F04B 9/111
With two mechanically connected pumping members
Official title: with two mechanically connected pumping members
F04B9/111 (With two mechanically connected pumping members) appears on 227 US grants and 159 published applications in this corpus.
Search patents in F04B- Granted patents
- 227
- Published applications
- 159
- Assignees
- 154
- Inventors
- 377
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 10 | 0 |
| 1984 | 6 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 1 |
| 2002 | 6 | 5 |
| 2003 | 5 | 6 |
| 2004 | 3 | 4 |
| 2005 | 1 | 7 |
| 2006 | 2 | 4 |
| 2007 | 3 | 1 |
| 2008 | 2 | 6 |
| 2009 | 2 | 6 |
| 2010 | 1 | 5 |
| 2011 | 6 | 3 |
| 2012 | 1 | 4 |
| 2013 | 3 | 7 |
| 2014 | 2 | 7 |
| 2015 | 4 | 5 |
| 2016 | 4 | 9 |
| 2017 | 3 | 10 |
| 2018 | 7 | 14 |
| 2019 | 10 | 8 |
| 2020 | 14 | 6 |
| 2021 | 8 | 11 |
| 2022 | 6 | 7 |
| 2023 | 4 | 5 |
| 2024 | 7 | 10 |
| 2025 | 8 | 6 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fluid pump assembly6 Oct 2026US 12,753,748 B2
- Multi-phase fluid pump system with driving fluid and pump fluid cylinders and buffer chambers22 Sep 2026US 12,742,449 B2I-Jack Technologies Incorporated
- Membrane pump device19 May 2026US 12,631,171 B2J. Wagner GmbH
- Reciprocating pump power end with monolithic core27 Jan 2026US 12,535,069 B2Gd Energy Products, LLC
- Common plunger for a linear actuated pump13 Jan 2026US 12,523,203 B2Bosch Rexroth AG
- Reciprocating pump power end with monolithic core21 May 2026US 2026/0139668 A1Gd Energy Products, LLC
- Gas compressor and system and method for gas compressing19 Mar 2026US 2026/0078751 A1I-Jack Technologies Incorporated
- Reciprocating pump power end with monolithic core25 Dec 2025US 2025/0389269 A1Gd Energy Products, LLC
- Process pumps and related methods of treating a process line30 Oct 2025US 2025/0334109 A1Saudi Arabian Oil Company
- System of pressure intensifier units, method of controlling same and relevant computer program, and press apparatus comprising said system28 Aug 2025US 2025/0269620 A1Quintus Technologies AB
Most cited
By later US patents
- Pumping apparatus and pump control apparatus and method203US 4,990,058 AHaliburton Company · 1991
- Positive displacement hydraulic-drive reciprocating compressor111US 4,761,118 A1988
- Hydraulically powered compressor and hydraulic control and power system therefor90US 4,653,986 ATidewater Compression Service, Inc. · 1987
- Integrated pumping and/or energy recovery system64US 6,017,200 AScience Applications International Corporation · 2000
- Method of and apparatus for transporting fluid substances63US 4,229,143 ANikex Nehezipari Kulkereskedelmi Vallalat · 1980