B21K 1/22
Poppet valves
Official title: poppet valves, e.g. for internal-combustion engines
B21K1/22 (Poppet valves) appears on 74 US grants and 72 published applications in this corpus.
Search patents in B21K- Granted patents
- 74
- Published applications
- 72
- Assignees
- 31
- Inventors
- 147
- Latest grant
- 1 Oct 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 3 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 2 | 3 |
| 2012 | 1 | 4 |
| 2013 | 2 | 4 |
| 2014 | 4 | 11 |
| 2015 | 8 | 6 |
| 2016 | 5 | 4 |
| 2017 | 6 | 6 |
| 2018 | 2 | 3 |
| 2019 | 5 | 1 |
| 2020 | 3 | 6 |
| 2021 | 0 | 9 |
| 2022 | 8 | 4 |
| 2023 | 7 | 3 |
| 2024 | 4 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Large-size diesel exhaust valve and manufacturing method thereof1 Oct 2024US 12,104,508 B1Cosco Shipping Marine Equipt & Spares (NJ) Co., Ltd.
- Hollow engine valve and production method thereof14 May 2024US 11,982,212 B2Fuji Oozx Inc.
- Method and device for manufacturing hollow, internally cooled valves13 Feb 2024US 11,898,473 B2Federal-Mogul Valvetrain GmbH
- Engine valve with raised ring or dimple30 Jan 2024US 11,885,246 B2Caterpillar Inc.
- Process and device for manufacturing hollow, internally cooled valves26 Dec 2023US 11,850,655 B2Federal-Mogul Valvetrain GmbH
- large-size diesel exhaust valve and manufacturing method thereof3 Oct 2024US 2024/0328333 A1Cosco Shipping Marine Equipment & Spares (Nanjing) Co.,Ltd
- Hollow engine valve and production method thereof9 Nov 2023US 2023/0358151 A1Fuji Oozx Inc.
- Engine valve and manufacturing method therefor1 Jun 2023US 2023/0167755 A1Fuji Oozx Inc.
- Method for Manufacturing Engine Poppet Valve19 Jan 2023US 2023/0017343 A1Nittan Company, Limited
- Method and device for manufacturing hollow, internally cooled valves22 Dec 2022US 2022/0403761 A1Federal-Mogul Valvetrain GmbH
Most cited
By later US patents
- Exhaust valve for an internal combustion engine, and a method of strengthening an annular valve seat area in an exhaust valve32US 10,443,456 B2Man Diesel & Turbo, Filial Af Man Diesel & Turbo SE, Tyskland · 2019
- Temperature control in an ultra light engine valve31US 5,458,314 AEaton Corporation · 1995
- Ultra light engine valve30US 5,413,073 AEaton Corporation · 1995
- Method of manufacturing hollow engine valve25US 5,056,219 AAisan Kogyo Kabushiki Kaisha · 1991
- Engine variable valve timing mechanism22US 5,724,929 AToyota Jidosha Kabushiki Kaisha · 1998