F16K 15/1821
For check valves with a hinged or pivoted closure member
Official title: {for check valves with a hinged or pivoted closure member}
F16K15/1821 (For check valves with a hinged or pivoted closure member) appears on 101 US grants and 86 published applications in this corpus.
Search patents in F16K- Granted patents
- 101
- Published applications
- 86
- Assignees
- 80
- Inventors
- 216
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 3 | 4 |
| 2004 | 3 | 3 |
| 2005 | 0 | 2 |
| 2006 | 2 | 3 |
| 2007 | 1 | 2 |
| 2008 | 2 | 4 |
| 2009 | 4 | 1 |
| 2010 | 4 | 1 |
| 2011 | 1 | 4 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 0 | 6 |
| 2015 | 3 | 3 |
| 2016 | 5 | 2 |
| 2017 | 2 | 8 |
| 2018 | 4 | 8 |
| 2019 | 10 | 5 |
| 2020 | 3 | 8 |
| 2021 | 4 | 3 |
| 2022 | 9 | 4 |
| 2023 | 0 | 4 |
| 2024 | 5 | 3 |
| 2025 | 2 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Check valve having pivoting link29 Sep 2026US 12,747,799 B2Zurn Water, LLC
- Systems, methods, and apparatuses for mechanically securing a check valve in an open position during maintenance and testing operations1 Jul 2025US 12,343,580 B2
- Magnetic pressure retaining control device18 Feb 2025US 12,228,217 B2Shenzhen University
- Backwater valve31 Dec 2024US 12,180,695 B2
- Check valve with integral handle20 Aug 2024US 12,066,118 B2Hayward Industries, Inc.
- Flapper valve for aircraft engine18 Jun 2026US 2026/0168445 A1Pratt & Whitney Canada Corp.
- Break check valve26 Feb 2026US 2026/0055842 A1Mueller International, LLC
- Low water hammer break check valve2 Oct 2025US 2025/0305589 A1Mueller International, LLC
- Connector and movable object including the same11 Sep 2025US 2025/0282192 A1Hyundai Motor Company
- Check valve having pivoting link15 May 2025US 2025/0155038 A1Zurn Water, LLC
Most cited
By later US patents
- Check valve including means to permit selective back flow122US 5,819,791 AGulf Valve Company · 1998
- Flapper valves with hydrofoil and valve systems56US 11,306,835 B1KHOLLE Magnolia 2015, LLC · 2022
- Valve for inflatable objects51US 6,237,621 B12001
- Adjustable dishwasher conduit valve system49US 9,241,604 B2General Electric Company · 2016
- Method of testing the operability of check valves42US 4,618,824 AWestinghouse Electric Corp. · 1986