CN109058361A - 磁性动态阻尼组件 - Google Patents
磁性动态阻尼组件 Download PDFInfo
- Publication number
- CN109058361A CN109058361A CN201810908668.4A CN201810908668A CN109058361A CN 109058361 A CN109058361 A CN 109058361A CN 201810908668 A CN201810908668 A CN 201810908668A CN 109058361 A CN109058361 A CN 109058361A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- diaphragm
- actuation element
- dynamic antivibration
- component according
- 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.)
- Granted
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 178
- 239000013013 elastic material Substances 0.000 claims abstract description 4
- 238000013016 damping Methods 0.000 claims description 25
- 239000012530 fluid Substances 0.000 claims description 15
- 238000005452 bending Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000005389 magnetism Effects 0.000 claims 22
- 238000002955 isolation Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- FQMNUIZEFUVPNU-UHFFFAOYSA-N cobalt iron Chemical compound [Fe].[Co].[Co] FQMNUIZEFUVPNU-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
- F16F13/10—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper the wall being at least in part formed by a flexible membrane or the like
- F16F13/105—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper the wall being at least in part formed by a flexible membrane or the like characterised by features of partitions between two working chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/26—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions
- F16F13/266—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions comprising means for acting dynamically on the walls bounding a passage between working and equilibration chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
- B60K5/12—Arrangement of engine supports
- B60K5/1283—Adjustable supports, e.g. the mounting or the characteristics being adjustable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
- F16F13/10—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper the wall being at least in part formed by a flexible membrane or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/26—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions
- F16F13/264—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions comprising means for acting dynamically on the walls bounding a working chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/26—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions
- F16F13/30—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions comprising means for varying fluid viscosity, e.g. of magnetic or electrorheological fluids
- F16F13/305—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions comprising means for varying fluid viscosity, e.g. of magnetic or electrorheological fluids magnetorheological
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/06—Magnetic or electromagnetic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
- F16F2224/045—Fluids magnetorheological
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Combined Devices Of Dampers And Springs (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
Claims (20)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201762556924P | 2017-09-11 | 2017-09-11 | |
US62/556,924 | 2017-09-11 | ||
US16/046,801 US10690217B2 (en) | 2017-09-11 | 2018-07-26 | Magnetically dynamic damping assembly |
US16/046,801 | 2018-07-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN109058361A true CN109058361A (zh) | 2018-12-21 |
CN109058361B CN109058361B (zh) | 2021-01-01 |
Family
ID=63556182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201810908668.4A Active CN109058361B (zh) | 2017-09-11 | 2018-08-10 | 磁性动态阻尼组件 |
Country Status (4)
Country | Link |
---|---|
US (1) | US10690217B2 (zh) |
EP (1) | EP3456995B1 (zh) |
JP (1) | JP6636588B2 (zh) |
CN (1) | CN109058361B (zh) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10598248B2 (en) * | 2017-11-01 | 2020-03-24 | Simon Fraser University | Smart fluid damper |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5249782A (en) * | 1991-12-06 | 1993-10-05 | Tokai Rubber Industries, Ltd. | Elastic mount and method of manufacturing the elastic mount |
JPH0791484A (ja) * | 1993-09-21 | 1995-04-04 | Toyoda Gosei Co Ltd | 流体封入式防振装置 |
US6032937A (en) * | 1996-12-27 | 2000-03-07 | Bridgestone Corporation | Vibration isolating apparatus |
US6254069B1 (en) * | 1997-12-05 | 2001-07-03 | Tokai Rubber Industries, Ltd. | Active vibration damping system having controller for generating pulse signal for oscillation of oscillating plate partially defining fluid chambers |
US6406010B1 (en) * | 1999-02-05 | 2002-06-18 | Tokai Rubber Industries, Ltd. | Fluid-filled active vibration damping device |
US20080296819A1 (en) * | 2004-09-02 | 2008-12-04 | Avon Vibration Management Systems Limited | Controlling vibrations |
CN103322105A (zh) * | 2013-07-02 | 2013-09-25 | 山东大学 | 一种仿生空气弹簧系统 |
JP2014521029A (ja) * | 2011-07-12 | 2014-08-25 | ベイジンウェスト・インダストリーズ・カンパニー・リミテッド | レートディップトラック通路を備える磁性流体型マウント装置 |
Family Cites Families (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3314335A1 (de) * | 1983-04-20 | 1984-10-31 | Tillmann 6108 Weiterstadt Freudenberg | Motorlager |
DE3918753C1 (zh) * | 1989-06-08 | 1990-07-12 | Fa. Carl Freudenberg, 6940 Weinheim, De | |
JP2924317B2 (ja) | 1991-06-18 | 1999-07-26 | 東海ゴム工業株式会社 | 流体封入式マウント装置 |
JPH05164180A (ja) | 1991-12-06 | 1993-06-29 | Tokai Rubber Ind Ltd | 流体封入式防振装置 |
JP3016060B2 (ja) * | 1993-04-28 | 2000-03-06 | 本田技研工業株式会社 | 防振マウント装置 |
JP3304554B2 (ja) | 1993-09-21 | 2002-07-22 | 豊田合成株式会社 | 液体封入式防振装置 |
JPH07158690A (ja) | 1993-12-09 | 1995-06-20 | Toyoda Gosei Co Ltd | 液体封入式防振装置 |
JPH10238584A (ja) | 1997-02-27 | 1998-09-08 | Bridgestone Corp | 防振装置 |
JP3564597B2 (ja) | 1997-03-31 | 2004-09-15 | 東洋ゴム工業株式会社 | 液体封入式防振装置 |
JP2000310273A (ja) * | 1999-04-23 | 2000-11-07 | Tokai Rubber Ind Ltd | 電磁式能動型防振装置 |
JP3811469B2 (ja) * | 2003-06-13 | 2006-08-23 | 本田技研工業株式会社 | 能動型防振支持装置のアクチュエータ駆動制御装置 |
JP4980808B2 (ja) * | 2007-07-06 | 2012-07-18 | 株式会社ケーヒン | 能動型防振支持装置 |
US8172209B2 (en) * | 2007-09-21 | 2012-05-08 | Tokai Rubber Industries, Ltd. | Fluid filled type vibration damping device |
CN102245927B (zh) * | 2008-12-18 | 2014-03-19 | 东海橡塑工业株式会社 | 流体封入式隔振装置 |
JP5438756B2 (ja) * | 2009-03-30 | 2014-03-12 | 本田技研工業株式会社 | 能動型防振支持装置 |
JP5226599B2 (ja) | 2009-04-27 | 2013-07-03 | 株式会社ブリヂストン | 防振装置 |
JP5530660B2 (ja) * | 2009-05-29 | 2014-06-25 | 東海ゴム工業株式会社 | 流体封入式能動型防振装置とその製造方法 |
DE112010002858T5 (de) * | 2009-07-08 | 2013-01-03 | Honda Motor Co., Ltd. | Aktive Anti-Vibrations-Stützeinrichtung und Anti-Vibrations-Steuerverfahren dafür |
WO2011070744A1 (ja) * | 2009-12-09 | 2011-06-16 | 東海ゴム工業株式会社 | 電磁式アクチュエータとそれを用いた流体封入式能動型防振装置 |
DE102010060885A1 (de) | 2010-08-26 | 2012-03-01 | Contitech Vibration Control Gmbh | Motorlager für ein Kraftfahrzeug |
CN101936360A (zh) | 2010-09-07 | 2011-01-05 | 吉林大学 | 汽车动力总成半主动控制磁流变液压悬置 |
JP5719704B2 (ja) * | 2011-06-30 | 2015-05-20 | 住友理工株式会社 | 流体封入式能動型防振装置 |
EP2732182B1 (en) * | 2011-07-12 | 2017-04-19 | BeijingWest Industries Co. Ltd. | A hydraulic mount apparatus for supporting vibration source |
DE102011112130A1 (de) | 2011-09-01 | 2013-03-07 | Audi Ag | Luftfedervorrichtung für ein Kraftfahrzeug |
DE102012103358A1 (de) | 2012-04-18 | 2013-10-24 | Contitech Luftfedersysteme Gmbh | Abrollkolben für einen Luftfederrollbalg |
PL2820321T3 (pl) | 2012-08-15 | 2017-09-29 | Beijingwest Industries Co. Ltd. | Zespół mocujący |
KR101462911B1 (ko) * | 2013-03-19 | 2014-11-19 | 현대자동차주식회사 | 양방향 제어 가능한 전자식 액티브 마운트 |
CN106385158B (zh) | 2016-09-28 | 2018-11-30 | 北京理工大学 | 一种液冷式音圈电机主动悬架 |
US10899215B2 (en) * | 2017-09-11 | 2021-01-26 | Beijingwest Industries Co., Ltd. | Hydraulic mount apparatus |
-
2018
- 2018-07-26 US US16/046,801 patent/US10690217B2/en active Active
- 2018-08-10 CN CN201810908668.4A patent/CN109058361B/zh active Active
- 2018-09-10 EP EP18193392.0A patent/EP3456995B1/en active Active
- 2018-09-10 JP JP2018168604A patent/JP6636588B2/ja active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5249782A (en) * | 1991-12-06 | 1993-10-05 | Tokai Rubber Industries, Ltd. | Elastic mount and method of manufacturing the elastic mount |
JPH0791484A (ja) * | 1993-09-21 | 1995-04-04 | Toyoda Gosei Co Ltd | 流体封入式防振装置 |
US6032937A (en) * | 1996-12-27 | 2000-03-07 | Bridgestone Corporation | Vibration isolating apparatus |
US6254069B1 (en) * | 1997-12-05 | 2001-07-03 | Tokai Rubber Industries, Ltd. | Active vibration damping system having controller for generating pulse signal for oscillation of oscillating plate partially defining fluid chambers |
US6406010B1 (en) * | 1999-02-05 | 2002-06-18 | Tokai Rubber Industries, Ltd. | Fluid-filled active vibration damping device |
US20080296819A1 (en) * | 2004-09-02 | 2008-12-04 | Avon Vibration Management Systems Limited | Controlling vibrations |
JP2014521029A (ja) * | 2011-07-12 | 2014-08-25 | ベイジンウェスト・インダストリーズ・カンパニー・リミテッド | レートディップトラック通路を備える磁性流体型マウント装置 |
CN103322105A (zh) * | 2013-07-02 | 2013-09-25 | 山东大学 | 一种仿生空气弹簧系统 |
Also Published As
Publication number | Publication date |
---|---|
US10690217B2 (en) | 2020-06-23 |
CN109058361B (zh) | 2021-01-01 |
JP6636588B2 (ja) | 2020-01-29 |
EP3456995B1 (en) | 2020-11-11 |
US20190078642A1 (en) | 2019-03-14 |
JP2019049355A (ja) | 2019-03-28 |
EP3456995A1 (en) | 2019-03-20 |
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GR01 | Patent grant | ||
GR01 | Patent grant | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Magnetic dynamic damping component Effective date of registration: 20230517 Granted publication date: 20210101 Pledgee: Jingxi Zhixing Zhangjiakou Automotive Electronics Co.,Ltd. Pledgor: BEIJINGWEST INDUSTRIES Co.,Ltd. Registration number: Y2023990000256 |
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PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20210101 Pledgee: Jingxi Zhixing Zhangjiakou Automotive Electronics Co.,Ltd. Pledgor: BEIJINGWEST INDUSTRIES Co.,Ltd. Registration number: Y2023990000256 |
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PC01 | Cancellation of the registration of the contract for pledge of patent right |