H02K 9/00
Arrangements for cooling or ventilating
Official title: Arrangements for cooling or ventilating (channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24)
H02K9/00 (Arrangements for cooling or ventilating) appears on 6,971 US grants and 8,251 published applications in this corpus.
Search patents in H02K- Granted patents
- 6,971
- Published applications
- 8,251
- Assignees
- 1,993
- Inventors
- 14,254
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 25 | 0 |
| 1978 | 34 | 0 |
| 1979 | 26 | 0 |
| 1980 | 41 | 0 |
| 1981 | 36 | 0 |
| 1982 | 43 | 0 |
| 1983 | 27 | 0 |
| 1984 | 32 | 0 |
| 1985 | 31 | 0 |
| 1986 | 28 | 0 |
| 1987 | 34 | 0 |
| 1988 | 22 | 0 |
| 1989 | 45 | 0 |
| 1990 | 32 | 0 |
| 1991 | 38 | 0 |
| 1992 | 34 | 0 |
| 1993 | 38 | 0 |
| 1994 | 48 | 0 |
| 1995 | 22 | 0 |
| 1996 | 31 | 0 |
| 1997 | 50 | 0 |
| 1998 | 68 | 0 |
| 1999 | 80 | 0 |
| 2000 | 66 | 0 |
| 2001 | 75 | 24 |
| 2002 | 89 | 98 |
| 2003 | 77 | 91 |
| 2004 | 117 | 132 |
| 2005 | 87 | 135 |
| 2006 | 89 | 126 |
| 2007 | 67 | 128 |
| 2008 | 87 | 134 |
| 2009 | 97 | 139 |
| 2010 | 108 | 185 |
| 2011 | 118 | 168 |
| 2012 | 119 | 198 |
| 2013 | 149 | 301 |
| 2014 | 149 | 347 |
| 2015 | 195 | 341 |
| 2016 | 224 | 309 |
| 2017 | 256 | 355 |
| 2018 | 246 | 391 |
| 2019 | 369 | 535 |
| 2020 | 443 | 544 |
| 2021 | 421 | 562 |
| 2022 | 447 | 659 |
| 2023 | 455 | 673 |
| 2024 | 575 | 677 |
| 2025 | 587 | 579 |
| 2026 | 375 | 420 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H02K 9/19Arrangements for cooling or ventilating: for machines with closed casing and closed-circuit2,738
- H02K 9/02Arrangements for cooling or ventilating: by ambient air flowing through the machine2,392
- H02K 9/22Arrangements for cooling or ventilating: by solid heat conducting material embedded in1,462
- H02K 9/14Wherein gaseous cooling medium circulates between the machine casing and a surrounding531
- H02K 9/10Arrangements for cooling or ventilating: by gaseous cooling medium flowing in closed391
- H02K 9/28Cooling of commutators, slip-rings or brushes e.g. by ventilating190
- H02K 9/08Arrangements for cooling or ventilating: by gaseous cooling medium circulating wholly within187
- H02K 9/26Structural association of machines with devices for cleaning or drying cooling medium136
All 9 subgroupsShow fewer
Recent patents
- Steering gears with electric steering assist systems and related methods6 Oct 2026US 12,752,835 B2Ford Global Technologies, LLC
- Cooling circuit for an electric generator6 Oct 2026US 12,753,741 B2Siemens Gamesa Renewable Energy A/S
- Dual oil pump with centrifugal shifter6 Oct 2026US 12,753,804 B1Schaeffler Technologies AG & Co. KG
- Rotor, rotary electric machine, and drive device6 Oct 2026US 12,756,252 B2Nidec Corporation
- Pressure equalization device for an electric machine, housing, electric machine and motor vehicle6 Oct 2026US 12,756,262 B2Bayerische Motoren Werke Aktiengesellschaft
- Devices and systems for thermal management and ingress protection of medical devices8 Oct 2026US 2026/0306358 A1Zoll Circulation, Inc.
- Power tool with compact motor assembly8 Oct 2026US 2026/0307221 A1Black & Decker Inc.
- Motor Retention and Airflow Guide in a Power Tool8 Oct 2026US 2026/0307234 A1Black & Decker Inc.
- Motor vehicle drive unit and electrically driven motor vehicle drive axle8 Oct 2026US 2026/0309223 A1ZF Friedrichshafen AG
- Stator for an electric machine and method for producing a stator8 Oct 2026US 2026/0312451 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents
- Methods and apparatus for increasing power of permanent magnet motors1,432US 6,777,838 B22004
- Power tool with separate motor case compartment614US 10,404,136 B2Black & Decker Inc. · 2019
- Blower with bearing tube333US 8,636,479 B2ResMed Motor Technologies Inc. · 2014
- Brushless DC motor with bearings329US 8,638,014 B2ResMed Motor Technologies Inc. · 2014
- System for reducing noise in a hydraulic fracturing fleet263US 9,587,649 B2U.S. Well Services, LLC · 2017