F04B 53/1037
Flap valves
Official title: {Flap valves}
F04B53/1037 (Flap valves) appears on 326 US grants and 271 published applications in this corpus.
Search patents in F04B- Granted patents
- 326
- Published applications
- 271
- Assignees
- 216
- Inventors
- 621
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 10 | 0 |
| 1993 | 5 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 8 | 0 |
| 2000 | 7 | 0 |
| 2001 | 6 | 0 |
| 2002 | 2 | 8 |
| 2003 | 4 | 2 |
| 2004 | 1 | 8 |
| 2005 | 4 | 7 |
| 2006 | 4 | 15 |
| 2007 | 9 | 6 |
| 2008 | 1 | 9 |
| 2009 | 4 | 4 |
| 2010 | 7 | 6 |
| 2011 | 4 | 10 |
| 2012 | 5 | 7 |
| 2013 | 6 | 12 |
| 2014 | 6 | 7 |
| 2015 | 12 | 10 |
| 2016 | 2 | 16 |
| 2017 | 8 | 12 |
| 2018 | 16 | 23 |
| 2019 | 13 | 14 |
| 2020 | 21 | 14 |
| 2021 | 13 | 17 |
| 2022 | 11 | 21 |
| 2023 | 18 | 11 |
| 2024 | 18 | 12 |
| 2025 | 9 | 11 |
| 2026 | 8 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tuned micro check valves and pumps15 Sep 2026US 12,736,044 B2Q T Flow Ltd
- Radial piston pump, and process for manufacturing a radial piston pump11 Aug 2026US 12,704,123 B2thyssenkrupp AG
- Alternative compressor head arrangement28 Jul 2026US 12,692,861 B2Nidec Global Applicance Brasil Ltda.
- Balanced pressure seal for high pressure pumps2 Jun 2026US 12,644,451 B2Wanner Engineering, Inc.
- Compact multi-chamber foam-at-a-distance pumps and dispensers5 May 2026US 12,616,342 B2GOJO Industries, Inc.
- A flap valve magnetorheological micropump8 Oct 2026US 2026/0309144 A1Georgia Southern University Research and Service Foundation, Inc.
- Diaphragm pump, liquid ejection head and liquid ejection apparatus17 Sep 2026US 2026/0273948 A1
- Pump for hvac&r system13 Aug 2026US 2026/0235114 A1Tyco Fire & Security GmbH
- Diaphragm Pump23 Jul 2026US 2026/0210347 A1Cytiva Sweden AB
- Fluid driving mechanism2 Jul 2026US 2026/0185515 A1TDK Taiwan Corp.
Most cited
By later US patents
- Membrane pump with stretchable pump membrane348US 6,948,918 B2Novo Nordisk A/S · 2005
- Micropump316US 5,759,014 AWestonbridge International Limited · 1998
- Micro-miniaturized, electrostatically driven diaphragm micropump246US 5,529,465 AFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. · 1996
- Apparatus for pumping fluid at a steady flow rate244US 5,921,951 ATherakos, Inc. · 1999
- Cassette system integrated apparatus195US 8,499,780 B2DEKA Products Limited Partnership · 2013