F01L 1/245
Hydraulic tappets
F01L1/245 (Hydraulic tappets) appears on 420 US grants and 207 published applications in this corpus.
Search patents in F01L- Granted patents
- 420
- Published applications
- 207
- Assignees
- 111
- Inventors
- 534
- Latest grant
- 10 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 7 | 0 |
| 1984 | 14 | 0 |
| 1985 | 6 | 0 |
| 1986 | 14 | 0 |
| 1987 | 20 | 0 |
| 1988 | 12 | 0 |
| 1989 | 19 | 0 |
| 1990 | 6 | 0 |
| 1991 | 10 | 0 |
| 1992 | 12 | 0 |
| 1993 | 13 | 0 |
| 1994 | 9 | 0 |
| 1995 | 9 | 0 |
| 1996 | 7 | 0 |
| 1997 | 10 | 0 |
| 1998 | 7 | 0 |
| 1999 | 14 | 0 |
| 2000 | 10 | 0 |
| 2001 | 9 | 8 |
| 2002 | 8 | 10 |
| 2003 | 20 | 6 |
| 2004 | 1 | 9 |
| 2005 | 7 | 10 |
| 2006 | 14 | 22 |
| 2007 | 12 | 21 |
| 2008 | 18 | 15 |
| 2009 | 11 | 24 |
| 2010 | 10 | 3 |
| 2011 | 12 | 4 |
| 2012 | 3 | 2 |
| 2013 | 3 | 5 |
| 2014 | 5 | 3 |
| 2015 | 3 | 7 |
| 2016 | 3 | 6 |
| 2017 | 7 | 11 |
| 2018 | 10 | 11 |
| 2019 | 11 | 6 |
| 2020 | 10 | 9 |
| 2021 | 7 | 5 |
| 2022 | 9 | 6 |
| 2023 | 3 | 2 |
| 2024 | 1 | 0 |
| 2025 | 3 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- CDA lifter with hydraulic control feed from outside the engine block10 Jun 2025US 12,326,102 B2Eaton Intelligent Power Limited
- Lost motion variable valve actuation systems and method13 May 2025US 12,297,757 B2Jacobs Vehicle Systems, Inc.
- Multi-cylinder internal combustion engine, with cylinders equipped with intake valve variable actuation systems having hydraulic circuits which cross each other11 Mar 2025US 12,247,502 B2C. R. F. Societa Consortile per Azioni
- Rocker arm mechanism and engine assembly6 Feb 2024US 11,891,924 B2Weichai Power Co., Ltd.
- HLA arrangement using cold formed plunger and manufacturing simplifications19 Dec 2023US 11,846,211 B2Eaton Intelligent Power Limited
- Cda lifter with hydraulic control feed from outside the engine block20 Mar 2025US 2025/0092804 A1Eaton Intelligent Power Limited
- Multi-cylinder internal combustion engine, with cylinders equipped with intake valve variable actuation systems having hydraulic circuits which cross each other16 Jan 2025US 2025/0020072 A1C. R. F. Societa Consortile per Azioni
- Rocker arm mechanism and engine assembly19 Oct 2023US 2023/0332520 A1Weichai Power Co., Ltd.
- Two-step valve closing rocker assembly16 Mar 2023US 2023/0081789 A1
- Valve actuation system comprising in-series lost motion components deployed in a pre-rocker arm valve train component and valve bridge22 Sep 2022US 2022/0298935 A1Jacobs Vehicle Systems, Inc.
Most cited
By later US patents
- Arrangement for electromagnetically operated actuators68US 4,515,343 AFev Forschungsgesellschaft fur Energietechnik und ver Brennungsmotoren mbH · 1985
- Low mass two-step valve lifter52US 5,431,133 AGeneral Motors Corporation · 1995
- Controllable valve tappet for use with dual ramp cam49US 4,164,917 ACummins Engine Company, Inc. · 1979
- Valve control arrangement46US 4,671,221 ARobert Bosch GmbH · 1987
- Compact valve lifters45US 5,361,733 AGeneral Motors Corporation · 1994