F04B 9/103
Having only one pumping chamber
Official title: having only one pumping chamber
F04B9/103 (Having only one pumping chamber) appears on 329 US grants and 243 published applications in this corpus.
Search patents in F04B- Granted patents
- 329
- Published applications
- 243
- Assignees
- 203
- Inventors
- 548
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 6 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 8 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 8 | 0 |
| 1989 | 8 | 0 |
| 1990 | 2 | 0 |
| 1991 | 9 | 0 |
| 1992 | 9 | 0 |
| 1993 | 10 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 9 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 0 |
| 2002 | 6 | 4 |
| 2003 | 4 | 3 |
| 2004 | 4 | 6 |
| 2005 | 0 | 13 |
| 2006 | 2 | 3 |
| 2007 | 4 | 6 |
| 2008 | 4 | 11 |
| 2009 | 4 | 9 |
| 2010 | 3 | 7 |
| 2011 | 9 | 6 |
| 2012 | 5 | 5 |
| 2013 | 8 | 9 |
| 2014 | 2 | 12 |
| 2015 | 9 | 14 |
| 2016 | 10 | 13 |
| 2017 | 5 | 22 |
| 2018 | 10 | 20 |
| 2019 | 15 | 14 |
| 2020 | 20 | 17 |
| 2021 | 15 | 9 |
| 2022 | 8 | 7 |
| 2023 | 10 | 4 |
| 2024 | 9 | 17 |
| 2025 | 6 | 9 |
| 2026 | 8 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for reducing wear in a reciprocating piston pump11 Aug 2026US 12,704,135 B2Spotton Corp.
- Cyclic aspiration system with a non-powered internal structural impediment engaging with a clot assisting in capture26 May 2026US 12,636,421 B2Neuravi Limited
- Piston coupler for a reciprocating pump28 Apr 2026US 12,612,902 B2Wagner Spray Tech Corporation
- Aspiration vacuum source7 Apr 2026US 12,594,371 B2Neuravi Limited
- Cyclic aspiration system producing cyclic aspiration pressure waveform using vacuum pump and positive pressure pulse generator mechanism31 Mar 2026US 12,589,198 B2Neuravi Limited
- Aspiration vacuum source13 Aug 2026US 2026/0232889 A1Neuravi Limited
- Proportional volumetric dosing device30 Jul 2026US 2026/0219086 A1Mixtron S.R.L.
- Asymmetric ram piston for intensifier2 Jul 2026US 2026/0185511 A1KMT Waterjet Systems Inc.
- Cryogenic pump with designed leakby for hydrogen fueling station16 Oct 2025US 2025/0320855 A1Bosch Rexroth AG
- Direct control variable displacement pump with dual-function high-pressure relief valve-pressure regulating valve28 Aug 2025US 2025/0270961 A1Hamilton Sundstrand Corporation
Most cited
By later US patents
- Pump assembly228US 3,966,358 AMedac Gesellschaft FüR Klinische SpezialpräParate Mbh · 1976
- Multi-station semiconductor processor with volatilization138US 5,377,708 ASemitool, Inc. · 1995
- Semiconductor processor apparatus with dynamic wafer vapor treatment and particulate volatilization97US 5,235,995 ASemitool, Inc. · 1993
- Hydraulically actuated pump for long duration medicament administration74US 7,530,968 B2Valeritas, Inc. · 2009
- Variable proportioner71US 4,572,229 ACrown Technology, Inc. · 1986