F16K 31/521
Comprising a pivoted disc or flap
Official title: {comprising a pivoted disc or flap}
F16K31/521 (Comprising a pivoted disc or flap) appears on 55 US grants and 59 published applications in this corpus.
Search patents in F16K- Granted patents
- 55
- Published applications
- 59
- Assignees
- 55
- Inventors
- 152
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 4 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 3 | 1 |
| 2013 | 2 | 5 |
| 2014 | 0 | 0 |
| 2015 | 3 | 3 |
| 2016 | 2 | 10 |
| 2017 | 4 | 8 |
| 2018 | 4 | 4 |
| 2019 | 6 | 1 |
| 2020 | 4 | 4 |
| 2021 | 6 | 6 |
| 2022 | 3 | 2 |
| 2023 | 2 | 1 |
| 2024 | 2 | 0 |
| 2025 | 1 | 5 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Crank for modular air valve system2 Jun 2026US 12,644,537 B2Hamilton Sundstrand Corporation
- Modular air valve system12 May 2026US 12,624,763 B2Hamilton Sundstrand Corporation
- Mixing valve capable of adjusting maximum discharge temperature11 Nov 2025US 12,467,553 B2Ing Tzon Co., Ltd.
- Aerial firefighting dump gate system25 Jun 2024US 12,017,773 B2
- A valve control mechanism2 Jul 2026US 2026/0185612 A1
- Electrically controlled throttle valve5 Mar 2026US 2026/0063218 A1Husqvarna AB
- Modular air valve system15 May 2025US 2025/0155026 A1Hamilton Sundstrand Corporation
- Modular air valve system15 May 2025US 2025/0155027 A1Hamilton Sundstrand Corporation
- Crank for modular air valve system15 May 2025US 2025/0155049 A1Hamilton Sundstrand Corporation
Most cited
By later US patents
- Combination check flow control and selector valve81US 4,109,670 A1978
- Flapper valves with hydrofoil and valve systems56US 11,306,835 B1KHOLLE Magnolia 2015, LLC · 2022
- Seed gate assembly for an agricultural product distribution system16US 10,337,645 B2CNH Industrial Canada, Ltd. · 2019
- Control device for a pivoting valve flap for a heating and/or air conditioning installation in a motor vehicle15US 5,797,585 AValeo Climatisation · 1998
- Gas flow diverter14US 5,299,601 AWahlco Engineered Products, Inc. · 1994