H02K 21/22
With magnets rotating around the armatures
Official title: with magnets rotating around the armatures, e.g. flywheel magnetos
H02K21/22 (With magnets rotating around the armatures) appears on 1,435 US grants and 1,638 published applications in this corpus.
Search patents in H02K- Granted patents
- 1,435
- Published applications
- 1,638
- Assignees
- 615
- Inventors
- 3,023
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 5 | 0 |
| 1989 | 11 | 0 |
| 1990 | 11 | 0 |
| 1991 | 14 | 0 |
| 1992 | 13 | 0 |
| 1993 | 16 | 0 |
| 1994 | 19 | 0 |
| 1995 | 15 | 0 |
| 1996 | 17 | 0 |
| 1997 | 20 | 0 |
| 1998 | 34 | 0 |
| 1999 | 19 | 0 |
| 2000 | 18 | 0 |
| 2001 | 18 | 7 |
| 2002 | 21 | 28 |
| 2003 | 17 | 22 |
| 2004 | 32 | 37 |
| 2005 | 26 | 37 |
| 2006 | 32 | 47 |
| 2007 | 16 | 32 |
| 2008 | 27 | 40 |
| 2009 | 25 | 47 |
| 2010 | 35 | 62 |
| 2011 | 38 | 43 |
| 2012 | 26 | 48 |
| 2013 | 46 | 51 |
| 2014 | 35 | 49 |
| 2015 | 27 | 45 |
| 2016 | 22 | 46 |
| 2017 | 44 | 68 |
| 2018 | 32 | 85 |
| 2019 | 81 | 92 |
| 2020 | 68 | 140 |
| 2021 | 63 | 96 |
| 2022 | 106 | 123 |
| 2023 | 84 | 115 |
| 2024 | 116 | 120 |
| 2025 | 101 | 103 |
| 2026 | 50 | 55 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Stator arrangement for a radial flux motor6 Oct 2026US 12,756,248 B2BorgWarner Inc.
- In-wheel motor with improved heat dissipation15 Sep 2026US 12,738,779 B2Tidnab Innovations Inc.
- Electric motor15 Sep 2026US 12,738,798 B2BorgWarner Inc.
- Fan casing, blower assembly, and vehicle air conditioning system15 Sep 2026US 12,738,802 B2Luxshare Intelligent Manufacture Technology (Changshu) Co., Ltd
- Electric motor including outer rotor body, surrounding cover, and fan integrally formed with the cover15 Sep 2026US 12,738,807 B2Milwaukee Electric Tool Corporation
- Engine cooling fan motor for vehicle8 Oct 2026US 2026/0312466 A1New Motech Co., Ltd.
- Motor and blower1 Oct 2026US 2026/0298253 A1Nidec Corporation
- Rotating electric machine system1 Oct 2026US 2026/0302873 A1Honda Motor Co., Ltd.
- Power tool with compact outer-rotor motor assembly1 Oct 2026US 2026/0302884 A1Black & Decker Inc.
- Cooling structure of rotating electric machine1 Oct 2026US 2026/0302890 A1Honda Motor Co., Ltd.
Most cited
By later US patents
- Electric machine having an integrally continuous stator winding and stator slot bridges1,193US 6,936,948 B2Pratt & Whitney Canada Corp. · 2005
- Architecture for electric machine1,149US 7,583,063 B2Pratt & Whitney Canada Corp. · 2009
- Encoder alternator139US 7,362,018 B1Brunswick Corporation · 2008
- Structure of driving unit in drum type washing machine125US 6,460,382 B1LG Electronics Inc. · 2002
- Disk drive comprising a spindle motor having a windings shield for reduced disk voltage coupling112US 7,113,365 B1Western Digital Technologies, Inc. · 2006