H02K 21/025
By varying the thickness of the air gap between field and armature
Official title: {by varying the thickness of the air gap between field and armature}
H02K21/025 (By varying the thickness of the air gap between field and armature) appears on 103 US grants and 124 published applications in this corpus.
Search patents in H02K- Granted patents
- 103
- Published applications
- 124
- Assignees
- 76
- Inventors
- 255
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 2 |
| 2003 | 0 | 2 |
| 2004 | 0 | 0 |
| 2005 | 3 | 2 |
| 2006 | 2 | 5 |
| 2007 | 0 | 4 |
| 2008 | 4 | 3 |
| 2009 | 2 | 4 |
| 2010 | 2 | 3 |
| 2011 | 3 | 5 |
| 2012 | 2 | 5 |
| 2013 | 3 | 4 |
| 2014 | 3 | 7 |
| 2015 | 2 | 5 |
| 2016 | 6 | 1 |
| 2017 | 3 | 12 |
| 2018 | 5 | 3 |
| 2019 | 10 | 7 |
| 2020 | 5 | 12 |
| 2021 | 6 | 7 |
| 2022 | 8 | 9 |
| 2023 | 7 | 10 |
| 2024 | 2 | 8 |
| 2025 | 10 | 2 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electric axial flux machine with pretensioned stator components, and electric machine assembly comprising such an electric axial flux machine15 Sep 2026US 12,738,824 B2Schaeffler Technologies AG & Co. KG
- Axial flux motor which is fixed to a housing and has an adjustment function18 Aug 2026US 12,712,419 B2Schaeffler Technologies AG & Co. KG
- Axial flux motor structure using magnetic levitation force and rotational force21 Apr 2026US 12,609,595 B2Hyundai Motor Company
- Electric machine and motor vehicle with wall element and tooth head ring17 Mar 2026US 12,580,432 B2Dr. Ing. h,c.F. Porsche Aktiengesellschaft
- Electric axial flux machine21 Oct 2025US 12,451,780 B2Schaeffler Technologies AG & Co. KG
- Magnetic hysteresis brake with adjustable air gap13 Aug 2026US 2026/0238081 A1Safran Electronics & Defense Actuation
- Machine assembly with vertically-spaced levitation and axial adjustment actuators18 Jun 2026US 2026/0171880 A1
- Electric axial flux machine with pretensioned stator components, and electric machine assembly comprising such an electric axial flux machine17 Jul 2025US 2025/0233495 A1Schaeffler Technologies AG & Co. KG
- Method For Operating An Electric Motor13 Mar 2025US 2025/0088085 A1Vitesco Technologies GmbH
- Axial flux motor which is fixed to a housing and has an adjustment function26 Dec 2024US 2024/0429800 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents
- Air gap control systems and methods405US 10,193,429 B2Boulder Wind Power, Inc. · 2019
- Wind energy conversion system108US 7,098,552 B2WECS, Inc. · 2006
- Wind energy conversion system107US 6,952,058 B2WECS, Inc. · 2005
- Wind energy conversion system105US 7,116,006 B2WECS, Inc. · 2006
- Electric motor with active hysteresis-based control of winding currents and/or having an efficient stator winding arrangement and/or adjustable air gap65US 6,348,751 B1New Generation Motors Corporation · 2002