F01L 25/04
By working-fluid of machine or engine
Official title: by working-fluid of machine or engine, e.g. free-piston machine
F01L25/04 (By working-fluid of machine or engine) appears on 204 US grants and 21 published applications in this corpus.
Search patents in F01L- Granted patents
- 204
- Published applications
- 21
- Assignees
- 103
- Inventors
- 288
- Latest grant
- 5 Sep 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 25 | 0 |
| 1978 | 21 | 0 |
| 1979 | 4 | 0 |
| 1980 | 9 | 0 |
| 1981 | 8 | 0 |
| 1982 | 7 | 0 |
| 1983 | 7 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 7 | 0 |
| 1997 | 8 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 2 |
| 2009 | 2 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 3 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 2 |
| 2019 | 0 | 0 |
| 2020 | 2 | 2 |
| 2021 | 1 | 3 |
| 2022 | 2 | 1 |
| 2023 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Actuator valve of an air operated double diaphragm pump5 Sep 2023US 11,746,771 B2
- Capstan-driven air pump system for opening and closing a longitudinal railcar door16 May 2023US 11,649,744 B2Trinity Rail Group, LLC
- Hydraulic fluid pump and retainer assembly for same14 Jun 2022US 11,359,739 B2Gd Energy Products, LLC
- Internal combustion engine22 Mar 2022US 11,280,293 B2Coutts Industries Inc.
- Internal combustion engine6 Jul 2021US 11,053,884 B2Coutts Industries Inc.
- Actuator valve of an air operated double diaphragm pump20 Oct 2022US 2022/0333592 A1Teryair Equipment Pvt. Ltd.
- Internal Combustion Engine18 Nov 2021US 2021/0355892 A1Coutts Industries Inc.
- Capstan-driven air pump system for opening and closing a longitudinal railcar door29 Apr 2021US 2021/0123362 A1TrinityRail Products and Services, LLC
- Internal Combustion Engine25 Mar 2021US 2021/0087996 A1Coutts Industries Inc.
- Hydraulic fluid pump and retainer assembly for same12 Mar 2020US 2020/0080660 A1Gardner Denver Petroleum Pumps, LLC
Most cited
By later US patents
- Reciprocating infusion pump and directional adapter set for use therewith80US 4,065,230 AHart Associates, Inc. · 1977
- Fluid driven recipricating apparatus66US 5,616,005 AThe Regents of the University of California · 1997
- Mechanical shift, pneumatic assist pilot valve for diaphragm pump64US 4,854,832 AThe Aro Corporation · 1989
- Compressed air driven double diaphragm pump63US 4,406,596 A1983
- Double-acting, fluid-operated pump having pilot valve control of distributor motor55US 4,123,204 AScholle Corporation · 1978