H02K 1/32
With channels or ducts for flow of cooling medium
Official title: with channels or ducts for flow of cooling medium
H02K1/32 (With channels or ducts for flow of cooling medium) appears on 1,232 US grants and 1,633 published applications in this corpus.
Search patents in H02K- Granted patents
- 1,232
- Published applications
- 1,633
- Assignees
- 490
- Inventors
- 3,017
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 6 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 6 | 0 |
| 1999 | 14 | 0 |
| 2000 | 7 | 0 |
| 2001 | 10 | 2 |
| 2002 | 15 | 22 |
| 2003 | 13 | 14 |
| 2004 | 14 | 22 |
| 2005 | 13 | 13 |
| 2006 | 17 | 17 |
| 2007 | 6 | 23 |
| 2008 | 12 | 23 |
| 2009 | 16 | 22 |
| 2010 | 23 | 36 |
| 2011 | 28 | 41 |
| 2012 | 19 | 47 |
| 2013 | 22 | 48 |
| 2014 | 28 | 39 |
| 2015 | 40 | 69 |
| 2016 | 24 | 60 |
| 2017 | 61 | 55 |
| 2018 | 44 | 70 |
| 2019 | 71 | 124 |
| 2020 | 84 | 121 |
| 2021 | 103 | 112 |
| 2022 | 95 | 105 |
| 2023 | 82 | 119 |
| 2024 | 108 | 189 |
| 2025 | 124 | 124 |
| 2026 | 94 | 116 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rotor, rotary electric machine, and drive device6 Oct 2026US 12,756,252 B2Nidec Corporation
- Axial flux electric motor with rotor cooling29 Sep 2026US 12,749,935 B2GM Global Technology Operations LLC
- Rotor arrangement for improved cooling of a rotor29 Sep 2026US 12,749,936 B2ZF Friedrichshafen AG
- Vehicle motor rotor shaft22 Sep 2026US 12,744,421 B2GM Global Technology Operations LLC
- Electric machine with a closed coolant circuit, in particular for driving a vehicle22 Sep 2026US 12,744,425 B2Valeo eAutomotive Germany GmbH
- Pod drive8 Oct 2026US 2026/0307770 A1Hd Hyundai Electric Co., Ltd.
- Improvements relating to cooling of electric machines8 Oct 2026US 2026/0312450 A1Vestas Wind Systems A/S
- A generator for use in a wind turbine8 Oct 2026US 2026/0312460 A1Vestas Wind Systems A/S
- Systems and methods for rotor assemblies and manufacturing thereof1 Oct 2026US 2026/0296634 A1Archer Aviation Inc.
- Cooling a rotor of an axial flux induction machine1 Oct 2026US 2026/0302859 A1Aura Systems, Inc.
Most cited
By later US patents
- Electric machine98US 6,720,688 B12004
- Salient pole rotor for a dynamoelectric machine74US 5,086,246 AGeneral Electric Canada Inc. · 1992
- Structure of driving unit in drum type washing machine74US 6,510,716 B1LG Electronics Inc. · 2003
- Rotor cooling system for synchronous machines with conductive sleeve73US 7,208,854 B1Hamilton Sundstrand Corporation · 2007
- Cooling rotor for an alternator mounted on vehicle72US 5,306,977 ANippondenso Co., Ltd. · 1994