F16D 2048/0212
Details of pistons for primary or secondary cylinders especially adapted for fluid
Official title: {Details of pistons for primary or secondary cylinders especially adapted for fluid control}
F16D2048/0212 (Details of pistons for primary or secondary cylinders especially adapted for fluid) appears on 215 US grants and 178 published applications in this corpus.
Search patents in F16D- Granted patents
- 215
- Published applications
- 178
- Assignees
- 106
- Inventors
- 456
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 7 |
| 2004 | 3 | 4 |
| 2005 | 2 | 7 |
| 2006 | 7 | 10 |
| 2007 | 7 | 5 |
| 2008 | 2 | 12 |
| 2009 | 2 | 18 |
| 2010 | 6 | 17 |
| 2011 | 12 | 10 |
| 2012 | 13 | 10 |
| 2013 | 14 | 12 |
| 2014 | 10 | 7 |
| 2015 | 11 | 8 |
| 2016 | 11 | 12 |
| 2017 | 4 | 6 |
| 2018 | 10 | 8 |
| 2019 | 5 | 8 |
| 2020 | 8 | 1 |
| 2021 | 4 | 2 |
| 2022 | 1 | 2 |
| 2023 | 2 | 2 |
| 2024 | 5 | 5 |
| 2025 | 2 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- Hydraulic clutch and work-vehicle travel power transmission apparatus including the hydraulic clutch18 Mar 2025US 12,253,118 B2Kubota Corporation
- Hydraulic fitting25 Feb 2025US 12,233,826 B2RIVA GmbH Engineering
- Dog clutch assembly, powertrain, and motor vehicle8 Oct 2024US 12,110,928 B2ZF Friedrichshafen AG
- Method for controlling a hydraulic unit in particular for a drivetrain of a motor vehicle, hydraulic unit and drivetrain with hydraulic unit25 Jun 2024US 12,018,747 B2Schaeffler Technologies AG & Co. KG
- 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
- Power system coupling of a multi-speed transmission to a prime mover21 May 2026US 2026/0139729 A1Allison Transmission, Inc.
- Clutch18 Dec 2025US 2025/0383014 A1Meritor Heavy Vehicle Systems Cameri SpA
- Clutch unit for reversibly coupling a drive side to an output side of a drive train, and actuator for a clutch unit of this type23 Oct 2025US 2025/0327494 A1Schaeffler Technologies AG & Co. KG
- Hydraulic fitting3 Oct 2024US 2024/0326765 A1Fahrwerker GmbH
Most cited
By later US patents
- Multiple disc clutch apparatus50US 4,862,769 AIsuzu Motors Limited · 1989
- Connector for modular prefilled hydraulic control apparatus45US 4,991,627 AAutomotive Products plc · 1991
- Hybrid system39US 8,545,367 B2Allison Transmission, Inc. · 2013
- Coaxial push rod and hollow screw ball nut drive for master cylinder38US 4,918,921 AAutomotive Products plc · 1990
- Clutch system37US 6,789,658 B2ZF Sachs AG · 2004