B21K 1/20
Valve parts
Official title: valve parts
B21K1/20 (Valve parts) appears on 204 US grants and 154 published applications in this corpus.
Search patents in B21K- Granted patents
- 204
- Published applications
- 154
- Assignees
- 109
- Inventors
- 399
- Latest grant
- 1 Oct 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 9 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 7 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 2 |
| 2002 | 5 | 4 |
| 2003 | 8 | 3 |
| 2004 | 1 | 10 |
| 2005 | 5 | 5 |
| 2006 | 10 | 5 |
| 2007 | 3 | 10 |
| 2008 | 2 | 4 |
| 2009 | 2 | 5 |
| 2010 | 5 | 3 |
| 2011 | 4 | 6 |
| 2012 | 4 | 7 |
| 2013 | 6 | 8 |
| 2014 | 5 | 13 |
| 2015 | 10 | 8 |
| 2016 | 6 | 6 |
| 2017 | 8 | 8 |
| 2018 | 3 | 5 |
| 2019 | 6 | 3 |
| 2020 | 8 | 10 |
| 2021 | 4 | 17 |
| 2022 | 12 | 7 |
| 2023 | 9 | 4 |
| 2024 | 7 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Large-size diesel exhaust valve and manufacturing method thereof1 Oct 2024US 12,104,508 B1Cosco Shipping Marine Equipt & Spares (NJ) Co., Ltd.
- Lined butterfly valve and method for manufacturing lined butterfly valve17 Sep 2024US 12,092,224 B2Kitz Corporation
- Method for producing a ductwork damper, ductwork damper, and ductwork damper unit incorporating same20 Aug 2024US 12,066,209 B2Capital Hardware Supply, LLC
- Hollow engine valve and production method thereof14 May 2024US 11,982,212 B2Fuji Oozx Inc.
- Check valve, air-conditioning apparatus, and method of manufacturing check valve30 Apr 2024US 11,969,774 B2Mitsubishi Electric Corporation
- 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
- Lined butterfly valve and method for manufacturing lined butterfly valve12 Jan 2023US 2023/0008981 A1Kitz Corporation
Most cited
By later US patents
- Method of manufacturing a valve sleeve86US 4,706,487 AJidosha Kiki Co., Ltd. · 1987
- Roller follower axle retention40US 4,628,874 AEaton Corporation · 1986
- Method of manufacturing a rocker arm40US 5,774,984 AKoyo Corporation · 1998
- Electric ball valve and manufacturing method therefor35US 11,131,397 B2Zhejiang Sanhua Climate and Appliance Controls Group Co., Ltd · 2021
- 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