F04B 53/141
Intermediate liquid piston between the driving piston and the pumped liquid
Official title: {Intermediate liquid piston between the driving piston and the pumped liquid (F04B43/06 and F04B43/10 take precedence)}
F04B53/141 (Intermediate liquid piston between the driving piston and the pumped liquid) appears on 20 US grants and 17 published applications in this corpus.
Search patents in F04B- Granted patents
- 20
- Published applications
- 17
- Assignees
- 24
- Inventors
- 55
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 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 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 2 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 2 |
| 2018 | 1 | 1 |
| 2019 | 2 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Pump, a homogenizer comprising said pump and a method for pumping a liquid product16 Oct 2018US 10,100,830 B2Tetra Laval Holdings & Finance S. A.
- Hydrogen store having a liquid piston10 Sep 2026US 2026/0266279 A1Maximator GmbH
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- Mechanical liquid piston slow expansion compressor17 Oct 2024US 2024/0344508 A1
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Most cited
By later US patents
- Fluid pumping system based on electrochemically-induced surface tension changes46US 5,472,577 AIowa State University Research Foundation, Inc. · 1995
- High pressure slurry piston pump27US 7,118,349 B22006
- Piston pump11US 4,527,957 AUraca Pumpenfabrik GmbH & Co. KG · 1985
- Apparatus and method for pumping hot, erosive slurry of coal solids in coal derived, water immiscible liquid7US 4,378,183 AThe Pittsburgh & Midway Coal Mining Co. · 1983
- Syringes adapted to overcome a pressure resistance4US 4,113,144 A1978