F04B 9/025
Driving of pistons coacting within one cylinder
Official title: {Driving of pistons coacting within one cylinder}
F04B9/025 (Driving of pistons coacting within one cylinder) appears on 29 US grants and 27 published applications in this corpus.
Search patents in F04B- Granted patents
- 29
- Published applications
- 27
- Assignees
- 25
- Inventors
- 56
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 2 | 2 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 3 | 3 |
| 2020 | 1 | 4 |
| 2021 | 2 | 2 |
| 2022 | 7 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Reduced size fluid transfer and depressurization apparatus, control, and associated methods21 Oct 2025US 12,448,960 B2Tpe Midstream LLC
- Drug delivery device7 Jan 2025US 12,186,529 B2Societe Industrielle de Sonceboz S.A.
- Pumping system with control features for controlling stroke duration and injection volume25 Oct 2022US 11,480,163 B2Saudi Arabian Oil Company
- Direct drive air pump27 Sep 2022US 11,454,223 B2
- Drug delivery device16 Aug 2022US 11,413,392 B2Societe Industrielle de Sonceboz S.A.
- Reduced size fluid transfer and depressurization apparatus, control, and associated methods15 Jan 2026US 2026/0016001 A1Tpe Midstream LLC
- Piston rod mechanism for air compressor and air compressor5 Jun 2025US 2025/0180002 A1Dongguan Active Tools Co., Ltd.
- Reduced size fluid transfer and depressurization apparatus, control, and associated methods11 Jan 2024US 2024/0011512 A1Tpe Midstream LLC
- Drug delivery device12 May 2022US 2022/0143311 A1Societe Industrielle de Sonceboz S.A.
- Piston pump assembly for a hydraulic power vehicle braking system29 Apr 2021US 2021/0122342 A1Robert Bosch GmbH
Most cited
By later US patents
- Reciprocating low pressure ratio compressor27US 6,328,536 B1Ovation Products Corporation · 2001
- Rapidly modulated hydraulic supply for a robotic device24US 10,533,542 B2Sarcos LC · 2020
- Rotating compressor19US 6,592,338 B2Ovation Products Corporation · 2003
- Double acting self-flushing pump17US 4,598,630 AUniversity of KY Research Foundation · 1986
- Compressor employing piston-ring check valves15US 6,602,060 B2Ovation Products Corporation · 2003