CN103713149A - Speed measuring device - Google Patents
Speed measuring device Download PDFInfo
- Publication number
- CN103713149A CN103713149A CN201210370923.7A CN201210370923A CN103713149A CN 103713149 A CN103713149 A CN 103713149A CN 201210370923 A CN201210370923 A CN 201210370923A CN 103713149 A CN103713149 A CN 103713149A
- Authority
- CN
- China
- Prior art keywords
- measuring device
- speed measuring
- buffer unit
- electric tool
- magnetic force
- 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.)
- Pending
Links
Images
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a speed measuring device applied to an electric tool. The speed measuring device comprises a buffer component which is provided with a magnetic component, a magnetic sensor which is arranged around the magnetic component and can generate a corresponding signal according to a received changed magnetic field. The buffer component is detachably arranged on the electric tool, and can rotate with the rotation of a motor of the electric tool. According to the invention, stress on the magnetic component, which is caused by a press-fit operation, is avoided; a centrifugal force which is produced by high-speed rotation of a rotor and/or an impact force which is produced by severe vibration of the electric tool can be buffered; the damage of the magnetic component is avoided; normal work of the speed measuring device and the whole electric tool can be ensured; and when the magnetic component is maintained, the problem of pressure of the magnetic component on press-fit is eliminated.
Description
Technical field
The present invention relates to the technical field of lightweight power tool; Specifically, the present invention relates to a kind of speed measuring device for aforementioned electric power driven tools.
Background technology
In order to realize some specific function of Portable electric instrument, such as constant speed, adjustment output speed etc., the rotor speed that detects electric tool is very important.Below in conjunction with weak point and the limitation that can understand the description of Fig. 1 in speed measuring device of the prior art and application thereof.
It shown in Fig. 1, is the schematic diagram of the speed measuring device of electric tool of the prior art.In the drawings, Reference numeral 1 represents the rotor of motor, and 2 represent commutator, and 3 represent magnetic force parts, and 4 represent magnetic sensor, and 5 represent radiator fan.In use, the effect of commutator is when motor coil rotates to a certain position, to change sense of current, so that motor can continue rotation, thereby driven tool head carries out operation.Radiator fan 5 is used for to heat radiations such as motor, commutators 2.
In Fig. 1, the functional part of speed measuring device mainly comprises magnetic force parts 3 and magnetic sensor 4.In the prior art, magnetic force parts 3 are normally arranged in one end of armature spindle in the mode being press-fitted, and magnetic sensor 4 is fixedly mounted in magnetic force parts 3 around, is used for detecting velocity of rotation.Can understand, its principle testing the speed is, when electrical power is worked, magnetic force parts 3 rotate together with rotor 1, the magnetic force parts 3 of rotation are by the magnetic field changing, and the signal changing in magnetic sensor (including inductor) 4, the rotating speed that rotating speed output unit can calculate according to this signal output.In the prior art, electric tool is also conventionally designed with speed regulator and rotating speed output unit is not set separately, and the voltage that magnetic sensor produces is switched to speed regulator, the signal judgement that speed regulator produces according to magnetic sensor and/or the speed of control rotor 1.
In the prior art, magnetic force parts 3 in aforementioned one end that is arranged on rotor in the mode being press-fitted are to use the composite material being comprised of ferrite and nylon, can be magnetized to make, in order to ensure its strong magnetic force, essential keep lower nylon ratio in composite material, make like this magnetic force parts often fragility strengthen and insufficient rigidity.In particular, in the mode to be press-fitted, this magnetic force parts 3 are installed to rotor 1 when interior, to magnetic force parts 3, cause extruding can produce therein stress; When running up of rotor 1 operation produces the high vibration of centrifugal force and/or electric tool, magnetic force parts 3 are also easily destroyed.In brief, in the installation of magnetic force parts 3 and work, all likely can destroy magnetic force parts, cause the rotational speed that magnetic sensor 4 can not detection rotor, the even whole electric tool of speed measuring device is all by cisco unity malfunction.In addition, when safeguarding magnetic force parts, be also difficult to control the pressure that is press-fitted magnetic force parts.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of speed measuring device for electric tool, and magnetic force parts are wherein difficult for wrecking.
In order to solve the problems of the technologies described above, the invention provides a kind of speed measuring device for electric tool, described speed measuring device comprises:
Buffer unit, it is provided with magnetic force parts;
Magnetic sensor, described magnetic sensor is arranged on described magnetic force parts around and can produces corresponding signal according to the magnetic field of received variation,
Wherein, described buffer unit is installed on described electric tool removably, and can be along with the rotation of the motor of electric tool and rotate.
According to the speed measuring device for electric tool of setting like this, avoided the mode to be press-fitted directly magnetic force parts to be arranged in one end of armature spindle, can not form the stress bringing by being press-fitted operation; In addition, due to the existence of buffer unit, also cushioned the impulsive force when rotor high-speed rotation produces centrifugal force and/or the high vibration at electric tool.These are all conducive to prevent that magnetic force parts are damaged, guarantee the normal work of speed measuring device and even whole electric tool; When the safeguarding of magnetic force parts, also eliminated the stress problems that it is press-fitted.
Alternatively, in foregoing speed measuring device, the motor of described electric tool comprises armature spindle, and described buffer unit is installed on rotor the tip of the axis.According to the speed measuring device of setting like this, buffer unit and rotor the tip of the axis assemble in the mode of screw thread and needn't adopt and be press-fitted, and can avoid extrusion stress to buffer unit, extend serviceable life of buffer unit.In addition, the use of the above-mentioned helicitic texture of electric tools can also improve efficiency of assembling, makes to be easy to change corresponding parts.
Alternatively, in foregoing speed measuring device, the described end of described armature spindle is provided with screw thread, is provided with the screw thread being suitable for the threaded engagement of described armature spindle on described buffer unit, is reached and is removed and installed between the two by threaded engagement.According to the speed measuring device of setting like this, buffer unit and rotor the tip of the axis assemble in the mode of screw thread and needn't adopt and be press-fitted, and can avoid extrusion stress to buffer unit, extend serviceable life of buffer unit.In addition, the use of the above-mentioned helicitic texture of electric tools can also improve efficiency of assembling, makes to be easy to change corresponding parts.
Alternatively, in foregoing speed measuring device, on described buffer unit, be provided with the structure that is suitable for screwing described buffer unit, on the middle part outside surface of described buffer unit, be provided with the groove around described buffer unit, above-mentioned magnetic force parts are the magnet ring being entrenched in described groove, on the bottom of groove, are designed with annular knurl.According to the speed measuring device of setting like this, the advantage of existence comprises: the structure that is suitable for screwing has facilitated the handling of buffer unit; By magnetic force parts are contained in, on buffer unit, make magnetic force parts neither can bear direct impact from electric tool, can maintain normal work again and move, be conducive to extend the life-span of these magnetic force parts, meanwhile, magnetic force parts are entrenched in and in groove, make the not slippage vertically on buffer unit of magnetic force parts, assembling more stable; Annular knurl is designed with to be beneficial to and prevents that magnetic force parts or magnet ring are due to the job insecurity that radially fluffs and produce.
Alternatively, in foregoing speed measuring device, described speed measuring device is outside equipped with dust cover, and dust cover is fixedly installed on the housing of electric tool, and above-mentioned magnetic sensor is installed on dust cover.According to the electric tool of setting like this, dust cover has advantageously prevented the pollution of dust to speed measuring device, is conducive to maintain its longer mission life.
Alternatively, in foregoing speed measuring device, the described end of described armature spindle is supported by roller bearing, and, threaded one end of tool of described buffer unit is stated the inner ring of roller bearing from the side against residence, the outer ring of described roller bearing is fastening by the flange of dust cover.According to the speed measuring device of setting like this, utilize its existing each parts advantageously to realize installation and the location of bearing, realized the suitable assembling of armature spindle, simple in structure, space availability ratio is high, be skillfully constructed.More preferably, the flange of described dust cover can, by being stuck in the outer ring of the fastening described roller bearing of metal platen in described flange, make the fixing more firm of bearing.In optional embodiment, the bearing seat of described dust cover and described roller bearing arranges integratedly.
Alternatively, in foregoing speed measuring device, the pole number of described magnetic force parts is the even number between 2 to 24.Can understand, arrange like this pole number more time detection meeting relatively sensitive.
Alternatively, also have speed regulator in foregoing speed measuring device, described speed regulator receives the signal of the variation of described speed measuring device generation, and according to described signal, adjusts the rotating speed of described rotor.Can understand, this electric tool can be carried out speed governing, the working condition of electric tool is adjusted rotor by speed regulator according to described signal.
Accompanying drawing explanation
With reference to accompanying drawing, disclosure of the present invention will be more obvious.Should understand, these accompanying drawings are the object for illustrating only, and is not intended to protection scope of the present invention to be construed as limiting.In figure:
Fig. 1 is the schematic diagram of the speed measuring device for electric tool of prior art;
Fig. 2 is according to the cross-sectional schematic of the speed measuring device for electric tool of the present invention embodiment;
Fig. 3 is according to the structural representation of the buffer unit of the speed measuring device in above-mentioned embodiment of the present invention; And
Fig. 4 is the mounting structure schematic diagram in dust cover according to the magnetic sensor of the speed measuring device in above-mentioned embodiment of the present invention.
Embodiment
Explain with reference to the accompanying drawings the specific embodiment of the present invention.
Fig. 2 is according to the cross-sectional schematic of the speed measuring device for electric tool of the present invention embodiment.In the figure, Reference numeral 11 represents the rotor of the motor of electric tool, 12 represent bearing, and 13 represent buffer unit, and 14 represent dust cover, 15 represent magnetic sensor, 16 represent speed regulator, and 17 represent the stator of the motor of electric tool, and 18 represent the housing of electric tool, 19 represent commutator, and 20 represent magnetic force parts.
As can be seen from the figure, according to the speed measuring device in present embodiment, be arranged on the whole the place, one end of the armature spindle of electric tool, mainly comprise buffer unit 13 and the magnetic sensor 15 with magnetic force parts 20, be described below.
In this embodiment, in order to overcome as in prior art, magnetic force parts are directly press fit over to the shortcoming of bringing in armature spindle, as shown in the figure, buffer unit 13 is arranged on electric tool removably, and can be along with the rotation of the motor of electric tool and rotate.Magnetic force parts 20 can be assembled or be fixed on by buffer unit 13 end of armature spindle of the motor of electric tool indirectly, 15 of magnetic sensors can be arranged on magnetic force parts 20 around or near, like this, magnetic force parts 20 rotate together with rotor 11, and the signal that the magnetic field of the variation that can produce changes magnetic sensor 15 in rotation, for testing the speed and/or speed governing provides foundation.Compare known with the mounting means of magnetic force parts in prior art, the introducing of buffer unit 13 has cushioned centrifugal action and/or the impulsive force when the high vibration of electric tool producing when rotor high-speed rotates, and these are all conducive to prevent that magnetic force parts 13 are damaged.In Fig. 3, specifically illustrated the concrete structure of the buffer unit 13 in present embodiment, can describe in detail it hereinafter, the fixed form of magnetic force parts 20 on buffer unit 13 has been described simultaneously.
From figure, it can also be seen that, in present embodiment, dust cover 14 has mounting flange, this flange fastens the outer ring of roller bearing 12 from the lateral surface of the outer ring of roller bearing 12, and the inner ring fixed cover of bearing 12 is located on armature spindle, and one side by female one end of tool of buffer unit 13 from the side against.In course of normal operation, buffer unit 13(is inconjunction with magnetic force parts 20) and the inner ring of bearing 12 along with armature spindle rotates and rotation together relative to housing, the relative housing in outer ring of dust cover 14 and bearing 12 keeps motionless.The bearing seat of dust cover 14 and roller bearing 12 also can arrange integratedly, thereby becomes a part for electric machine casing.At this, it should be noted that roller bearing 12 can be that roller bearing, ball bearing etc. are beneficial to the suitable bearing that bears radial load.
Teaching in conjunction with Fig. 2 and above description can be understood, in use, this electric tool can be powered by AC network, when rotating to a certain position, motor coil changes direction of current by commutator 19, so that the rotor 11 that motor can make motor under the control of speed regulator 16 rotating speed rotation as required, for the tool heads (not shown) of electric tool provides power.Speed measuring device with regard to this electric tool, magnetic force parts 20 on buffer unit 13 can rotate under the drive of armature spindle, magnetic sensor 15 can detect the magnetic field of variation when 20 rotation of magnetic force parts, magnetic field by the variation that detects produces corresponding signal, this signal is transported to after rotating speed output unit or speed regulator 16,16 rotating speeds that judged or adjusted the rotor of electric tool by the signal receiving of rotating speed output unit or speed regulator.
Fig. 3 is according to the structural representation of the buffer unit of the speed measuring device in above-mentioned embodiment of the present invention.In the figure, Reference numeral 131 represents the female thread portion of buffer unit 13, and 132 represent the groove on buffer unit 13, and 133 represent the structure that screws that is suitable for screwing.
As can be seen from the figure, the buffer unit 13 in present embodiment is roughly the configuration of special nut, can be provided with magnetic force parts 20(and see Fig. 2 on it).This buffer unit 13 has three sections of different architectural features.
In present embodiment, the rotor the tip of the axis of electric tool is provided with external thread (see figure 2), so one end of buffer unit 13 can be configured to be suitable for the internal thread 131 coordinating with this external thread, makes buffer unit 13 roughly be the configuration of nut.The buffer unit 13 that is provided with like this internal and external threads has advantages of the dismounting of being convenient to and is convenient to machining, and, even repeatedly from this buffer unit 13 of armature spindle dismounting, can not damage magnetic force parts 20 yet, thereby affect the performance of magnetic force parts 20.But, those skilled in the art can understand, the design of this screw thread also can change at rotor the tip of the axis and internal thread is set, in the respective end setting of buffer unit 13, be suitable for the external thread with this screw-internal thread fit, and certainly, this has realized advantages such as being convenient to dismounting too; But the internal thread on nut is easier to processing comparatively speaking.
For the ease of the dismounting of operation buffer unit 13, what on buffer unit 13, the other end contrary with threaded one end can be configured to be suitable for to screw this buffer unit screws structure 133.In the illustrated embodiment this to screw structure 133 be to be suitable for applying the outer hexagonal structure that spanner screws.According to these teachings, those skilled in the art is easy to understand, and also can adopt the interior hexagonal structure that is suitable for other tool operation herein, or be designed to be suitable for the manually operated structure of operating personnel etc.
On the middle part lateral surface of buffer unit 13, be provided with the groove 132 around buffer unit 13; In corresponding design, magnetic force parts 20 can be entrenched in this groove 132, be socketed in this part of buffer unit 13, for example, be the form of magnet ring as shown in Figure 2.Particularly, now buffer unit 13 can be by metal material make, magnetic force parts 20 are made by the composite material that can be magnetized.For example, thereby metal buffer parts 13 are being inserted after mould formation die cavity, can inject composite material to form ring-type magnetic force parts 20, now, magnetic force parts 20 and the buffer unit 13 of ring-type become the assembly connecting together.Magnetic force parts 20 be embedded in groove 132 interior will make its not slippage vertically on buffer unit 13, assembling more stable.In preferred embodiment, in order to prevent that buffer unit 13 or magnetic force parts 20 from, due to the job insecurity that radially fluffs and produce, can arrange annular knurl on the bottom surface of groove 132, or design other anti-skidding feature.In the present embodiment, magnetic force parts 20 can have the even number of poles between 2 to 24, are preferably 16.
Fig. 4 is the mounting structure schematic diagram in dust cover according to the magnetic sensor of the speed measuring device in above-mentioned embodiment of the present invention.In the figure, Reference numeral 151 represents the inductor of sensors 15, and 152 represent the shell of sensors 15, and 153 represent the latch part on shells 152, and 141 represent the flange of dust cover, and 142 represent to be stuck in the metal platen on the flange of dust cover.
As can be seen from the figure, magnetic sensor 15 is arranged in dust cover 14 by shell 152, as figure, latch part 153 on shell 152 is connected to the Kong Buchu on dust cover 14, speed measuring device and magnetic sensor 15 are placed in dust cover 14, the cleaning that effectively maintains magnetic sensor with this, guarantees its serviceable life and result of use.Magnetic sensor 15 mainly comprises inductor 151 and shell 152, it is immobilizated on housing with the locking of dust cover 14 by shell 152, thereby inductor 151 be fastened in shell 152 and keep fixing relative position with shell 152, dust cover 14, take that this keeps being positioned at desired location and providing stable signal as speed regulator 16 of sensor 15.In optional embodiment, the form of plastic casing can be made by plastic material, be to magnetic sensor shell 152.The fastening means of inductor 151 in shell 152 can be also variation and needn't stick to certain specific mode, and for example, in a kind of optional embodiment, inductor 151 is that the resin by pouring into a mould in plastic casing is fixed on this wherein.
In the flange of illustrated dust cover 14, can also be arranged with metal platen 142, can make in a preferred embodiment it for the outer ring of fastening bearing 12, make snap-in force more greatly, more firm.This metal platen 142 is provided with a perforation so that armature spindle from perforation through.
As mentioned above, with reference to accompanying drawing, the embodiment of the speed measuring device for electric tool of the present invention is had been described in detail, these electric tools are such as but not limited to electric drill, electric screw driver, electric hammer, electric pick etc.In the situation that not deviating from according to the spirit and scope of the present invention; those skilled in the art can carry out remodeling and thereby modification forms new technical scheme to embodiments of the present invention; but should understand; these new technical schemes are also equal to directly and have been documented in this instructions undoubtedly, and they also fall within by the determined protection domain of appending claims.
Claims (10)
1. for a speed measuring device for electric tool, described speed measuring device comprises:
Buffer unit, it is provided with magnetic force parts;
Magnetic sensor, described magnetic sensor is arranged on described magnetic force parts around and can produces corresponding signal according to the magnetic field of received variation,
It is characterized in that, described buffer unit is installed on described electric tool removably, and can be along with the rotation of the motor of electric tool and rotate.
2. speed measuring device as claimed in claim 1, is characterized in that, the motor of described electric tool comprises armature spindle, and described buffer unit is installed on rotor the tip of the axis.
3. speed measuring device as claimed in claim 2, is characterized in that, the described end of described armature spindle is provided with screw thread, is provided with the screw thread being suitable for the threaded engagement of described armature spindle on described buffer unit, is reached and is removed and installed between the two by threaded engagement.
4. speed measuring device as claimed in claim 3, it is characterized in that, on described buffer unit, be provided with the structure that is suitable for screwing described buffer unit, on the middle part outside surface of described buffer unit, be provided with the groove around described buffer unit, above-mentioned magnetic force parts are the magnet ring being entrenched in described groove, on the bottom of groove, are designed with annular knurl.
5. the speed measuring device as described in any one in claim 1 to 4, is characterized in that, described speed measuring device is outside equipped with dust cover, and dust cover is fixedly installed on the housing of electric tool, and above-mentioned magnetic sensor is installed on dust cover.
6. speed measuring device as claimed in claim 5, it is characterized in that, the described end of described armature spindle is supported by roller bearing, and, threaded one end of tool of described buffer unit is stated the inner ring of roller bearing from the side against residence, the outer ring of described roller bearing is fastening by the flange of dust cover.
7. speed measuring device as claimed in claim 6, is characterized in that, the flange of described dust cover is by being stuck in the outer ring of the fastening described roller bearing of metal platen in described flange.
8. speed measuring device as claimed in claim 6, is characterized in that, the bearing seat of described dust cover and described roller bearing arranges integratedly.
9. speed measuring device as claimed in claim 1, is characterized in that, the pole number of described magnetic force parts is the even number between 2 to 24.
10. the speed measuring device as described in any one in claim 1 to 4, is characterized in that, described electric tool also has speed regulator, and described speed regulator receives the signal of the variation of described speed measuring device generation, and according to described signal, adjusts the rotating speed of described rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210370923.7A CN103713149A (en) | 2012-09-29 | 2012-09-29 | Speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210370923.7A CN103713149A (en) | 2012-09-29 | 2012-09-29 | Speed measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103713149A true CN103713149A (en) | 2014-04-09 |
Family
ID=50406283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210370923.7A Pending CN103713149A (en) | 2012-09-29 | 2012-09-29 | Speed measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103713149A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4385276A (en) * | 1980-01-28 | 1983-05-24 | Black & Decker Inc. | Mounting of semiconductor sensing means for an electromagnetic tachometer in a portable electric tool |
| EP0126253A1 (en) * | 1983-04-20 | 1984-11-28 | Robert Bosch Gmbh | Hand tool machine, especially a drilling machine |
| CN101517210A (en) * | 2006-09-26 | 2009-08-26 | 大陆汽车有限责任公司 | Element which generates a magnetic field |
| US20100072983A1 (en) * | 2006-07-25 | 2010-03-25 | Ponnappan Rajendran | Hub mountable speed sensing device |
-
2012
- 2012-09-29 CN CN201210370923.7A patent/CN103713149A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4385276A (en) * | 1980-01-28 | 1983-05-24 | Black & Decker Inc. | Mounting of semiconductor sensing means for an electromagnetic tachometer in a portable electric tool |
| EP0126253A1 (en) * | 1983-04-20 | 1984-11-28 | Robert Bosch Gmbh | Hand tool machine, especially a drilling machine |
| US20100072983A1 (en) * | 2006-07-25 | 2010-03-25 | Ponnappan Rajendran | Hub mountable speed sensing device |
| CN101517210A (en) * | 2006-09-26 | 2009-08-26 | 大陆汽车有限责任公司 | Element which generates a magnetic field |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101048750B1 (en) | Wind power generator | |
| WO2013029524A1 (en) | Rotating magnetic field downhole power generation device | |
| CN106216033A (en) | A kind of permagnetic synchronous motor direct-drive type energy-saving ball mill | |
| CN108808973B (en) | Double-shaft magnetic suspension bearing reluctance motor | |
| US9912190B2 (en) | Energy supply method and device for monitoring wireless sensor node of roller | |
| US10181768B2 (en) | Energy harvester and rotating shaft vibration sensor | |
| JP2010149251A (en) | Impact type screwing device | |
| US9780627B2 (en) | Electric motor having a stator and a rotor | |
| CN103713149A (en) | Speed measuring device | |
| CN103982541B (en) | Large-scale high-speed conical roller bearing with automatic power supply monitoring for electric power facility | |
| CN213450894U (en) | Magnetic suspension centrifugal air compressor system | |
| CN201393106Y (en) | Permanent magnet modular type brushless direct current motor | |
| CN202918167U (en) | DC brushless motor | |
| TWI458888B (en) | A power generation system that can supply electricity to a rotating member | |
| CN101826778A (en) | Electric motor with torque sensor | |
| CN107370321B (en) | A kind of motor of dust collector and dust catcher | |
| KR101038904B1 (en) | Wind Power Generator | |
| CN209275543U (en) | Intelligent belt converyor roller | |
| CN201774427U (en) | Brushless motor with outer rotor for soy milk grinder | |
| CN206226222U (en) | One kind is new to survey axle torque motor | |
| CN102882343A (en) | Direct-current permanent-magnet brushless motor with internal encoder | |
| CN202042990U (en) | Brushless motor with outer rotor for range hood | |
| CN202889159U (en) | Direct-current permanent magnet brushless motor with built-in encoder | |
| CN221728031U (en) | Novel external rotor hub motor | |
| CN105424244B (en) | Non-contact self-generating wireless torque sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140409 |