Patents
Patents for H02K 41 - Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path (10,066)
09/1989
09/06/1989EP0331463A1 Improvements in electric machines
09/05/1989US4864170 Linear motor
09/05/1989US4864169 Polyphase variable reluctance motor
09/05/1989US4863240 Apparatus for actuating objective lens
08/1989
08/29/1989US4860430 Completing a linear motor stator
08/22/1989US4860183 Planar linear pulse motor
08/22/1989US4859974 Electromagnetic motor/actuator
08/22/1989US4859885 Winding for linear pump
08/22/1989US4858452 Automobile power door lock
08/16/1989EP0327538A1 Fluid circulated linear motor for robotic systems
08/15/1989US4857786 Structure of stepping motor and method of driving the stepping motor
08/15/1989US4857782 Step motor
08/15/1989US4857781 High-speed non-contact linear motor with magnetic levitation
08/02/1989EP0326374A2 A moving coil linear motor
08/02/1989CN2042255U Special planar linear motor
08/01/1989US4853808 Linear actuator for disc drive
07/1989
07/26/1989CN1034284A Disk drive having improved linear actuator
07/18/1989US4849664 Linear motor car system
07/18/1989US4848242 Linear induction propelled track guided runner
07/04/1989US4845699 Electric mechanical transducer and optical type pickup apparatus driven by a magnetic field
07/04/1989CA1256993A1 Device for translating a slide and electrodynamic apparatus comprising said device
06/1989
06/13/1989US4839545 Cooling system for linear motor
06/13/1989US4839544 Apparatus for driving a curtain
06/13/1989US4839543 Linear motor
06/13/1989US4838146 Fluid pressure actuator with anti-rotation slide attached to piston rod
06/13/1989CA1255764A1 Reaction rail for linear induction motor
06/07/1989EP0319096A2 Linear motor with angularly indexed magnetic poles
06/07/1989EP0318484A1 System for using synchronous secondaries of a linear motor to biaxially draw plastic films.
06/06/1989US4837470 Magnetically driven nutating motor
06/06/1989US4837467 Linear motor with angularly indexed magnetic poles
05/1989
05/31/1989EP0317787A1 Device for carrying out the readying movement of a work piece towards a work station
05/30/1989US4835429 Flexible printed cable connected to an inner most end of motor coil
05/30/1989US4835424 Platen laminated in mutually perpendicular direction for use with linear motors and the like
05/30/1989US4834353 Linear motor with magnetic bearing preload
05/24/1989CN2038299U Explosion-proof cylindrical d.c. generator
05/23/1989US4833351 Muliple axis actuator
05/16/1989US4831291 Differentially wound electromagnetic actuator
05/16/1989US4831290 Linear unit for handling equipment
05/10/1989EP0314899A2 Method and apparatus for introducing a winding into the inductor of a linear motor
05/02/1989US4827164 Magnetically assisted stepping motor
05/02/1989US4827162 Controlled drag for magnet actuator
05/02/1989US4825984 Visco-elastic couple for magnet actuator
05/02/1989CA1253559A1 Bi-axial supporting arrangement
04/1989
04/25/1989US4825111 Linear motor propulsion system
04/11/1989US4819564 Linear motor driven conveying installation and braking device therefor
04/04/1989US4817930 Guiding device
03/1989
03/29/1989CN2035156U Lamination type tubular straight-line induction motor
03/28/1989US4815949 In-well submersible motor with stacked component stator
03/15/1989CN1031782A Non-contacting linear drive
03/14/1989US4813033 Two axis electromagnetic actuator with axis balanced suspension
03/14/1989US4812934 Actuator for memory storage device
03/14/1989US4812795 Electromagnetic devices having selectively movable core winding
03/14/1989CA1251029A1 Method of manufacturing electromagnetic members
03/09/1989WO1989002184A1 Contact-free linear drive
03/08/1989EP0305685A1 Linear drive without contact
03/08/1989EP0305474A1 Voice coil linear actuator.
03/07/1989US4811320 Optical type pickup apparatus with lens holder supported by frame wires each having an end inserted into a frame hole
03/07/1989US4810914 Linear actuator with multiple closed loop flux paths essentially orthogonal to its axis
03/07/1989CA1250913A1 Driving system for linear vehicles
02/1989
02/28/1989US4808892 Bi-directional drive motor system
02/23/1989WO1989001725A1 Apparatus for producing controlled movement
02/07/1989US4803388 Linear motor
02/07/1989US4803387 Linear belt motor
02/02/1989EP0266397A4 High speed precision drilling system.
02/01/1989EP0301164A2 Electrical drive or generator
01/1989
01/31/1989US4801829 Electromagnetic motor without mechanical motion converter
01/31/1989US4800818 Linear motor-driven conveyor means
01/25/1989EP0300126A1 Vehicle with internal combustion motor, generator and electrical drive motor
01/25/1989EP0300125A1 Electrical drive or generator
01/25/1989EP0300124A1 Electrical drive or generator
01/25/1989EP0300123A1 Electrical drive or generator
01/18/1989EP0299137A1 Electrical drive or generator
01/17/1989US4798985 Linear motor with air-lift bearing unloading
01/11/1989EP0298194A2 Electrical drive
01/04/1989EP0297552A2 Composite structures and methods of manufacturing the same
01/04/1989EP0297532A1 Linear pulse motor
01/03/1989US4795928 Linear actuator assembly for accessing a magnetic memory disc
12/1988
12/29/1988WO1988010188A1 System for using synchronous secondaries of a linear motor to biaxially draw plastic films
12/27/1988US4794293 Direct current electric motor
12/27/1988US4794287 Linear motor
12/27/1988US4794286 Variable reluctance stepper motor
12/27/1988US4794284 Linear D.C. motor with non-ferrous stator core
12/20/1988US4792935 Objective lens driving device with multipole magnet
12/20/1988US4792707 Disk tracking device
12/20/1988CA1247184A1 Heteropolar magnet
12/14/1988EP0294541A1 Electrical drive or generator
12/13/1988US4790628 Apparatus for actuating objective lens
12/06/1988US4789815 Linear motor
12/06/1988CA1246214A1 Moving magnet disc drive actuator
11/1988
11/29/1988US4788477 Linear motor-driven X-Y table
11/23/1988EP0291638A2 Linear actuator
11/22/1988US4786832 Supporting mechanism for a movable member of linear pulse motors
11/17/1988EP0291119A1 Guiding device
11/15/1988US4785210 Linear motor
11/15/1988US4785138 Electric cable for use as phase winding for linear motors
11/02/1988CN88102802A Self-levitating type dc linear motor
10/1988
10/19/1988CN88201010U Dc reciprocating linear motor
10/12/1988CN87205348U Cylindrical linear motor with insulated spacing collars
10/04/1988US4775908 Moving magnet actuator
09/1988
09/27/1988US4774447 Linear motor-driven table apparatus capable of operating both in fine-feed and large-feed modes
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