ClassID:

217582

H02K31/02 - CPC Classification

Classification description:

Acyclic motors or generators, i.e. DC machines having drum or disc armatures with continuous current collectors with solid-contact collectors

Recent Application in this class:
#1
20250385582
2025-12-18

HOMOPOLAR TYPE GENERATORS AND MOTORS

#2
20250379499
2025-12-11

HOMOPOLAR TYPE GENERATORS AND MOTORS

#3
20230067006
2023-03-02

FLAT DC ELECTRIC MACHINE

#4
20230006533
2023-01-05

TURBOFAN JET ENGINE, POWERED BY AN ELECTRIC MOTOR WITH POWER FROM A HIGH EFFICIENCY ELECTRIC GENERATOR

#5
20220329138
2022-10-13

INDUCTION GENERATOR

#6
20220302717
2022-09-22

Systems and methods for battery impedance matching to facilitate improved battery charging

#7
20220209642
2022-06-30

COMPACT HIGH-EFFICIENCY, LOW-REVERSE TORQUE ELECTRIC POWER GENERATOR DRIVEN BY A HIGH EFFICIENCY ELECTRIC DRIVE MOTOR

#8
20220190661
2022-06-16

DC ELECTRIC MOTOR/GENERATOR WITH ENHANCED PERMANENT MAGNET FLUX DENSITIES

#9
20220140716
2022-05-05

AN APPARATUS AND A METHOD FOR PRODUCTION OF ELECTRICAL ENERGY

#10
20210367496
2021-11-25

Homo-polar DC electric generator with positive electromagnetic and positive electro-mechanical feedback

#11
20200280250
2020-09-03

Device and method to generate and apply gravito-magnetic energy

#12
20200244077
2020-07-30

Systems and methods for battery impedance matching to facilitate improved battery charging

#13
20200052570
2020-02-13

Turbofan jet engine, powered by an electric motor with power from a high efficiency electric generator

#14
20190393765
2019-12-26

Compact high-efficiency, low-reverse torque electric power generator driven by a high efficiency electric drive motor

#15
20180331593
2018-11-15

DC electric motor/generator with enhanced permanent magnet flux densities

#16
20180248456
2018-08-30

HOMOPOLAR ENERGY CONVERSION MACHINE

#17
20180183298
2018-06-28

Dual purpose no voltage winding design for bearingless AC homopolar and consequent pole motors and an AC homopolar flywheel energy storage system

#18
20180006539
2018-01-04

Homopolar motor for a flywheel energy storage system

#19
20170365968
2017-12-21

Multi-directional high current slip ring

#20
20170304926
2017-10-26

HOMOPOLOR GENERATOR PULSED WELDING GENERATOR SUBSYSTEMS

#21
20170163053
2017-06-08

Systems and methods for battery impendance matching to facilitate improved battery charging

#22
20160118865
2016-04-28

Systems, methods, and apparatus for a homopolar generator charger with integral rechargeable battery

#23
20150001976
2015-01-01

DC electric motor/generator with enhanced permanent magnet flux densities

#24
20140306568
2014-10-16

Low speed electromagnetic turbine

#25
20140015365
2014-01-16

Electromagnetic High Frequency Homopolar Generator

#26
20130249343
2013-09-26

DC electric motor/generator with enhanced permanent magnet flux densities

#27
20130234653
2013-09-12

Systems, methods, and apparatus for a homopolar generator charger with integral rechargeable battery

#28
20130093401
2013-04-18

Systems, methods, and apparatus for a homopolar generator charger with integral rechargeable battery

#29
20120295450
2012-11-22

Rotary electrical contact device and method for providing current to and/or from a rotating member

#30
20100264771
2010-10-21

Internal impedance converting superconducting acyclic power converter

#31
20100156236
2010-06-24

ROLLER BRUSHES FOR ELECTRICAL MACHINERY,

#32
20080175733
2008-07-24

Embedded fluid mixing device using a homopolar motor

#33
20080100169
2008-05-01

HOMOPOLAR ELECTRICAL GENERATOR

#34
20060158055
2006-07-20

Tangential induction dynamoelectric machines

#35
20060049711
2006-03-09

Homopolar multi-frames (cylinders) generator-motor

#36
20060034149
2006-02-16

Embedded fluid mixing device using a homopolar motor

#37
20050194941
2005-09-08

Method and apparatus for the production of power frequency alternating current directly from the output of a single-pole type generator

#38
20050077796
2005-04-14

System for initiating and maintaining superconductivity in an electrical generator coil

#39
20050077795
2005-04-14

Homopolar machine with improved brush lifetime

#40
20050073206
2005-04-07

Bipolar machine