F01L 2820/033
Hydraulic engines
F01L2820/033 (Hydraulic engines) appears on 76 US grants and 97 published applications in this corpus.
Search patents in F01L- Granted patents
- 76
- Published applications
- 97
- Assignees
- 41
- Inventors
- 186
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 4 |
| 2006 | 3 | 1 |
| 2007 | 0 | 5 |
| 2008 | 2 | 4 |
| 2009 | 1 | 4 |
| 2010 | 2 | 6 |
| 2011 | 9 | 7 |
| 2012 | 3 | 6 |
| 2013 | 3 | 6 |
| 2014 | 7 | 4 |
| 2015 | 4 | 1 |
| 2016 | 1 | 5 |
| 2017 | 3 | 6 |
| 2018 | 5 | 4 |
| 2019 | 3 | 10 |
| 2020 | 4 | 5 |
| 2021 | 6 | 6 |
| 2022 | 4 | 1 |
| 2023 | 5 | 4 |
| 2024 | 4 | 6 |
| 2025 | 4 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Switchable rocker arm15 Jul 2025US 12,359,592 B2Eaton Intelligent Power Limited
- Valve timing changing device3 Jun 2025US 12,320,278 B2Mikuni Corporation
- Actuation system for an internal combustion engine4 Mar 2025US 12,241,390 B2Board of Trustees of Michigan State University
- Camshaft adjuster with reset function25 Feb 2025US 12,234,754 B2Schaeffler Technologies AG & Co. KG
- Switchable rocker arm12 Nov 2024US 12,140,056 B2Eaton Intelligent Power Limited
- Switchable rocker arm18 Dec 2025US 2025/0382904 A1Eaton Intelligent Power Limited
- Switchable rocker arm26 Dec 2024US 2024/0426228 A1Eaton Intelligent Power Limited
- Camshaft adjuster with reset function26 Dec 2024US 2024/0426229 A1Schaeffler Technologies AG & Co. KG
- Valve timing changing device28 Nov 2024US 2024/0392706 A1Mikuni Corporation
- Rocker arm with outwardly sprung hydraulic actuator piston22 Aug 2024US 2024/0280036 A1
Most cited
By later US patents
- Valve mechanism for an automotive engine55US 4,768,475 AFuji Jukogyo Kabushiki Kaisha · 1988
- Internal combustion engine35US 7,559,298 B2Cleeves Engines Inc. · 2009
- Systems, methods, and devices for valve stem position sensing34US 9,284,859 B2Eaton Corporation · 2016
- Variable valve event engine30US 4,354,460 AToyota Jidosha Kogyo Kabushiki Kaisha · 1982
- Variable valve lift apparatus30US 8,464,677 B2Hyundai Motor Company · 2013