F04B 7/045
Two pistons coacting within one cylinder
Official title: {Two pistons coacting within one cylinder}
F04B7/045 (Two pistons coacting within one cylinder) appears on 20 US grants and 16 published applications in this corpus.
Search patents in F04B- Granted patents
- 20
- Published applications
- 16
- Assignees
- 17
- Inventors
- 32
- Latest grant
- 7 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 2 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Drug delivery device7 Jan 2025US 12,186,529 B2Societe Industrielle de Sonceboz S.A.
- Drug delivery device16 Aug 2022US 11,413,392 B2Societe Industrielle de Sonceboz S.A.
- Dosing apparatus for dispensing a fluid under aseptic conditions22 Jun 2021US 11,040,146 B2Shl Medical AG
- Dosing apparatus for dispensing a fluid under aseptic conditions19 May 2020US 10,653,846 B2Idorsia Pharmaceuticals Ltd
- Piston-type transfer pump device, method for transferring particulate solid matter using such a device, application of the method to the feeding of a gasification reactor27 Feb 2018US 9,903,351 B2Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- A sub-assembly of a pump device25 Dec 2025US 2025/0389261 A1Shl Medical AG
- Drug delivery device12 May 2022US 2022/0143311 A1Societe Industrielle de Sonceboz S.A.
- Dosing appratus for dispensing a fluid under aseptic conditions24 Sep 2020US 2020/0297935 A1Idorsia Pharmaceuticals Ltd
- Drug delivery device5 Dec 2019US 2019/0365993 A1Societe Industrielle de Sonceboz S.A.
- Dosing appratus for dispensing a fluid under aseptic conditions28 Jul 2016US 2016/0213851 A1Weibel CDS AG
Most cited
By later US patents
- Pump with inlet and outlet simultaneously exposed to pump chamber and method of operating same50US 5,639,220 ABrother Kogyo Kabushiki Kaisha · 1997
- Micropump33US 9,222,470 B2Sensile Pat AG · 2015
- Dosing pump25US 4,405,294 ADragerwerk Aktiengesellschaft · 1983
- Device for the metered delivery of a viscous liquid21US 6,935,539 B2ESEC Trading SA · 2005
- Device for the metered delivery of a viscous liquid20US 6,705,845 B2ESEC Trading SA · 2004