F04B 9/109
Having plural pumping chambers
Official title: having plural pumping chambers
F04B9/109 (Having plural pumping chambers) appears on 450 US grants and 339 published applications in this corpus.
Search patents in F04B- Granted patents
- 450
- Published applications
- 339
- Assignees
- 276
- Inventors
- 763
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 8 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 10 | 0 |
| 1984 | 10 | 0 |
| 1985 | 10 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 10 | 0 |
| 1989 | 8 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 13 | 0 |
| 1994 | 4 | 0 |
| 1995 | 9 | 0 |
| 1996 | 8 | 0 |
| 1997 | 8 | 0 |
| 1998 | 8 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 11 | 3 |
| 2002 | 11 | 7 |
| 2003 | 10 | 9 |
| 2004 | 4 | 6 |
| 2005 | 4 | 15 |
| 2006 | 4 | 7 |
| 2007 | 8 | 5 |
| 2008 | 4 | 11 |
| 2009 | 7 | 13 |
| 2010 | 3 | 10 |
| 2011 | 9 | 6 |
| 2012 | 2 | 7 |
| 2013 | 8 | 10 |
| 2014 | 3 | 14 |
| 2015 | 11 | 25 |
| 2016 | 8 | 18 |
| 2017 | 18 | 22 |
| 2018 | 21 | 23 |
| 2019 | 14 | 17 |
| 2020 | 26 | 20 |
| 2021 | 13 | 15 |
| 2022 | 10 | 16 |
| 2023 | 15 | 16 |
| 2024 | 14 | 19 |
| 2025 | 17 | 19 |
| 2026 | 14 | 6 |
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
- Method for operating a construction-material and/or viscous-material pump for conveying construction material and/or viscous material, and construction-material and/or viscous-material pump for conveying construction material and/or viscous material28 Jul 2026US 12,692,860 B2Putzmeister Engineering GmbH
- Hydraulic pump providing enhanced physical mobility7 Jul 2026US 12,673,334 B2
- Adding system for fire-extinguishing units26 May 2026US 12,636,532 B2Firedos GmbH
- Double acting pump25 Jun 2026US 2026/0177042 A1Mhwirth AS
- Gas supply pump for ship dual fuel engine21 May 2026US 2026/0139646 A1Hd Korea Shipbuilding & Offshore Engineering Co., Ltd.
- 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
- Displacement Power Controllers and Applications5 Mar 2026US 2026/0063150 A1Perisseuma Technologies LLC
Most cited
By later US patents
- Quadraplex fluid pump268US 4,470,771 ATowler Hydraulics, Inc. · 1984
- Pumping apparatus and pump control apparatus and method203US 4,990,058 AHaliburton Company · 1991
- Cassette system integrated apparatus195US 8,499,780 B2DEKA Products Limited Partnership · 2013
- Filtering and dispensing system with independently activated pumps in series161US 5,167,837 AFAS-Technologies, Inc. · 1992
- Sensor apparatus systems, devices and methods158US 8,491,184 B2DEKA Products Limited Partnership · 2013