcomes reaction spring power, promote the rotation of external rotor blade, the external rotor blade drives the external rotor rotation, thereby drives the change of the engaging position of center roller and internal rotor, cause the oil suction and the oil extraction oil mass of center roller and internal rotor to change, thereby reach the purpose that changes the oil pump discharge capacity.
When drive shaft speed continues to increase, the hydraulic coupling that acts on external rotor blade one side continues to promote the rotation of external rotor blade, during certain position, the external rotor blade will discharge certain flow-passing surface at the oil sucting cavity place, thereby oil-discharging cavity (high-voltage oil cavity) is connected with oil sucting cavity (low pressure oil pocket), thereby reaches the purpose of pressure release, pressure is big more, the flow-passing surface that the external rotor blade discharges is just big more, and it is stable to keep system pressure.
When drive shaft speed descends, oil-discharging cavity pressure is also along with reducing, and reaction spring overcame hydraulic coupling and promoted the rotation of external rotor blade this moment, made center roller and internal rotor reset to initial position.
Beneficial effect:
The oil level that variable displacement oil pump of the present utility model can realize importing the motor oil duct changes according to the needs of motor, when guaranteeing normal working of engine, and has the following advantages:
1, technology is simple, manufacturing easily, and assembly process is few, enhances productivity, and reduces cost;
2, can not cause the machine oil in the motor oil duct too much, improve the performance of motor, increase reliability:
3, compact structure, boundary dimension is little, and is in light weight, and oil suction degree of vacuum is big, and the charge oil pressure pulsation is little.
Description of drawings
Fig. 1 does not comprise the assembling front view of front end shell for the variable displacement oil pump
Fig. 2 is a variable displacement oil pump front end shell plan view
Be labeled as among the figure:
1, internal rotor; 2, center roller; 3, external rotor; 4, external rotor blade; 5, front end shell;
6, rear end housing; 7, reaction spring; 8, live axle; 9, fixing bolt; 10, inlet port;
11, oil drain out; 12, oil sucting cavity; 13, oil-discharging cavity; 14, oil sucting cavity boundary line;
15, positioning boss; 16, reaction spring mounting hole; 17, cooperate the cylndrical surface;
4a, external rotor blade side; 4b, external rotor blade side;
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to the described variable displacement oil pump of Fig. 1, Fig. 2 by internal rotor 1, form with the parts such as center roller 2, external rotor 3, front end shell 5, rear end housing 6, live axle 8, reaction spring 7 and fixing bolt 9 of internal rotor 1 fit engagement.Described external rotor 3 is inclined to one side toroidal, and the interior circle of external rotor 3 and cylindrical are set to eccentric relation, and external rotor 3 radially is provided with the external rotor blade 4 of evagination on circumference; Described front end shell 5 is provided with oil sucting cavity 12 and oil-discharging cavity 13, and is provided with reaction spring mounting hole 16; Be provided with inlet port 10, oil drain out 11, oil sucting cavity 12 and oil-discharging cavity 13 above the described rear end housing 6, wherein inlet port 10 is connected with oil sucting cavity 12 on the one hand, link to each other with engine motor oil trap (not shown) on the other hand, oil drain out 11 is connected with oil-discharging cavity 13 on the one hand, links to each other with motor oil duct (not shown) on the other hand.
The cylindrical of described external rotor 3 and internal rotor 1 are concentric fits, the interior circle of external rotor 3 and the cylindrical of center roller 2 are concentric fits, be eccentric assembling between center roller 2 and the internal rotor 1, and the offset between center roller 2 and the internal rotor 1 equal the offset of external rotor 3 inside and outside circles.Reaction spring 7 is installed in the reaction spring mounting hole 16, and be fixed bolt 9 of an end is fixing, and the other end is supported on the external rotor blade side 4b.External rotor blade side 4a leans against on the positioning boss 15 and positions, external rotor blade side 4b is connected with an end of reaction spring 7, can adjust the spring force of reaction spring 7 by fixing bolt 9, thereby spring force is acted on the external rotor blade side 4b, make external rotor 3, center roller 2 be in initial position.When live axle 8 drive internal rotors 1 rotate according to clockwise direction,, thereby endlessly machine oil is taken to oil-discharging cavity 13 from oil sucting cavity 12 because internal rotor 1 and the engagement of center roller 2 teeth and release form degree of vacuum.
The oil drain out 10 of variable displacement oil pump of the present utility model communicates with the oil duct (not shown) of motor, filler opening 11 communicates with oil trap (not shown) on the motor, and the variable displacement oil pump is as follows according to the different concrete working procedure of rotational speed regulation machine oil pump delivery of motor:
Working state one: when engine speed in small range, oil-discharging cavity 13 internal pressures are relatively low, engine oil pressure acts on external rotor blade side 4a and goes up the generation hydraulic action, less hydraulic action is not enough to overcome reaction spring 7 and acts on spring force on the external rotor blade side 4b, center roller 2, external rotor 3 are keeping initial position constant at this moment, the oil pump normal fuel injection, the same with the common machine oil pump as broad as long;
Working state two: when engine speed continues to increase, when surpassing certain limit, oil-discharging cavity 13 internal pressures increase, thereby the hydraulic action that acts on the external rotor blade side 4a is increased, bigger hydraulic action can overcome reaction spring 7 and act on spring force on the external rotor blade side 4b, promoting external rotor blade 4 clockwise rotates, because external rotor 3 is an eccentric structure, and the external cylindrical surface of external rotor 3 is limited in cooperating in the cylndrical surface 17, external rotor 3 just can change the position of internal rotor 1 and engagement of center roller 2 teeth and release in the process of rotation like this, with respect to working state one, the a pair of tooth that originally is in the oil suction district breaks away from engagement Free up Memory (oil suction), be rotated and move to the oil extraction district this moment, originally be in a pair of tooth engagement compression volume (oil extraction) in oil extraction district, be rotated and move to the oil suction district, cause the number of teeth that works in the oil suction state to reduce relatively, and the number of teeth that works in the oil extraction state is constant, also exist the engaging tooth that works in the oil extraction state directly to enter in the oil sucting cavity in addition pressure oil, thereby reduced the machine oil pump delivery greatly, realized reducing the purpose of oil pump discharge capacity;
Working state three: when engine speed continues to increase, pressure in the oil-discharging cavity 13 also continues to increase, bigger hydraulic action overcomes reaction spring 7 and acts on spring force on the external rotor blade side 4b, continuing to promote external rotor blade 4 clockwise rotates, meanwhile, on the one hand as described in the working state two, internal rotor 1 continues to change with the engaging tooth relative position of center roller 2, thereby continues to reduce the machine oil pump delivery; On the other hand, external rotor blade side 4a crosses the oil sucting cavity boundary line 14 of the oil sucting cavity 12 on the rear end housing 6, thereby discharge the flow-passing surface of certain area, cause the high pressure oil of oil-discharging cavity 13 to let out like this and get back in the oil sucting cavity 12, realize the purpose of oil pump pressure release by the flow-passing surface that discharges;
Variable displacement oil pump reaction spring 7 described in the utility model has certain rigidity, in being assembled to reaction spring mounting hole 16, can regulate the initial spring force of reaction spring 7 by fixing bolt 9, when the engine oil pressure active force promotes 4 rotations of external rotor blade, reaction spring 7 is compressed in the reaction spring mounting hole 16, reaction spring 7 distortion produce bigger spring force, like this when engine speed descends, spring force can promote external rotor blade 4 and be rotated counterclockwise (towards the rotation of initial position direction), close and be released the flow-passing surface that is communicated with oil-discharging cavity 13 and oil sucting cavity 12, make the engine oil pressure of motor oil duct can remain on certain level, guarantee the lubricating requirement of motor.In addition, can or screw out fixing bolt 9 by precession regulates reaction spring and acts on spring force on the external rotor blade 4, thereby can regulate the pressure size of the oil-discharging cavity 13 that promotes 4 rotations of external rotor blade, the interior initial pressure of oil-discharging cavity 13 in the time of simultaneously can also regulating oil-discharging cavity 13 and be communicated with oil sucting cavity 12, so just can do different settings, increase the application area of variable displacement oil pump described in the utility model at the requirement of different engine lubrication systems.
The variable displacement oil pump that adopts technological scheme described in the utility model to make, can realize that the oil level of transporting to motor can change according to the concrete operating mode needs of motor, when guaranteeing normal working of engine in the needed machine oil fuel delivery, can not make the machine oil in the motor oil duct too much, influence the Performance And Reliability of motor, can reduce the power consumption of motor, improve the performance of motor; In addition, variable displacement oil pump described in the utility model is compared with the variable vane machine oil pump of complexity, and internal rotor 1, center roller 2 all adopt the rotor of present traditional common, technology is simple, manufacturing easily, and assembly process is few, enhance productivity, reduce cost; Moreover variable displacement oil pump described in the utility model has compact structure, and boundary dimension is little, and is in light weight, and oil suction degree of vacuum is big, and the advantage that the charge oil pressure pulsation is little can be widely used in the different engine lubrication systems.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. the variable displacement oil pump comprises parts such as front end shell, internal rotor, center roller, external rotor, rear end housing, live axle, reaction spring; It is characterized in that: the oil drain out that described rear end housing is provided with oil sucting cavity and the inlet port that links to each other with the engine motor oil trap, oil-discharging cavity and links to each other with the oil duct of motor, described front end shell is provided with oil sucting cavity and oil-discharging cavity.
2. variable displacement oil pump according to claim 1 is characterized in that: described external rotor is inclined to one side circle structure, and cylindrical and interior circle are set to eccentric relation, and radial direction is provided with the external rotor blade of evagination.
3. variable displacement oil pump according to claim 1 is characterized in that: described front end shell is provided with reaction spring mounting hole and positioning boss.
4. variable displacement oil pump according to claim 1 is characterized in that: the running shaft of described external rotor overlaps with the running shaft of internal rotor.
5. variable displacement oil pump according to claim 1 is characterized in that: described reaction spring is installed in the reaction spring mounting hole, the end bolt that is fixed, and the other end is supported on the external rotor blade side.
6. variable displacement oil pump according to claim 1 is characterized in that: the offset of the inside and outside circle of described external rotor is the same with offset between the center roller internal rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201409408U CN201680136U (en) | 2010-03-25 | 2010-03-25 | Oil pump with variable oil discharge quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201409408U CN201680136U (en) | 2010-03-25 | 2010-03-25 | Oil pump with variable oil discharge quantity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201680136U true CN201680136U (en) | 2010-12-22 |
Family
ID=43345180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201409408U Expired - Fee Related CN201680136U (en) | 2010-03-25 | 2010-03-25 | Oil pump with variable oil discharge quantity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201680136U (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162385A (en) * | 2011-03-29 | 2011-08-24 | 浙江平柴泵业有限公司 | Variable oil pump |
| CN102425718A (en) * | 2011-12-12 | 2012-04-25 | 湖南机油泵股份有限公司 | Variable displacement vane oil pump directly driven by crank shaft flat block |
| CN103363279A (en) * | 2012-04-05 | 2013-10-23 | 同济大学 | Blade type stepless variable oil pump controlled by stepping motor |
| CN103742774A (en) * | 2013-12-26 | 2014-04-23 | 东风汽车公司 | Variable displacement oil pump with pressure relief groove |
| CN103742776A (en) * | 2013-12-25 | 2014-04-23 | 浙江吉利控股集团有限公司 | Displacement variable oil pump and control method thereof |
| CN105257969A (en) * | 2015-10-08 | 2016-01-20 | 东风汽车泵业有限公司 | Rotor variable pump |
| CN107606459A (en) * | 2017-08-21 | 2018-01-19 | 王道红 | A kind of big flow internal combustion engine lubricating oil pump |
| CN108916628A (en) * | 2018-07-10 | 2018-11-30 | 浙江平柴泵业有限公司 | A kind of efficient engine oil pump |
| CN110486272A (en) * | 2017-08-29 | 2019-11-22 | 熵零技术逻辑工程院集团股份有限公司 | A kind of engine actively becomes discharge capacity oil feed pump |
| CN111425752A (en) * | 2020-05-08 | 2020-07-17 | 湖南机油泵股份有限公司 | Variable-displacement rotor oil pump |
| CN112283054A (en) * | 2020-10-12 | 2021-01-29 | 国家电投集团广西金紫山风电有限公司 | Waste oil discharge control method, device, equipment and medium |
| CN113638786A (en) * | 2021-08-12 | 2021-11-12 | 安徽江淮汽车集团股份有限公司 | Variable displacement rotor oil pump |
| CN113915509A (en) * | 2021-09-30 | 2022-01-11 | 宋宇希 | Variable-displacement rotor oil pump |
| CN114183678A (en) * | 2022-01-17 | 2022-03-15 | 湖南工业职业技术学院 | Variable displacement oil pump |
-
2010
- 2010-03-25 CN CN2010201409408U patent/CN201680136U/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162385A (en) * | 2011-03-29 | 2011-08-24 | 浙江平柴泵业有限公司 | Variable oil pump |
| CN102425718A (en) * | 2011-12-12 | 2012-04-25 | 湖南机油泵股份有限公司 | Variable displacement vane oil pump directly driven by crank shaft flat block |
| CN102425718B (en) * | 2011-12-12 | 2014-09-03 | 湖南机油泵股份有限公司 | Variable displacement vane oil pump directly driven by crank shaft flat block |
| CN103363279A (en) * | 2012-04-05 | 2013-10-23 | 同济大学 | Blade type stepless variable oil pump controlled by stepping motor |
| CN103363279B (en) * | 2012-04-05 | 2016-09-07 | 同济大学 | A kind of vane type stepless variable lubricating oil pump of step motor control |
| CN103742776A (en) * | 2013-12-25 | 2014-04-23 | 浙江吉利控股集团有限公司 | Displacement variable oil pump and control method thereof |
| CN103742774A (en) * | 2013-12-26 | 2014-04-23 | 东风汽车公司 | Variable displacement oil pump with pressure relief groove |
| CN105257969A (en) * | 2015-10-08 | 2016-01-20 | 东风汽车泵业有限公司 | Rotor variable pump |
| CN105257969B (en) * | 2015-10-08 | 2017-07-14 | 东风汽车泵业有限公司 | A kind of Rotor-type variable pump |
| CN107606459A (en) * | 2017-08-21 | 2018-01-19 | 王道红 | A kind of big flow internal combustion engine lubricating oil pump |
| CN110486272A (en) * | 2017-08-29 | 2019-11-22 | 熵零技术逻辑工程院集团股份有限公司 | A kind of engine actively becomes discharge capacity oil feed pump |
| CN108916628A (en) * | 2018-07-10 | 2018-11-30 | 浙江平柴泵业有限公司 | A kind of efficient engine oil pump |
| CN108916628B (en) * | 2018-07-10 | 2019-12-31 | 浙江平柴泵业有限公司 | Efficient oil pump |
| CN111425752A (en) * | 2020-05-08 | 2020-07-17 | 湖南机油泵股份有限公司 | Variable-displacement rotor oil pump |
| CN112283054A (en) * | 2020-10-12 | 2021-01-29 | 国家电投集团广西金紫山风电有限公司 | Waste oil discharge control method, device, equipment and medium |
| CN112283054B (en) * | 2020-10-12 | 2024-01-30 | 国家电投集团广西金紫山风电有限公司 | Waste oil discharge control method, device, equipment and medium |
| CN113638786A (en) * | 2021-08-12 | 2021-11-12 | 安徽江淮汽车集团股份有限公司 | Variable displacement rotor oil pump |
| CN113638786B (en) * | 2021-08-12 | 2022-08-16 | 安徽江淮汽车集团股份有限公司 | Variable displacement rotor oil pump |
| CN113915509A (en) * | 2021-09-30 | 2022-01-11 | 宋宇希 | Variable-displacement rotor oil pump |
| CN114183678A (en) * | 2022-01-17 | 2022-03-15 | 湖南工业职业技术学院 | Variable displacement oil pump |
| CN114183678B (en) * | 2022-01-17 | 2022-06-21 | 湖南工业职业技术学院 | Variable displacement oil pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201680136U (en) | Oil pump with variable oil discharge quantity | |
| CN103775811A (en) | Oil pump with variable displacement | |
| CN109026710A (en) | A kind of Roots's hydrogen circulating pump radial seal and Roots's hydrogen circulating pump | |
| CN103363279B (en) | A kind of vane type stepless variable lubricating oil pump of step motor control | |
| CN202867198U (en) | Low-pressure oil-injection screw compressor | |
| CN108662424A (en) | A kind of rotor-type oil pump that can improve cavitation erosion | |
| CN104653996A (en) | Two-stage variable displacement oil pump | |
| CN207132076U (en) | A kind of duplex lubricating oil pump of variable displacement | |
| CN203797312U (en) | Vane-type displacement-variable oil pump | |
| CN103742775A (en) | Vane variable displacement oil pump | |
| CN104100825B (en) | Displacement-variable oil pump | |
| CN213088226U (en) | Double-cavity controlled swing type variable displacement vane pump | |
| CN208605239U (en) | A kind of direct-push two-chamber pressurization becomes the control system of row's lubricating oil pump | |
| CN100390416C (en) | Variable volume flow rotor pump | |
| CN214464412U (en) | Roots type steam power machine | |
| CN1324220C (en) | Rotary-piston machinery | |
| CN208719808U (en) | A kind of rotor-type oil pump that can improve cavitation erosion | |
| CN2851653Y (en) | Offset type pin vane pump | |
| CN202900644U (en) | Segmental shaft-type vane pump | |
| CN208535542U (en) | A kind of secondary pressure change displacement oil pump control structure | |
| CN110500270B (en) | Bidirectional high-speed miniature plunger pump with inserted oil port | |
| CN104870820B (en) | Lubricating oil vane pump | |
| CN208670562U (en) | A kind of change displacement oil pump that can reduce abrasion | |
| CN203099277U (en) | Oil pump with changeable discharge capacity | |
| CN202302666U (en) | Displacement-variable oil pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Changsha Louli Mechanical and Electrical Technology Co., Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Changsha Louli Mechanical and Electrical Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20160325 |