F16D 35/00
Fluid clutches in which the clutching is predominantly obtained by fluid adhesion
Official title: Fluid clutches in which the clutching is predominantly obtained by fluid adhesion (F16D37/00 takes precedence {; arrangements of viscous clutches in four-wheel drives - B60K17/3465 and B60K17/351})
F16D35/00 (Fluid clutches in which the clutching is predominantly obtained by fluid adhesion) appears on 695 US grants and 191 published applications in this corpus.
Search patents in F16D- Granted patents
- 695
- Published applications
- 191
- Assignees
- 167
- Inventors
- 621
- Latest grant
- 9 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 22 | 0 |
| 1978 | 16 | 0 |
| 1979 | 6 | 0 |
| 1980 | 10 | 0 |
| 1981 | 19 | 0 |
| 1982 | 13 | 0 |
| 1983 | 8 | 0 |
| 1984 | 22 | 0 |
| 1985 | 14 | 0 |
| 1986 | 19 | 0 |
| 1987 | 36 | 0 |
| 1988 | 20 | 0 |
| 1989 | 29 | 0 |
| 1990 | 55 | 0 |
| 1991 | 39 | 0 |
| 1992 | 38 | 0 |
| 1993 | 15 | 0 |
| 1994 | 15 | 0 |
| 1995 | 15 | 0 |
| 1996 | 17 | 0 |
| 1997 | 16 | 0 |
| 1998 | 13 | 0 |
| 1999 | 22 | 0 |
| 2000 | 14 | 0 |
| 2001 | 15 | 4 |
| 2002 | 12 | 8 |
| 2003 | 9 | 8 |
| 2004 | 9 | 9 |
| 2005 | 5 | 7 |
| 2006 | 3 | 10 |
| 2007 | 4 | 7 |
| 2008 | 7 | 9 |
| 2009 | 7 | 6 |
| 2010 | 4 | 7 |
| 2011 | 10 | 7 |
| 2012 | 5 | 8 |
| 2013 | 5 | 5 |
| 2014 | 12 | 7 |
| 2015 | 6 | 14 |
| 2016 | 12 | 15 |
| 2017 | 11 | 10 |
| 2018 | 5 | 9 |
| 2019 | 6 | 16 |
| 2020 | 23 | 8 |
| 2021 | 7 | 4 |
| 2022 | 5 | 3 |
| 2023 | 6 | 3 |
| 2024 | 3 | 1 |
| 2025 | 2 | 2 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Viscous clutch with front-mounted electromagnetic coil, modular valve and front hub subassemblies for a viscous clutch, and method of making9 Sep 2025US 12,410,836 B2Horton, Inc.
- Power transmission device4 Mar 2025US 12,241,535 B2Toyota Jidosha Kabushiki Kaisha
- Electronically controlled viscous coupler for combine harvester26 Nov 2024US 12,150,412 B2CNH Industrial America LLC
- Clutch system with phase changing materials9 Apr 2024US 11,953,061 B2The Johns Hopkins University
- Valve control system for viscous friction clutch16 Jan 2024US 11,873,868 B2Horton, Inc.
- Grinding belt unit for double-sided sheet metal processing6 Aug 2026US 2026/0225203 A1ARKU Maschinenbau GmbH
- Resilient dust cover for fan clutch assembly30 Jul 2026US 2026/0218760 A1Volvo Truck Corporation
- Braking system for a vehicle and a wheel brake device16 Jul 2026US 2026/0200444 A1Mercedes-Benz Group AG
- Apparatus for transmitting power from a power generating device having high torque irregularities to an electrical machine, and motor vehicle comprising such apparatus18 Jun 2026US 2026/0168565 A1Volvo Truck Corporation
- System and method for control of reversal events using magnetorheological fluid2 Oct 2025US 2025/0305555 A1Exonetik Inc.
Most cited
By later US patents
- Automatic control valves579US 4,176,630 ADynair Limited · 1979
- Multi-range starter-generator drive109US 4,708,030 ASundstrand Corporation · 1987
- Coupling apparatus for full time four wheel drive87US 4,031,780 AChrysler Corporation · 1977
- Vehicle drivetrain hydraulic coupling70US 5,310,388 AASHA Corporation · 1994
- Control couplings64US 4,058,027 AGKN Transmissions Limited · 1977