F01L 3/20
Shapes or constructions of valve members, not provided for in preceding subgroups
Official title: Shapes or constructions of valve members, not provided for in preceding subgroups of this group
F01L3/20 (Shapes or constructions of valve members, not provided for in preceding subgroups) appears on 427 US grants and 278 published applications in this corpus.
Search patents in F01L- Granted patents
- 427
- Published applications
- 278
- Assignees
- 166
- Inventors
- 732
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 7 | 0 |
| 1980 | 6 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 8 | 0 |
| 1989 | 9 | 0 |
| 1990 | 14 | 0 |
| 1991 | 14 | 0 |
| 1992 | 8 | 0 |
| 1993 | 8 | 0 |
| 1994 | 7 | 0 |
| 1995 | 8 | 0 |
| 1996 | 4 | 0 |
| 1997 | 12 | 0 |
| 1998 | 18 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 11 | 3 |
| 2002 | 7 | 15 |
| 2003 | 16 | 12 |
| 2004 | 12 | 11 |
| 2005 | 13 | 10 |
| 2006 | 7 | 7 |
| 2007 | 5 | 14 |
| 2008 | 9 | 9 |
| 2009 | 8 | 16 |
| 2010 | 6 | 11 |
| 2011 | 6 | 11 |
| 2012 | 11 | 10 |
| 2013 | 9 | 7 |
| 2014 | 6 | 13 |
| 2015 | 7 | 11 |
| 2016 | 7 | 14 |
| 2017 | 9 | 14 |
| 2018 | 15 | 13 |
| 2019 | 13 | 10 |
| 2020 | 13 | 17 |
| 2021 | 13 | 21 |
| 2022 | 20 | 8 |
| 2023 | 11 | 7 |
| 2024 | 4 | 8 |
| 2025 | 7 | 4 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus and method for machining valve seats30 Jun 2026US 12,669,073 B1Van Norman Machine India PVT LTD
- Tapered engine exhaust valve12 May 2026US 12,624,650 B2Caterpillar Inc.
- Poppet valve24 Feb 2026US 12,560,110 B2Eaton Intelligent Power Limited
- Hydrogen engine10 Feb 2026US 12,546,248 B2Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Hydrogen combustion engine and passenger car and commercial vehicle19 Aug 2025US 12,392,266 B2Mahle International GmbH
- Gas valve for an internal combustion engine23 Jul 2026US 2026/0210284 A1
- Valve bridge for a valve train of an internal combustion engine, especially of a motor vehicle, and internal combustion engine21 May 2026US 2026/0139613 A1Daimler Truck AG
- Tapered engine exhaust valve20 Nov 2025US 2025/0354504 A1Caterpillar Inc.
- Reed valve13 Nov 2025US 2025/0347346 A1Moto Tassinari, Inc.
- Electro-hydrostatic actuator4 Sep 2025US 2025/0277496 A1G. W. Lisk Company, Inc.
Most cited
By later US patents
- Internal combustion engine83US 6,279,550 B12001
- Harmonic engine70US 7,603,858 B2Lawrence Livermore National Security, LLC · 2009
- Cold air super-charged internal combustion engine, working cycle and method69US 6,951,211 B22005
- Non-circular poppet valves for internal combustion engine cylinder assemblies68US 4,790,272 A1988
- Passive valve assembly64US 6,883,775 B2innogy SE · 2005