Patents
Patents for H02K 23 - Dc commutator motors or generators having mechanical commutator; Universal ac/dc commutator motors (6,220)
06/1988
06/23/1988DE3741919A1 DC permanent-magnet motor having armature reaction and brush displacement with respect to the armature rotation direction
06/22/1988EP0271714A2 Electric motor with a commutation device to reverse the rotation
06/21/1988CA1238357A1 Switch limit assembly
06/16/1988WO1988004490A1 Armature of an electric motor
05/1988
05/31/1988US4748362 D. C. motor with multi-tooth poles
05/31/1988US4748358 Electric starter motor with holder for permanent magnets
05/31/1988US4748353 Hand tool for clockwise and counterclockwise rotations
05/31/1988CA1237461A1 Direct current machine
05/25/1988CN86107654A Electric and magnetic mixed excitation system
05/24/1988USRE32674 Multiple windings electrical machines
05/11/1988EP0266672A2 Permanent-magnet series motor
05/11/1988DE3720862A1 Series-wound permanent magnet motor
05/10/1988US4743817 Electromagnetic servo unit
05/04/1988EP0265425A1 Commutator machine
04/1988
04/27/1988EP0265364A1 Permanent magnet assembly and method of making same
04/27/1988EP0265279A2 Flat motor device, method and apparatus for producing the same
04/21/1988DE3634214A1 Drive motor for an apparatus
04/07/1988DE3632014A1 Electrical machine, especially an electric motor
04/06/1988EP0262773A1 Solderless connection for an electric motor
04/06/1988CN87212031U Excitation unit of electro-hydraulic valve motor
03/1988
03/30/1988CN87105601A Electric machines
03/30/1988CN86106317A D.c. motor with series windings
03/29/1988US4734607 Miniature motor with spark quenching connection between commutator and brushes
03/17/1988DE3620397A1 Electrical machine, especially a small DC motor
03/16/1988EP0260040A1 Suppression in electric motors
03/16/1988CN87106152A Electric motor with velocity indicating device
03/10/1988WO1988001802A1 Electrical machine, in particular electric motor
03/09/1988EP0259025A2 Electric motor with velocity indicating device
03/09/1988EP0258677A1 Carrier plate for installing in an electric motor
03/09/1988CN87106158A Suppression in electric motors
03/02/1988CN87104301A Axial fan type permanent magnet motor
03/01/1988US4728835 Electric motors
02/1988
02/24/1988CN86201920U Improved starter
02/23/1988US4727273 Permanent magnet type electric motor
02/10/1988EP0255736A1 Automatic tool exchange apparatus
02/03/1988EP0255222A1 Electric motor with commutator oil protection
02/03/1988CN85108196B Arrangements for controlling d.c. motors
01/1988
01/27/1988EP0254347A1 Electric machine
01/19/1988US4720650 Motor
01/13/1988EP0252481A2 Electric motor system for automobiles
01/13/1988CN87104514A Micromotor
01/12/1988US4719382 Direct-current motor
01/07/1988EP0251350A2 Electric motor
01/07/1988EP0250839A1 Rotor for a direct-current machine
01/06/1988CN85109553A Combined magnetic full force push-pull kinetic energy increasing direct-current motor
12/1987
12/30/1987CN87104337A Electric motor
12/30/1987CN87104183A Miniature motor fitted with speed governor
12/29/1987US4716330 DC motor with commutator rotor
12/29/1987US4716329 Armature construction for eliminating armature reaction in electric rotating machines
12/29/1987US4715732 Bearing assemblies for motors
12/08/1987US4712034 Multiple ring armature core for direct current motor
12/03/1987WO1987007452A1 Stator for an electrical machine
12/03/1987DE3716625A1 Permanent-magnet-energised (excited) electric motor
12/02/1987EP0247495A2 Electrical apparatus for personal use
12/01/1987US4710667 Brushless D.C. dynamoelectric machine with decreased magnitude of pulsations of air gap flux
11/1987
11/24/1987US4707910 Method of assembling electric motors
11/19/1987EP0245749A2 Permanent magnet excited D.C. motor
11/17/1987US4707630 Magnetic cover member for magnetic poles of DC motor
11/17/1987US4706512 For a motor vehicle
11/11/1987EP0025058B1 Multiple windings electrical machines
11/11/1987CN87103248A Miniature motor
11/05/1987DE3712652A1 Armature winding for commutator motors and generators having a plurality of pole pairs
11/04/1987CN87206312U General model electric motor for step and dc motor
10/1987
10/28/1987CN87102756A Shallow cup-shaped miniature motor
10/27/1987US4703210 Miniature electric non-uniform magnetization rotating machine
10/20/1987US4701655 D.C. machine, with mechanical and electrical connections among collector segments
09/1987
09/30/1987CN86108648A Lightweight high power electromagnetic transducer
09/23/1987EP0238249A2 An electric motor
09/23/1987EP0237935A2 Permanent magnet field DC machine
09/15/1987US4694211 In a motor vehicle
09/09/1987EP0236239A1 Electric starter with an epicycloidalic reduction gear
09/09/1987EP0235735A1 Portable electric tool
09/09/1987EP0235443A1 Improvements in or relating to electric motors and components therefor
09/08/1987US4691746 Flat windings, coil forms, and winding method
09/03/1987DE3606275A1 Electrical machine
08/1987
08/20/1987DE3604675A1 Drive motor for an apparatus (appliance)
08/19/1987EP0232834A1 Multipole direct current motor
08/19/1987EP0232402A1 D.c. electric motor.
08/18/1987US4687608 Composite permanent magnet for magnetic excitation and method of producing the same
08/12/1987CN87100198A Miniature motor
08/05/1987EP0230759A1 Electrical machines
08/05/1987EP0230639A2 Lightweight high power electromagnetic transducer
08/04/1987US4684839 Structure of electric motor and production method thereof
08/04/1987US4684774 Electrical contacts for a switch
08/04/1987CA1225114A1 Interpole assembly for a dc machine
07/1987
07/28/1987US4683388 Compound induction electric rotating machine
07/28/1987US4682410 Process of making a dynamo electric machine
07/21/1987US4682066 Alignment system for permanent magnet motors
07/14/1987CA1224235A1 Brushless d.c. dynamoelectric machine having ferrite material magnetic circuit
07/01/1987EP0227558A1 Electric starter with a flux converter for an internal-combustion engine
06/1987
06/30/1987US4677335 Axial gap type coreless electric motor with noise reduction
06/30/1987US4677334 Flat coil dynamoelectric device with encapsulated preform
06/30/1987US4677332 Electric motor having auxiliary portions distributed at a pitch which is an odd number sub-multiple of the pitch of active portions
06/30/1987US4677330 Miniature motor with frangible magnet retaining boss
06/30/1987US4677329 Sub-assembly for electric motor with stator terminal connection means
06/24/1987EP0226356A1 Electric motor with ironless armature
06/24/1987EP0226331A1 Alignment system for permanent magnet motors
06/24/1987CN85109220A D.c. electric machine with annular magnetic field and disk rotor
06/24/1987CN85106290A D.c. motor having permanent magnetic field system
06/23/1987US4675566 Method of adjusting motor performance
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