CN202510440U - Differential balance valve, and hydraulic equipment and engineering machinery provided with balance valve - Google Patents
Differential balance valve, and hydraulic equipment and engineering machinery provided with balance valve Download PDFInfo
- Publication number
- CN202510440U CN202510440U CN2012200834442U CN201220083444U CN202510440U CN 202510440 U CN202510440 U CN 202510440U CN 2012200834442 U CN2012200834442 U CN 2012200834442U CN 201220083444 U CN201220083444 U CN 201220083444U CN 202510440 U CN202510440 U CN 202510440U
- Authority
- CN
- China
- Prior art keywords
- valve
- differential
- oil
- oil circuit
- balance
- 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
- Safety Valves (AREA)
Abstract
The utility model provides a differential balance valve, and hydraulic equipment and engineering machinery which are provided with the balance valve. The differential balance valve comprises a valve body as well as a first oil channel, a second oil channel, a third oil channel and a fourth oil channel which are formed in the valve body, wherein a second assembly unit is arranged on the second oil channel and comprises a second check valve and a balance valve; the second check valve is connected in parallel with the balance valve; and a first assembly unit is also arranged on the third oil channel and comprises a first check valve and a differential valve, and the first check valve is connected in series with the differential valve. By the differential balance valve, the balance of another oil port is unidirectionally adjustable while a pressure maintaining function of an oil port is realized. Moreover, the oil channel design of the differential balance valve is simplified; and the differential balance valve is convenient to maintain and install.
Description
Technical field
The utility model relates to the hydraulic equipment technical field, relates in particular to a kind of differential balance valve, the hydraulic equipment with this equilibrium valve and engineering machinery.
Background technique
At present, the control equilibrium valve that hoist is used in big arm telescopic oil cylinder all is the equilibrium valve of common form, is installed in the rodless cavity in-line, and the guide of equilibrium valve controls oil and introduces from the in-line of rod chamber.The rodless cavity oil-feed is directly pushed one-way valve open and is got final product; And during the rod chamber oil-feed, the equilibrium valve that oil return is pushed open through the pressure oil that is come by the rod chamber oil-feed flows back to system.
Stretch out, withdraw and keep moving because the big arm telescopic oil cylinder of hoist is done in luffing operating mode back warp regular meeting; Stretching out motion and extended position stops time requirement telescopic cylinder to remain on original position motionless; And when withdrawal, require that pulsation can not be arranged; Can not dash down, because the pulsation of telescopic cylinder can cause the big arm jitter phenomenon of hoist, this will be avoided in the crane job operating mode as far as possible.And when big arm operation, requiring the time of stretching out of telescopic cylinder short as far as possible, overlong time is unfavorable for improving operating efficiency.And the shear leg operation belongs to the high risk operation, thereby requires the luffing control oil channel to have the characteristics of high reliability.
The model utility content
The purpose of the utility model is to provide a kind of installation and maintenance convenience, the differential balance valve that working performance is good and reliability is high and hydraulic equipment and the engineering machinery with this equilibrium valve.
First aspect the utility model discloses a kind of differential balance valve, comprising: valve body and be arranged at first oil circuit, second oil circuit, the 3rd oil circuit and the 4th oil circuit in the said valve body; Said second oil circuit is provided with second combining unit, and said second combining unit comprises second one-way valve and equilibrium valve; Said second one-way valve and the parallel connection of said equilibrium valve; And, also being provided with first combining unit on said the 3rd oil circuit, said first combining unit comprises first one-way valve and differential valve, said first one-way valve and the series connection of said differential valve.
Preferably, in said first combining unit of above-mentioned differential balance valve, said differential valve comprises differential valve pocket, pressure adjusting spring, differential valve seat and differential spool; And the outside of said differential valve pocket is fixedly connected said differential valve through screw thread, and said differential valve seat is installed on the said differential valve pocket, and said pressure adjusting spring is arranged between said differential valve pocket and the said differential spool; Said differential spool is pressed on the step surface of said differential valve seat through said pressure adjusting spring.
Preferably, in the above-mentioned differential balance valve, the spring chamber of said pressure adjusting spring is provided with a control oil and goes into the chamber oil duct; Said control oil is gone into the chamber oil duct through the 3rd oil duct and said first one-way valve and said the 4th oil circuit UNICOM; And said control oil is gone into the guide of chamber oil duct through the equilibrium valve in damping hole and said second combining unit and is controlled oil pocket UNICOM.
Preferably, in the above-mentioned differential balance valve, in said first combining unit, said first one-way valve comprises the first unidirectional valve pocket, the first unidirectional valve seat, first nonreturn valve core and first Returnning spring; Said first Returnning spring is arranged between the said first unidirectional valve pocket and said first nonreturn valve core, and said first nonreturn valve core is pressed on the conical surface of the said first unidirectional valve seat through said first Returnning spring.
Preferably, in the above-mentioned differential balance valve, in said second combining unit, said equilibrium valve comprises: guide's pole socket, guide's spool,, balance valve body, balance valve core, Regulation spring, balance valve pocket,, adjusting screw rod, pressure adjusting spring seat and damper rod; Wherein, Said pressure adjusting spring seat is installed in the said balance valve pocket; In the rear end of said pressure adjusting spring said screw press is installed; Said Regulation spring is arranged between said pressure adjusting spring seat and the said balance valve core, and said Regulation spring is pressed on said balance valve core on the conical surface of said balance valve body; Said guide's spool is arranged between said guide's oil suction chamber and the said nonreturn valve core, is pressed in said guide's pole socket through said Regulation spring; Said damper rod is installed between guide's oil suction chamber and the 3rd oil circuit.
Preferably, in the above-mentioned differential balance valve, in said second combining unit, said second one-way valve comprises the second unidirectional valve seat, the second unidirectional valve pocket, second Returnning spring and second nonreturn valve core; Said second Returnning spring is arranged between the said second unidirectional valve pocket and said second nonreturn valve core, and said second nonreturn valve core is through the conical surface of the said second unidirectional valve seat of being pressed on of said second Returnning spring, to block the UNICOM of first oil circuit and second oil circuit.
On the other hand, the utility model also provides a kind of hydraulic equipment, and said hydraulic equipment comprises above-mentioned each described differential balance valve.
The third aspect, the utility model also provide a kind of engineering machinery, comprise above-mentioned hydraulic equipment.
In the utility model; Comprise owing to comprise first combining unit and the one-way valve of the series connection of forming by one-way valve and differential valve and second combining unit of the parallel connection that equilibrium valve is formed; Thereby; Pressure when the utility model can be regulated operation according to the system actual demand, can realize: 1) but at a unidirectional balancing of hydraulic fluid port pressure holding function another hydraulic fluid port of while; 2) a hydraulic fluid port oil-feed realizes the differential speed accelerating function.Simultaneously, the hydraulic element that the utility model can be used as a standard use, and simplify the oil circuit design, convenient for maintaining and installation.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the utility model embodiment's a structural representation;
Fig. 2 is an A-A sectional view embodiment illustrated in fig. 1;
Fig. 3 is the utility model embodiment's a fundamental diagram.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technological scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
With reference to Fig. 1, Fig. 2, a kind of differential balance valve comprises valve body, on valve body, is provided with A oil circuit (first oil circuit) 7, B oil circuit (second oil circuit) 5, C oil circuit (the 3rd oil circuit) 3 and D oil circuit (the 4th oil circuit) 2.On C oil circuit (the 3rd oil circuit) 3, be provided with first combining unit of first one-way valve 1 and differential valve 8 series connection, on B oil circuit 5, be provided with second combining unit of second one-way valve 6 and equilibrium valve 4 parallel connections.
In second combining unit, second one-way valve 6 comprises the second unidirectional valve seat 6-1, the second unidirectional valve pocket 6-2, the second Returnning spring 6-3, the second nonreturn valve core 6-4; Equilibrium valve 4 comprises guide's pole socket 4-1, guide's spool 4-2, guide's spool guide holder 4-3, balance valve body 4-4, balance valve core 4-5, Regulation spring 4-6, balance valve pocket 4-7, adjusting screw rod seat 4-8, adjusting screw rod 4-9, pressure adjusting spring seat 4-10 and damper rod 9.
Wherein, pressure adjusting spring seat 4-10 is installed among the balance valve pocket 4-7, in the rear end of pressure adjusting spring 4-6 screw press 4-9 is installed, and can regulate the pressure of pressure adjusting spring 4-6 through screw press 4-9.Pressure adjusting spring 4-6 is arranged between pressure adjusting spring seat 4-10 and the balance valve core 4-5, and pressure adjusting spring 4-6 is pressed on balance valve core 4-5 on the conical surface of balance valve body 4-4, blocking-up oil inlet and outlet UNICOM.Guide's spool 4-2 is contained between guide's oil suction chamber and the nonreturn valve core 4-5, acts on defeating tightly formerly on the guide rod seat 4-1 on the nonreturn valve core 4-5 through pressure adjusting spring 4-6.Damper rod 9 is installed between first guide cavity 10 and the C oil circuit 3.The second Returnning spring 6-3 is arranged between the second unidirectional valve pocket 6-2 and the second nonreturn valve core 6-4; The second nonreturn valve core 6-4 tightly is being pressed under the active force of the second Returnning spring 6-3 on the conical surface of the second unidirectional valve seat 6-1, the UNICOM of blocking-up A mouth oil circuit 7 and B mouth oil circuit 5.
Second one-way valve 6 with the working principle of second combining unit of equilibrium valve 4 parallel connections is: go up advection to A mouth oil circuit 7 from the force second nonreturn valve core 6-4 that comes fluid can directly overcome the second Returnning spring 6-3 of second one-way valve 6 of B mouth oil circuit 5.And,, form an one-way function so the fluid of A mouth oil circuit 7 can not directly be got back to B mouth oil circuit 5 because balance valve body 4-4 and balance valve core 4-5 form a normally closed conical surface seal under the effect of pressure adjusting spring 4-6.Formerly be provided with guide's valve rod 4-2 between guide cavity 10 and the balance valve core 4-5; Pressure oil can pass through the first guide cavity 10 promotion guide valve rod 4-2 of damper rod 9 entering and move to right; Open balance valve body 4-4 and balance valve core 4-5 and under the effect of pressure adjusting spring 4-6, form a normally closed conical surface seal, the fluid of A mouth oil circuit 7 is directly got back to B mouth oil circuit 5 and is flowed back to system like this.Damper rod 9 is installed between first guide cavity 10 and the oil circuit 5, in order to prevent that first guide cavity 10 pressure jumps are with stable system.Spring force size according to outer need of load adjusting screw rod 4-9 meets the needs of so just forms an adjustable single to equilibrium function.
In first combining unit, first one-way valve 1 comprises the first unidirectional valve pocket 1-1, the first unidirectional valve seat 1-2, the first nonreturn valve core 1-3, the first Returnning spring 1-4; First differential valve 8 comprises that differential valve pocket 8-1, the first pressure adjusting spring 8-2, the first differential valve seat 8-3, the first differential spool 8-4 form.
Wherein, pressure adjusting spring 8-2 is arranged between differential valve pocket 8-1 and the differential spool 8-4, and pressure adjusting spring 8-2 is pressed on differential spool 8-4 on the step surface of differential valve seat, blocking-up oil inlet and outlet D oil circuit 2 and A oil circuit 7 UNICOMs.
The first Returnning spring 1-3 is arranged on single first between the valve pocket 1-1 and the first nonreturn valve core 1-4; The first nonreturn valve core 1-4 tightly is being pressed under the active force of the first Returnning spring 1-3 on the conical surface of the first unidirectional valve seat 1-2, the UNICOM of blocking-up C mouth oil circuit 3 and D mouth oil circuit 2.
First one-way valve 1 with the working principle of first combining unit of differential valve 8 series connection is: move down from the force nonreturn valve core 1-4 that comes fluid can directly overcome the Returnning spring 1-3 of first one-way valve 1 of C mouth oil circuit 3 and flow to D mouth oil circuit 2.Because differential valve seat 8-3 and differential spool 8-4 form a normally closed step surface sealing under the effect of pressure adjusting spring 8-2, so the fluid of A mouth oil circuit 7 can't directly flow to D mouth oil circuit 2.Differential spool epicoele has an oil duct and C mouth UNICOM, and the C mouth comes pressure oil, pushes down differential spool and definitely cuts off D mouth oil circuit 2 and A mouth oil circuit 7 UNICOMs, comes oil to act on the pressure height of differential spool only if D mouth oil circuit 2 oil act on differential spool pressure ratio C mouth.Move from the fuel-displaced promotion rodless cavity of A mouth oil circuit 7, rod chamber oil flows into D mouth oil circuit 2, and A mouth oil circuit 7 interflow are gone back in advection on the differential spool 8-4 of promotion under the pressure that does not have C mouth oil circuit 3, realize differential function.If make pressure adjusting spring 8-3 adjustable in pressure, the spring force size that then meets the needs of according to outer need of load adjusting screw rod 4-9.
With reference to Fig. 2 and Fig. 3, the working principle of the utility model is: system pressure oil gets into the valve piece from B mouth oil circuit 5, arrives second one-way valve, 6 cavity of resorptions; Overcome the active force of the second Returnning spring 6-3; Promote to move on the nonreturn valve core, get into A mouth oil circuit 7, because of under the effect of pressure adjusting spring 8-2; A mouth oil circuit 7 and 2 blocking-up of D mouth oil circuit, system pressure oil gets into actuator's working oil chamber; Actuator's backflow fluid is gone into D mouth oil circuit 2 and is got into the differential valve cavity of resorptions and overcome the pressure adjusting spring active force and promote to move on the differential spool and connect A mouth oil circuit 7 interflow, makes actuator quicken operation.Because the effect of first one-way valve 1 and second one-way valve 6, actuator can stop at arbitrary position.System pressure oil gets into the epicoele that the valve piece arrives first one-way valve 1 from C mouth oil circuit 3; The active force that overcomes Returnning spring 1-3 promotes nonreturn valve core 1-4 and moves down connection D mouth oil circuit 2; Because the system pressure of C mouth oil circuit 3 oil gets into the epicoele of differential spool 8-4; The UNICOM of absolute blocking-up D mouth oil circuit 3 and A mouth oil circuit 7, system pressure oil directly gets into actuator.So and because the first guide cavity 10 that the system pressure of C mouth oil circuit 3 oil gets into equilibrium valves through damping hole 9 overcomes the active force of pressure adjusting spring 4-6 promotes guide's spool 4-2 and move to right and connect A mouth oil circuit 7 and reflux with oil return connection system of B mouth oil circuit 5 actuators and form oil hydraulic circuit.
The utility model differential balance valve comprises owing to comprise first combining unit and the one-way valve of the series connection of being made up of one-way valve and differential valve and second combining unit of the parallel connection that equilibrium valve is formed; Thereby; Pressure when the utility model can be regulated operation according to the system actual demand, can realize: 1) but at a unidirectional balancing of hydraulic fluid port pressure holding function another hydraulic fluid port of while; 2) a hydraulic fluid port oil-feed realizes the differential speed accelerating function.And, can find out that by the foregoing description the utility model differential balance valve is compared with common equilibrium valve, has the advantages that to make actuator's operating efficiency high; And,, also have the high advantage of operational reliability because the utility model is inherited the security feature of flexible equilibrium valve fully.
On the other hand, the utility model also provides a kind of hydraulic equipment and engineering machinery with above-mentioned differential balance valve.Because the structure of differential balance valve has been done detailed explanation in the above, therefore, the utility model repeats no more at this.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (8)
1. a differential balance valve comprises valve body, and is arranged at first oil circuit (7), second oil circuit (5), the 3rd oil circuit (3) and the 4th oil circuit (2) in the said valve body; Said second oil circuit (5) is provided with second combining unit, and said second combining unit comprises second one-way valve (6) and equilibrium valve (4);
It is characterized in that,
Said second one-way valve (6) and said equilibrium valve (4) parallel connection; And,
Also be provided with first combining unit on said the 3rd oil circuit (3), said first combining unit comprises first one-way valve (1) and differential valve (8), said first one-way valve (1) and said differential valve (8) series connection.
2. differential balance valve according to claim 1 is characterized in that,
In said first combining unit,
Said differential valve (8) comprises differential valve pocket (8-1), pressure adjusting spring (8-2), differential valve seat (8-3) and differential spool (8-4); And
The outside of said differential valve pocket (8-1) is fixedly connected said differential valve (8) through screw thread; Said differential valve seat (8-3) is installed on the said differential valve pocket (8-1), and said pressure adjusting spring (8-2) is arranged between said differential valve pocket (8-1) and the said differential spool (8-4); Said differential spool (8-4) is pressed on the step surface of said differential valve seat (8-3) through said pressure adjusting spring (8-2).
3. differential balance valve according to claim 2 is characterized in that,
The spring chamber of said pressure adjusting spring (8-2) is provided with a control oil and goes into the chamber oil duct;
Said control oil is gone into the chamber oil duct through the 3rd oil duct (3) and said first one-way valve (1) and said the 4th oil circuit (2) UNICOM; And said control oil is gone into the guide of chamber oil duct through the equilibrium valve (4) in damping hole and said second combining unit and is controlled oil pocket UNICOM.
4. differential balance valve according to claim 1 is characterized in that,
In said first combining unit, said first one-way valve (1) comprises the first unidirectional valve pocket (1-1), the first unidirectional valve seat (1-2), first nonreturn valve core (1-3) and first Returnning spring (1-4);
Said first Returnning spring (1-4) is arranged between the said first unidirectional valve pocket (1-1) and said first nonreturn valve core (1-4), and said first nonreturn valve core (1-3) is pressed on the conical surface of the said first unidirectional valve seat (1-2) through said first Returnning spring (1-4).
5. differential balance valve according to claim 1 is characterized in that,
In said second combining unit,
Said equilibrium valve comprises: guide's pole socket (4-1), guide's spool (4-2), balance valve body (4-4), balance valve core (4-5), Regulation spring (4-6), balance valve pocket (4-7), adjusting screw rod (4-9), pressure adjusting spring seat (4-10) and damper rod (9); Wherein
Said pressure adjusting spring seat (4-10) is installed in the said balance valve pocket (4-7); In the rear end of said pressure adjusting spring (4-6) said screw press (4-9) is installed; Said Regulation spring (4-6) is arranged between said pressure adjusting spring seat (4-10) and the said balance valve core (4-5), and said Regulation spring (4-6) is pressed on said balance valve core (4-5) on the conical surface of said balance valve body (4-4);
Said guide's spool (4-2) is arranged between said guide's oil suction chamber (10) and the said nonreturn valve core (4-5), is pressed on said guide's pole socket (4-1) through said Regulation spring (4-6); And
Said damper rod (9) is installed between guide's oil suction chamber (10) and the 3rd oil circuit (3).
6. differential balance valve according to claim 1 is characterized in that,
In said second combining unit,
Said second one-way valve (6) comprises the second unidirectional valve seat (6-1), the second unidirectional valve pocket (6-2), second Returnning spring (6-3) and second nonreturn valve core (6-4);
Said second Returnning spring (6-3) is arranged between the said second unidirectional valve pocket (6-2) and said second nonreturn valve core (6-4); Said second nonreturn valve core (6-4) is through the conical surface that is pressed on the said second unidirectional valve seat (6-1) of said second Returnning spring (6-3), to block the UNICOM of first oil circuit (7) and second oil circuit (5).
7. a hydraulic equipment is characterized in that, said hydraulic equipment comprises like each described differential balance valve in the claim 1 to 6.
8. an engineering machinery is characterized in that, comprises hydraulic equipment as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200834442U CN202510440U (en) | 2012-03-07 | 2012-03-07 | Differential balance valve, and hydraulic equipment and engineering machinery provided with balance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200834442U CN202510440U (en) | 2012-03-07 | 2012-03-07 | Differential balance valve, and hydraulic equipment and engineering machinery provided with balance valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202510440U true CN202510440U (en) | 2012-10-31 |
Family
ID=47062930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200834442U Expired - Fee Related CN202510440U (en) | 2012-03-07 | 2012-03-07 | Differential balance valve, and hydraulic equipment and engineering machinery provided with balance valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202510440U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050784A (en) * | 2016-08-14 | 2016-10-26 | 宁波市博尔法液压有限公司 | Balance valve |
| CN107762998A (en) * | 2017-11-23 | 2018-03-06 | 宁波文泽机电技术开发有限公司 | Load-sensitive pressure filters valve |
-
2012
- 2012-03-07 CN CN2012200834442U patent/CN202510440U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050784A (en) * | 2016-08-14 | 2016-10-26 | 宁波市博尔法液压有限公司 | Balance valve |
| CN107762998A (en) * | 2017-11-23 | 2018-03-06 | 宁波文泽机电技术开发有限公司 | Load-sensitive pressure filters valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202673874U (en) | Constant-pressure variable control system of load sensitive hydraulic pump | |
| CN104047931B (en) | Three-way pressure compensating device assembly | |
| CN203976347U (en) | Aerial lift device and suspension arm variable-amplitude control system thereof | |
| CN103089729B (en) | Quantitative system load-sensitive multiple directional control valve | |
| CN104989690B (en) | Overload relief valve | |
| CN201636106U (en) | Oil returning and throttling multiple directional control valve with pressure compensation | |
| CN104047917A (en) | Flow distributor for construction machine | |
| CN202510440U (en) | Differential balance valve, and hydraulic equipment and engineering machinery provided with balance valve | |
| CN204096970U (en) | A kind of luffing range of cantilever support hydraulic efficiency pressure system of hoisting crane and hoisting crane | |
| CN104828702A (en) | Crane, reversing control system, and oil supply apparatus thereof | |
| CN103754804A (en) | Buffer control system of hydraulic aerial cage | |
| CN103244509A (en) | Tee-joint pressure compensator of metering pump load-sensitive hydraulic system | |
| CN104444816B (en) | The hydraulic control system of a kind of hoisting machinery and hoisting machinery | |
| CN202971075U (en) | Load sensitive pump, load sensitive hydraulic system and concrete pumping equipment | |
| CN102367818A (en) | Special integrated group valve for electrohydraulic push rod | |
| CN205207311U (en) | Meso position burden flow valve, swing arm energy -saving control system and excavator | |
| CN204646822U (en) | A kind of hydraulic control system for loader | |
| CN204175686U (en) | A kind of bender hydraulic system | |
| CN203879835U (en) | Balance valve, counterweight oil cylinder hydraulic control system and vertical support oil cylinder hydraulic control system | |
| CN203248435U (en) | Hydraulic driving system, boom system and concrete cloth device | |
| CN204664029U (en) | A kind of hydraulic balance system with emergency loop | |
| CN203081878U (en) | Hydraulic control system and engineering machine | |
| CN204253484U (en) | A kind of novel mass flow Bidirectional balanced valve | |
| CN202381432U (en) | Leveling overload valve and aerial work platform | |
| CN104653536B (en) | A kind of load-sensitive valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20150307 |
|
| EXPY | Termination of patent right or utility model |