F04B 9/115
Reciprocating movement of the pumping members being obtained by two single-acting liquid
Official title: reciprocating movement of the pumping members being obtained by two single-acting liquid motors, each acting in one direction
F04B9/115 (Reciprocating movement of the pumping members being obtained by two single-acting liquid) appears on 69 US grants and 20 published applications in this corpus.
Search patents in F04B- Granted patents
- 69
- Published applications
- 20
- Assignees
- 40
- Inventors
- 86
- Latest grant
- 3 Jan 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 10 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 5 | 2 |
| 2003 | 2 | 2 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 2 |
| 2017 | 0 | 2 |
| 2018 | 2 | 0 |
| 2019 | 0 | 3 |
| 2020 | 2 | 1 |
| 2021 | 2 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Gas recirculation device and system having such a device3 Jan 2023US 11,542,935 B2Pfeiffer Vacuum GmbH
- Fluid dispensing apparatus and method30 Mar 2021US 10,961,992 B2Pentair Filtration Solutions, LLC
- Volumetric pump16 Feb 2021US 10,920,770 B2Goodrich Actuation Systems Limited
- Reciprocating pump16 Jun 2020US 10,683,856 B2Udiflow Limited
- Hydraulic system and method for providing fluid pressure to hydraulically-powered systems16 Jun 2020US 10,683,858 B1
- Gas recirculation device and system having such a device6 May 2021US 2021/0131440 A1Pfeiffer Vacuum GmbH
- Fluid dispensing apparatus and method12 Nov 2020US 2020/0355172 A1Pentair Filtration Solutions, LLC
- Fluid Dispensing Apparatus and Method18 Jul 2019US 2019/0219042 A1Pentair Filtration Solutions, LLC
- Volumetric pump10 Jan 2019US 2019/0010934 A1Goodrich Actuation Systems Limited
- A reciprocating pump10 Jan 2019US 2019/0010936 A1Udiflow Limited
Most cited
By later US patents
- Positive displacement hydraulic-drive reciprocating compressor111US 4,761,118 A1988
- Reverse osmosis filtering apparatus with concentrate dilution59US 6,299,766 B12001
- Double diaphragm operated reversing valve pump50US 4,386,888 AMcCann's Engineering and Manufacturing Co. · 1983
- Lubrication and sealing of a free floating piston of hydraulically driven gas compressor44US 4,390,322 A1983
- Hydraulic-pneumatic motor43US 5,819,533 A1998