F04B 9/1095
Having two or more pumping chambers in series
Official title: {having two or more pumping chambers in series}
F04B9/1095 (Having two or more pumping chambers in series) appears on 33 US grants and 35 published applications in this corpus.
Search patents in F04B- Granted patents
- 33
- Published applications
- 35
- Assignees
- 24
- Inventors
- 44
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 3 |
| 2010 | 0 | 3 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 5 |
| 2015 | 4 | 2 |
| 2016 | 2 | 1 |
| 2017 | 2 | 1 |
| 2018 | 2 | 2 |
| 2019 | 2 | 5 |
| 2020 | 4 | 2 |
| 2021 | 1 | 2 |
| 2022 | 2 | 1 |
| 2023 | 2 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Intensification system and method3 Feb 2026US 12,540,631 B2Kraft Werks Group, LLC
- Reciprocating pump power end with monolithic core27 Jan 2026US 12,535,069 B2Gd Energy Products, LLC
- Hydraulically actuated pump for fluid administration9 May 2023US 11,642,456 B2MannKind Corporation
- Method and apparatus for producing well fluids25 Apr 2023US 11,634,975 B2Liquid Rod Lift, LLC
- Downhole pump and method for producing well fluids26 Jul 2022US 11,396,798 B2Liquid Rod Lift, LLC
- Reciprocating pump power end with monolithic core21 May 2026US 2026/0139668 A1Gd Energy Products, LLC
- Reciprocating pump power end with monolithic core25 Dec 2025US 2025/0389269 A1Gd Energy Products, LLC
- Intensification system and method27 Feb 2025US 2025/0067283 A1Kraft Werks Group, LLC
- Energy efficiency increasing system for hydraulic devices30 Jun 2022US 2022/0205462 A1
- Downhole pump and method for producing well fluids4 Mar 2021US 2021/0062626 A1Liquid Rod Lift, LLC
Most cited
By later US patents
- Filtering and dispensing system with independently activated pumps in series161US 5,167,837 AFAS-Technologies, Inc. · 1992
- Fluid dispensing system124US 5,516,429 AFAStar, Ltd. · 1996
- Positive displacement hydraulic-drive reciprocating compressor111US 4,761,118 A1988
- Positive displacement pump and operating method thereof90US 9,695,808 B2Mhwirth AS · 2017
- Hydraulically actuated pump for long duration medicament administration74US 7,530,968 B2Valeritas, Inc. · 2009