F04D 17/18
Characterised by use of centrifugal force of liquids entrained in pumps
Official title: characterised by use of centrifugal force of liquids entrained in pumps {(, e.g. by means of an auxiliary liquid; fluid ring compressors F04C19/00)}
F04D17/18 (Characterised by use of centrifugal force of liquids entrained in pumps) appears on 18 US grants and 15 published applications in this corpus.
Search patents in F04D- Granted patents
- 18
- Published applications
- 15
- Assignees
- 13
- Inventors
- 28
- Latest grant
- 26 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 2 |
| 2019 | 1 | 2 |
| 2020 | 0 | 1 |
| 2021 | 3 | 1 |
| 2022 | 0 | 4 |
| 2023 | 4 | 2 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Multi-phase rotor, system and method for maintaining a stable vapour cavity26 Aug 2025US 12,398,725 B2Cre 8 Technologies Limited
- Gas compressor with reduced energy loss5 Dec 2023US 11,835,067 B2Carnot Compression Inc.
- Gas compressor with reduced energy loss15 Aug 2023US 11,725,672 B2Carnot Compression Inc.
- Pump having liquid blades and an associated method of pumping8 Aug 2023US 11,719,244 B2Edwards Limited
- Centrifugal air compressor and control7 Feb 2023US 11,572,882 B2Pecheanu Air Compressors Inc.
- A Multi-Phase Rotor, System and Method for Maintaining a Stable Vapour Cavity16 Jan 2025US 2025/0020136 A1Cre 8 Technologies Limited
- Air extractor23 Nov 2023US 2023/0375007 A1Zhejiang University
- Liquid blade pump21 Sep 2023US 2023/0296095 A1
- Centrifugal Air Compressor and Control25 Aug 2022US 2022/0268286 A1Pecheanu Air Compressors Inc.
- Gas compressor with reduced energy loss21 Jul 2022US 2022/0228604 A1Carnot Cmpression Inc.
Most cited
By later US patents
- Gas compression system17US 4,311,025 ANatural Energy Systems · 1982
- Pump employing the suction effect of a rotating liquid ring10US 4,626,176 AGenevac Limited · 1986
- Centrifugal gas compressor method and system8US 9,618,013 B2Rotational Trompe Compressors, LLC · 2017
- Compressor7US 4,074,954 AMobil Oil Corporation · 1978
- Gas compressor with reduced energy loss5US 11,209,023 B2Carnot Compression Inc. · 2021