F04F 1/02
Pumps using positively or negatively pressurised fluid medium acting directly on the
Official title: using both positively and negatively pressurised fluid medium, e.g. alternating
F04F1/02 (Pumps using positively or negatively pressurised fluid medium acting directly on the) appears on 100 US grants and 75 published applications in this corpus.
Search patents in F04F- Granted patents
- 100
- Published applications
- 75
- Assignees
- 71
- Inventors
- 179
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 3 |
| 2004 | 3 | 3 |
| 2005 | 1 | 5 |
| 2006 | 4 | 3 |
| 2007 | 1 | 4 |
| 2008 | 1 | 2 |
| 2009 | 1 | 5 |
| 2010 | 2 | 1 |
| 2011 | 3 | 3 |
| 2012 | 3 | 3 |
| 2013 | 1 | 3 |
| 2014 | 1 | 3 |
| 2015 | 3 | 3 |
| 2016 | 1 | 6 |
| 2017 | 6 | 2 |
| 2018 | 3 | 2 |
| 2019 | 0 | 5 |
| 2020 | 5 | 4 |
| 2021 | 1 | 4 |
| 2022 | 1 | 1 |
| 2023 | 3 | 3 |
| 2024 | 8 | 0 |
| 2025 | 1 | 3 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Motionless molten salt pump on leverage of pressure variation force10 Feb 2026US 12,546,337 B2UNM Rainforest Innovations
- Oxyhydrogen pulse and rotary detonation combustion pump7 Jan 2025US 12,188,490 B2
- Heat activated multiphase fluid-operated pump for motor temperature control12 Nov 2024US 12,142,749 B1Hamfop Technologies LLC
- Heat-activated pump with integrated evaporator for electronic chip heat removal29 Oct 2024US 12,133,363 B1Hamfop Technologies LLC
- Fluid control3 Sep 2024US 12,076,720 B2LumiraDx UK Ltd.
- Device for transport and treatment of liquid20 Aug 2026US 2026/0241347 A1Searas AS
- Pneumatic pump control system13 Aug 2026US 2026/0235141 A1Jpc Holdings, LLC
- Flood Restoration System and Method1 Jan 2026US 2026/0000254 A1
- Oxyhydrogen Pulse and Rotary Detonation Combustion Pump4 Dec 2025US 2025/0369454 A1
- Motionless Molten Salt Pump on Leverage of Pressure Variation Force12 Jun 2025US 2025/0188955 A1UNM Rainforest Innovations
Most cited
By later US patents
- Gas pump for stirring molten metal107US 4,355,789 A1982
- Pump for transferring particulate material38US 7,241,080 B2Durr Industries, Inc. · 2007
- Air operated vacuum pump36US 5,007,803 AGlobal Pumps, Inc. · 1991
- Fluid displacement system33US 6,042,342 AT.D.I. --Thermo Dynamics Israel Ltd. · 2000
- Pneumatic method and apparatus for circulating liquids31US 4,408,960 ALogic Devices, Inc. · 1983