H01R 39/56
Devices for lubricating or polishing slip-rings or commutators during operation of the
Official title: Devices for lubricating or polishing slip-rings or commutators during operation of the collector
H01R39/56 (Devices for lubricating or polishing slip-rings or commutators during operation of the) appears on 31 US grants and 26 published applications in this corpus.
Search patents in H01R- Granted patents
- 31
- Published applications
- 26
- Assignees
- 24
- Inventors
- 62
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 3 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 3 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 1 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 2 |
| 2022 | 3 | 1 |
| 2023 | 2 | 1 |
| 2024 | 0 | 3 |
| 2025 | 2 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Collection device for collecting electrical currents, and machine comprising a collection device of this kind10 Mar 2026US 12,573,922 B2Schunk Carbon Technology GmbH
- Contacting device for transmitting electric currents, and machines comprising such a contacting device20 Jan 2026US 12,531,460 B2Schunk Carbon Technology GmbH
- Carbon grounding brush18 Mar 2025US 12,255,429 B2TRIS Inc.
- Systems and methods to mitigate electrical voltage on a rotating shaft immersed in oil18 Feb 2025US 12,231,007 B2Illinois Tool Works Inc.
- Slipring with wear monitoring23 May 2023US 11,658,449 B2Schleifring GmbH
- Drive unit for a motor vehicle, in particular for a car, and motor vehicle27 Aug 2026US 2026/0254311 A1Bayerische Motoren Werke Aktiengesellschaft
- Discharge device for discharging electric currents, and machine comprising a discharge device of this kind11 Dec 2025US 2025/0379407 A1
- Diverting device for diverting electrical currents, and machine comprising a diverting device of this type11 Dec 2025US 2025/0379408 A1
- Systems and methods to mitigate electrical voltage on a rotating shaft immersed in oil17 Jul 2025US 2025/0233493 A1Illinois Tool Works Inc.
- Discharge device for discharging electrical currents and machine comprising such a discharge device10 Oct 2024US 2024/0339896 A1Audi AG
Most cited
By later US patents
- Method and apparatus for increasing the efficiency of electrical rotary machines18US 5,517,072 AEfficient Propulsion, Inc. · 1996
- Solid lubricant composition14US 5,445,748 ADow Corning Corporation · 1995
- Brush and slip ring arrangement of an AC generator11US 5,744,892 ANippondenso Co., Ltd. · 1998
- Method of treating a carbon current collection brush blank and brush resulting therefrom9US 4,605,581 AGeneral Electric Company · 1986
- Slip-ring configuration in electric motors and generators, slip-ring body and method for retooling slip-ring bodies9US 6,400,057 B2Sgl Carbon SE · 2002