H02K 23/20
Having additional brushes spaced intermediately of the main brushes on the commutator
Official title: having additional brushes spaced intermediately of the main brushes on the commutator, e.g. cross-field machines, metadynes, amplidynes or other armature-reaction excited machines
H02K23/20 (Having additional brushes spaced intermediately of the main brushes on the commutator) appears on 29 US grants and 18 published applications in this corpus.
Search patents in H02K- Granted patents
- 29
- Published applications
- 18
- Assignees
- 18
- Inventors
- 52
- Latest grant
- 31 Mar 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 2 |
| 2010 | 0 | 2 |
| 2011 | 2 | 5 |
| 2012 | 0 | 1 |
| 2013 | 5 | 1 |
| 2014 | 1 | 0 |
| 2015 | 2 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Actuator with switchable releasing speed31 Mar 2020US 10,605,341 B2Timotion Technology Co., Ltd.
- Electric motor1 Mar 2016US RE45,912 E1Mitsuba Corporation
- Brushed direct current electric motor with salient pole rotor4 Aug 2015US 9,099,909 B2Johnson Electric S. A.
- Windshield wiper motor16 Jun 2015US 9,059,622 B2Mitsuba Corporation
- Pump control apparatus and brake control system29 Apr 2014US 8,708,428 B2Toyota Jidosha Kabushiki Kaisha
- Actuator with switchable releasing speed28 Mar 2019US 2019/0093743 A1Timotion Technology Co., Ltd.
- Internal-combustion engine valve timing control device15 Nov 2018US 2018/0328239 A1Hitachi Automotive Systems, Ltd.
- Windshield wiper motor27 Jun 2013US 2013/0162087 A1Mitsuba Corporation
- Electric motor1 Nov 2012US 2012/0274170 A1Johnson Electric S. A.
- Motor and brush configuration method14 Jul 2011US 2011/0169371 A1ASMO Co.LTD
Most cited
By later US patents
- Multi-speed motor29US 5,485,049 AUnited Technologies Motor Systems, Inc. · 1996
- Sliding brush system with shape memory alloy element for two-speed direct current motor22US 5,734,219 ASiemens Electric Limited · 1998
- Direct current motor with double layer armature windings21US 4,227,107 A1980
- Sleeve type of coreless motor with reduced starting current19US 5,847,484 AMatsushita Electric Industrial Co., Ltd. · 1998
- Drive mechanism for windshield wiper systems on motor vehicles18US 5,023,532 ASWF Auto-Electric GmbH · 1991