H02K 9/19
Arrangements for cooling or ventilating: for machines with closed casing and closed-circuit
Official title: for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K9/19 (Arrangements for cooling or ventilating: for machines with closed casing and closed-circuit) appears on 2,738 US grants and 3,613 published applications in this corpus.
Search patents in H02K- Granted patents
- 2,738
- Published applications
- 3,613
- Assignees
- 921
- Inventors
- 6,347
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 9 | 0 |
| 1978 | 9 | 0 |
| 1979 | 8 | 0 |
| 1980 | 21 | 0 |
| 1981 | 12 | 0 |
| 1982 | 16 | 0 |
| 1983 | 12 | 0 |
| 1984 | 9 | 0 |
| 1985 | 9 | 0 |
| 1986 | 10 | 0 |
| 1987 | 14 | 0 |
| 1988 | 6 | 0 |
| 1989 | 10 | 0 |
| 1990 | 11 | 0 |
| 1991 | 11 | 0 |
| 1992 | 13 | 0 |
| 1993 | 8 | 0 |
| 1994 | 7 | 0 |
| 1995 | 8 | 0 |
| 1996 | 11 | 0 |
| 1997 | 11 | 0 |
| 1998 | 12 | 0 |
| 1999 | 15 | 0 |
| 2000 | 7 | 0 |
| 2001 | 21 | 2 |
| 2002 | 10 | 22 |
| 2003 | 16 | 23 |
| 2004 | 27 | 22 |
| 2005 | 14 | 31 |
| 2006 | 13 | 24 |
| 2007 | 16 | 33 |
| 2008 | 17 | 33 |
| 2009 | 28 | 36 |
| 2010 | 28 | 59 |
| 2011 | 36 | 62 |
| 2012 | 45 | 82 |
| 2013 | 64 | 99 |
| 2014 | 53 | 98 |
| 2015 | 59 | 109 |
| 2016 | 70 | 103 |
| 2017 | 83 | 95 |
| 2018 | 79 | 125 |
| 2019 | 107 | 204 |
| 2020 | 153 | 227 |
| 2021 | 157 | 280 |
| 2022 | 201 | 360 |
| 2023 | 249 | 409 |
| 2024 | 325 | 431 |
| 2025 | 361 | 368 |
| 2026 | 245 | 276 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- 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
- Spray ring for an electric machine for cooling stator windings, and electric machine8 Oct 2026US 2026/0312464 A1
- Electric motor with cooling system8 Oct 2026US 2026/0312465 A1Sonceboz Motion Boncourt SA
- Rotor, separately excited synchronous machine and motor vehicle8 Oct 2026US 2026/0312469 A1
Most cited
By later US patents
- Electric motor187US 9,570,945 B2Grundfos Holding A/S · 2017
- Thermal and secondary flow management of electrically driven compressors111US 7,633,193 B2Honeywell International Inc. · 2009
- Liquid cooling the rotor of an electrical machine105US 5,189,325 AGeneral Electric Company · 1993
- Electrical motor drive apparatus with planetary gearing102US 5,382,854 AKabushikikaisha Equos Research · 1995
- Liquid cooled asynchronous electric machine101US 6,191,511 B1The Swatch Group Management Services AG · 2001