F04B 43/0027
Without valves
Official title: {without valves}
F04B43/0027 (Without valves) appears on 24 US grants and 18 published applications in this corpus.
Search patents in F04B- Granted patents
- 24
- Published applications
- 18
- Assignees
- 26
- Inventors
- 67
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 2 | 4 |
| 2019 | 0 | 1 |
| 2020 | 2 | 0 |
| 2021 | 2 | 4 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cooling for an electrically operated displacement pump17 Feb 2026US 12,553,425 B2Graco Minnesota Inc.
- Pumping system in the lab-on-a-chip field18 Feb 2025US 12,228,122 B2Centre National De La Recherche Scientifique
- Heat-driven pumping system30 Jan 2024US 11,885,322 B2Economad Solutions Ltd.
- Microblower6 Sep 2022US 11,434,893 B2Bartels Mikrotechnik GmbH
- Package design for dosing systems and methods of manufacture thereof9 Aug 2022US 11,407,632 B2Dow Global Technologies LLC
- Cooling for an electrically operated displacement pump19 Mar 2026US 2026/0078746 A1Graco Minnesota Inc.
- Cooling for an electrically operated displacement pump6 Jun 2024US 2024/0183347 A1Graco Minnesota Inc.
- Pumping system in the lab-on-a-chip field8 Feb 2024US 2024/0044322 A1Centre National De La Recherche Scientifique
- MIcro Pump Systems and Processing Techniques25 Nov 2021US 2021/0363983 A1Encite LLC
- Heat-Driven Pumping System7 Oct 2021US 2021/0310473 A1Economad Solutions Ltd.
Most cited
By later US patents
- Single valve diaphragm pump with decreased sensitivity to ambient conditions124US 4,594,058 AThe Johns Hopkins University · 1986
- Fluid pump without non-return valves85US 6,227,824 B1Han-Schickard-Gesellschaft für angewandte Forschung e.V. · 2001
- Compact piezoelectric fluidic air supply pump60US 4,648,807 AThe Garrett Corporation · 1987
- Dispenser and method for dispensing viscous fluids55US 5,699,934 AUniversal Instruments Corporation · 1997
- Gas flow generator30US 7,550,034 B2The Technology Partnership PLC · 2009