H02K 9/197
In which the rotor or stator space is fluid-tight
Official title: in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
H02K9/197 (In which the rotor or stator space is fluid-tight) appears on 763 US grants and 947 published applications in this corpus.
Search patents in H02K- Granted patents
- 763
- Published applications
- 947
- Assignees
- 390
- Inventors
- 2,009
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 9 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 7 | 0 |
| 2000 | 2 | 0 |
| 2001 | 9 | 0 |
| 2002 | 3 | 10 |
| 2003 | 3 | 7 |
| 2004 | 10 | 11 |
| 2005 | 9 | 13 |
| 2006 | 6 | 6 |
| 2007 | 5 | 14 |
| 2008 | 6 | 15 |
| 2009 | 14 | 13 |
| 2010 | 10 | 16 |
| 2011 | 12 | 21 |
| 2012 | 8 | 21 |
| 2013 | 17 | 39 |
| 2014 | 15 | 30 |
| 2015 | 16 | 37 |
| 2016 | 29 | 32 |
| 2017 | 27 | 42 |
| 2018 | 32 | 50 |
| 2019 | 35 | 53 |
| 2020 | 54 | 72 |
| 2021 | 52 | 80 |
| 2022 | 50 | 76 |
| 2023 | 45 | 80 |
| 2024 | 72 | 101 |
| 2025 | 73 | 62 |
| 2026 | 54 | 46 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Electric machine with a closed coolant circuit, in particular for driving a vehicle22 Sep 2026US 12,744,425 B2Valeo eAutomotive Germany GmbH
- Electric machine comprising a stator and a conductor support arranged at an axial end of the stator22 Sep 2026US 12,744,432 B2Schaeffler Technologies AG & Co. KG
- Electric motor cooling system15 Sep 2026US 12,738,810 B2Dana Automotive Systems Group, LLC
- Stator sealing member27 Aug 2026US 2026/0254296 A1Safran Electrical & Power
- Stator of an axial-flow rotary electrical machine27 Aug 2026US 2026/0254322 A1Ampere S.A.S.
- Stator and electric machine20 Aug 2026US 2026/0246320 A1Schaeffler Technologies AG & Co. KG
- Electric machine in-slot cooling manifold20 Aug 2026US 2026/0246337 A1Ford Global Technologies, LLC
- Motor unit13 Aug 2026US 2026/0238056 A1Toyota Jidosha Kabushiki Kaisha
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
- Liquid cooled asynchronous electric machine101US 6,191,511 B1The Swatch Group Management Services AG · 2001
- Electrical drive for a wheel hub94US 6,328,123 B1DaimlerChrysler AG · 2001