F16D 48/02
Control by fluid pressure
F16D48/02 (Control by fluid pressure) appears on 1,330 US grants and 1,084 published applications in this corpus.
Search patents in F16D- Granted patents
- 1,330
- Published applications
- 1,084
- Assignees
- 382
- Inventors
- 2,350
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 8 | 0 |
| 1978 | 14 | 0 |
| 1979 | 6 | 0 |
| 1980 | 11 | 0 |
| 1981 | 12 | 0 |
| 1982 | 6 | 0 |
| 1983 | 12 | 0 |
| 1984 | 13 | 0 |
| 1985 | 20 | 0 |
| 1986 | 27 | 0 |
| 1987 | 30 | 0 |
| 1988 | 12 | 0 |
| 1989 | 18 | 0 |
| 1990 | 18 | 0 |
| 1991 | 25 | 0 |
| 1992 | 20 | 0 |
| 1993 | 8 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 11 | 0 |
| 1997 | 8 | 0 |
| 1998 | 8 | 0 |
| 1999 | 11 | 0 |
| 2000 | 17 | 0 |
| 2001 | 14 | 15 |
| 2002 | 29 | 12 |
| 2003 | 25 | 21 |
| 2004 | 17 | 33 |
| 2005 | 24 | 40 |
| 2006 | 38 | 48 |
| 2007 | 28 | 34 |
| 2008 | 21 | 59 |
| 2009 | 21 | 80 |
| 2010 | 30 | 45 |
| 2011 | 48 | 54 |
| 2012 | 45 | 54 |
| 2013 | 56 | 64 |
| 2014 | 68 | 55 |
| 2015 | 73 | 56 |
| 2016 | 50 | 61 |
| 2017 | 63 | 60 |
| 2018 | 57 | 60 |
| 2019 | 55 | 52 |
| 2020 | 68 | 50 |
| 2021 | 38 | 33 |
| 2022 | 34 | 26 |
| 2023 | 29 | 25 |
| 2024 | 26 | 27 |
| 2025 | 19 | 11 |
| 2026 | 9 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F16D 2048/0257Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangementIndexing code394
- F16D 2048/0221Valves for clutch control systemsIndexing code339
- F16D 48/0206In a system with a plurality of fluid-actuated clutches232
- F16D 2048/0227Source of pressure producing the clutch engagement or disengagement action within aIndexing code226
- F16D 2048/0209Characterised by fluid valves having control pistonsIndexing code220
- F16D 2048/0212Details of pistons for primary or secondary cylinders especially adapted for fluidIndexing code215
- F16D 48/04Providing power assistance198
- F16D 2048/0224Details of conduits, connectors or the adaptors therefor specially adapted for clutchIndexing code106
Recent patents
- Clutch unit for reversibly coupling a drive side to an output side of a drive train, and actuator for a clutch unit of this type9 Jun 2026US 12,650,151 B2Schaeffler Technologies AG & Co. KG
- Travel control device, travel control method, and storage medium storing travel control program5 May 2026US 12,617,406 B2J-QuAD DYNAMICS INC.
- System and method for calibrating transmission5 May 2026US 12,618,466 B2Dana Belgium N.V.
- Clutch system7 Apr 2026US 12,595,827 B2Isuzu Motors Limited
- Pressure modulating clutch control assembly17 Mar 2026US 12,577,991 B2Caterpillar Inc.
- Hydraulic system, hybrid transmission, and vehicle10 Sep 2026US 2026/0266342 A1Chery Automobile Co., Ltd.
- Clutch unit for reversibly coupling a drive side to an output side of a drive train27 Aug 2026US 2026/0251187 A1Schaeffler Technologies AG & Co. KG
- High-pressure hydraulic clutch cooling system for work vehicles30 Jul 2026US 2026/0218761 A1Deere & Company
- Arrangement and method for requirement-based distribution of cooling/lubricating oil flows in electric traction drives23 Jul 2026US 2026/0213619 A1MAGNA Powertrain AG & Co KG
- Actuating device for a vehicle9 Jul 2026US 2026/0194078 A1Hyundai Motor Company
Most cited
By later US patents
- Hydraulic circuit for automatic transmission1,004US 9,488,197 B2Hyundai Motor Company · 2016
- Dynamic clutch control885US 6,799,669 B2Siemens VDO Automotive Corporation · 2004
- Belt type continuous reduction gear mechanism147US 4,560,369 AHonda Giken Kogyo Kabushiki Kaisha · 1985
- Closed-system electrohydraulic actuator93US 7,051,526 B2Moog Inc. · 2006
- Slip control system for a clutch85US 4,468,988 AMitsubishi Jidosha Kogyo Kabushiki Kaisha · 1984