F03C 1/0076
The liquid under pressure being continuously delivered to one cylinder chamber through
Official title: {the liquid under pressure being continuously delivered to one cylinder chamber through a valve in the piston for actuating the return stroke}
F03C1/0076 (The liquid under pressure being continuously delivered to one cylinder chamber through) appears on 18 US grants and 6 published applications in this corpus.
Search patents in F03C- Granted patents
- 18
- Published applications
- 6
- Assignees
- 7
- Inventors
- 29
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 2 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Hydraulically actuated double-acting positive displacement pump system for producing fluids from a wellbore9 Dec 2025US 12,492,620 B2PMC Pumps Inc.
- Hydraulic motor capable of many different applications able to use low pressure or high pressure fluids to operate25 Jun 2019US 10,330,199 B2
- Reversible hydraulic pressure converter employing tubular valves4 Jul 2017US 9,695,840 B2
- Hydraulic motor capable of many different applications able to use low-pressure or high-pressure fluids to operate9 Feb 2016US 9,254,072 B2
- Double acting reciprocating motor with uni-directional fluid flow8 Jul 2003US 6,589,027 B2Westport Research Inc.
- Hydraulically actuated double-acting positive displacement pump system for producing fluids from a wellbore15 Feb 2024US 2024/0052732 A1PMC Pumps Inc.
- Motor capable of many different applications21 May 2020US 2020/0158240 A1
- Hydraulic motor capable of many different applications able to use low pressure or high pressure fluids to operate3 Sep 2015US 2015/0247453 A1
- Reversible hydraulic pressure converter employing tubular valves26 Feb 2015US 2015/0053075 A1
- Hydraulic motor capable of many different applications able to use low-pressure or high-pressure fluids to operate27 Mar 2014US 2014/0083287 A1
Most cited
By later US patents
- Paint pump for airless spray guns42US 4,030,857 AChampion Spark Plug Company · 1977
- Hydraulically actuated pump assembly14US 4,118,154 A1978
- Pneumatic impact devices10US 4,070,948 A1978
- Linear hydraulic motor8US 3,939,755 AAmiad Systems Limited · 1976
- Reciprocating fluid stroke motors with automatic control6US 4,127,057 A1978