H02K 9/08
Arrangements for cooling or ventilating: by gaseous cooling medium circulating wholly within
Official title: by gaseous cooling medium circulating wholly within the machine casing (H02K9/10 takes precedence)
H02K9/08 (Arrangements for cooling or ventilating: by gaseous cooling medium circulating wholly within) appears on 187 US grants and 260 published applications in this corpus.
Search patents in H02K- Granted patents
- 187
- Published applications
- 260
- Assignees
- 116
- Inventors
- 592
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 4 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 3 |
| 2009 | 2 | 3 |
| 2010 | 3 | 5 |
| 2011 | 4 | 5 |
| 2012 | 5 | 5 |
| 2013 | 2 | 8 |
| 2014 | 6 | 18 |
| 2015 | 5 | 16 |
| 2016 | 12 | 18 |
| 2017 | 15 | 14 |
| 2018 | 12 | 12 |
| 2019 | 14 | 20 |
| 2020 | 13 | 27 |
| 2021 | 15 | 19 |
| 2022 | 13 | 26 |
| 2023 | 10 | 17 |
| 2024 | 13 | 19 |
| 2025 | 17 | 9 |
| 2026 | 6 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electrical machine with rotor shaft cooling channels30 Jun 2026US 12,671,289 B2Rolls-Royce Deutschland Ltd & Co KG
- Stator cooled electric motor19 May 2026US 12,633,792 B2Garrett Transportation I Inc.
- Magnetic geared electrical machine, power generation system, and drive system21 Apr 2026US 12,609,594 B2Mitsubishi Heavy Industries, Ltd.
- Rotary electrical machine17 Mar 2026US 12,580,450 B2Nissan Motor Co., Ltd.
- External rotor motor with a cooling wheel for cooling the stator10 Mar 2026US 12,573,916 B2ebm-papst Mulfingen GmbH & Co. KG
- Gas-floating centrifugal refrigerant compressor17 Sep 2026US 2026/0276264 A1Xeca Turbo (Chongqing) Technology Co., Ltd
- Self-ventilated open traction motor and rail vehicle equipped with such a motor18 Jun 2026US 2026/0171871 A1ALSTOM Holdings
- Method for monitoring health of an electric machine11 Jun 2026US 2026/0163450 A1GE Aviation Systems LLC
- Drive device21 May 2026US 2026/0142523 A1Denso Corporation
- Motor assembly having end frame cooling system7 May 2026US 2026/0128649 A1
Most cited
By later US patents
- Electric machine98US 6,720,688 B12004
- Anisotropic magnet brushless motor having a rotor with elastic insulating support structure42US 6,404,086 B1Hitachi Car Engineering Co., Ltd. · 2002
- Electric machine stator cooling systems and methods36US 10,177,631 B1Zero E Technologies, LLC · 2019
- Totally-enclosed traction motor for electric railcar36US 5,789,833 AKabushiki Kaisha Toshiba · 1998
- Enhanced cooling of enclosed air cooled high power motors35US 9,413,208 B2Hamilton Sundstrand Corporation · 2016