F01P 7/081
Using clutches
Official title: {using clutches, e.g. electro-magnetic or induction clutches}
F01P7/081 (Using clutches) appears on 109 US grants and 58 published applications in this corpus.
Search patents in F01P- Granted patents
- 109
- Published applications
- 58
- Assignees
- 62
- Inventors
- 177
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 10 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 0 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 2 |
| 2002 | 1 | 2 |
| 2003 | 3 | 1 |
| 2004 | 0 | 2 |
| 2005 | 3 | 3 |
| 2006 | 4 | 4 |
| 2007 | 1 | 3 |
| 2008 | 0 | 3 |
| 2009 | 1 | 3 |
| 2010 | 2 | 3 |
| 2011 | 3 | 2 |
| 2012 | 1 | 1 |
| 2013 | 2 | 1 |
| 2014 | 0 | 2 |
| 2015 | 2 | 5 |
| 2016 | 4 | 3 |
| 2017 | 3 | 3 |
| 2018 | 2 | 2 |
| 2019 | 2 | 3 |
| 2020 | 3 | 2 |
| 2021 | 0 | 2 |
| 2022 | 4 | 3 |
| 2023 | 3 | 2 |
| 2024 | 2 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Transmission device for driving a fan of a cooling circuit of an internal combustion engine, associated cooling circuit, and vehicle21 Apr 2026US 12,607,142 B2Volvo Truck Corporation
- Coolant pump for a vehicle5 Mar 2024US 11,920,598 B2Baruffaldi S.p.A.
- Valve control system for viscous friction clutch16 Jan 2024US 11,873,868 B2Horton, Inc.
- Cooling fan device5 Dec 2023US 11,833,883 B1Toyota Jidosha Kabushiki Kaisha
- Low solidity vehicle cooling fan26 Sep 2023US 11,767,761 B2Horton, Inc.
- Transmission device for driving a fan of a cooling circuit of an internal combustion engine, associated cooling circuit, and vehicle26 Jun 2025US 2025/0207526 A1Volvo Truck Corporation
- Valve Control System for Viscous Friction Clutch6 Jul 2023US 2023/0213072 A1Horton, Inc.
- Clutch device for a vehicle fan4 May 2023US 2023/0139344 A1Deere & Company
- Coolant pump for a vehicle21 Jul 2022US 2022/0228591 A1Baruffaldi S.p.A.
- System and method using fan control to assist vehicle braking12 May 2022US 2022/0145792 A1GM Global Technology Operations LLC
Most cited
By later US patents
- Automatic control valves579US 4,176,630 ADynair Limited · 1979
- Method for engine control43US 6,067,489 ADetroit Diesel Corporation · 2000
- Electric fan clutch38US 6,129,193 AAmerican Cooling Systems, LLC · 2000
- Spring engaged fluid released fan clutch for a live shaft34US 4,355,710 AHorton Industries, Inc. · 1982
- Rotational control apparatus32US 5,636,719 AHorton, Inc. · 1997