F16D 2048/0281
Complex circuits with more than two valves in series or special arrangements
Official title: {Complex circuits with more than two valves in series or special arrangements thereof not provided for in previous groups}
F16D2048/0281 (Complex circuits with more than two valves in series or special arrangements) appears on 111 US grants and 82 published applications in this corpus.
Search patents in F16D- Granted patents
- 111
- Published applications
- 82
- Assignees
- 73
- Inventors
- 233
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 0 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 0 |
| 2005 | 1 | 4 |
| 2006 | 1 | 4 |
| 2007 | 2 | 5 |
| 2008 | 3 | 7 |
| 2009 | 3 | 7 |
| 2010 | 3 | 2 |
| 2011 | 3 | 8 |
| 2012 | 3 | 19 |
| 2013 | 7 | 8 |
| 2014 | 17 | 2 |
| 2015 | 7 | 3 |
| 2016 | 4 | 4 |
| 2017 | 7 | 2 |
| 2018 | 2 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pressure modulating clutch control assembly17 Mar 2026US 12,577,991 B2Caterpillar Inc.
- Clutch control device14 Dec 2021US 11,199,230 B2Isuzu Motors Limited
- Oil pressure supply system of automatic transmission10 Dec 2019US 10,502,315 B2Hyundai Motor Company
- Hydraulic control device for an automatic transmission12 Jun 2018US 9,995,384 B2ZF Friedrichshafen AG
- Hydraulic distribution system employing a dual pump22 May 2018US 9,976,576 B2Eaton Intelligent Power Limited
- Pressure modulating clutch control assembly18 Dec 2025US 2025/0382995 A1Caterpillar Inc.
- Clutch control device28 Jan 2021US 2021/0025461 A1Isuzu Motors Limited
- Dual-clutch actuator and drive assembly having such an actuator8 Oct 2020US 2020/0318730 A1FTE automotive GmbH
- Oil pressure supply system of automatic transmission25 Apr 2019US 2019/0120371 A1Hyundai Motor Company
- Hydraulic Circuit and Method for Controlling a Hydraulic Circuit23 Nov 2017US 2017/0335907 A1Avl Commercial Driveline & Tractor Engineering GmbH
Most cited
By later US patents
- Belt type continuous reduction gear mechanism147US 4,560,369 AHonda Giken Kogyo Kabushiki Kaisha · 1985
- Electronic control system for powershift transmission69US 4,855,913 AJ. I. Case Company · 1989
- Power transmission system for working vehicle40US 7,673,712 B2Kanzaki Kokyukoki Mfg.Co., Ltd. · 2010
- Electronic control system for powershift transmission38US 4,967,385 AJ. I. Case Company · 1990
- Clutch system37US 6,789,658 B2ZF Sachs AG · 2004