H02K 23/00
Dc commutator motors or generators having mechanical commutator
Official title: DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
H02K23/00 (Dc commutator motors or generators having mechanical commutator) appears on 1,382 US grants and 923 published applications in this corpus.
Search patents in H02K- Granted patents
- 1,382
- Published applications
- 923
- Assignees
- 514
- Inventors
- 2,258
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 13 | 0 |
| 1978 | 30 | 0 |
| 1979 | 9 | 0 |
| 1980 | 22 | 0 |
| 1981 | 17 | 0 |
| 1982 | 29 | 0 |
| 1983 | 23 | 0 |
| 1984 | 27 | 0 |
| 1985 | 28 | 0 |
| 1986 | 28 | 0 |
| 1987 | 29 | 0 |
| 1988 | 13 | 0 |
| 1989 | 25 | 0 |
| 1990 | 26 | 0 |
| 1991 | 25 | 0 |
| 1992 | 36 | 0 |
| 1993 | 25 | 0 |
| 1994 | 27 | 0 |
| 1995 | 10 | 0 |
| 1996 | 21 | 0 |
| 1997 | 22 | 0 |
| 1998 | 27 | 0 |
| 1999 | 30 | 0 |
| 2000 | 39 | 0 |
| 2001 | 26 | 20 |
| 2002 | 35 | 47 |
| 2003 | 39 | 37 |
| 2004 | 56 | 49 |
| 2005 | 39 | 50 |
| 2006 | 35 | 40 |
| 2007 | 29 | 51 |
| 2008 | 19 | 33 |
| 2009 | 29 | 43 |
| 2010 | 36 | 54 |
| 2011 | 24 | 60 |
| 2012 | 38 | 48 |
| 2013 | 31 | 42 |
| 2014 | 37 | 34 |
| 2015 | 41 | 31 |
| 2016 | 26 | 36 |
| 2017 | 34 | 43 |
| 2018 | 29 | 44 |
| 2019 | 38 | 39 |
| 2020 | 34 | 17 |
| 2021 | 35 | 23 |
| 2022 | 21 | 28 |
| 2023 | 15 | 17 |
| 2024 | 24 | 16 |
| 2025 | 13 | 14 |
| 2026 | 6 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H02K 23/02Dc commutator motors or generators having mechanical commutator: characterised by arrangement for506
- H02K 23/26Dc commutator motors or generators having mechanical commutator: characterised by the armature331
- H02K 23/66Structural association with auxiliary electric devices influencing the characteristic of, or controlling306
- H02K 23/40Dc commutator motors or generators having mechanical commutator: characterised by the arrangement122
- H02K 23/54Disc armature motors or generators118
- H02K 23/62Motors or generators with stationary armatures and rotating excitation field50
- H02K 23/56Motors or generators having iron cores separated from armature winding46
- H02K 23/58Motors or generators without iron cores36
All 13 subgroupsShow fewer
- H02K 23/60Motors or generators having rotating armatures and rotating excitation field20
- H02K 23/52Motors acting also as generators19
- H02K 23/64Motors specially adapted for running on dc or ac by choice16
- H02K 23/68Structural association with auxiliary mechanical devices11
- H02K 23/50Generators with two or more outputs2
Recent patents
- System and method for delivering electric power22 Sep 2026US 12,744,406 B2
- System and method for delivering electric power11 Aug 2026US 12,706,485 B2
- Axial flux actuators using printed circuit board armatures4 Aug 2026US 12,700,771 B1E-Circuit Motors, Inc.
- Constant micro power energy system (CMPES) device16 Jun 2026US 12,658,762 B2
- Fixing structure of choke coil and motor24 Feb 2026US 12,562,627 B2Mabuchi Motor Co., Ltd.
- Electromechanical transduction for energy storage compliant mechanisms8 Oct 2026US 2026/0312462 A1Brigham Young University
- Electromagnetic transducer with dual flux20 Aug 2026US 2026/0243733 A1Cochlear Limited
- Coreless motor30 Jul 2026US 2026/0221832 A1Citizen Micro Co., Ltd.
- Magnetic memory drive21 May 2026US 2026/0142541 A1
- Four-phase direct current motor and generator30 Apr 2026US 2026/0121463 A1Force Equals Mass Times Acceleration, Inc.
Most cited
By later US patents
- DC motor with dual commutator bar set and selectable series and parallel connected coils1,444US 7,893,586 B2Black & Decker Inc. · 2011
- Methods and apparatus for increasing power of permanent magnet motors1,432US 6,777,838 B22004
- Actuator with opposing repulsive magnetic forces146US 6,002,184 ACoactive Drive Corporation · 1999
- Actuator with repulsive magnetic forces144US 6,307,285 B1Coactive Drive Corporation · 2001
- Electric tool, particularly a handtool, with torque control138US 4,487,270 ABlack & Decker Inc. · 1984