H02K 23/02
Dc commutator motors or generators having mechanical commutator: characterised by arrangement for
Official title: characterised by arrangement for exciting
H02K23/02 (Dc commutator motors or generators having mechanical commutator: characterised by arrangement for) appears on 506 US grants and 345 published applications in this corpus.
Search patents in H02K- Granted patents
- 506
- Published applications
- 345
- Assignees
- 215
- Inventors
- 857
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 16 | 0 |
| 1979 | 3 | 0 |
| 1980 | 11 | 0 |
| 1981 | 9 | 0 |
| 1982 | 9 | 0 |
| 1983 | 9 | 0 |
| 1984 | 16 | 0 |
| 1985 | 16 | 0 |
| 1986 | 8 | 0 |
| 1987 | 9 | 0 |
| 1988 | 8 | 0 |
| 1989 | 10 | 0 |
| 1990 | 15 | 0 |
| 1991 | 8 | 0 |
| 1992 | 16 | 0 |
| 1993 | 9 | 0 |
| 1994 | 9 | 0 |
| 1995 | 3 | 0 |
| 1996 | 8 | 0 |
| 1997 | 10 | 0 |
| 1998 | 13 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 4 |
| 2002 | 7 | 16 |
| 2003 | 11 | 13 |
| 2004 | 18 | 16 |
| 2005 | 13 | 21 |
| 2006 | 13 | 14 |
| 2007 | 9 | 16 |
| 2008 | 8 | 9 |
| 2009 | 6 | 13 |
| 2010 | 7 | 25 |
| 2011 | 11 | 26 |
| 2012 | 15 | 19 |
| 2013 | 15 | 16 |
| 2014 | 15 | 11 |
| 2015 | 17 | 12 |
| 2016 | 8 | 13 |
| 2017 | 8 | 14 |
| 2018 | 12 | 16 |
| 2019 | 10 | 15 |
| 2020 | 17 | 8 |
| 2021 | 11 | 14 |
| 2022 | 10 | 14 |
| 2023 | 9 | 3 |
| 2024 | 11 | 6 |
| 2025 | 4 | 9 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H02K 23/04Having permanent magnet excitation328
- H02K 23/18Having displaceable main or auxiliary brushes63
- H02K 23/20Having additional brushes spaced intermediately of the main brushes on the commutator29
- H02K 23/08Having series connection of excitation windings19
- H02K 23/24Having commutating-pole windings18
- H02K 23/22Having compensating or damping windings12
- H02K 23/06Having shunt connection of excitation windings11
- H02K 23/10Having compound connection of excitation windings6
All 13 subgroupsShow fewer
- H02K 23/16Having angularly adjustable excitation field6
- H02K 23/023Having short-circuited brushes5
- H02K 23/026Having an unregular distribution of the exciting winding or of the excitation2
- H02K 23/12Having excitation produced by current sources independent of the armature circuit2
- H02K 23/14Having high-speed excitation or de-excitation0
Recent patents
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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
- Compound interaction/induction electric rotating machine107US 4,441,043 A1984
- Method of making permanent magnet assembly70US 4,845,837 AEmerson Electric Co. · 1989
- Permanent magnet field structure for dynamoelectric machines63US 3,979,619 ACanadian General Electric Company Limited · 1976
- Angle grinder61US 7,537,065 B2Black & Decker Inc. · 2009