F16D 27/112
With flat friction surfaces
Official title: with flat friction surfaces, e.g. discs
F16D27/112 (With flat friction surfaces) appears on 767 US grants and 556 published applications in this corpus.
Search patents in F16D- Granted patents
- 767
- Published applications
- 556
- Assignees
- 273
- Inventors
- 1,213
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 10 | 0 |
| 1979 | 5 | 0 |
| 1980 | 7 | 0 |
| 1981 | 8 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 9 | 0 |
| 1985 | 8 | 0 |
| 1986 | 12 | 0 |
| 1987 | 9 | 0 |
| 1988 | 6 | 0 |
| 1989 | 13 | 0 |
| 1990 | 17 | 0 |
| 1991 | 11 | 0 |
| 1992 | 15 | 0 |
| 1993 | 9 | 0 |
| 1994 | 15 | 0 |
| 1995 | 14 | 0 |
| 1996 | 15 | 0 |
| 1997 | 15 | 0 |
| 1998 | 18 | 0 |
| 1999 | 32 | 0 |
| 2000 | 20 | 0 |
| 2001 | 12 | 5 |
| 2002 | 20 | 29 |
| 2003 | 35 | 38 |
| 2004 | 28 | 25 |
| 2005 | 19 | 25 |
| 2006 | 20 | 29 |
| 2007 | 6 | 26 |
| 2008 | 10 | 26 |
| 2009 | 19 | 23 |
| 2010 | 20 | 26 |
| 2011 | 15 | 15 |
| 2012 | 19 | 19 |
| 2013 | 22 | 25 |
| 2014 | 24 | 31 |
| 2015 | 26 | 26 |
| 2016 | 24 | 31 |
| 2017 | 22 | 28 |
| 2018 | 22 | 23 |
| 2019 | 26 | 24 |
| 2020 | 16 | 21 |
| 2021 | 26 | 20 |
| 2022 | 22 | 13 |
| 2023 | 11 | 10 |
| 2024 | 11 | 6 |
| 2025 | 10 | 5 |
| 2026 | 2 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power transmission system16 Jun 2026US 12,655,878 B2Isuzu Motors Limited
- Dynamically engageable electromechanical brake7 Apr 2026US 12,595,828 B2Halliburton Energy Services.Inc.
- Electromagnetic switchable clutch2 Dec 2025US 12,486,875 B2Schaeffler Technologies AG & Co. KG
- Electromagnetic clutch4 Nov 2025US 12,460,686 B2Zpe Licensing Inc.
- Selectable torque path torque converter26 Aug 2025US 12,398,792 B2Exedy GlobalParts Corporation
- Dynamically Engageable Electromechanical Brake30 Jul 2026US 2026/0218763 A1Halliburton Energy Services.Inc.
- Electromagnetic brake or clutch18 Jun 2026US 2026/0168546 A1Kendrion (Villingen) GmbH
- Electroadhesion control of rotary motion14 May 2026US 2026/0131460 A1The University of Western Ontario
- Actuator assembly for use with a clutch30 Apr 2026US 2026/0117828 A1Means Industries, Inc.
- Electromagnetic clutch9 Apr 2026US 2026/0098567 A1Zpe Licensing Inc.
Most cited
By later US patents
- On demand vehicle drive system173US 5,407,024 ABorg-Warner Automotive, Inc. · 1995
- Method of manufacturing an electromagnetic clutch106US 5,642,560 ANippondenso Co., Ltd. · 1997
- Transfer case having parallel clutches and lockup feature88US 5,584,776 ABorg-Warner Automotive, Inc. · 1996
- Modulating clutch having passive torque throughout threshold58US 5,699,888 ABorg-Warner Automotive, Inc. · 1997
- Rotation transmission device58US 5,924,510 ANtn Corporation · 1999