F01L 1/181
Centre pivot rocking arms
Official title: {Centre pivot rocking arms}
F01L1/181 (Centre pivot rocking arms) appears on 1,174 US grants and 1,048 published applications in this corpus.
Search patents in F01L- Granted patents
- 1,174
- Published applications
- 1,048
- Assignees
- 289
- Inventors
- 1,769
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 8 | 0 |
| 1985 | 13 | 0 |
| 1986 | 13 | 0 |
| 1987 | 11 | 0 |
| 1988 | 19 | 0 |
| 1989 | 13 | 0 |
| 1990 | 14 | 0 |
| 1991 | 13 | 0 |
| 1992 | 11 | 0 |
| 1993 | 12 | 0 |
| 1994 | 15 | 0 |
| 1995 | 10 | 0 |
| 1996 | 18 | 0 |
| 1997 | 18 | 0 |
| 1998 | 15 | 0 |
| 1999 | 13 | 0 |
| 2000 | 8 | 0 |
| 2001 | 20 | 12 |
| 2002 | 23 | 27 |
| 2003 | 29 | 29 |
| 2004 | 29 | 36 |
| 2005 | 30 | 56 |
| 2006 | 34 | 34 |
| 2007 | 29 | 42 |
| 2008 | 29 | 40 |
| 2009 | 30 | 57 |
| 2010 | 26 | 31 |
| 2011 | 23 | 36 |
| 2012 | 32 | 41 |
| 2013 | 34 | 35 |
| 2014 | 33 | 27 |
| 2015 | 35 | 20 |
| 2016 | 22 | 37 |
| 2017 | 30 | 67 |
| 2018 | 41 | 60 |
| 2019 | 59 | 56 |
| 2020 | 75 | 60 |
| 2021 | 54 | 55 |
| 2022 | 60 | 44 |
| 2023 | 33 | 37 |
| 2024 | 47 | 48 |
| 2025 | 52 | 39 |
| 2026 | 17 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Variable displacement valvetrain systems with rocker shaft porting and insert sleeves for engine cylinder deactivation22 Sep 2026US 12,742,403 B2GM Global Technology Operations LLC
- Valve bridge for a valve train of an internal combustion engine, especially of a motor vehicle, and internal combustion engine4 Aug 2026US 12,698,731 B2Daimler Truck AG
- Hydraulic capsule for variable valve actuation4 Aug 2026US 12,698,732 B2Eaton Intelligent Power Limited
- Switchable rocker arm14 Jul 2026US 12,680,480 B2Eaton Intelligent Power Limited
- Rocker arm system for an internal combustion engine valvetrain14 Jul 2026US 12,680,481 B2Manton Pushrods, LLC
- Valve bridge anti-dislodgement structures1 Oct 2026US 2026/0298114 A1Eaton Intelligent Power Limited
- Valve operating system17 Sep 2026US 2026/0275886 A1Isuzu Motors Limited
- Roller hydraulic valve lifter bearing10 Sep 2026US 2026/0266204 A1Roller Bearing Company of America, Inc.
- Engine13 Aug 2026US 2026/0235053 A1Ishikawa Energy Research Co., Ltd.
- Engine braking device with returning and limiting functions and engine30 Jul 2026US 2026/0218633 A1Zhejiang Liming Intelligent Manufacturing Co., Ltd.
Most cited
By later US patents
- Premixed charge compression ignition engine with optimal combustion control196US 6,276,334 B1Cummins Engine Company, Inc. · 2001
- Internal combustion engines with combined cam and electro-hydraulic engine valve control86US 5,680,841 ADiesel Engine Retarders, Inc. · 1997
- System and method for controlling the amount of lost motion between an engine valve and a valve actuation means83US 5,829,397 ADiesel Engine Retarders, Inc. · 1998
- Electromagnetically operating setting device76US 5,131,624 AFEV Motorentechnik GmbH · 1992
- Variable compression ratio engine74US 5,682,854 AKomatsu Ltd. · 1997