CN2926663Y - Intelligent pneumatic spring - Google Patents
Intelligent pneumatic spring Download PDFInfo
- Publication number
- CN2926663Y CN2926663Y CN 200620034042 CN200620034042U CN2926663Y CN 2926663 Y CN2926663 Y CN 2926663Y CN 200620034042 CN200620034042 CN 200620034042 CN 200620034042 U CN200620034042 U CN 200620034042U CN 2926663 Y CN2926663 Y CN 2926663Y
- Authority
- CN
- China
- Prior art keywords
- piston
- gas spring
- intelligent gas
- air
- accessory
- 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
Abstract
The utility model provides an intelligent gas spring, which is an inner partitioning casing with internally mounted partition and piston, comprising of a main air chamber, an auxiliary air chamber, a mixing chamber, and an accessory chamber which is respectively communicated with a main through hole, an auxiliary airway, a mixing airway and an accessory trough hole. The partition has a stroke valve which is adaptable with a damping cylinder on the piston, can open or close the accessory airway and mixing airway automatically with the change of road condition in an accurate and timely manner, accomplishing the purpose of regulating the rigidity of the intelligent gas spring automatically to adapt for the change of road condition. The utility model has the property of intelligentized and automated rigidity regulation, with superior damping property and without the need to configure a damper, which is possible to ensure the comfort of riding and good steering stability while riding on a variety of complicated road condition. The utility model is of a simple structure, allows very low production and maintenance fee, which can be widely used in various types of vehicle installation with the advantages of high precision and reliability in rigidity regulation, safe and reliable operation, small cubage and flexible space arrangement.
Description
Technical field:
The utility model relates to the automotive suspension system and device, belongs to the technical field of automotive engineering, and specifically a kind of intelligent gas spring is specially adapted to automobile traveling mechanism and installs and uses.
Background technique:
We know that automotive industry is one of the swiftest and the most violent industry of the current development of China, and tracing it to its cause mainly is the high speed development of China's communication and the objective demand that people's living standard improves constantly.Just present, the past has been popularized the means of transportation that becomes people's daily life gradually as the car of high-grade luxury goods and microbus, and people pursue the travelling comfort taken and the stationarity of manipulation more when going on a journey by bus.In general, vehicle in the process of moving, wheel will rise and fall with the road surface, vehicle frame is produced impact every now and then, this impact energy mainly is to be absorbed by the elastic element in the automobile suspension system, and the vibration of vehicle frame is decayed by vibration damper.So-called suspension system elastic element is exactly the carrying power transmission damping device that is connected between the upper and lower swing arm of automobile, the technical performance of suspension directly influences the riding comfort of automobile and handles stationary performance, being a very important parameter weighing the automotive engineering quality index, also is the important evidence that the Consumer chooses vehicle.Up to now, the elastic element that uses in existing automobile suspension system has several types such as helical spring, hydro-pneumatic spring and pneumatic spring, simple in structure, advantages of cheap price that helical spring has, but its elasticity coefficient is fixed, its rigidity does not change with road conditions complicated and changeable, buffering and damping effect is relatively poor, needs to dispose in addition vibration damper in actual use.Active suspensions such as hydro-pneumatic spring and pneumatic spring vibration damper assembly are guaranteeing to possess good control stability under the prerequisite of riding comfort, but, it must cooperate with computer controlled system and could change spring rate and damping damping constant at regular time and quantity with road condition change, its complex structure, maintenance difficult, cost an arm and a leg, only limitation is used in comparatively on the top-of-the-range version at present.Chinese patent CN2700639Y discloses the utility model patent that a kind of name is called " the pneumatic spring vibration damper that becomes rigidity and change damping automatically ", its feature is: have the pneumatic spring of air valve ASSY and design to have the vibration damper of orifice valve assembly integrated design, the main gas tank of the pneumatic spring of being separated by piston and the lower oil chamber of fluid vibration damper are separated type coenosarc structure, vehicle is when wheel rise and fall to drive piston and moves up and down with the road surface under steam, it can regulate the rigidity of variation pneumatic spring automatically and the damping of fluid vibration damper adapts to road conditions, has greatly improved the travelling comfort and the stationarity of automobile running.But, this " becoming the pneumatic spring vibration damper of rigidity and change damping automatically " exists the technical problem of " adjusting changes rigidity and damping causes gas leakage because piston frequently moves back and forth " in actual use, so far still be difficult to thorough solution, cause this product on promoting the use of, to have certain narrow limitation.
The model utility content:
The utility model is intended to overcome that the deficiencies in the prior art part proposes that a kind of structure is very simple and direct, low cost of manufacture, volume compact space flexible arrangement, can be applicable to the intelligent gas spring that various vehicles assemblings are used.
It is achieved by the following technical solution:
It is the inner cylinder body dividing plate being installed in housing and being fitted with piston separate housing serve as reasons main through hole, auxilliary air flue, mix main gas tank, auxilliary air chamber, air mixing chamber, accessory air-space that air flue, secondary through hole are communicated with, it is characterized in that: the stroke valve that opens and closes auxilliary air flue and mixed air flue is installed on dividing plate, on piston, does the damped cylinder that adapts with the stroke valve.When installing and using intelligent gas spring, be fixedly connected on the top link of vehicle frame by the screw rod of case top, the following swing arm that again piston rod is fixedly connected on automotive wheel gets final product.When travelling on the road surface that automobile is rising and falling, wheel will move along inner cylinder body is upper and lower by the piston rod drive piston that is connected with following swing arm along with the road surface rises and falls, and promptly show as the compression or the elongation of intelligent gas spring.Less when the upper and lower mobile range of piston, the stroke valve that is installed on dividing plate does not enter that section stroke in the damped cylinder of piston soft stroke, and when the upper and lower mobile range of piston is bigger, the stroke valve enters interior that section stroke of the damped cylinder of piston hard stroke.It is work like this: travel on automobile is rising and falling less road surface, wheel is less with the amplitude that road surface fluctuating drive piston moves up and down, the stroke valve does not enter in the damped cylinder of piston, be compression and the elongation of intelligent gas spring in soft stroke: the stroke valve is in the opening state that is communicated with auxilliary air flue and mixed air flue, at this moment main gas tank, auxilliary air chamber, air mixing chamber and accessory air-space are communicating state with the compression to piston of the gas fellowship of larger volume, and on the piston, the lower end surface is subjected to rightabout gas pressure in main gas tank and the accessory air-space respectively, the useful area of the actual pressurized of piston only is the area of section of piston rod, that is to say compression or when elongation of intelligent gas spring in soft stroke, its rigidity is very little, shows as to satisfy well to have good riding comfort when automobile is crossed middle-size and small-size obstacle with middle low speed; When automobile drives towards when crossing big obstacle or falling into big pit downwards in that the road surface of big rise and fall is up, wheel rise to drive amplitude that piston moves up when big with respect to vehicle frame, the stroke valve enters the interior process of damped cylinder of piston, the compression that is intelligent gas spring in hard stroke: the spool of stroke valve is subjected to that the pressure of air dielectric moves up in the damped cylinder, to assist the blocking-up of air flue and mixed air flue immediately closes, at this moment have only the compression of the gas participation of smaller size smaller in main gas tank and the auxilliary air chamber to the piston upper-end surface, the elastic force of the main spring that the piston upper-end surface is made of the pressurized gas in main gas tank and the auxilliary air chamber will be with moving on the piston and increase rapidly, simultaneously the elastic force of air mixing chamber and accessory air-space auxiliary spring that piston lower surface is constituted also will be with moving on the piston and reduce, that is to say compressing section at hard stroke, because on piston, the master that the lower end surface constitutes, the auxiliary spring interact together, the rigidity of intelligent gas spring will automatically increase rapidly with the increase of compression stroke, the severe impact of being come by the wheel transmission when showing as intelligent gas spring and can bear and resist reposefully automobile and cross big obstacle or fall into big pit with middle low speed; After automobile is just being crossed big obstacle and pit, wheel drives piston with respect to vehicle frame decline and moves down, the process that the stroke valve withdraws from the damped cylinder of piston, it is the elongation of intelligent gas spring in hard stroke: intelligent gas spring changes elongation into by compression in hard stroke moment, pressure medium reduces in the damped cylinder, the spool of stroke valve will move down fast, open immediately and be communicated with auxilliary air flue and mixed air flue, at this moment main gas tank, auxilliary air chamber pressure reduces significantly, the elastic force and the rigidity of intelligent gas spring also reduce rapidly, show as that automobile has just cleared the jumps or pit after the vehicle frame acceleration that makes progress little, and after can avoiding wheel to clear the jumps liftoff trend is arranged, guarantee that automobile has the stationarity of good riding comfort and manipulation.
The utility model also has following technical characteristics:
In the damped cylinder of piston, fill fluid, can make the stroke valve when entering or withdraw from damped cylinder, spool can be fast in time, steady upper and lower reliably moving, can improve effectively intelligent gas spring in hard stroke compression or the working condition of elongation, improve to regulate the sensitive validity and the reliability of intelligent gas spring rigidity, further improve the riding comfort in the automobile running way and the stationarity of manipulation.
In air mixing chamber, accessory air-space, fill fluid, can guarantee the lubrication state of piston type frequently reciprocating, and can stop the pressurized gas in air mixing chamber, the accessory air-space to leak release of pressure effectively, guarantee the functional reliability of intelligent gas spring.
On housing, done the pressure regulation pore, aiming to connect to be equipped with used by the air inlet-outlet pipe of electromagnetic valve, can be by the electrical signal of executive circuit according to the overall height sensor acquisition, the control electromagnetic valve action is carried out aerating or exhaust to intelligent gas spring, can regulate the road clearance of automotive body easily, help by various roadblock things, and can on good road surface, run at high speed the time, turn down vehicle body easily, can reduce windage, shorten the soft stroke of intelligent gas spring, guarantee that automobile has good riding comfort and control stability in the way of running at high speed.
Be fitted with crashproof blob of viscose in the lower end of housing, can effectively prevent to cause down swing arm and lower end cap rigid collision because of wheel meets with large impact, and can slow down effectively just in case intelligent gas spring damages generation leakage release of pressure, vehicle frame stays the rigidity contact-impact that is caused fast.
On the spool of stroke valve, be fitted with spring, can make the valve core reset of stroke valve reliable rapidly, can improve the sensitive validity and the reliability of regulating intelligent gas spring rigidity effectively, further improve the riding comfort in the automobile running way and the stationarity of manipulation.
Substantive distinguishing features of the present utility model and remarkable progress are: the stroke valve that the damped cylinder with piston adapts is installed on dividing plate, the stroke valve can be automatically along with air flue is in time opened or closed to road condition change, in time change the gas volume that participates in Piston Compression, thereby realize automatically along with the purpose that the rigidity that changes intelligent gas spring adapts to road condition change is accurately regulated in the fluctuating on road surface.Its outstanding advantage is: when automobile in the process of moving, the fluctuations and the accurately and timely automatic rigidity of regulating intelligent gas spring of the various complex road surfaces of perception adapt to road condition change delicately for it, it has tangible intelligent control characteristic, guarantees that automobile has splendid riding comfort and good control stability.Its damping performance is very superior, it is distinctive follow automatically the road surface rise and fall the good damping performance of regulating its rigidity timely and accurately surmounted existing vibration damper institute greatly can role, need not to dispose again in addition dampening arrangement when as installed is used on automobile.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
The intelligent gas spring that the utility model proposed is to implement like this: it is to be installed with upper end cap 1, the housing 14 of lower end cap 11, on upper end cap 1, do the screw rod 23 that fixedly connected vehicle frame top link is used, at housing 14 internal fixation dividing plate 2 and the inner cylinder body 9 that is fitted with piston 6 are installed, housing 14 is divided into main gas tank 19, auxilliary air chamber 18, air mixing chamber 20 and accessory air-space 21, done connection main gas tank 19 at dividing plate 2, the main through hole 7 of auxilliary air chamber 18 and air mixing chamber 20, auxilliary air flue 16, mix air flue 15, on the wall of inner cylinder body 9, do the secondary through hole 13 that is communicated with air mixing chamber 20 and accessory air-space 21, on dividing plate 2, be installed with to control and open the stroke valve 3 that is communicated with or closes auxilliary air flue 16 of blocking-up and mixed air flue 15, on piston 6, do the damped cylinder 22 that adapts with stroke valve 3, at damped cylinder 22, annotate in air mixing chamber 20 and the accessory air-space 21 fluid is housed, piston rod 8 lower ends of piston 6 are fitted with the coupling 5 of swing arm under the fixedly connected wheel, when on automobile, installing and using the intelligent gas spring that the utility model proposes, be fixedly connected on the top link of vehicle frame with screw rod 23, the following swing arm that is fixedly connected on automotive wheel with the equipped coupling 5 in piston rod 8 lower ends gets final product again.When travelling on the road surface that automobile is rising and falling, wheel drives piston 6 along inner cylinder body 9 upper and lower moving along with the road surface rises and falls by piston rod 8, promptly shows as the compression or the elongation of intelligent gas spring.Now its working principle under different road conditions is expressed as follows:
Compression and the elongation of intelligent gas spring in soft stroke:
On rising and falling less road surface, automobile travels, the amplitude that wheel drive piston 6 moves up and down is less, stroke valve 3 does not enter in the damped cylinder 22 of piston 6, at this moment stroke valve 3 is in the opening state that is communicated with auxilliary air flue 16 and mixed air flue 15, main gas tank 19, auxilliary air chamber 18, air mixing chamber 20 and accessory air-space 21 are communicating state will be with the compression to piston 6 of the gas fellowship of larger volume, and on the piston 6, the lower end surface is subjected to rightabout gas pressure in main gas tank 19 and the accessory air-space 21 respectively, the useful area of piston 6 pressurizeds only is the area of section of piston rod 8, compression or when elongation of intelligent gas spring in soft stroke, external general performance is that its rigidity is very little, can satisfy well to have good riding comfort when automobile is crossed middle-size and small-size obstacle with middle low speed.
The compression of intelligent gas spring in hard stroke:
When automobile is upwards crossed big obstacle or fallen into big pit, when wheel rises with respect to vehicle frame, the amplitude that wheel drive piston 6 moves up is bigger, when stroke valve 3 enters in the damped cylinder 22 of piston 6, the pressure that the spool 4 of stroke valve 3 is subjected to damped cylinder 22 inner fluid media moves up, to assist air flue 16 immediately closes with mixed air flue 15 blocking-up, at this moment have only the compression of the gas participation of smaller size smaller in main gas tank 19 and the auxilliary air chamber 18 to piston 6 upper-end surfaces, the elastic force of the main spring that pressurized gas constitutes piston 6 upper-end surfaces will be with moving on the piston 6 and increase rapidly, simultaneously the elastic force of pressurized gas in air mixing chamber 20 and the accessory air-space 21 and fluid auxiliary spring that piston 6 lower end surfaces are constituted also will be with moving on the piston 6 and reduce, the rigidity of intelligent gas spring will automatically increase rapidly with the increase of compression stroke, and the external general performance of intelligent gas spring is: the severe impact of being come by the wheel transmission when it can bear and resist reposefully automobile and crosses big obstacle with middle low speed or fall into big pit.
The elongation of intelligent gas spring in hard stroke:
When automobile is crossed big obstacle or big pit rear wheel and is descended with respect to vehicle frame, wheel drives piston 6 and moves down, when stroke valve 3 withdraws from the damped cylinder 22 of piston 6, damped cylinder 22 inner fluid pressure mediums reduce, the spool 4 of stroke valve 3 will move down fast, open immediately and be communicated with auxilliary air flue 16 and mixed air flue 15, at this moment main gas tank 19, auxilliary air chamber 18, air mixing chamber 20 and accessory air-space 21 recover communicating state again, the rigidity of intelligent gas spring is also decreased and reduce with the increase of extended travel, intelligent gas spring can in time extend after showing as wheel and crossing big obstacle or big pit, wheel can be descended by close proximity to ground, avoid car body to dive downwards, and the vehicle frame acceleration that makes progress is little after wheel is crossed pit, guarantees that automobile crosses under steam and has the stationarity of good riding comfort and manipulation when big obstacle falls into big pit.
On housing 14, do to aim at and connect the pressure regulation pore 10 that equipped air inlet-outlet pipe is used, by the electrical signal of executive circuit according to the overall height sensor acquisition, intelligent gas spring is carried out aerating or bleeding, the adjustable height of can regulate vehicle body, help by various roadblock things, when under good road conditions, running at high speed, adjustable low, reduce windage, guarantee that automobile has good riding comfort and control stability in the way of running at high speed.
Also can the air passage structure that the main through hole 7 of main gas tank 19 with auxilliary air chamber 18 is designed to be subjected to the electromagnetic valve keying will be communicated with, in automobile turning, starting, urgency in a flash, main through hole 7 is closed in the solenoid valve action, at this moment has only the compression of the gas participation piston in the main gas tank 19, so the elastic force increase is very fast, and the elastic force of the auxiliary spring that is made of auxilliary air chamber 18 air mixing chambers 20 and accessory air-space 21 reduces with the compression of intelligent gas spring, intelligent gas spring shows as has very big compression stiffness, can prevent automobile generation turning inclination, starting recoil and the anxious phenomenon of stopping and nodding effectively.
In sum, the vehicle that the intelligent gas spring that the utility model proposes is installed can be according to the variation of various complex road conditions, the rigidity of accurately and timely regulating intelligent gas spring automatically adapts to its road condition change, have very superior damping performance, can guarantee that fully vehicle travels and all has splendid riding comfort and good control stability under various road conditions complicated and changeable.
Claims (6)
1. intelligent gas spring, it be the inner cylinder body (9) dividing plate (2) being installed in housing (14) and being fitted with piston (6) separate housing (14) serve as reasons main through hole (7), auxilliary air flue (16), mix main gas tank (19) that air flue (15), secondary through hole (13) be communicated with, assist air chamber (18), air mixing chamber (20), accessory air-space (21), it is characterized in that: the stroke valve (3) that opens and closes auxilliary air flue (16) and mixed air flue (15) is installed on dividing plate (2), on piston (6), does the damped cylinder (22) that adapts with stroke valve (3).
2. intelligent gas spring according to claim 1 is characterized in that: fill fluid in the damped cylinder (22) of piston (6).
3. intelligent gas spring according to claim 1 and 2 is characterized in that: fill fluid at air mixing chamber (20), accessory air-space in (21).
4. intelligent gas spring according to claim 1 and 2 is characterized in that: done pressure regulation pore (10) on housing (14).
5. intelligent gas spring according to claim 1 and 2 is characterized in that: be fitted with crashproof blob of viscose (12) in the lower end of housing (14).
6. intelligent gas spring according to claim 1 and 2 is characterized in that: be fitted with spring (17) on the spool (4) of stroke valve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034042 CN2926663Y (en) | 2006-04-29 | 2006-04-29 | Intelligent pneumatic spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034042 CN2926663Y (en) | 2006-04-29 | 2006-04-29 | Intelligent pneumatic spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2926663Y true CN2926663Y (en) | 2007-07-25 |
Family
ID=38280907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620034042 Expired - Fee Related CN2926663Y (en) | 2006-04-29 | 2006-04-29 | Intelligent pneumatic spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2926663Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330787A (en) * | 2011-06-22 | 2012-01-25 | 贺劼 | Air spring of filling and displacement static and dynamic rigidity combined regulation |
| CN102401072A (en) * | 2011-06-21 | 2012-04-04 | 贺劼 | Air spring with static stiffness adjusted by filling liquid and dynamic stiffness adjusted along with displacement |
| CN102401074A (en) * | 2011-06-21 | 2012-04-04 | 贺劼 | Air spring for adjusting dynamic stiffness along with displacement of air bag |
| CN102401063A (en) * | 2011-07-17 | 2012-04-04 | 贺劼 | Air spring with dynamic stiffness adjusted by using auxiliary air chamber and pressure limiting and impact reducing combination |
| CN102661345A (en) * | 2012-05-10 | 2012-09-12 | 深圳市泰玛风光能源科技有限公司 | Magnetic suspension damping device |
| CN105351421A (en) * | 2015-11-19 | 2016-02-24 | 成都九十度工业产品设计有限公司 | Hydro-pneumatic suspension device |
| CN107757290A (en) * | 2017-10-31 | 2018-03-06 | 杭州极木科技有限公司 | A kind of adjustable draft hitch of heavily loaded wheeled robot |
| CN113423969A (en) * | 2019-02-25 | 2021-09-21 | 威巴克欧洲股份公司 | Air spring module |
-
2006
- 2006-04-29 CN CN 200620034042 patent/CN2926663Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401072A (en) * | 2011-06-21 | 2012-04-04 | 贺劼 | Air spring with static stiffness adjusted by filling liquid and dynamic stiffness adjusted along with displacement |
| CN102401074A (en) * | 2011-06-21 | 2012-04-04 | 贺劼 | Air spring for adjusting dynamic stiffness along with displacement of air bag |
| CN102330787A (en) * | 2011-06-22 | 2012-01-25 | 贺劼 | Air spring of filling and displacement static and dynamic rigidity combined regulation |
| CN102401063A (en) * | 2011-07-17 | 2012-04-04 | 贺劼 | Air spring with dynamic stiffness adjusted by using auxiliary air chamber and pressure limiting and impact reducing combination |
| CN102661345A (en) * | 2012-05-10 | 2012-09-12 | 深圳市泰玛风光能源科技有限公司 | Magnetic suspension damping device |
| CN105351421A (en) * | 2015-11-19 | 2016-02-24 | 成都九十度工业产品设计有限公司 | Hydro-pneumatic suspension device |
| CN107757290A (en) * | 2017-10-31 | 2018-03-06 | 杭州极木科技有限公司 | A kind of adjustable draft hitch of heavily loaded wheeled robot |
| CN107757290B (en) * | 2017-10-31 | 2023-12-26 | 杭州极木科技有限公司 | Adjustable suspension device of heavy-duty wheeled robot |
| CN113423969A (en) * | 2019-02-25 | 2021-09-21 | 威巴克欧洲股份公司 | Air spring module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100460706C (en) | Intelligent gas spring | |
| CN2926663Y (en) | Intelligent pneumatic spring | |
| CN106183685B (en) | Suspension, body stabilization system and automobile | |
| CN202468817U (en) | Novel damper with adjustable damping | |
| CN201377535Y (en) | Double-cylinder shock absorber | |
| CN201539525U (en) | Split-type shock absorber with adjustable damping | |
| CN101408235A (en) | Novel adjustable vibration damper and follow-up damp-regulating volume control method | |
| CN2700639Y (en) | Air spring shock damper capable of changing toughness and damping automatically | |
| CN103542033A (en) | Single drum shock absorber | |
| CN2844566Y (en) | Automobile damping spring rigidity controlling device | |
| CN203114998U (en) | Damping-adjustable inflatable absorber | |
| CN202100650U (en) | Multi-stage damping manual adjustable vibration damper | |
| CN201125980Y (en) | Adjustable damping hydraulic damper | |
| CN2607478Y (en) | Air vibration damper | |
| CN103661110B (en) | A kind of low wind is made an uproar automobile outer rear-view mirror | |
| CN107654558A (en) | A kind of vehicle shock absorber | |
| CN2509006Y (en) | Absorptive power type vehicle body attitude control apparatus | |
| CN200985974Y (en) | Gas spring | |
| CN2619849Y (en) | Oil hydraulic vibration damper | |
| CN2881212Y (en) | Regulatable restoration buffer valve of hydraulic shock absorber | |
| CN207539249U (en) | A kind of vehicle shock absorber | |
| CN203431088U (en) | Rubber support for automobile damper | |
| CN204985498U (en) | Hydraulic pressure linkage and car | |
| CN201747843U (en) | Adjustable shock absorber | |
| CN203888567U (en) | Automobile suspension height control valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070725 |