CN202732820U - Pressure-stabilizing variable-frequency damper - Google Patents
Pressure-stabilizing variable-frequency damper Download PDFInfo
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- CN202732820U CN202732820U CN 201220415286 CN201220415286U CN202732820U CN 202732820 U CN202732820 U CN 202732820U CN 201220415286 CN201220415286 CN 201220415286 CN 201220415286 U CN201220415286 U CN 201220415286U CN 202732820 U CN202732820 U CN 202732820U
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Abstract
The utility model relates to automobile parts, in particular to a pressure-stabilizing variable-frequency damper. An inflating device is mounted on a cylinder pressure stabilizer of a pressure vessel, and two sides of the cylinder pressure stabilizer are communicated with two dampers respectively. Symmetrical balance ratio of resistance values of two sides of the pressure-stabilizing variable-frequency damper is guaranteed to reach 99% by means of equivalent factors of cylinder pressure of two sides, maneuvering capacity of a piston can be promoted to the field of stepless frequency variation by means of the unprecedented flexible converting technology, and the pressure-stabilizing variable-frequency damper is superior to the most advanced electronic-control suspension at present in terms of technical performances.
Description
Technical field
The utility model relates to automobile component, particularly a kind of stable voltage frequency conversion vibration damper.
Background technique
At present, all there are following technical bottleneck in mechanical-type vibration damper and electronic control shock absorber that automobile accessories use: 1, mechanical damper all is the individuality of independently working, there are not technical monitoring and regulation measure with symmetrical rate and the coefficient of stabilization of left and right sides Resistance Value after the automobile assembling, when vibration is travelled in the automobile generation, will monolaterally beat in one side that Resistance Value is on the low side.2, the compression valve of mechanical damper and stretching valve all can not be pressed stroke and the frequency requirement change damping flow of piston, cause automobile infinitely to reduce at the damping efficiency of bad road conditions with by performance.Although 3, electronic control shock absorber can be by the control signal of module, make stepping motor drive driveshaft and change the flow of valve opening, make piston obtain corresponding frequency speed, but, because the time delay of automatically controlled program and the narrow limitation of proposed for variable flow rate make the performance of electronic control shock absorber still not reach the motor-driven requirement of travelling of Hyundai Motor and technology upgrading requirement.
Chinese utility model patent 2010202724077 discloses a kind of energy-absorbing vibration damper of car on February 9th, 2011, the vibration damper of this structure has the functions such as air-pressure damping, bidirectional throttle, but also there is following shortcoming in its design: 1, the pilot seal circle does not have persistent self fastening function, causes the pressurize timeliness of precompressed gas not reach application requirements.2, compression valve and stretching valve all can not change the damping flow by the motor-driven requirement of piston, have restricted stroke and the frequency of piston, cause vibration damper infinitely to reduce at the damping efficiency of bad road conditions.3, after this vibration damper and the automobile assembling, left and right sides cylinder is pressed and symmetrical rate and the coefficient of stabilization of Resistance Value do not have technical monitoring and regulation measure, thereby has influence on stationarity and the travelling comfort of automobile.4, the Position Design of unidirectional gas charging valve does not meet maintenance requirement in the base axle center, when this vibration damper need to be inflated maintenance, the vibration damper base must be separated just with the assembling stand dismounting and can carry out charge operation.
The model utility content
The purpose of this utility model is to provide a kind of stable voltage frequency conversion vibration damper, and it is by stroke and the frequency of elasticity Semiconductor Converting Technology regulation and control piston, to adapt to the vibration damping requirement in extreme difference road conditions and the superelevation speed per hour situation.
The purpose of this utility model is achieved through the following channels: a kind of stable voltage frequency conversion vibration damper, and it is pressurized container that cylinder is pressed stabilizer, and cylinder is pressed on the stabilizer inflator is housed, and cylinder presses the stabilizer both sides to be communicated with a vibration damper by tracheae respectively;
Described vibration damper is that converter plant consists of by cylinder, piston work done device and valve, the guide holder interference is assemblied in cylinder head, the interference of cylinder seat is assemblied in cylinder bottom, assembling all-in-one-piece piston and piston rod are installed in the cylinder, piston rod is movably installed in the axle center hole of guide holder, the upper end screw rod of piston rod and the fastening assembling of vehicle body assembling stand, the assembling screw thread is established in cylinder seat lower end;
The epimere shaft core position of described piston is provided with valve pocket, axle center, valve pocket bottom pore is compression upper limit valve, the piston lower surface shaft core position is equipped with the compression variable flow valve, and valve pocket inside is equipped with stretching upper limit valve, the bonding stretching variable flow valve that is equipped with of the epimere body cavity of stretching upper limit valve; The positioning hole of piston-rod lower end face is withstood in the upper end of the pressure spring in the valve pocket, and the upper-end surface of stretching upper limit valve is pushed down in the lower end of pressure spring; In the annular groove of piston upper and lower end outer ring piston packing ring is installed, the stage casing groove of piston is the annular piston oil groove, is marked with lubricating grease in the annular piston oil groove, and the lower end of piston rod is equipped with limited location snap ring and spacing cushion rubber;
Described piston-rod lower end axle center is provided with the circulation pore, and the upper end of circulation pore is communicated with the upper cylinder half chamber of cylinder, and the lower end of circulation pore is communicated with lower cylinder chamber by valve pocket;
Described guide holder internal diameter is provided with annular guiding oil groove, be marked with lubricating grease in the guiding oil groove, guiding oil groove top is provided with self-tight oil seal, piston rod interference fit about the internal diameter of oil sealing in lip and the guide holder internal diameter, the upper-end surface axle center hole of the outer ring of oil sealing and guide holder is fixed, and in the groove of guiding oil groove below the pilot seal ring is installed.
As the further optimization of scheme, the volume of described cylinder pressure stabilizer is 0.5-1.5 times of both sides volume of cylinder summation.
As the further optimization of scheme, described cylinder is pressed the inflator on the stabilizer, is to press the stabilizer upper end to be provided with valve seat at cylinder, and unidirectional gas charging valve is installed on the valve seat, and the valve seat upper end is provided with annular groove, filling with sealant in the groove with the junction plane of unidirectional gas charging valve.
As the further optimization of scheme, described cylinder and cylinder press on the stabilizer all that interference is equipped with gas-tpe fitting, and the tracheae on the gas-tpe fitting connects respectively cylinder and presses stabilizer and cylinder.
Further optimization as scheme is equipped with throttle valve plate between the gas-tpe fitting of described cylinder and the tracheae, and the axle center of throttle valve plate is provided with the micrometeor pore.
As the further optimization of scheme, between described guide holder and the cylinder, filling with sealant in the annular groove of guide holder interference end; Between described cylinder seat and the cylinder, filling with sealant in the annular groove of cylinder seat interference end.
As the further optimization of scheme, the lower end of described stretching upper limit valve is equipped with seal washer, and the lower end surface of seal washer and the bottom of valve pocket are bonding, and the annular cutting edge of stretching upper limit valve lower end is pushed down seal washer, forms the soft contact of cutting edge formula.
As the further optimization of scheme, described compression variable flow valve and stretching variable flow valve are made by silicone rubber material.
Further optimization as scheme is filled with precompressed nitrogen in the described cylinder.
The utility model stable voltage frequency conversion vibration damper guarantees that with the equivalent factor of both sides cylinder pressure the symmetrical balance rate of both sides Resistance Value reaches 99%, maneuverability with unprecedented elasticity Semiconductor Converting Technology with piston rises to electrodeless frequency conversion field, and technical performance surmounts present state-of-the-art electronic controlled suspension.Cylinder presses stabilizer not only to regulate and control the symmetrical coefficient of stabilization of both sides cylinder pressure and Resistance Value, also the precompressed timeliness of lifting cylinder with the extra increase-volume of gas.The upper end lip of oil sealing seals dirt with self fastening function, and the lower end lip is with self fastening function oil sealing envelope gas, and pilot seal part and piston seal all arrange 360 degree annulars for oil lubrication, reduce wear rate and the leak-down rate of Sealing with high-efficiency lubricating.In the compression stroke of piston, compression valve makes resistance reduce to increase throughput, make bearing spring that sufficient buffer condition be arranged, in the stretching travel of piston, the stretching valve makes resistance improve to reduce throughput, thereby bounce-back speed and the kinetic energy of bearing spring are decayed rapidly.The lower limit pore flow of compression variable flow valve and stretching variable flow valve all is that the vibration damping take the standard road conditions requires as basis of design, when automobile when bad road conditions are run at high speed and are produced judder, the stroke frequency of piston and the flow rate Synchronous lifting of gas, the lower limit pore that compresses variable flow valve and stretching variable flow valve this moment is enlarged by value-added reciprocal air-flow because of elasticity factor, thereby throughput is got a promotion, created the frequency conversion space to piston.Do not have precompressed gas during this product export in the cylinder, after the Integral automobile assembling, connect unidirectional gas charging valve with the pressure limiting inflator again, and back down the pretightening force of valve, and be charged into precompressed nitrogen, gas presses stabilizer and tracheae to enter cylinder by cylinder.Vibration damper in use can pressurize once by the precompressed standard in cylinder every 1 year or 2 years, to guarantee the continuous stability of precompressed value and Resistance Value.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail:
Fig. 1 is appearance assumption diagram of the present utility model;
Fig. 2 is the structural representation of the utility model vibration damper 1;
Fig. 3 is the structural representation that the utility model cylinder is pressed stabilizer 2;
Fig. 4 is the structural representation of the utility model compression variable flow valve 16 and stretching variable flow valve 35;
Among the figure: vibration damper 1, cylinder is pressed stabilizer 2, dust-proof cover 3, unidirectional gas charging valve 4, permanent magnetic plate 5, tracheae 6, piston rod 7, oil sealing 8, guiding oil groove 9, guide holder 10, throttle valve plate 11, gas-tpe fitting 12, upper cylinder half chamber 13, Cock screw 14, piston 15, compression variable flow valve 16, positioning ring 17, cylinder 18, cylinder seat 19, sealer 20, lower cylinder chamber 21, piston packing ring 22, sunk screw 23, piston oil slot 24, stretching upper limit valve 25, pressure spring 26, circulation pore 27, limited location snap ring 28, spacing cushion rubber 29, pilot seal ring 30, valve seat 31, valve pocket 32, seal washer 33, compression upper limit valve 34, stretching variable flow valve 35.
Embodiment
Such as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, a kind of stable voltage frequency conversion vibration damper of the utility model, it presses stabilizer 2 to be communicated with respectively the vibration damper 1 of the left and right sides by two tracheaes 6 with cylinder, makes the precompressed value of both sides vibration damper 1 and Resistance Value reach symmetrical stable technical purpose.It is the rectangular pressurized container of stainless steel material that cylinder is pressed stabilizer 2, its volume (1 liter) is about 1 times of both sides cylinder 18 volume summations, be installed by welding with the valve seat 31 of stainless steel material on the cylinder pressure stabilizer 2 in the circular hole of Transverse plane, valve seat 31 is fastenedly connected by the unidirectional gas charging valve 4 of screw thread and upper end, the junction plane of valve seat 31 upper ends and unidirectional gas charging valve 4 is provided with annular groove, filling with sealant 20 in the groove seals and prevents thread looseness to maintain secrecy.The upper end pore of unidirectional gas charging valve 4 is equipped with fluorine rubber dust-proof cover 3.Cylinder presses in the circular hole of stabilizer 2 left and right sides end faces respectively that interference is equipped with gas-tpe fitting 12, and cylinder is pressed each bonding powerful permanent plate 5 of two ends, stabilizer 2 bottom, magnetic force location during in order to assembling.Vibration damper 1 is that converter plant forms by cylinder, piston work done device and valve.Piston 15 and piston rod 7 are installed in the cylinder 18, and assemble the pilot hole of piston 15 upper ends and piston rod 7 lower ends, inwardly is screwed into 4 positioning holes of piston rod 7 ends from the horizontal screw at assembling position with 4 Cock screws 14 again.The piston packing ring 22 of fluorine rubber material is installed in piston 15 upper end annular grooves and the lower end annular groove, and the middle section position of piston 15 is provided with the annular piston oil groove 24 that is full of lubricating grease, in order to piston packing ring 22 is done for oil lubrication.The epimere shaft core position of piston 15 is provided with valve pocket 32, axle center, valve pocket 32 bottom pore is compression upper limit valve 34, in order to control the upper limit throughput of compression stroke, piston 15 lower end surface shaft core positions are equipped with the compression variable flow valve 16 of silicone rubber material, the working principle of compression variable flow valve 16 is the vibration dampings that adapt to the standard road conditions with the flow of lower limit pore, when causing throughput to promote in case automobile sails bad road conditions into, the lower limit pore then with elastic index to upper limit reaming unsteady flow, the outer ring, lower end surface of compression variable flow valve 16 is equipped with through the fastening positioning ring 17 of 4 sunk screws 23, and variable flow valve 16 is compressed the location.Valve pocket 32 inside are equipped with the stretching upper limit valve 25 of aluminum alloy material, stretching upper limit valve 25 is with the upper limit throughput of axle center pore restrained stretching stroke, the bonding stretching variable flow valve 35 that silicone rubber material is installed of the epimere body cavity of stretching upper limit valve 25, the working principle of stretching variable flow valve 35 is the vibration dampings that adapt to the standard road conditions with the flow of lower limit pore, when causing throughput to promote in case automobile sails bad road conditions into, the lower limit pore then with elastic index to upper limit reaming unsteady flow.The lower end of stretching upper limit valve 25 is equipped with the seal washer 33 of silicone rubber material, and the bottom of the lower end surface of seal washer 33 and valve pocket 32 is bonding, and stretching upper limit valve 25 is pushed down seal washer 33 with the annular cutting edge of lower end, forms the soft contact of cutting edge formula.The positioning hole of piston rod 7 lower end surfaces is withstood in the upper end of pressure spring 26, and the upper-end surface that stretching upper limit valve 25 is pushed down in the lower end of pressure spring 26 consists of pretightening force.Axle center, piston rod 7 lower end is provided with circulation pore 27, and the upper end of circulation pore 27 is communicated with upper cylinder half chamber 13, and the lower end of circulation pore 27 is communicated with lower cylinder chamber 21 by valve pocket 32.The bottom diameter of cylinder 18 and cylinder seat 19 interference assembling, filling with sealant 20 in the annular groove of cylinder seat 19 interference ends, and the lower end screw thread of cylinder seat 19 can sealed various assembly parts.The lower end interference assembling of the upper-end inner diameter of cylinder 18 and guide holder 10, filling with sealant 20 in the annular groove of guide holder 10 interference ends, the bonding self-tight oil seal 8 that the fluorine rubber material is installed in the upper-end surface axle center hole of guide holder 10, the upper lip of oil sealing 8 internal diameters and lower lip all with piston rod 7 interference fit, and produce radially enclasping force.The below of oil sealing 8 is provided with the annular guiding oil groove 9 that is full of lubricating grease, for the reciprocal guiding of piston rod 7 provides lubricating condition, the pilot seal ring 30 of fluorine rubber material is installed in the guiding oil groove 9 below grooves.Piston rod 7 up passes pilot seal ring 30 from the axle center hole of guide holder 10 lower ends, the up and down lip of guiding oil groove 9 and oil sealing 8, and the upper end screw rod of piston rod 7 and the fastening assembling of vehicle body assembling stand, the lower end of piston rod 7 is equipped with limited location snap ring 28 and spacing cushion rubber 29.Interference is equipped with gas-tpe fitting 12 in the circular hole of cylinder 18 upper end casing walls, the outer end endoporus of gas-tpe fitting 12 is equipped with throttle valve plate 11, the axle center of throttle valve plate 11 is provided with the micrometeor pore, press and the symmetrical coefficient of stabilization of Resistance Value with the micrometeor of gas regulation and control left and right sides cylinder, and to subtracting to hold and do micrometeor gas storage adjusting because piston moves down the upper cylinder half chamber of causing in the compression stroke.The tracheae 6 of two fluorine rubber materials presses the outer end endoporus of stabilizer 2 two ends gas-tpe fittings 12 bonding with an end and cylinder respectively, the other end is bonding with the outer end endoporus of left and right sides cylinder 18 gas-tpe fittings 12 respectively, resisting medium in the cylinder 18 is to connect unidirectional gas charging valve 4 with the pressure limiting inflator, and back down the pretightening force of valve, and the precompressed nitrogen that is charged into.
The working principle of the utility model stable voltage frequency conversion vibration damper is as follows: after this vibration damper 1 and the automobile assembling, the rigging position of piston 15 is in the middle part of cylinder 18, and cylinder 18 is separated into up and down two-layer cylinder chamber, and there is equivalent precompressed gas two-layer cylinder chamber.When vibration is travelled in the automobile generation, can impel bearing spring to produce the reciprocal kicking motion of persistency, bearing spring is done compression and the stretching of persistency to piston rod 7 by assembly connection, impel piston 15 in cylinder 18 interior reciprocal works done.When piston 15 during to lower compression, lower cylinder chamber 21 dwindles supercharging because of volume, reduce pressure because volume increases in upper cylinder half chamber 13, the pretightening force of upper limit valve 25 of stretching this moment is opened by the pressurized gas of lower cylinder chamber 21, the pressurized gas of lower cylinder chamber 21 pass through the lower limit pore of compression variable flow valve 16 to 13 pressure releases of upper cylinder half chamber, utilize the lower limit throttling of compression variable flow valve 16, and produce stable resistance to compression pression.When piston 15 was compressed to stroke terminal, stretching upper limit valve 25 was by the pretightening force of pressure spring 26 sealing, and the air pressure of two-layer cylinder chamber is in state of equilibrium up and down.When piston 15 upwards stretched, upper cylinder half chamber 13 was because volume dwindles supercharging, reduced pressure because volume increases in lower cylinder chamber 21, and the upper limit valve 25 that stretches this moment will compress upper limit valve 34 and thoroughly seal.The pressurized gas of upper cylinder half chamber 13 can only by the downward cylinder of lower limit pore chamber 21 pressure releases of stretching variable flow valve 35, utilize the lower limit throttling of stretching variable flow valve 35, and produce stable enhanced stretch resistance.Because the throughput of stretching valve opening is all the time less than the throughput of compressing valve opening, enhanced stretch resistance all the time greater than resistance to compression pression 3-4 doubly.
The lower limit pore flow of compression variable flow valve 16 and stretching variable flow valve 35 all is that the vibration damping take the standard road conditions requires as basis of design, when automobile when bad road conditions are run at high speed and are produced judder, the stroke of piston 15, the flow rate Synchronous lifting of frequency and gas, this moment, value-added reciprocal air-flow can impel the pore of compression variable flow valve 16 and stretching variable flow valve 35 to enlarge, throughput is increased progressively to the upper limit, promote 2-4 frequency speed doubly for piston 15, effectively control the formation condition of rigidity and kinetic energy, automobile is run at high speed in bad road conditions do not vibrate sense, do not need the anti-vibration of slowing down.
Claims (9)
1. stable voltage frequency conversion vibration damper is characterized in that: it is pressurized container that cylinder is pressed stabilizer, and cylinder is pressed on the stabilizer inflator is housed, and cylinder presses the stabilizer both sides to be communicated with a vibration damper by tracheae respectively;
Described vibration damper is that converter plant consists of by cylinder, piston work done device and valve, the guide holder interference is assemblied in cylinder head, the interference of cylinder seat is assemblied in cylinder bottom, assembling all-in-one-piece piston and piston rod are installed in the cylinder, piston rod is movably installed in the axle center hole of guide holder, the upper end screw rod of piston rod and the fastening assembling of vehicle body assembling stand, the assembling screw thread is established in cylinder seat lower end;
The epimere shaft core position of described piston is provided with valve pocket, axle center, valve pocket bottom pore is compression upper limit valve, the piston lower surface shaft core position is equipped with the compression variable flow valve, and valve pocket inside is equipped with stretching upper limit valve, the bonding stretching variable flow valve that is equipped with of the epimere body cavity of stretching upper limit valve; The positioning hole of piston-rod lower end face is withstood in the upper end of the pressure spring in the valve pocket, and the upper-end surface of stretching upper limit valve is pushed down in the lower end of pressure spring; In the annular groove of piston upper and lower end outer ring piston packing ring is installed, the stage casing groove of piston is the annular piston oil groove, is marked with lubricating grease in the annular piston oil groove, and the lower end of piston rod is equipped with limited location snap ring and spacing cushion rubber;
Described piston-rod lower end axle center is provided with the circulation pore, and the upper end of circulation pore is communicated with the upper cylinder half chamber of cylinder, and the lower end of circulation pore is communicated with lower cylinder chamber by valve pocket;
Described guide holder internal diameter is provided with annular guiding oil groove, be marked with lubricating grease in the guiding oil groove, guiding oil groove top is provided with self-tight oil seal, piston rod interference fit about the internal diameter of oil sealing in lip and the guide holder internal diameter, the upper-end surface axle center hole of the outer ring of oil sealing and guide holder is fixed, and in the groove of guiding oil groove below the pilot seal ring is installed.
2. stable voltage frequency conversion vibration damper as claimed in claim 1 is characterized in that: described cylinder press the volume of stabilizer be both sides volume of cylinder summation 0.5-1.5 doubly.
3. stable voltage frequency conversion vibration damper as claimed in claim 1, it is characterized in that: described cylinder is pressed the inflator on the stabilizer, to press the stabilizer upper end to be provided with valve seat at cylinder, unidirectional gas charging valve is installed on the valve seat, the valve seat upper end is provided with annular groove, filling with sealant in the groove with the junction plane of unidirectional gas charging valve.
4. stable voltage frequency conversion vibration damper as claimed in claim 1 is characterized in that: described cylinder and cylinder press on the stabilizer all that interference is equipped with gas-tpe fitting, and the tracheae on the gas-tpe fitting connects respectively cylinder and presses stabilizer and cylinder.
5. stable voltage frequency conversion vibration damper as claimed in claim 4, it is characterized in that: between the gas-tpe fitting of described cylinder and the tracheae throttle valve plate is installed, the axle center of throttle valve plate is provided with the micrometeor pore.
6. stable voltage frequency conversion vibration damper as claimed in claim 1 is characterized in that: between described guide holder and the cylinder, and filling with sealant in the annular groove of guide holder interference end; Between described cylinder seat and the cylinder, filling with sealant in the annular groove of cylinder seat interference end.
7. stable voltage frequency conversion vibration damper as claimed in claim 1, it is characterized in that: the lower end of described stretching upper limit valve is equipped with seal washer, the lower end surface of seal washer and the bottom of valve pocket are bonding, and the annular cutting edge of stretching upper limit valve lower end is pushed down seal washer, form the soft contact of cutting edge formula.
8. stable voltage frequency conversion vibration damper as claimed in claim 1, it is characterized in that: described compression variable flow valve and stretching variable flow valve are made by silicone rubber material.
9. stable voltage frequency conversion vibration damper as claimed in claim 1 is characterized in that: be filled with precompressed nitrogen in the described cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415286 CN202732820U (en) | 2012-08-21 | 2012-08-21 | Pressure-stabilizing variable-frequency damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415286 CN202732820U (en) | 2012-08-21 | 2012-08-21 | Pressure-stabilizing variable-frequency damper |
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| Publication Number | Publication Date |
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| CN202732820U true CN202732820U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220415286 Expired - Fee Related CN202732820U (en) | 2012-08-21 | 2012-08-21 | Pressure-stabilizing variable-frequency damper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777531A (en) * | 2012-08-21 | 2012-11-14 | 宣昌黎 | Pressure-stabilizing variable frequency damper |
| CN111513458A (en) * | 2020-05-06 | 2020-08-11 | 杭州国鼎明睿实业有限公司 | Learning desk |
-
2012
- 2012-08-21 CN CN 201220415286 patent/CN202732820U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777531A (en) * | 2012-08-21 | 2012-11-14 | 宣昌黎 | Pressure-stabilizing variable frequency damper |
| CN102777531B (en) * | 2012-08-21 | 2014-04-30 | 宣昌黎 | Pressure-stabilizing variable frequency damper |
| CN111513458A (en) * | 2020-05-06 | 2020-08-11 | 杭州国鼎明睿实业有限公司 | Learning desk |
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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: 20130213 Termination date: 20140821 |
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| EXPY | Termination of patent right or utility model |