CN103352898B - A kind of Cushion of High-speed Pneumatic Cylinders device - Google Patents
A kind of Cushion of High-speed Pneumatic Cylinders device Download PDFInfo
- Publication number
- CN103352898B CN103352898B CN201310306675.4A CN201310306675A CN103352898B CN 103352898 B CN103352898 B CN 103352898B CN 201310306675 A CN201310306675 A CN 201310306675A CN 103352898 B CN103352898 B CN 103352898B
- Authority
- CN
- China
- Prior art keywords
- spool
- resorption
- cavity
- earial drainage
- buffering
- 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
Landscapes
- Actuator (AREA)
Abstract
A kind of Cushion of High-speed Pneumatic Cylinders device, comprises buffer plunger and end cap, end cap is also provided with trimmer valve mechanism; Trimmer valve mechanism comprises upper cover, buffering spool, upper spring, lower spring, spool epicoele, spool cavity of resorption, current by pass and pressure feedback hole; Buffering spool is loaded in spool cavity of resorption, current by pass comprises earial drainage upstream orifice, earial drainage downstream aperture, two ends, pressure feedback hole are communicated with spool cavity of resorption with cylinder buffering chamber respectively, earial drainage upstream orifice two ends are communicated with spool cavity of resorption with pressure feedback hole respectively, earial drainage downstream aperture two ends are communicated with spool cavity of resorption with plunger cavity respectively, upper spring and lower spring are contained in buffering spool upper and lower, the 1/2-2/3 of earial drainage downstream aperture shelters from by buffering spool lower end dome platform, forms the initial discharge orifice of earial drainage downstream aperture.The invention has the beneficial effects as follows: for Cushion of High-speed Pneumatic Cylinders, there is very good effect, self-regulating buffering can be realized when load, speed and pressure change within the specific limits.
Description
Technical field
The invention belongs to pneumatics field, particularly relate to high-speed cylinder field, particularly high-speed cylinder self-regulating buffer technology.
Background technique
When high-speed cylinder runs, due to the shock of piston and cylinder cap, thus easily produce and impact and vibrations, thus damage parts.For solving this technical problem, taking in prior art, cylinder buffering device is set and solves.The cylinder buffering device of prior art has:
The utility model patent of granary AudioCodes machinery Co., Ltd: cylinder buffering device.This technology is discharged through buffer throttling valve by buffering intracavity gas, because in buffer cavity, gas pressure constantly raises, piston is slowed down, to slow down the shock of piston to cylinder cap, until piston stopping, avoiding impact and vibrations that piston and cylinder cap produce because of shock.
The utility model patent of Tianjin Uranus Hydraulic Machinery Co., Ltd.: ultrahigh-speed air cylinder, this technology respectively devises the adjustable wheel design of one group of expanding force on piston and cylinder head, have employed rolls replaces original slide type, piston rod adopts hollow structure, adds the flexibility of movable component; Piston is provided with radiating groove.
The utility model patent of Cui Huimei: cylinder assembly.This technical profession stopper rod stretches out from the lower end capping of urceolus, and the air inlet/outlet of needle-valve is communicated with ring cavity with inner core respectively, and urceolus top is also arranged can by the depression bar of movable valve plug, and the top of needle-valve arranges upper cover.
The damping device centering high-speed cylinder of prior art all can not realize regulating buffering voluntarily preferably.
Summary of the invention
The object of this invention is to provide a kind of Cushion of High-speed Pneumatic Cylinders device, by changing parameter, can make cylinder under middle and high fast different loads, supply gas pressure, realize better buffering.
Technological scheme of the present invention is: a kind of Cushion of High-speed Pneumatic Cylinders device, comprises buffer plunger and end cap.End cap is bolted to connection at cylinder head portions, and buffer plunger left-hand end is connected with cylinder piston rod front end, and buffer plunger is placed in buffer plunger chamber; Buffer plunger chamber right part has import/exhaust hole, and end cap left end has the seal ring mounting hole coaxial with plunger cavity, and one-way sealing seal is housed.It is characterized in that described end cap is also provided with trimmer valve mechanism; Described trimmer valve mechanism comprises upper cover, buffering spool, upper spring, lower spring, spool epicoele, current by pass, pressure feedback hole and spool cavity of resorption; Described upper cover is the threaded cap of lower end with minor axis; Described buffering spool is the cylindrical body having two dome platforms, and two dome platforms are respectively at cylindrical lower end and middle part, and lower end dome platform is thick dome platform, and middle part dome platform is thin dome platform, forms spool lumen between two dome platforms; In described spool upper cavity end cap top and buffer plunger Vertical direction, spool epicoele is a cylindrical cavity, and spool epicoele, on end cap upper-end surface, is closed by upper cover by spool epicoele opening; Described spool cavity of resorption is a cylindrical cavity be communicated with spool epicoele, and buffering spool is loaded in spool cavity of resorption, is Spielpassung between spool cavity of resorption and buffering spool two dome platform; Described current by pass comprises earial drainage upstream orifice and earial drainage downstream aperture, earial drainage upstream orifice and earial drainage downstream aperture be the left and right sides, position between the buffering spool two dome platform of spool cavity of resorption respectively, the discharge orifice be positioned on the left of spool cavity of resorption is earial drainage upstream orifice, and the discharge orifice be positioned on the right side of spool cavity of resorption is earial drainage downstream aperture; Pressure feedback hole is had above buffer plunger chamber, pressure feedback hole left end opening, right-hand member is communicated with spool cavity of resorption end, pressure feedback hole left end opening is communicated with cylinder buffering chamber, earial drainage upstream orifice one end is communicated with pressure feedback hole, the other end is communicated with spool cavity of resorption, earial drainage downstream aperture one end communicates with buffer plunger chamber, the other end is communicated with spool cavity of resorption, a regulating tank is provided with above the earial drainage upstream orifice of spool cavity of resorption, regulating tank upper end and spool epicoele bottom surface distance equal to cushion dome platform thickness in the middle part of spool, form a valve body step; Described upper spring is sleeved on upper cover lower end minor axis and buffering spool upper end, described lower spring to be placed in bottom spool cavity of resorption and bottom buffering spool between, upper spring and lower spring make the upper edge of buffering spool lower end dome platform be placed in the 1/2-2/3 place of earial drainage downstream aperture, the 1/2-2/3 of earial drainage downstream aperture is sheltered from, forms the initial discharge orifice of earial drainage downstream aperture.
A kind of Cushion of High-speed Pneumatic Cylinders device of the present invention, is characterized in that: described regulating tank is rectangle groove.
Principle of the present invention is: when cushioning spool and being in reference position, spool epicoele and cavity of resorption separate by spool, and spool epicoele is an airtight space.Now buffering spool and downstream discharge orifice form an initial discharge orifice.After entering cushion stroke, in buffer cavity, gas pressure raises.Because spool cavity of resorption is communicated with buffer cavity by feedback pressure hole, the pressure that spool cavity of resorption is subject to raises; Spool epicoele is closed and is entered without gas, and pressure is constant.The bonding force direction of buffering suffered by spool upwards, promote spool moves on to buffer position, in the middle part of buffering spool, dome platform exceeds valve body step, regulating tank communicates with spool epicoele, make upper and lower two cavity pressures of buffering spool equal, exhaust port blocks by buffering spool completely, does not have gas to flow out, buffer cavity pressure continues to raise, and the movement velocity of piston is reduced.If buffering valve core movement once rear buffer cavity pressure still rises, then cushion spool and again move upward (principle is the same), until buffer cavity pressure no longer continues to rise, namely velocity of piston is reduced to close to zero.Pressurized gas in buffer cavity absorb the kinetic energy of piston, are converted into the compression energy of gas.
Buffering spool reduces through buffer cavity pressure once or after repeatedly moving upward, and supposes that initial discharge orifice air leakage amount converts piston movement speed V to
let out(i.e. equivalent piston movement speed), so, now velocity of piston is less than V
let out, namely the compression speed of buffer cavity gas is less than initial discharge orifice and loses heart speed, and in buffer cavity, gas pressure does not rise counter falling.Now spool upper cavity pressure is constant, lower cavity pressure reduces, buffering spool continues to move downward from reference position under force action, the screening area of buffering spool to initial discharge orifice constantly reduces, earial drainage speed increases, this has promoted again the reduction of gas pressure in buffer cavity conversely, until buffering spool reaches exhaust work position.Spool does not block initial discharge orifice completely, and air leakage amount reaches maximum, accelerates the discharge of buffer cavity inner high voltage gas.
Through process above, piston can reach stroke end with minimum speed v, achieves good buffering.
The invention has the beneficial effects as follows:
This buffer structure has good effect for high-speed cylinder, the useful area of initial discharge orifice when cushioning spool initial bit by reasonably adjusting, and cylinder can be made to realize good self-regulating buffering to the speed in accommodation, load variations.
Accompanying drawing explanation
Accompanying drawing 1 is Cushion of High-speed Pneumatic Cylinders device perspective cross-sectional schematic diagram
Accompanying drawing 2 is Cushion of High-speed Pneumatic Cylinders device explosion schematic diagram
Accompanying drawing 3 is end cap schematic perspective views
Accompanying drawing 4 is upper cover schematic perspective views
Accompanying drawing 5 is one-way sealing seal schematic perspective views
Accompanying drawing 6 is buffer plunger schematic perspective views
Accompanying drawing 7 is buffering spool schematic perspective views
Accompanying drawing 8 is Cushion of High-speed Pneumatic Cylinders device plan views
Accompanying drawing 9 is Cushion of High-speed Pneumatic Cylinders device left views
Accompanying drawing 10 is Cushion of High-speed Pneumatic Cylinders device plan views
Accompanying drawing 11 is buffering spool reference position schematic diagram
Accompanying drawing 12 is buffering spool buffer position schematic diagram
Accompanying drawing 13 is buffering spool exhaust position schematic diagram
In figure, 1, piston rod, 2, one-way sealing seal, 3, auxiliary hole, 4, buffering spool, 5, upper cover, 6, upper spring, 7, spool epicoele, 8, lower spring, 9, auxiliary hole, 10, auxiliary hole, 11, buffer plunger, 12, import/exhaust hole, 13, end cap, 14, earial drainage upstream orifice, 15, pressure feedback hole, 16, spool cavity of resorption, 17, spool lumen, 18, earial drainage downstream aperture, 19, tapped hole, 20, upper cover installs tapped hole, 21, seal ring mounting hole, 22, initial discharge orifice, 23, regulating tank, 24, valve body step, 25, buffer plunger chamber.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
Accompanying drawing 1-13 is the schematic diagram of embodiment.Cushion of High-speed Pneumatic Cylinders device comprises buffer plunger 11 and end cap 13, and end cap 13 is bolted to connection in cylinder front end, and piston rod 1 front end processes the screw thread of a M10x1.25.Buffer plunger 11 material is plastics, and buffer length is 80mm(cylinder total kilometres is 800mm, and cylinder diameter is 40mm), the thread groove that left-hand end processes a M10x1.25 is fixedly connected with piston rod 1 nose threads.Be provided with seal ring mounting hole 21 on the left of end cap 13, seal ring mounting hole 21 is coaxial with plunger cavity, and apart from end cap 13 left end 1mm place on the left of hole, aperture is Ф 26, hole depth 4mm, and one-way sealing seal 2 is arranged in seal ring mounting hole 21.One-way sealing seal 2 material is polyurethane, and seal ring, when entering buffer status, plays sealing process; When piston rod commutation is stretched out, source gas can enter chamber very soon.Buffer plunger 11 right-hand member enters buffer plunger chamber left end rear cylinder and just enters cushion stroke.End cap 13 is also provided with trimmer valve mechanism; Trimmer valve mechanism comprises upper cover 5, buffering spool 4, upper spring 6, lower spring 8, spool epicoele 7, current by pass, pressure feedback hole 15 and spool cavity of resorption 16; Upper cover 5 is lower end threaded caps with minor axis, and upper cover material is plastics, the screw thread of processing Ф 3/8x9, and it be 6mm diameter is 4mm that a short cylindrical length is stretched out in front end, and size can not be too large and hinder the normal motion upwards of buffering spool; Size can not be too little, owing to not having leading role may be ejected by buffering spool and normally can not return to original state by bleed pressure when commutating time too little.Spool epicoele 7 is formed between upper cover 5 and buffering spool 4, buffering spool 4 is the cylindrical bodys having two dome platforms, and two dome platforms are respectively at cylindrical lower end and middle part, and lower end dome platform is thick dome platform, middle part dome platform is thin dome platform, form spool lumen 25 between two dome platforms, trimmer valve core material is aluminium, cross-sectional plane picture " soil " word, spool epicoele 7 is on end cap top and buffer plunger Vertical direction, and spool epicoele 7 is cylindrical cavity, aperture Ф 15, and spool epicoele 7, on the upper-end surface of end cap, is closed by upper cover 5 by spool epicoele 7 opening, spool cavity of resorption 16 is aperture Ф 8 of a cylindrical cavity be communicated with spool epicoele 7, spool cavity of resorption 16, and buffering spool 4 is loaded in spool cavity of resorption 16, is Spielpassung between spool cavity of resorption 16 and buffering spool 4 liang of dome platforms, current by pass comprises earial drainage upstream orifice 14 and earial drainage downstream aperture 18, earial drainage upstream orifice 14 and earial drainage downstream aperture 18 be the left and right sides, position between buffering spool 4 liang of dome platforms of spool cavity of resorption 16 respectively, the discharge orifice be positioned on the left of spool cavity of resorption 16 is earial drainage upstream orifice 14, the discharge orifice be positioned on the right side of spool cavity of resorption 16 is earial drainage downstream aperture 18, the aperture Ф 3 of earial drainage upstream orifice 14 and earial drainage downstream aperture 18, pressure feedback hole 15 is had above buffer plunger chamber, pressure feedback hole 15 left end opening, right-hand member is communicated with spool cavity of resorption 16 lower end, pressure feedback hole 15 left end opening is communicated with cylinder buffering chamber, earial drainage upstream orifice 14 one end is communicated with feedback pressure hole 15, the other end is communicated with spool cavity of resorption 16, pressure feedback hole 15 aperture Ф 5, earial drainage downstream aperture 18 one end communicates with buffer plunger chamber, the other end is communicated with spool cavity of resorption 16, a regulating tank 23 is provided with above the earial drainage upstream orifice 14 of spool cavity of resorption 16, regulating tank 23 is rectangle grooves of a 1x4.5x5, object is that earial drainage upstream orifice 14 can be communicated with spool lumen 25 in good time, regulating tank 23 upper end and spool epicoele 7 bottom surface distance equal to cushion dome platform thickness in the middle part of spool 4, form a valve body step 24, the elasticity coefficient of upper spring 6 and lower spring 8 is less, two spring diameters are 6mm, upper spring 6 is sleeved on upper cover 5 lower end minor axis and buffering spool 4 upper end, lower spring 8 to be placed in bottom spool cavity of resorption 16 and bottom buffering spool 4 between, upper spring 6 and lower spring 8 make the upper edge of buffering spool 4 lower end dome platform be placed in the 1/2-2/3 place of earial drainage downstream aperture, the 1/2-2/3 of earial drainage downstream aperture is sheltered from, forms the initial discharge orifice 22 of earial drainage downstream aperture.Auxiliary hole 3, auxiliary hole 9 and auxiliary hole 10 are the manufacturability holes offered for processing earial drainage upstream orifice 14 and earial drainage downstream aperture 18, and after earial drainage upstream orifice 14 and earial drainage downstream aperture 18 machine, auxiliary hole 3, auxiliary hole 9 and auxiliary hole 10 will be closed.
Claims (2)
1. a Cushion of High-speed Pneumatic Cylinders device, comprise buffer plunger (11) and end cap (13), end cap (13) is bolted to connection at cylinder head portions, and buffer plunger (11) left-hand end is connected with cylinder piston rod (1) front end, and buffer plunger (11) is placed in buffer plunger chamber (25), buffer plunger chamber (25) right part has import/exhaust hole (12), end cap (13) left-hand end has the seal ring mounting hole (21) coaxial with buffer plunger chamber (25), one-way sealing seal (2) is housed, it is characterized in that described end cap (13) is also provided with trimmer valve mechanism, described trimmer valve mechanism comprises upper cover (5), buffering spool (4), upper spring (6), lower spring (8), spool epicoele (7), current by pass, pressure feedback hole (15) and spool cavity of resorption (16), described upper cover (5) is the threaded cap of lower end with minor axis, described buffering spool (4) is the cylindrical body having two dome platforms, and two dome platforms are respectively at cylindrical lower end and middle part, and lower end dome platform is thick dome platform, and middle part dome platform is thin dome platform, forms spool lumen (17) between two dome platforms, described spool epicoele (7) is on end cap (13) top and buffer plunger (11) Vertical direction, spool epicoele (7) is a cylindrical cavity, spool epicoele (7), on end cap (13) upper-end surface, is closed by upper cover (5) by spool epicoele (7) opening, described spool cavity of resorption (16) is a cylindrical cavity be communicated with spool epicoele (7), and buffering spool (4) is loaded in spool cavity of resorption (16), is Spielpassung between spool cavity of resorption (16) and buffering spool (4) two dome platform, described current by pass comprises earial drainage upstream orifice (14) and earial drainage downstream aperture (18), earial drainage upstream orifice (14) and earial drainage downstream aperture (18) be the left and right sides, position between buffering spool (4) the two dome platform of spool cavity of resorption (16) respectively, the discharge orifice being positioned at spool cavity of resorption (16) left side is earial drainage upstream orifice (14), and the discharge orifice being positioned at spool cavity of resorption (16) right side is earial drainage downstream aperture (18), pressure feedback hole (15) is had above buffer plunger chamber, pressure feedback hole (15) left end opening, right-hand member is communicated with spool cavity of resorption (16) lower end, pressure feedback hole (15) left end opening is communicated with cylinder buffering chamber, earial drainage upstream orifice (14) one end is communicated with pressure feedback hole (15), the other end is communicated with spool cavity of resorption (16), earial drainage downstream aperture (18) one end communicates with buffer plunger chamber, the other end is communicated with spool cavity of resorption (16), earial drainage upstream orifice (14) top of spool cavity of resorption (16) is provided with a regulating tank (23), regulating tank (23) upper end and spool epicoele (7) bottom surface distance equal to cushion spool (4) middle part dome platform thickness, form a valve body step (24), described upper spring (6) is sleeved on upper cover (5) lower end minor axis and buffering spool (4) upper end, described lower spring (8) is placed between spool cavity of resorption (16) bottom and buffering spool (4) bottom, upper spring (6) and lower spring (8) make the upper edge of buffering spool (4) lower end dome platform be placed in the 1/2-2/3 place of earial drainage downstream aperture (18), the 1/2-2/3 of earial drainage downstream aperture (18) is sheltered from, forms the initial discharge orifice (22) of earial drainage downstream aperture.
2., by a kind of Cushion of High-speed Pneumatic Cylinders device described in claim 1, it is characterized in that: described regulating tank (23) is rectangle groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310306675.4A CN103352898B (en) | 2013-07-18 | 2013-07-18 | A kind of Cushion of High-speed Pneumatic Cylinders device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310306675.4A CN103352898B (en) | 2013-07-18 | 2013-07-18 | A kind of Cushion of High-speed Pneumatic Cylinders device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103352898A CN103352898A (en) | 2013-10-16 |
| CN103352898B true CN103352898B (en) | 2015-08-12 |
Family
ID=49309300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310306675.4A Expired - Fee Related CN103352898B (en) | 2013-07-18 | 2013-07-18 | A kind of Cushion of High-speed Pneumatic Cylinders device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103352898B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4228846A1 (en) * | 1992-08-29 | 1993-02-04 | Artur Dipl Ing Gruellmeier | Pneumatic pressure-transmitting actuator with fast- and power-stroke - has low- and high-pressure component of equal dia. |
| CN1276191C (en) * | 2003-03-26 | 2006-09-20 | 哈尔滨工业大学 | Air supply pressure oscillation self-adapting buffered high-speed cylinder |
| CN202659628U (en) * | 2012-05-24 | 2013-01-09 | 重庆迪马工业有限责任公司 | Buffer device for hydraulic cylinder of plunger |
| CN202768534U (en) * | 2012-08-16 | 2013-03-06 | 中船重工中南装备有限责任公司 | Hydraulic cylinder of novel buffer device |
| CN203516289U (en) * | 2013-07-18 | 2014-04-02 | 大连海事大学 | High-speed air cylinder buffer device |
-
2013
- 2013-07-18 CN CN201310306675.4A patent/CN103352898B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4228846A1 (en) * | 1992-08-29 | 1993-02-04 | Artur Dipl Ing Gruellmeier | Pneumatic pressure-transmitting actuator with fast- and power-stroke - has low- and high-pressure component of equal dia. |
| CN1276191C (en) * | 2003-03-26 | 2006-09-20 | 哈尔滨工业大学 | Air supply pressure oscillation self-adapting buffered high-speed cylinder |
| CN202659628U (en) * | 2012-05-24 | 2013-01-09 | 重庆迪马工业有限责任公司 | Buffer device for hydraulic cylinder of plunger |
| CN202768534U (en) * | 2012-08-16 | 2013-03-06 | 中船重工中南装备有限责任公司 | Hydraulic cylinder of novel buffer device |
| CN203516289U (en) * | 2013-07-18 | 2014-04-02 | 大连海事大学 | High-speed air cylinder buffer device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103352898A (en) | 2013-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102338186B (en) | Conical damping hole type buffer for undercarriage of passenger plane | |
| CN105020203A (en) | High-speed cylinder in which pneumatic buffering devices are arranged | |
| CN102588385A (en) | Throttling and buffering integrated structure of cylinder | |
| CN106352010A (en) | Damping force automatic regulation type oil pressure buffer | |
| CN105351426A (en) | Vibration reducer and switching device | |
| CN102927189A (en) | Impulse slow-releasing device | |
| CN202901148U (en) | Impulse controlled-release device | |
| CN203756846U (en) | Plunger-type hydraulic buffer | |
| CN106286471B (en) | It is oriented to buffer unit, hydraulic cylinder and excavator | |
| CN102913506A (en) | Piston rod type hydraulic cylinder with internally-arranged ball hinge | |
| CN105351427A (en) | Buffer device and mechanical switch | |
| ITMI990640A1 (en) | SHOCK ABSORBER DEVICE FOR PNEUMATIC CYLINDERS | |
| CN203516289U (en) | High-speed air cylinder buffer device | |
| CN103352898B (en) | A kind of Cushion of High-speed Pneumatic Cylinders device | |
| CN105402306A (en) | Damping shock absorber and switch device | |
| CN206694486U (en) | Buffer | |
| CN105485239A (en) | Vibration damping device and disconnector | |
| CN105351274A (en) | Energy consumer and mechanical switch | |
| CN102529631B (en) | Buffering protection type oil gas suspension system and vehicle | |
| CN208885852U (en) | A kind of single valve piece inner wall throttle type Bidirectional damping mechanism and hydraulic shock-absorption piston | |
| CN104595278A (en) | Hydraulic buffering oil cylinder | |
| CN207814079U (en) | A kind of fork truck lifting oil cylinder | |
| CN105465263A (en) | Vibration remover and circuit breaker | |
| CN105465264A (en) | Vibration damping device and switch equipment | |
| CN204592827U (en) | A kind of grease pressure regulator valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 Termination date: 20160718 |