H02K 9/02
Arrangements for cooling or ventilating: by ambient air flowing through the machine
Official title: by ambient air flowing through the machine
H02K9/02 (Arrangements for cooling or ventilating: by ambient air flowing through the machine) appears on 2,392 US grants and 2,715 published applications in this corpus.
Search patents in H02K- Granted patents
- 2,392
- Published applications
- 2,715
- Assignees
- 878
- Inventors
- 5,199
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 6 | 0 |
| 1981 | 8 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 13 | 0 |
| 1985 | 12 | 0 |
| 1986 | 13 | 0 |
| 1987 | 10 | 0 |
| 1988 | 5 | 0 |
| 1989 | 15 | 0 |
| 1990 | 12 | 0 |
| 1991 | 11 | 0 |
| 1992 | 10 | 0 |
| 1993 | 18 | 0 |
| 1994 | 14 | 0 |
| 1995 | 7 | 0 |
| 1996 | 6 | 0 |
| 1997 | 16 | 0 |
| 1998 | 29 | 0 |
| 1999 | 42 | 0 |
| 2000 | 42 | 0 |
| 2001 | 27 | 14 |
| 2002 | 45 | 37 |
| 2003 | 32 | 42 |
| 2004 | 50 | 62 |
| 2005 | 44 | 63 |
| 2006 | 43 | 66 |
| 2007 | 28 | 58 |
| 2008 | 48 | 55 |
| 2009 | 38 | 58 |
| 2010 | 45 | 59 |
| 2011 | 45 | 58 |
| 2012 | 39 | 64 |
| 2013 | 49 | 98 |
| 2014 | 41 | 108 |
| 2015 | 79 | 138 |
| 2016 | 78 | 138 |
| 2017 | 95 | 155 |
| 2018 | 100 | 152 |
| 2019 | 155 | 213 |
| 2020 | 177 | 156 |
| 2021 | 149 | 172 |
| 2022 | 136 | 189 |
| 2023 | 126 | 183 |
| 2024 | 168 | 157 |
| 2025 | 156 | 129 |
| 2026 | 84 | 91 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electric propulsion device with hollow shaft and cooling blades and support body with heat member on outer surface29 Sep 2026US 12,747,029 B2Mitsubishi Heavy Industries, Ltd.
- Brushless DC motor power tool with combined PCB design29 Sep 2026US 12,749,945 B2Milwaukee Electric Tool Corporation
- Motor driver circuit and driving method, cooling device and electronic apparatus using the same29 Sep 2026US 12,749,953 B2Rohm Co., Ltd.
- Air cooling apparatus for electric machine22 Sep 2026US 12,744,433 B2ANDRITZ HYDRO GmbH
- Stator module and conveyor system22 Sep 2026US 12,744,441 B2Shanghai Golytec Automation Co., Ltd.
- 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.
- Power tool with compact outer-rotor motor assembly1 Oct 2026US 2026/0302884 A1Black & Decker Inc.
- Fan assembly for an electric motor and electric motor comprising such a fan assembly1 Oct 2026US 2026/0302888 A1ALSTOM Holdings
- Motor unit and electric working machine24 Sep 2026US 2026/0291330 A1Makita Corporation
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
- System for reducing noise in a hydraulic fracturing fleet263US 9,587,649 B2U.S. Well Services, LLC · 2017
- Mobile power generation system including fixture assembly254US 10,371,012 B2On-Power, Inc. · 2019
- Hybrid alternator213US 5,747,909 AEcoair Corp. · 1998