CN2447985Y - Brushless DC motor with balancing piece fixing structure - Google Patents
Brushless DC motor with balancing piece fixing structure Download PDFInfo
- Publication number
- CN2447985Y CN2447985Y CN 00254562 CN00254562U CN2447985Y CN 2447985 Y CN2447985 Y CN 2447985Y CN 00254562 CN00254562 CN 00254562 CN 00254562 U CN00254562 U CN 00254562U CN 2447985 Y CN2447985 Y CN 2447985Y
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- CN
- China
- Prior art keywords
- stator
- balancing patch
- central siphon
- circuit board
- balancing
- 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 - Lifetime
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Abstract
The utility model relates to a brushless DC motor with balancing piece fixing structures, which comprises a casing, a stator, a rotor, and a circuit board, wherein, the stator is combined in a hole seat of the casing by a shaft tube; the rotor is pivoted in the shaft tube of the stator by a shaft lever; the circumference of the rotor is provided with an annular permanent magnet; a hole jacket which is fixed by the circuit board with the annular permanent magnet is positioned on the outer margins of the hole seat of the casing; balancing pieces are sheathed on the shaft tube of the stator; gaps are positioned between the central hole and the shaft tube; non-magnetic conductive bodies are arranged between the stator and the balancing pieces with intervals. The utility model can be conveniently fixed, the gaps between the metal shaft tube and pole pieces and the balancing pieces can be reserved, and the effects that the utility model does not conduct magnetism can be formed.
Description
The utility model is relevant for a kind of Brushless DC motor with balancing patch fixture construction, refer in particular to a kind of balancing patch of small-sized brushless d.c. motor, can conveniently be fixed, make this balancing patch become non-magnetic effect with maintenance one gap between metal central siphon and pole piece.
Please read shown in Figure 12, the U.S. the 6th that the applicant once applied for, 050, one preferred embodiment of No. 785 small heat-dissipating fan structure patent cases, establish a balancing patch 90 by this small-sized brushless d.c. motor, this balancing patch 90 is nested with base 91 at housing 9 by a fixing hole, this balancing patch 90 is fixed and forms not magnetic conduction with the central siphon 93 of stator 92, and by the permanent magnet 95 generation balance suction of this balancing patch 90 with rotor 94 peripheries, this suction can make rotor 94 balance and stabilities rotate on the stator 92.Please read shown in Figure 13, this patent case discloses the location notch 961 that balancing patch 90 has two location notchs, the 901 corresponding what circuit boards 96 of symmetry again, supply the location notch 961 of hook portion 922 grabs of stator 92 set reference columns 921, make balancing patch 90 that preferable fixing be arranged at circuit board 96.Please read shown in Figure 14ly, this patent case discloses balancing patch 90 again has two location holes 902 to pass for the reference column 923 of stators 92, and reference column 923 ends are hot pressed into hook portion 924, makes circuit board 96, balancing patch 90 in conjunction with on the what stator 92 and do not come off.Please read shown in Figure 15ly, this patent case more discloses circuit board 96, balancing patch 90 and stator 92 two location holes 962,903,925 respectively, passes for the reference column 97 of housing 9, but makes circuit board 96, balancing patch 90 and stator 92 ease of assembly and fixing effect.
Learn from above-mentioned patent case, provide the permanent magnet of balancing patch and rotor peripheries to produce balance suction, rotor stability is rotated on the stator, it is fixing that this balancing patch will reach, and can not produce the magnetic conduction problem with the pole piece and the central siphon of stator, therefore, on it is made trouble and inconvenience.
The purpose of this utility model provides a kind of Brushless DC motor with balancing patch fixture construction, and it can be the assembled easily location of balancing patch and fixing, and and the pole piece and central siphon of stator between, do not have the magnetic conduction problem.
The purpose of this utility model is achieved in that a kind of Brushless DC motor with balancing patch fixture construction, comprises housing, stator, and rotor, circuit board, its middle shell are provided with a hole seat; Stator is to be combined in the hole seat of housing by a central siphon; Rotor is to be articulated in the central siphon of stator by axostylus axostyle, and rotor peripheries is established a ring permanent magnet; Circuit board is nested with its fixing hole is having the hall sensor electronic component on the seat outer rim of the hole of housing and on this circuit board, and it is characterized in that: the central siphon of stator is provided with the balancing patch of establishing with its center borehole jack, and is gapped between this centre bore and central siphon; Between stator and balancing patch every being provided with not magnetic conductor.
The hole seat of described housing forms the pipe that protrudes.
Described balancing patch has the breach that becomes isogonism to distribute according to centre bore.
Described not magnetic conductor comprises a planar rings and a pipe, and this planar rings is isolated the pole piece bottom and the balancing patch of stator, between the centre bore and central siphon of this pipe Jie what balancing patch.
Described balancing patch and circuit board are fixed on the housing.
Described stator is provided with projection, and this projection is pressed in not on the magnetic conductor.
Owing to adopt such scheme: can be fixed easily, make this balancing patch can and metal central siphon and pole piece between keep a gap, form non-magnetic effect.
See also appended graphicly, the utility model lifted the following example explanation:
Fig. 1 first preferred embodiment exploded perspective view of the present utility model.
Fig. 2 first preferred embodiment combination of the present utility model top view.
The 33 line sectional drawings of Fig. 3 Fig. 2.
Fig. 4 second preferred embodiment exploded perspective view of the present utility model.
Fig. 5 of the present utility model second full embodiment makes up top view
The 6-6 line sectional drawing of Fig. 6 Fig. 5.
Fig. 7 the 3rd preferred embodiment exploded perspective view of the present utility model.
Fig. 8 the 3rd preferred embodiment combination of the present utility model top view
Fig. 9 is the 9-9 line sectional drawing of Fig. 8.
Figure 10 the 4th preferred embodiment exploded perspective view of the present utility model.
Figure 11 the 4th preferred embodiment combination of the present utility model top view.
The schematic partial sectional view of known structure one preferred embodiment of Figure 12.
The schematic partial sectional view of known structure two preferred embodiments of Figure 13.
The schematic partial sectional view of known structure three preferred embodiments of Figure 14.
The schematic partial sectional view of known structure four preferred embodiments of Figure 15.
The circuit theory diagrams of Figure 16 circuit board.
Please read shown in Figure 1, the fixing hole 121 that housing 11 is established hole seat 112 power circuit boards 12 by room 111 is nested with fixing, the peritreme of hole seat 112 also can be protruded and form pipe, and circuit board 12 has hall sensor 122 and other electronic components (genus prior art) on (as shown in figure 16).Balancing patch 13 is made by permeability magnetic material, and this balancing patch 13 is provided with centre bore 131, and this centre bore 131 has than major diameter, and when this balancing patch 13 was enclosed within the central siphon 141 of stator 14, centre bore 131 did not contact with central siphon 141, and the two has appropriate gap.Stator 14 can be made by known the whole bag of tricks, and this stator 14 has known central siphon 141, and central siphon 141 can be nested with at the hole of housing 11 seat 112 internal diameters.Rotor 15 peripheries have permanent magnet 151, and there is an axostylus axostyle 152 at the center of reaching, and axostylus axostyle 152 can pivot at central siphon 141 internal diameters of stator 14.Magnetic guiding loop 16 is not made a ring body by non-magnet_conductible material, this ring body has the planar rings 161 on plane, top and the pipe 162 that extends downwards, can be enclosed within the interstitial site of 141 of balancing patch 13 and central siphons by this pipe 162, and the pole piece 142 of balancing patch 13 with stator 14 be separated by planar rings 161
Please read Fig. 2, shown in 3, the combination situations of its first preferred embodiment, circuit board 12 is enclosed within the outer wall position of hole seat 112 by fixing hole 121, and stator 14 is combined in the inner wall position of hole seat 112 by central siphon 141, central siphon 141 outer walls cover balancing patch 13, and fill between balancing patch 13 and central siphon 141 by the pipe 162 of magnetic guiding loop 16 not, and the planar rings 161 of magnetic guiding loop 16 is not isolated the pole piece bottom 142 of stator 14 with balancing patch 13, make stator 14 and the balancing patch 13 can magnetic conduction, again and, borrow being fixed from stator 14, balancing patch 13 also can borrow magnetic guiding loop 16 not do by indirect press fixing, so, this balancing patch 13 is more convenient at assembling process, and can be so that balancing patch 13 obtains good fixing, by the permanent magnet 151 generation mutual attractions of balancing patch 13 with rotor 15, therefore, balancing patch 13 provides rotor 15 balance and stabilities rotations, and balancing patch 13 and 14 of stators do not have the magnetic conduction problem yet.
Please read shown in Figure 4ly, its this case second preferred embodiment mainly is by housing 21, circuit board 22, balancing patch 23, stator 24, rotor 25, member such as magnetic conductor 26 is not constituted.
The fixing hole 221 that housing 21 is established hole seat 212 power circuit boards 22 by room 211 is nested with fixing, and the peritreme of hole seat 212 also can be protruded and form pipe, and circuit board 22 has hall sensor 222 and other electronic components on (as shown in figure 16).Balancing patch 23 is made by permeability magnetic material, and balancing patch 23 is provided with centre bore 231, and this centre bore 231 has than major diameter, and when this balancing patch 23 was enclosed within the central siphon 241 of stator 24, centre bore 231 did not contact with central siphon 241, and the two has appropriate gap.Stator 24 can be made by known the whole bag of tricks, and this stator 24 has known central siphon 241, and central siphon 241 can be nested with at the hole of housing 21 seat 212 internal diameters.Rotor 25 peripheries have permanent magnet 251, and there is an axostylus axostyle 252 at the center of reaching, and axostylus axostyle 252 can pivot at central siphon 241 internal diameters of stator 24.Magnetic conductor 26 is not made by non-magnet_conductible material, it can form an en plaque, this not magnetic conductor 26 establish a hole 261, can be enclosed within the central siphon 241 of stator 24 by this hole 261, and when stator 24 is combined in hole seat 212, this not magnetic conductor 26 pressed by the pole piece bottom 242 of stator 24, by this not magnetic conductor 26 make indirect balancing patch 23 and the circuit board 22 of pressing; Therefore, can reach stable equilibrium sheet 23 and circuit board 22 purposes, balancing patch 23 can not contacted with the central siphon 241 and stator 24 pole piece 242 bottom of stator 24.
Please read shown in Fig. 5,6, the combination situations of its second preferred embodiment, circuit board 22 is enclosed within the outer wall position of hole seat 212 by fixing hole 221, be combined in the inner wall position of hole seat 212 by central siphon 241 to stator 24, central siphon 241 outer walls cover balancing patch 23 reaches not magnetic conductor 26, this not magnetic conductor 26 pole piece bottom 242 of stator 24 is isolated with balancing patch 23, make stator 24 public balancing patches 23 can not contact magnetic conduction, again and, borrow from being fixed of stator 24, balancing patch 23 also can borrow magnetic conductor 26 not do by indirect press fixing.So, this balancing patch 23 is more convenient at assembling process, and can make balancing patch 23 obtain good fixing, by the permanent magnet 251 generation mutual attractions of balancing patch 23 with rotor 25, therefore, balancing patch 23 provides rotor 25 steadily to rotate, and balancing patch 23 and 24 of stators do not have the magnetic conduction problem yet.
Please read shown in Figure 7ly, this case the 3rd preferred embodiment mainly is by housing 31, circuit board 32, balancing patch 33, stator 34, rotor 35, member such as magnetic conductor 36 is not constituted.
The fixing hole 321 that housing 31 is established hole seat 312 power circuit boards 32 by room 311 is nested with fixing, and the peritreme of hole seat 312 also can be protruded and form pipe, and circuit board 32 has hall sensor 322 and other electronic components on (as shown in figure 16).Balancing patch 33 is made by permeability magnetic material, balancing patch 33 is provided with centre bore 331, this centre bore 331 has than major diameter, when this balancing patch 33 is enclosed within the central siphon 341 of stator 34, centre bore 331 does not contact with central siphon 341, the two has appropriate gap, again, for making 351 generations of balancing patch 33 and rotor 35 permanent magnets that not excessive suitable suction mutually be arranged, balancing patch 33 itself can be provided with two breach 332 that become isogonism to distribute according to centre bore 331 centers, the hall sensor 322 that this breach 332 also can be utilized on the power circuit board 32 simultaneously protrudes, and makes the accurately change in polarity of sensing rotor 35 set permanent magnets 351 of this hall sensor 322.Stator 34 can be made by known the whole bag of tricks, this stator 34 has known central siphon 341, and central siphon 341 can be nested with at the hole of housing 31 seat 312 internal diameters, and this stator 34 is established the projection 343 of downward protrusion, projection 343 is a non-magnet_conductible material, can be pressed in not magnetic conductor 36 by this projection 343.Rotor 35 peripheries have permanent magnet 351, and there is an axostylus axostyle 352 at the center of reaching, and axostylus axostyle 352 can pivot at central siphon 341 internal diameters of stator 34.Magnetic conductor 36 is not made by non-magnet_conductible material, it can form an en plaque, this not magnetic conductor 36 establish a hole 361, can be enclosed within the central siphon 341 of stator 34 by this hole 361, and when stator 34 is combined in hole seat 312, this not magnetic conductor 36 pressed by protruding 343 of stator 34, therefore, magnetic conductor 36 can be not indirect presses balancing patch 33 and circuit board 32 for this, can reach the purpose of stable equilibrium sheet 33 and circuit board 32, and balancing patch 33 can not contacted with the central siphon 341 and stator 34 pole piece 342 bottom of stator 34.Again, magnetic conductor 36 is jagged 362 for this, and the hall sensor 322 of breach 362 on can power circuit board 32 passes through.
Please read Fig. 8, shown in 9, the combination situations of its 3rd preferred embodiment, circuit board 32 is enclosed within the outer wall position of hole seat 312 by fixing hole 321, and stator 34 is combined in the inner wall position of hole seat 312 by central siphon 341, central siphon 341 outer walls cover balancing patch 33 reaches not magnetic conductor 36, this not magnetic conductor 36 pole piece bottom 342 of stator 34 is isolated with balancing patch 33, make stator 34 and the magnetic conductor 36 not can magnetic conduction, again and, borrow being fixed from stator 34, balancing patch 33 also can borrow magnetic conductor 36 not do by indirect press fixing: so, this balancing patch 33 is more convenient at assembling process, and can be so that balancing patch 33 obtains good fixing, permanent magnet 351 by balancing patch 33 public rotors 35 produces suitable mutual attraction, therefore, balancing patch 33 provides rotor 35 steadily to rotate, and 34 of balancing patch 33 and stators do not have the magnetic conduction problem yet, and because balancing patch 33 is provided with breach 332, therefore, the mutual attraction size that the permanent magnet of balancing patch 33 and rotor 35 is 351 can be set with the shape size and the number number of breach 332.
Please read shown in Figure 10ly, its this case the 4th preferred embodiment mainly is by housing 41, circuit board 42, balancing patch 43, stator 44, rotor 45, member such as magnetic conductor 46 is not constituted.
The fixing hole 421 that housing 41 is established hole seat 412 power circuit boards 42 by room 411 is nested with fixing, and the peritreme of hole seat 412 also can be protruded and form pipe, and circuit board 42 has hall sensor 422 and other electronic components on (as shown in figure 16).Balancing patch 43 is made by permeability magnetic material, balancing patch 43 is provided with centre bore 431, this centre bore 431 has than major diameter, when this balancing patch 43 is enclosed within the central siphon 441 of stator 44, centre bore 431 does not contact with central siphon 441, the two has appropriate gap, again, for 451 generations of permanent magnet that make a balancing patch 43 and a rotor 45 have not excessive suitable mutual attraction, balancing patch 43 itself is provided with the several breach 432 that become isogonism to distribute according to centre bore 431 centers, by one breach 432 simultaneously the hall sensor 422 on the power circuit board 42 protrude, make the accurately change in polarity of sensing rotor 45 set permanent magnets 451 of this hall sensor 422.Stator 44 can be made by known the whole bag of tricks, and this stator 44 has known central siphon 441, and central siphon 441 can be nested with at the hole of housing 41 seat 412 internal diameters.Rotor 45 peripheries have permanent magnet 451, and there is an axostylus axostyle 452 at the center of reaching, and axostylus axostyle 452 can pivot at central siphon 441 internal diameters of stator 44.Magnetic conductor 46 is not made by non-magnet_conductible material, it can form a disk shape, this not magnetic conductor 46 establish a hole 461, can be enclosed within the central siphon 441 of stator 44 by this hole 461, and when stator 44 is combined in hole seat 412, this not magnetic conductor 46 pressed by the pole piece bottom 442 of stator 44, by this not magnetic conductor 46 make indirect balancing patch 43 and the circuit board 42 of pressing, therefore, can reach the purpose of stable equilibrium sheet 43 and circuit board 42, balancing patch 43 can not contacted with the central siphon 441 and stator 44 pole piece 442 bottom of stator 44.
Please read shown in Figure 11, the combination situations circuit board 42 of its 4th preferred embodiment is enclosed within the outer wall position of hole seat 412 by fixing hole 421, and stator 44 is combined in the inner wall position of hole seat 412 by central siphon 441, central siphon 441 outer walls cover balancing patch 43 reaches not magnetic conductor 46, balancing patch 43 does not contact with the central siphon 441 of stator 44, simultaneously this not magnetic conductor 46 also the pole piece bottom 442 of stator 44 is isolated (same as shown in Figure 9) with balancing patch 33, make stator 44 and the magnetic conductor 46 not can magnetic conduction, again and, borrow from being fixed of stator 44, balancing patch 43 also can borrow magnetic conductor 46 not do that indirect press fixing.The mutual attraction size that the permanent magnet of balancing patch 43 and rotor 45 is 451 can be adjusted setting with the breach 432 number numbers and the shape size of balancing patch 43.Therefore, this balancing patch 43 is more convenient at assembling process, and can be so that balancing patch 43 obtains good fixing, by the permanent magnet 451 generations suitable mutual attraction of balancing patch 43 with rotor 45, provide rotor 45 steadily to rotate, and balancing patch 43 and 44 of stators do not have the magnetic conduction problem yet.
The utility model is according to the described structure of claim 1, can by magnetic guiding loop not with the central siphon of balancing patch and stator and bottom pole piece isolate, make and do not have the magnetic conduction problem between balancing patch and stator, simultaneously, because this is the setting of magnetic guiding loop not, the making fixing and each member of this circuit board, balancing patch, stator and rotor also becomes easily, convenience.
The utility model is according to the described structure of claim 4, can balancing patch be fixedly secured by magnetic conductor not, and, guarantee balancing patch and the central siphon of stator and bottom pole piece do not contact, make and do not have the magnetic conduction problem between balancing patch and stator, simultaneously, because this not setting of magnetic guiding loop, the making fixing and each member of this circuit board, balancing patch, stator and rotor also becomes easily, convenience.
The utility model is according to claim 2,5 described structures, can learn by the technology that each embodiment of this case is disclosed, and can expect, the breach of this balancing patch can according to and rotor permanent magnet between the size of required mutual attraction, design its number number and shape size.
The utility model can make this balancing patch and circuit board be fixed by pressure valve at housing according to claim 3,6 described structures, so that the permanent magnet of this balancing patch and rotor can produce mutual attraction uniformly, and provides rotor to rotate more stably.
The utility model can not depart under the main spirit and feature, implements with other different form.Therefore, above-mentioned preferred embodiment is just enumerated by way of example, and it should be considered as restriction of the present utility model.Scope of the present utility model is defined by claim, but not is defined by the content of specification, and the variation or the modification that belong to the equivalence of what claim all are the what scopes of the present utility model that falls.
Claims (6)
1, a kind of Brushless DC motor with balancing patch fixture construction comprises housing, stator, and rotor, circuit board, its middle shell are provided with a hole seat; Stator is to be combined in the hole seat of housing by a central siphon; Rotor is to be articulated in the central siphon of stator by axostylus axostyle, and rotor peripheries is established a ring permanent magnet; Circuit board is nested with its fixing hole is having the hall sensor electronic component on the seat outer rim of the hole of housing and on this circuit board, and it is characterized in that: the central siphon of stator is provided with the balancing patch of establishing with its center borehole jack, and is gapped between this centre bore and central siphon; Between stator and balancing patch every being provided with not magnetic conductor.
2, the Brushless DC motor with balancing patch fixture construction as claimed in claim 1 is characterized in that: the hole seat of described housing forms the pipe that protrudes.
3, the Brushless DC motor with balancing patch fixture construction as claimed in claim 1 is characterized in that: described balancing patch has the breach that becomes isogonism to distribute according to centre bore.
4, the Brushless DC motor with balancing patch fixture construction as claimed in claim 1, it is characterized in that: described not magnetic conductor comprises a planar rings and a pipe, this planar rings is isolated the pole piece bottom and the balancing patch of stator, between the centre bore and central siphon of this pipe Jie what balancing patch.
5, the Brushless DC motor with balancing patch fixture construction as claimed in claim 1, it is characterized in that: described balancing patch and circuit board are fixed on the housing.
6, the Brushless DC motor with balancing patch fixture construction as claimed in claim 1, it is characterized in that: described stator is provided with projection, and this projection is pressed in not on the magnetic conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00254562 CN2447985Y (en) | 2000-09-19 | 2000-09-19 | Brushless DC motor with balancing piece fixing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00254562 CN2447985Y (en) | 2000-09-19 | 2000-09-19 | Brushless DC motor with balancing piece fixing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2447985Y true CN2447985Y (en) | 2001-09-12 |
Family
ID=33611789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00254562 Expired - Lifetime CN2447985Y (en) | 2000-09-19 | 2000-09-19 | Brushless DC motor with balancing piece fixing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2447985Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1941568B (en) * | 2005-09-22 | 2010-09-08 | 日本电产株式会社 | Brushless DC motor and manufacturing method thereof |
| CN110094350A (en) * | 2018-01-31 | 2019-08-06 | 建准电机工业股份有限公司 | Temperature sensing fan |
-
2000
- 2000-09-19 CN CN 00254562 patent/CN2447985Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1941568B (en) * | 2005-09-22 | 2010-09-08 | 日本电产株式会社 | Brushless DC motor and manufacturing method thereof |
| CN110094350A (en) * | 2018-01-31 | 2019-08-06 | 建准电机工业股份有限公司 | Temperature sensing fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Kunshan Guangxing Electronics Co., Ltd. Assignor: Jianzhun Electric Motor Industry Co., Ltd. Contract fulfillment period: In September 19, 2010, the patent expired Contract record no.: 031000030099 Denomination of utility model: Brushless DC motor with balance plate fixing structure Granted publication date: 20010912 License type: General permission Record date: 2003.5.28 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2010.9.19, EXPIRATION OF PATENT RIGHT Name of requester: KUNSHAN GUANGXING ELECTRONICS CO., LTD. Effective date: 20030528 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Kunshan Guangxing Electronics Co., Ltd. Assignor: Jianzhun Electric Motor Industry Co., Ltd. Contract fulfillment period: September 19, 2010 Contract record no.: 031000030099 Denomination of utility model: Brushless DC motor with balance plate fixing structure Granted publication date: 20010912 License type: General permission Record date: 20030528 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2010.9.19 Name of requester: KUNSHAN GUANGXING ELECTRONICS CO., LTD. Effective date: 20030528 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20100919 Granted publication date: 20010912 |