F04F 1/00
Pumps using positively or negatively pressurised fluid medium acting directly on the
Official title: Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped (using only negative pressure F04F3/00; jet pumps F04F5/00; siphons F04F10/00)
F04F1/00 (Pumps using positively or negatively pressurised fluid medium acting directly on the) appears on 533 US grants and 355 published applications in this corpus.
Search patents in F04F- Granted patents
- 533
- Published applications
- 355
- Assignees
- 288
- Inventors
- 873
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 9 | 0 |
| 1978 | 14 | 0 |
| 1979 | 6 | 0 |
| 1980 | 6 | 0 |
| 1981 | 9 | 0 |
| 1982 | 14 | 0 |
| 1983 | 12 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 7 | 0 |
| 1988 | 7 | 0 |
| 1989 | 7 | 0 |
| 1990 | 4 | 0 |
| 1991 | 13 | 0 |
| 1992 | 8 | 0 |
| 1993 | 8 | 0 |
| 1994 | 11 | 0 |
| 1995 | 8 | 0 |
| 1996 | 11 | 0 |
| 1997 | 10 | 0 |
| 1998 | 8 | 0 |
| 1999 | 10 | 0 |
| 2000 | 14 | 0 |
| 2001 | 19 | 2 |
| 2002 | 8 | 8 |
| 2003 | 17 | 13 |
| 2004 | 11 | 10 |
| 2005 | 6 | 13 |
| 2006 | 11 | 13 |
| 2007 | 5 | 13 |
| 2008 | 5 | 15 |
| 2009 | 7 | 11 |
| 2010 | 7 | 6 |
| 2011 | 10 | 10 |
| 2012 | 8 | 14 |
| 2013 | 7 | 14 |
| 2014 | 10 | 12 |
| 2015 | 8 | 15 |
| 2016 | 7 | 16 |
| 2017 | 13 | 13 |
| 2018 | 16 | 22 |
| 2019 | 16 | 24 |
| 2020 | 23 | 26 |
| 2021 | 19 | 24 |
| 2022 | 20 | 15 |
| 2023 | 13 | 17 |
| 2024 | 24 | 9 |
| 2025 | 12 | 12 |
| 2026 | 7 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System for dropping a liquid25 Aug 2026US 12,715,011 B2Centre National de la Recherche Scientifique (CNRS)
- Floatless pumps and control systems21 Apr 2026US 12,607,105 B2Nextech Environmental, LLC
- Looping water device3 Mar 2026US 12,565,872 B1Yu Ding Enterprise Co., Ltd
- Fluid flow converter with support arrangement10 Feb 2026US 12,546,297 B2Enairon AB
- Fluid flow converter with interstage flow channel10 Feb 2026US 12,546,298 B2Enairon AB
- Device for transport and treatment of liquid20 Aug 2026US 2026/0241347 A1Searas AS
- Pneumatic pump control system13 Aug 2026US 2026/0235141 A1Jpc Holdings, LLC
- Pneumatic Pump Cycle Counter25 Jun 2026US 2026/0176959 A1Shady Grove Road Investments, LLC
- Gas sparger head for airlift geothermal systems28 May 2026US 2026/0146517 A1West Virginia University Board of Governors on Behaft of West Virginia University
- Looping water device19 Mar 2026US 2026/0078732 A1Yu Ding Enterprise Co., Ltd
Most cited
By later US patents
- Gas pump for stirring molten metal107US 4,355,789 A1982
- Cleaning and preservation unit for turbine engine101US 4,059,123 AAvco Corporation · 1977
- Automated system for rinsing a fluid line of a medical system98US 6,206,014 B1American Optisurgical Incorporated · 2001
- Method for dispensing a solution97US 6,659,117 B2E-Z Flo Injection Systems, Inc. · 2003
- Gas operated pump for hydrocarbon wells90US 6,973,973 B2Weatherford/Lamb, Inc. · 2005