ZA849128B - Lightweight electric robotic actuator - Google Patents
Lightweight electric robotic actuatorInfo
- Publication number
- ZA849128B ZA849128B ZA849128A ZA849128A ZA849128B ZA 849128 B ZA849128 B ZA 849128B ZA 849128 A ZA849128 A ZA 849128A ZA 849128 A ZA849128 A ZA 849128A ZA 849128 B ZA849128 B ZA 849128B
- Authority
- ZA
- South Africa
- Prior art keywords
- robotic actuator
- lightweight electric
- electric robotic
- lightweight
- actuator
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J21/00—Chambers provided with manipulation devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/10—Programme-controlled manipulators characterised by positioning means for manipulator elements
- B25J9/102—Gears specially adapted therefor, e.g. reduction gears
- B25J9/1025—Harmonic drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J17/00—Joints
- B25J17/02—Wrist joints
- B25J17/0241—One-dimensional joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0004—Braking devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0054—Cooling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/10—Programme-controlled manipulators characterised by positioning means for manipulator elements
- B25J9/12—Programme-controlled manipulators characterised by positioning means for manipulator elements electric
- B25J9/126—Rotary actuators
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
- F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
- F16D55/28—Brakes with only one rotating disc
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
- F16D59/02—Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/225—Detecting coils
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
- H02K7/1021—Magnetically influenced friction brakes
- H02K7/1023—Magnetically influenced friction brakes using electromagnets
- H02K7/1025—Magnetically influenced friction brakes using electromagnets using axial electromagnets with generally annular air gap
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D2055/0004—Parts or details of disc brakes
- F16D2055/0058—Fully lined, i.e. braking surface extending over the entire disc circumference
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
- F16D2121/22—Electric or magnetic using electromagnets for releasing a normally applied brake
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Manipulator (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/563,912 US4577127A (en) | 1983-12-21 | 1983-12-21 | Lightweight electric robotic actuator |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA849128B true ZA849128B (en) | 1985-11-27 |
Family
ID=24252394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA849128A ZA849128B (en) | 1983-12-21 | 1984-11-22 | Lightweight electric robotic actuator |
Country Status (8)
Country | Link |
---|---|
US (1) | US4577127A (es) |
EP (1) | EP0146783B1 (es) |
JP (1) | JPS60156238A (es) |
KR (1) | KR850004413A (es) |
CA (1) | CA1245267A (es) |
DE (1) | DE3479274D1 (es) |
ES (1) | ES8700812A1 (es) |
ZA (1) | ZA849128B (es) |
Families Citing this family (70)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2164317A (en) * | 1984-09-15 | 1986-03-19 | Lamb Sceptre Ltd | Joint for a robotic arm |
US4696378A (en) * | 1985-05-23 | 1987-09-29 | Houton Manufacturing Co., Inc. | Axially compact brake |
EP0209943B1 (de) * | 1985-07-26 | 1992-11-11 | Mavilor Systèmes S.A. | Elektromotor mit Scheibenbremse |
US4678952A (en) * | 1985-08-13 | 1987-07-07 | Intelledex Incorporated | Sealed joint for a robot and the like |
FI76898C (fi) * | 1987-02-19 | 1988-12-12 | Antti Poro | Elektrisk motor. |
FR2624669A1 (fr) * | 1987-12-11 | 1989-06-16 | Banon Louis | Dispositif de detection de position pour moteur electrique |
DE3805705C1 (es) * | 1988-02-24 | 1989-06-22 | Pfaff Haushaltmaschinen Gmbh, 7500 Karlsruhe, De | |
US5018901A (en) * | 1988-07-21 | 1991-05-28 | Space Industries Partnership, L. P. | Ring latched coupler |
US4955250A (en) * | 1989-06-08 | 1990-09-11 | The United States Of America As Represented By The United States Department Of Energy | Multiple forearm robotic elbow configuration |
US5265667A (en) * | 1989-09-14 | 1993-11-30 | Westinghouse Electric Corp. | Robotic arm for servicing nuclear steam generators |
IT219331Z2 (it) * | 1989-11-24 | 1993-02-22 | Scatola morsettiera modulare per applicazione su servomotori elettri- ci per il comando di valvole. | |
FR2681977B1 (fr) * | 1991-09-30 | 1993-12-31 | Framatome | Dispositif de refroidissement adaptable sur un telemanipulateur et son utilisation pour une intervention dans un milieu hostile a temperature elevee. |
US5293107A (en) * | 1993-02-24 | 1994-03-08 | Fanuc Robotics North America, Inc. | Motorized rotary joint and method of constructing a modular robot utilizing same |
WO1996016465A2 (en) * | 1994-11-21 | 1996-05-30 | Stridsberg Innovation Ab | An electric motor layout |
DE19522711C2 (de) * | 1995-06-22 | 1997-07-10 | Gildemeister Ag | Festhaltevorrichtung für die Werkstückspindel einer Drehmaschine |
JP2004518096A (ja) * | 2001-02-08 | 2004-06-17 | エクスラー アクチエンゲゼルシャフト | キャップ状の出力リングを有する波動伝動装置 |
US6806595B2 (en) * | 2001-12-19 | 2004-10-19 | Applied Precision, Llc | Low backlash linear actuator |
CN1515061B (zh) * | 2002-04-01 | 2010-04-28 | 日产自动车株式会社 | 多轴、多层电机的冷却结构 |
SE524549C2 (sv) * | 2002-07-09 | 2004-08-24 | Abb Ab | Anordning vid en industrirobot |
JP2007321879A (ja) * | 2006-06-01 | 2007-12-13 | Harmonic Drive Syst Ind Co Ltd | 回転位置センサ付き減速機ユニット |
GB0616162D0 (en) * | 2006-08-15 | 2006-09-20 | Whiteley Graham | Compact rotary actuator |
DE102007013049A1 (de) | 2007-03-19 | 2008-09-25 | Siemens Ag | Verfahren zum Montieren eines Winkelmessgeräts an einem elektrischen Motor |
DE102007017925A1 (de) * | 2007-04-13 | 2008-10-16 | Isel Automation Gmbh & Co. Kg | Rotationseinheit |
DE102007019753A1 (de) * | 2007-04-20 | 2008-11-27 | Tschakarow, Sawa, Dr. | Elektromechanische Greifeinrichtung |
DE102007029366A1 (de) * | 2007-06-26 | 2009-01-02 | Siemens Ag | Elektrische Maschine mit vereinfachter Drehwinkelgeberausrichtung |
EP2136456B1 (de) | 2008-06-19 | 2012-09-12 | SICK STEGMANN GmbH | Bausatz-Servomotor |
IT1394386B1 (it) * | 2008-09-29 | 2012-06-15 | Scuola Superiore Di Studi Universitari E Di Perfez | Micromotore elettromagnetico passo-passo di tipo wobble |
CN101659057B (zh) * | 2009-09-18 | 2011-01-19 | 哈尔滨工业大学 | 具有力矩保持特性的探月机械臂模块化关节 |
KR101933746B1 (ko) * | 2011-08-11 | 2018-12-28 | 몰 벨팅 시스템즈, 인코포레이티드. | 사이클로 감속기 장치 |
GB201114264D0 (en) | 2011-08-18 | 2011-10-05 | Touch Emas Ltd | Improvements in or relating to prosthetics and orthotics |
KR102179267B1 (ko) | 2011-09-16 | 2020-11-16 | 퍼시몬 테크놀로지스 코포레이션 | 패시브 회전자를 가진 로봇 구동 |
CN102626930B (zh) * | 2012-04-28 | 2014-06-04 | 哈尔滨工业大学 | 具有失电制动与多种感知功能的机械臂模块化关节 |
JP5617900B2 (ja) * | 2012-11-19 | 2014-11-05 | 株式会社安川電機 | ロボット |
GB201302025D0 (en) | 2013-02-05 | 2013-03-20 | Touch Emas Ltd | Improvements in or relating to prosthetics |
US8888374B1 (en) * | 2013-05-08 | 2014-11-18 | Hiwin Technologies Corp. | Bearing with antiskid design |
CN105246656B (zh) * | 2013-05-17 | 2017-11-21 | 株式会社尼康 | 驱动装置和机械手装置 |
US9145919B2 (en) * | 2013-08-14 | 2015-09-29 | Mao-Tu Lee | Speed-reduction transmission bearing |
US10034780B2 (en) | 2014-02-04 | 2018-07-31 | Rehabilitation Institute Of Chicago | Modular and lightweight myoelectric prosthesis components and related methods |
GB201403265D0 (en) | 2014-02-25 | 2014-04-09 | Touch Emas Ltd | Prosthetic digit for use with touchscreen devices |
GB201408253D0 (en) | 2014-05-09 | 2014-06-25 | Touch Emas Ltd | Systems and methods for controlling a prosthetic hand |
DE102014222592A1 (de) * | 2014-09-08 | 2016-03-10 | Sms Group Gmbh | Antrieb einer Maschine, Drehmomentmotor, Kupplungseinrichtung, Vorrichtung zum Bearbeiten von Werkstoffen und Verwendung eines Torquemotors |
GB201417541D0 (en) | 2014-10-03 | 2014-11-19 | Touch Bionics Ltd | Wrist device for a prosthetic limb |
CN105626722B (zh) * | 2014-11-05 | 2018-02-09 | 广明光电股份有限公司 | 机器手臂的刹车装置 |
CN105128029B (zh) * | 2015-09-28 | 2017-02-01 | 哈尔滨工业大学深圳研究生院 | 一种模块化大力矩空间机械臂关节 |
US10415596B2 (en) * | 2016-03-24 | 2019-09-17 | United Technologies Corporation | Electric actuation for variable vanes |
LU93046B1 (de) * | 2016-04-27 | 2017-11-07 | Ovalo Gmbh | Motorisiertes Gelenk für einen programmierbaren Bewegungsautomaten |
LU93045B1 (de) * | 2016-04-27 | 2017-11-07 | Ovalo Gmbh | Motorisiertes Gelenk für einen programmierbaren Bewegungsautomaten |
CN105743276B (zh) * | 2016-04-29 | 2018-08-17 | 杭州通灵自动化股份有限公司 | 一种内置永磁同步电机的少齿差减速机 |
CN106141666B (zh) * | 2016-07-29 | 2018-03-16 | 柳州福能机器人开发有限公司 | 智能护理机器人减速器的加工装配方法 |
US11185426B2 (en) | 2016-09-02 | 2021-11-30 | Touch Bionics Limited | Systems and methods for prosthetic wrist rotation |
EP3506857A1 (en) | 2016-09-02 | 2019-07-10 | Touch Bionics Limited | Systems and methods for prosthetic wrist rotation |
WO2018064709A1 (en) | 2016-10-05 | 2018-04-12 | Robert Darby | Drive unit for robotic manipulators |
IT201600106998A1 (it) * | 2016-10-24 | 2018-04-24 | N P C New Production Concept S R L | Dispositivo di rotazione per un supporto |
US11161258B2 (en) * | 2017-01-16 | 2021-11-02 | Kollmorgen Corporation | Robot arm joint |
DE102017211540A1 (de) * | 2017-07-06 | 2019-01-10 | Siemens Aktiengesellschaft | Getriebemotoreinheit |
CN107825458A (zh) * | 2017-09-13 | 2018-03-23 | 航天科工智能机器人有限责任公司 | 一种一体化关节装置和机械臂 |
KR101956617B1 (ko) | 2017-11-23 | 2019-03-12 | (주)한국미래기술 | 병렬형 집적 구동장치 |
KR101983563B1 (ko) | 2017-11-23 | 2019-05-29 | (주)한국미래기술 | 병렬형 집적 구동장치 |
US10973660B2 (en) | 2017-12-15 | 2021-04-13 | Touch Bionics Limited | Powered prosthetic thumb |
CN108406843B (zh) * | 2018-05-29 | 2021-01-26 | 安徽工程大学 | 一种机械关节的连接结构 |
US10916993B2 (en) * | 2018-06-14 | 2021-02-09 | Raytheon Company | Method for heat transfer across rotary joint |
CN110962158B (zh) * | 2018-09-28 | 2021-09-17 | 台达电子工业股份有限公司 | 机器人的散热系统 |
CN111283657B (zh) * | 2018-12-06 | 2021-12-24 | 台达电子工业股份有限公司 | 机器人机构 |
DE112019007743T5 (de) | 2019-09-25 | 2022-08-04 | Yamaha Hatsudoki Kabushiki Kaisha | Vertikaler Knickarmroboter, einachsiger Roboter und Motoreinheit |
GB2588787A (en) * | 2019-11-06 | 2021-05-12 | Safran Electrical & Power | Static brake assembly |
GB2588786A (en) * | 2019-11-06 | 2021-05-12 | Safran Electrical & Power | Static brake assembly |
US11931270B2 (en) | 2019-11-15 | 2024-03-19 | Touch Bionics Limited | Prosthetic digit actuator |
DE102020100271A1 (de) * | 2020-01-09 | 2021-07-15 | Bayerische Motoren Werke Aktiengesellschaft | Rotorlagesensor und Motorbaugruppe |
CN111409097B (zh) * | 2020-04-01 | 2022-08-19 | 燕山大学 | 一种机器人用紧凑型关节驱动装置 |
CN111496838B (zh) * | 2020-04-30 | 2022-06-07 | 北京理工大学 | 主动散热关节及包含该散热关节的仿生机器人 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2126563A5 (es) * | 1971-02-10 | 1972-10-06 | Samm | |
US4266152A (en) * | 1979-03-29 | 1981-05-05 | The Singer Company | Method of and apparatus for cooling electric motors and totally enclosed electric motors incorporating same |
FR2465351A3 (fr) * | 1979-09-07 | 1981-03-20 | Leroy Somer Moteurs | Moteur electrique immergeable ventile pour groupe moto-pompe |
DE2939160C3 (de) * | 1979-09-27 | 1982-03-18 | Siemens AG, 1000 Berlin und 8000 München | Einrichtung mit einem Resolver für Radarantennen |
IT7923154V0 (it) * | 1979-11-16 | 1979-11-16 | Setti Luciano | Freno elettromagnetico perfezionato, per motori autofrenanti, provvisto di regolazione manuale del gioco fra platorello frenante ed ancora. |
JPH0119584Y2 (es) * | 1980-05-09 | 1989-06-06 | ||
FR2482378A1 (fr) * | 1980-05-09 | 1981-11-13 | Lorette Manufacture Vilebrequi | Rotor avec dispositif de refroidissement notamment du collecteur pour moteurs electriques, son procede et ses moyens de realisation |
JPS58165644A (ja) * | 1982-03-26 | 1983-09-30 | Okuma Mach Works Ltd | 位置検出器付きモ−タ |
US4398110A (en) * | 1982-05-05 | 1983-08-09 | Westinghouse Electric Corp. | Harmonic electric actuator |
-
1983
- 1983-12-21 US US06/563,912 patent/US4577127A/en not_active Expired - Lifetime
-
1984
- 1984-11-20 DE DE8484113998T patent/DE3479274D1/de not_active Expired
- 1984-11-20 EP EP84113998A patent/EP0146783B1/en not_active Expired
- 1984-11-22 ZA ZA849128A patent/ZA849128B/xx unknown
- 1984-12-11 CA CA000469803A patent/CA1245267A/en not_active Expired
- 1984-12-19 ES ES538839A patent/ES8700812A1/es not_active Expired
- 1984-12-19 JP JP59266541A patent/JPS60156238A/ja active Granted
- 1984-12-21 KR KR1019840008210A patent/KR850004413A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
JPH0235546B2 (es) | 1990-08-10 |
DE3479274D1 (en) | 1989-09-07 |
EP0146783B1 (en) | 1989-08-02 |
CA1245267A (en) | 1988-11-22 |
ES538839A0 (es) | 1986-10-16 |
KR850004413A (ko) | 1985-07-15 |
US4577127A (en) | 1986-03-18 |
ES8700812A1 (es) | 1986-10-16 |
EP0146783A2 (en) | 1985-07-03 |
EP0146783A3 (en) | 1985-12-04 |
JPS60156238A (ja) | 1985-08-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3479274D1 (en) | Improved lightweight electric robotic actuator | |
DE3470086D1 (en) | Electric actuators | |
DE3467221D1 (en) | Electric actuators | |
DE3472708D1 (en) | Electric actuators | |
DE3467220D1 (en) | Electric actuators | |
DE3467222D1 (en) | Electric actuators | |
DE3473014D1 (en) | Electric actuators | |
DE3364648D1 (en) | Electric actuator | |
DE3468361D1 (en) | Actuator | |
GB8430200D0 (en) | Manipulator robot | |
GB2134210B (en) | An actuator | |
GB8319708D0 (en) | Assembly robots | |
GB8313102D0 (en) | Electric actuator | |
ZA843416B (en) | Electric actuators | |
AU558094B2 (en) | Electric actuators | |
AU557841B2 (en) | Electric actuators | |
AU559873B2 (en) | Electric actuators |