CN203595605U - Device for comparing friction performances of two pairs of bearings - Google Patents
Device for comparing friction performances of two pairs of bearings Download PDFInfo
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- CN203595605U CN203595605U CN201320541821.7U CN201320541821U CN203595605U CN 203595605 U CN203595605 U CN 203595605U CN 201320541821 U CN201320541821 U CN 201320541821U CN 203595605 U CN203595605 U CN 203595605U
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- mount pad
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Abstract
The utility model discloses a device for comparing the friction performances of two pairs of bearings, and the device comprises: two transmission shafts which are arranged in parallel at intervals; a friction wheel which fixedly sleeves an output shaft of a motor; and two first flywheels which respectively sleeve the two transmission shaft and can be driven by the rotating friction wheel through the friction effect to rotate at the same time. Each transmission shaft is fixedly sleeved by the inner rings of a pair of bearings. When the device operates, the friction wheel drives the two first flywheels to rotate at the same speed at the same time. The inner rings of two pairs of tested bearings rotate along with the respective transmission shaft. At the moment, the outer rings of the two pairs of bearings are pressed tightly on an installation seat by a pressure plate, and cannot move, and then a motor seat enables the friction wheel to break away from the two rotating first flywheels. The rotation time of two pair of bearings is observed, and the pair of bearings with a long rotation time are excellent in performance.
Description
Technical field
The utility model relates to the device of the frictional behaviour that contrasts bearing, is specifically related to the device of the frictional behaviour for contrasting two pairs of bearings.
Background technology
Frictional behaviour is one of most important performance parameter of bearing, is the principal element that affects bearing operation stationarity and running life.In prior art, there is the device of some test bearing frictional behaviours, as Chinese patent open source literature " a kind of friction torque test device of paired rolling bearing ", publication number CN102901594A, in the document, mention, owing to being all generally paired use in bearing use procedure, so the measurement of matched bearings moment of friction is more meaningful for the design and use of bearing.Friction torque test device in the document, by the torque signals converting to force signal of the tested inside and outside circle of pair of bearings, this force signal is measured by stress strain gauge, force signal is converted into electric signal, transform, process with the electric signal of strain acquirement analytic system counter stress strain transducer, realize the test of moment of friction.Existing device can only be measured the moment of friction of pair of bearings, can not directly contrast the frictional behaviour of two pairs of bearings.
Summary of the invention
The problem that the utility model solves is the frictional behaviour that can directly contrast two pairs of bearings.
For addressing the above problem, the utility model provides the device of the frictional behaviour for contrasting two pairs of bearings.The frictional behaviour of two pairs of bearings of contrast, a kind of method of employing is that two pairs of bearings are accelerated to identical rotational speed, then remove external force, if the rotational time of pair of bearings is longer than second pair of bearing, show that pair of bearings is less than the friction of second pair of bearing, frictional behaviour is superior.According to the method principle design the utility model, its technical scheme is as follows:
A kind of for contrasting the device of frictional behaviour of two pairs of bearings, comprise installing plate, transmission shaft, described transmission shaft has two, two described transmission shafts parallel interval and arrange, on every described transmission shaft, equal fixed cover is provided with the inner ring of pair of bearings, described device also comprises and can be arranged on up or down on described installing plate and can be positioned at the motor cabinet on this installing plate after moving or moving down upper, be contained in the motor on described motor cabinet, the friction pulley of fixed cover on the output shaft of described motor, respectively fixed cover on two described transmission shafts and the described friction pulley that can be rotated drive two the first flywheels of rotation by rubbing action simultaneously, can be fixedly installed on the mount pad on described installing plate, can be arranged on up or down on described mount pad and can be positioned on this mount pad and the outer ring of described bearing can be pressed on to the pressing plate on described mount pad after moving or moving down upper.
Preferably, on every described transmission shaft, all there is the end difference of different diameter of axle sizes, on described every transmission shaft, the end difference of each size all in pairs arrange, and the inner ring of pair of bearings respectively fixed cover be located on the paired described end difference of corresponding size.
When concrete enforcement, described mount pad has two groups, described in two groups, mount pad arranges along the longitudinal direction interval of described transmission shaft, and described in every group, mount pad includes and can be arranged on movably on described installing plate and can after movement, be positioned at base on this installing plate, be arranged on above described base and arrange and all can coordinate with described pressing plate two back-up blocks of the outer ring that clamps a bearing along the horizontal direction interval of described transmission shaft along the longitudinal direction of described transmission shaft.
Preferably, described back-up block adopts V-block.
A kind of concrete embodiment, described device also comprises the multiple elbow folders that are arranged on described installing plate, and each elbow folder all has and can move and can after movement, locate and described base can be pressed on to the press block on described installing plate along the longitudinal direction of described transmission shaft.
Preferably, on two described transmission shafts, fixed cover is provided with the second flywheel respectively.
Preferably, described device also comprise a pair of speed pickup of the rotational speed that can measure respectively two described transmission shafts, all with the be electrically connected control enclosure of the rotational speed value that can show two described transmission shafts of described a pair of speed pickup.
Further preferably, described control enclosure be also with described motor the be electrically connected output speed that can control this motor and the controller that can record or show the rotational speed of every described transmission shaft and the variation relation of time.
A kind of concrete embodiment, on described installing plate, be fixed with the guide rod that many intervals arrange and all extend along the vertical direction, described motor cabinet can be set on the guide rod on described installing plate up or down, between at least two described guide rods, be fixed with web joint, on described motor cabinet, be connected with the screw rod that extends and can rotate along the vertical direction, this screw flight is engaged in the threaded hole of described web joint, and this screw rod passes on the end of described threaded hole and is provided with operation handwheel.
A kind of similarly concrete embodiment, on described mount pad, be fixed with the guide rod that many intervals arrange and all extend along the vertical direction, described pressing plate can be set on the guide rod on described mount pad up or down, between at least two described guide rods, be fixed with web joint, on described pressing plate, be connected with the screw rod that extends and can rotate along the vertical direction, this screw flight is engaged in the threaded hole of described web joint, and this screw rod passes on the end of described threaded hole and is provided with operation handwheel.
Compared with prior art, the utlity model has following advantage: in this device, motor cabinet can move up and down with motor and friction pulley, first, motor cabinet disengages two the first flywheels with friction pulley, motor drives friction wheel from rotation, then motor cabinet is with two first flywheels of friction pulley contact of rotation, friction pulley drives the synchronized rotation of two the first flywheels simultaneously, thereby the inner ring of two pairs of tested bearings is along with transmission shaft separately rotates together, now the outer ring of two pairs of bearings is pressed on mount pad by pressing plate, maintenance maintains static, then motor cabinet departs from the first flywheel of two rotations again with friction pulley, the rotational time of two pairs of bearings of observation, the pair of bearings that rotational time is long, represent that its frictional behaviour is superior, adopt this device, can directly contrast the frictional behaviour of two pairs of bearings.
Accompanying drawing explanation
Fig. 1 is the stereographic map of device of the present utility model;
Fig. 2 is that the master of device of the present utility model looks partial sectional view;
Fig. 3 is the side view of device of the present utility model.
Embodiment
Shown in Figure 1, a kind of for contrasting the device of frictional behaviour of two pairs of bearings, comprise installing plate 1, transmission shaft 2, motor cabinet 3, motor 4, friction pulley 5, two the first flywheels 6, mount pad 7, pressing plate 9, multiple elbow folders 8, a pair of speed pickup (not shown), control enclosure (not shown), on installing plate 1, there is the motor cabinet 3 that can move up and down, and motor cabinet 3 can be positioned on installing plate 1 after moving or moving down upper, in Fig. 1, installing plate 1 has been bolted two guide rods 10 above, these two guide rods 10 parallel interval and arrange, and every guide rod 10 all extends along the vertical direction, as shown in Figure 3, motor cabinet 3 can be set on the guide rod 10 on installing plate 1 up or down, guide moving up and down of motor cabinet 3 by guide rod 10, motor cabinet 3 can be positioned at any time on guide rod 10 after movement, a kind of specific implementation structure adopting is as follows, between two guide rods 10, be fixed with web joint 11, on motor cabinet 3, be connected with the screw rod 12 that extends and can rotate along the vertical direction, these screw rod 12 threaded engagement are in the threaded hole of web joint 11, this screw rod 12 passes and on the end of threaded hole, is provided with operation handwheel 13, rotation operation handwheel 13, turn screw rod 12, screw rod 12 rises or declines with respect to the threaded hole of web joint 11, thereby moving up and down of drive motor seat 3, stop after turn screw rod 12, by threaded engagement, motor cabinet 3 is located, rotation operation handwheel 13 again, turn screw rod 12, again on drive motor seat 3, move or move down.Motor 4 is housed on motor cabinet 3, is fixed with friction pulley 5 on the output shaft of motor 4, motor 4 can drive friction pulley 5 to rotate, and moving up and down of motor cabinet 3 can drive friction pulley 5 to move up and down.
In Fig. 1, transmission shaft 2 has two, two transmission shafts 2 parallel interval and arrange, and the axial direction of transmission shaft 2 parallels with the axial direction of the output shaft of motor 4, in Fig. 2 and 3, on every transmission shaft 2, equal fixed cover is provided with the inner ring of pair of bearings 14, on every transmission shaft 2, be also fixed with first flywheel 6, as shown in Figure 1, the first flywheel 6 on two transmission shafts 2 is positioned at the both sides of friction pulley 5, in the present embodiment, two the first belows of flywheel 6 in friction pulley 5.The friction pulley 5 that the first flywheel 6 on two transmission shafts 2 can be rotated drives rotation by rubbing action simultaneously.Shown in Fig. 1 and 2, when concrete operations, first turn operation handwheel 13, motor cabinet 3 is moved on motor 4 is together with friction pulley 5, make friction pulley 5 disengage two the first flywheels 6, then drive friction pulley 5 to rotate by motor 4, after the rotational speed of friction pulley 5 reaches required velocity amplitude, again turn handwheel 13, motor 4 and friction pulley 5 are moved down, and friction pulley 5 touches the first flywheel 6 on two transmission shafts 2, by rubbing action, friction pulley 5 drives two the first flywheels 6 to rotate simultaneously, the rotational speed value of two the first flywheels 6 can reach identical with the velocity amplitude of friction pulley 5, and the direction of the rotational speed of two the first flywheels 6 is identical, but contrary with the sense of rotation of friction pulley 5, when two the first flywheels 6, rotation can make the inner ring of two pairs of bearings 14 along with transmission shaft 2 separately rotates together.
In Fig. 1 and 3, on installing plate 1, be also provided with mount pad 7, on mount pad 7, be supported with the outer ring of bearing 14, as shown in Figure 2.In the present embodiment, mount pad 7 has two groups, and two groups of mount pads 7 arrange along the longitudinal direction interval of transmission shaft 2, so every group of corresponding outer ring of supporting a bearing in matched bearings 14 of mount pad 7.Every group of mount pad 7 includes base 71, two back-up blocks 72, two back-up blocks 72 by elastic component 73 be arranged on base 71 above, two back-up blocks 72 arrange along the horizontal direction interval of transmission shaft 2, the corresponding bearing supporting in two pairs of bearings 14 of a back-up block 72 of every group of mount pad 7, in the present embodiment, each back-up block 72 adopts V-block, as shown in Figure 3, the V-type surface of V-block provides bearing 14 outer rings stable supporting and location, moreover, for the outer ring of various outer diameter, adopt all energy stable support of V-block.In Fig. 1 and 3, pressing plate 9 can be arranged on mount pad 7 up or down, and pressing plate 9 can be positioned on mount pad 7 after moving or moving down at any time upper, the outer ring of bearing 14 can be pressed on the back-up block 72 of mount pad 7 by pressing plate 9, guarantees that the outer ring of bearing 14 is motionless.Driving by friction pulley 5 after the synchronized rotation of two the first flywheels 6 simultaneously, the inner ring of two pairs of bearings 14 is along with transmission shaft 2 synchronized rotation together separately, it is motionless that outer ring keeps, then turn operation handwheel 13, make to move on motor 4 and friction pulley 5, friction pulley 5 departs from two the first flywheels 6, such the first flywheel 6, transmission shaft 2, the inner ring of bearing 14 continues rotation under inertia effect, and due to the friction force between bearing enclose, cause the rotation of bearing inner race to stop gradually, which is long to the rotational time of bearing, show that this is little to the friction force between the Internal and external cycle of bearing.By comparing the rotational time of two pairs of bearings 14, which just can contrast superior with respect to the frictional behaviour of outer ring to the inner ring of bearing.Remove after friction pulley 5, the rotational time of matched bearings 14 is except based on frictional behaviour, and also, based on inertia size, inertia is larger, and the time of rotation is longer.In order to compare significantly the difference of the rotational time of two pairs of bearings 14, on two transmission shafts 2, fixed cover is provided with the second flywheel 15 respectively, for increasing weight.
In Fig. 2, on every transmission shaft 2, all there is the end difference 21,22,23 of different diameter of axle sizes, on every transmission shaft 2, the end difference 21 or 22 or 23 of each size all arranges in pairs, and the inner ring of pair of bearings 14 respectively fixed cover is located on the paired end difference of corresponding size, this transmission shaft 2 can be suitable for the bearing that different inner diameters is installed like this.In Fig. 2, pair of bearings 14 is arranged on the end difference 21 of minimum diameter of axle size, and end difference 23 is maximum diameter of axle size.
The bearing of different inner diameters size is arranged on the different end differences of transmission shaft 2, and adaptably, the mount pad 7 of spring bearing outer ring must move along the axial direction of transmission shaft 2.In Fig. 2, on installing plate 1, be bolted the guide rail 16 that two parallel interval are arranged, the longitudinal direction of guide rail 16 parallels with the longitudinal direction (coaxial direction) of transmission shaft 2, the base 71 of every group of mount pad 7 all can move along corresponding guide rail 16, base 71 can be positioned at any time on installing plate 1 after movement, in the present embodiment, location is realized by multiple elbow folders 8.Specifically, each elbow folder is all arranged on installing plate 1 by bolt, and each elbow folder 8 all has press block 81, and press block 81 can be pressed on base 71 on installing plate 1, realizes the location of base 71.On elbow folder 8, press block 81 is to move along the longitudinal direction of transmission shaft 2, after movement, locates at any time by threaded engagement, and the press block 81 of each like this elbow folder 8 all can adapt to locate the base 71 of diverse location.
On every transmission shaft 2, install after pair of bearings 14, the position of mount pad 7 is determined in position according to bearing 14 on transmission shaft 2, then locate mount pad 7 with the press block 81 of elbow folder 8, bearing 14 is placed on the back-up block 72 of mount pad 7, and move down pressing plate 9, make outer ring that pressing plate 9 compresses bearing 14 on back-up block 72.The first flywheel 6, the second flywheel 15 on transmission shaft 2, are installed, drive friction pulley 5 to rotate by motor 4, declined by handwheel 13 drive motor 4 again, thereby drive the first flywheel 6 of two transmission shafts 2 to rotate by friction pulley 5 simultaneously, then remove friction pulley 5, the rotational time of two pairs of bearings 14 of observation, realizes the contrast of the frictional behaviour of two pairs of bearings 14.In said process, pressing plate 9 on mount pad 7 move up and down and mobile after the specific implementation structure of location at any time, with motor cabinet 3 on guide rod 10 move up and down and mobile after the implementation structure of location be at any time identical, here underdraw following, on mount pad 7, be fixed with the guide rod that two intervals arrange and all extend along the vertical direction, pressing plate 9 can be set on the guide rod on mount pad 7 up or down, between two guide rods, be fixed with web joint, on pressing plate 9, be connected with the screw rod that extends and can rotate along the vertical direction, this screw flight is engaged in the threaded hole of web joint, this screw rod passes on the end of threaded hole and is provided with operation handwheel, by operation handwheel turn screw rod, realize moving up and down of pressing plate 9, location at any time after threaded engagement realizes pressing plate 9 and moves.
Around two transmission shafts 2, a pair of speed pickup is set, for detection of the rotational speed of two transmission shafts 2, a pair of speed pickup and control enclosure are electrically connected, after the rate signal of control enclosure acquisition speed sensor, go out the rotational speed value of two transmission shafts 2 by processes and displays, moreover, this control enclosure can also record or show the rotational speed of every transmission shaft 2 and the variation relation of time, is shown by curve map.This control enclosure is also electrically connected with motor 4, can control the output speed of this motor 4.
The device of the present embodiment, overall dimensions is less than 380mm*400mm*350mm, small volume, and device in main parts size except transmission shaft, flywheel, guide rod, other most of parts all adopt aluminium alloy to make, the weight of whole device is lighter.The parts that are fixed on installing plate all adopt bolt to install, and for convenience detach, the volume of the device after dismounting is less, is convenient for carrying and deposits.
Although the utility model is only described with regard to some exemplary embodiment, these descriptions should only not be construed as limiting as example.In the scope of recording at appended claims, do not departing from the utility model spirit and scope situation, various variations are all possible.
Claims (10)
1. one kind for contrasting the device of frictional behaviour of two pairs of bearings, comprise installing plate, transmission shaft, it is characterized in that: described transmission shaft has two, two described transmission shafts parallel interval and arrange, on every described transmission shaft, equal fixed cover is provided with the inner ring of pair of bearings, described device also comprises and can be arranged on up or down on described installing plate and can be positioned at the motor cabinet on this installing plate after moving or moving down upper, be contained in the motor on described motor cabinet, the friction pulley of fixed cover on the output shaft of described motor, respectively fixed cover on two described transmission shafts and the described friction pulley that can be rotated drive two the first flywheels of rotation by rubbing action simultaneously, can be fixedly installed on the mount pad on described installing plate, can be arranged on up or down on described mount pad and can be positioned on this mount pad and the outer ring of described bearing can be pressed on to the pressing plate on described mount pad after moving or moving down upper.
2. as claimed in claim 1 for contrasting the device of frictional behaviour of two pairs of bearings, it is characterized in that: the end difference all on every described transmission shaft with different diameter of axle sizes, on described every transmission shaft, the end difference of each size all in pairs arrange, and the inner ring of pair of bearings respectively fixed cover be located on the paired described end difference of corresponding size.
3. as claimed in claim 1 or 2 for contrasting the device of frictional behaviour of two pairs of bearings, it is characterized in that: described mount pad has two groups, described in two groups, mount pad arranges along the longitudinal direction interval of described transmission shaft, described in every group, mount pad includes and can be arranged on movably on described installing plate and can after movement, be positioned at the base on this installing plate along the longitudinal direction of described transmission shaft, be arranged on above described base and arrange and all can coordinate with described pressing plate along the horizontal direction interval of described transmission shaft two back-up blocks of the outer ring that clamps a bearing.
4. as claimed in claim 3 for contrasting the device of frictional behaviour of two pairs of bearings, it is characterized in that: described back-up block adopts V-block.
5. as claimed in claim 3 for contrasting the device of frictional behaviour of two pairs of bearings, it is characterized in that: described device also comprises the multiple elbow folders that are arranged on described installing plate, and each elbow folder all has and can move and can after movement, locate and described base can be pressed on to the press block on described installing plate along the longitudinal direction of described transmission shaft.
6. as claimed in claim 1 for contrasting the device of frictional behaviour of two pairs of bearings, it is characterized in that: on two described transmission shafts, fixed cover is provided with the second flywheel respectively.
7. as claimed in claim 1 for contrasting the device of frictional behaviour of two pairs of bearings, it is characterized in that: described device also comprise a pair of speed pickup of the rotational speed that can measure respectively two described transmission shafts, all with the be electrically connected control enclosure of the rotational speed value that can show two described transmission shafts of described a pair of speed pickup.
8. as claimed in claim 7 for contrasting the device of frictional behaviour of two pairs of bearings, it is characterized in that: described control enclosure be also with described motor the be electrically connected output speed that can control this motor and the controller that can record or show the rotational speed of every described transmission shaft and the variation relation of time.
9. as claimed in claim 1 for contrasting the device of frictional behaviour of two pairs of bearings, it is characterized in that: on described installing plate, be fixed with the guide rod that many intervals arrange and all extend along the vertical direction, described motor cabinet can be set on the guide rod on described installing plate up or down, between at least two described guide rods, be fixed with web joint, on described motor cabinet, be connected with the screw rod that extends and can rotate along the vertical direction, this screw flight is engaged in the threaded hole of described web joint, and this screw rod passes on the end of described threaded hole and is provided with operation handwheel.
10. as claimed in claim 1 for contrasting the device of frictional behaviour of two pairs of bearings, it is characterized in that: on described mount pad, be fixed with the guide rod that many intervals arrange and all extend along the vertical direction, described pressing plate can be set on the guide rod on described mount pad up or down, between at least two described guide rods, be fixed with web joint, on described pressing plate, be connected with the screw rod that extends and can rotate along the vertical direction, this screw flight is engaged in the threaded hole of described web joint, and this screw rod passes on the end of described threaded hole and is provided with operation handwheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320541821.7U CN203595605U (en) | 2013-08-28 | 2013-08-28 | Device for comparing friction performances of two pairs of bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320541821.7U CN203595605U (en) | 2013-08-28 | 2013-08-28 | Device for comparing friction performances of two pairs of bearings |
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| CN203595605U true CN203595605U (en) | 2014-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320541821.7U Expired - Fee Related CN203595605U (en) | 2013-08-28 | 2013-08-28 | Device for comparing friction performances of two pairs of bearings |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969915A (en) * | 2017-03-28 | 2017-07-21 | 浙江工业大学之江学院 | The many specification rolling bearing test tables of apical axis type that a kind of electric cylinder is clamped |
| CN109253880A (en) * | 2018-10-08 | 2019-01-22 | 罗镜波 | A kind of bearing lubrication degree contrast test equipment |
| CN111397898A (en) * | 2020-03-26 | 2020-07-10 | 武汉理工大学 | Bearing friction resistance moment detection device |
| CN113049154A (en) * | 2021-03-10 | 2021-06-29 | 上海交通大学 | Space momentum wheel bearing friction torque testing machine and testing method thereof |
| CN113218659A (en) * | 2021-06-07 | 2021-08-06 | 燕山大学 | Rolling mill bearing fault diagnosis and life evaluation simulation test bed |
| CN114659788A (en) * | 2022-05-23 | 2022-06-24 | 哈尔滨科锐同创机模制造有限公司 | Friction testing device of bearing tester |
-
2013
- 2013-08-28 CN CN201320541821.7U patent/CN203595605U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969915A (en) * | 2017-03-28 | 2017-07-21 | 浙江工业大学之江学院 | The many specification rolling bearing test tables of apical axis type that a kind of electric cylinder is clamped |
| CN106969915B (en) * | 2017-03-28 | 2019-02-01 | 浙江工业大学之江学院 | A kind of more specification rolling bearing test tables of apical axis type that electric cylinder clamps |
| CN109253880A (en) * | 2018-10-08 | 2019-01-22 | 罗镜波 | A kind of bearing lubrication degree contrast test equipment |
| CN109253880B (en) * | 2018-10-08 | 2020-10-30 | 马鞍山司匹诺机械科技有限公司 | Bearing lubrication degree contrast test equipment |
| CN111397898A (en) * | 2020-03-26 | 2020-07-10 | 武汉理工大学 | Bearing friction resistance moment detection device |
| CN111397898B (en) * | 2020-03-26 | 2021-06-11 | 武汉理工大学 | Bearing friction resistance moment detection device |
| CN113049154A (en) * | 2021-03-10 | 2021-06-29 | 上海交通大学 | Space momentum wheel bearing friction torque testing machine and testing method thereof |
| CN113218659A (en) * | 2021-06-07 | 2021-08-06 | 燕山大学 | Rolling mill bearing fault diagnosis and life evaluation simulation test bed |
| CN113218659B (en) * | 2021-06-07 | 2022-05-24 | 燕山大学 | Rolling mill bearing fault diagnosis and life evaluation simulation test bed |
| CN114659788A (en) * | 2022-05-23 | 2022-06-24 | 哈尔滨科锐同创机模制造有限公司 | Friction testing device of bearing tester |
| CN114659788B (en) * | 2022-05-23 | 2022-08-09 | 哈尔滨科锐同创机模制造有限公司 | Friction testing device of bearing tester |
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| 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: 20140514 Termination date: 20210828 |