F03C 1/045
By using a valve in a system with several pump or motor
Official title: {by using a valve in a system with several pump or motor chambers, wherein the flow path through the chambers can be changed, e.g. series-parallel}
F03C1/045 (By using a valve in a system with several pump or motor) appears on 53 US grants and 37 published applications in this corpus.
Search patents in F03C- Granted patents
- 53
- Published applications
- 37
- Assignees
- 24
- Inventors
- 76
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 2 | 2 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 4 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 2 | 3 |
| 2013 | 2 | 1 |
| 2014 | 0 | 2 |
| 2015 | 1 | 0 |
| 2016 | 2 | 2 |
| 2017 | 2 | 3 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 3 | 1 |
| 2021 | 3 | 1 |
| 2022 | 2 | 5 |
| 2023 | 1 | 2 |
| 2024 | 0 | 2 |
| 2025 | 3 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Hydrostatic motor unit27US 6,248,037 B1Linde Aktiengesellschaft · 2001
- Pressurized fluid engine equipped with means for selecting its speed of rotation19US 4,404,896 APoclain Hydraulics · 1983
- Radial-piston hydraulic motor and method for regulation of a radial-piston hydraulic motor18US 5,836,231 AValmet Voimansiirto Oy · 1998
- Motor or pump mechanism having at least two distinct active cylinder capacities15US 4,724,742 APoclain Hydraulics · 1988
- Selectively operative multi-displacement pump or motor14US 4,532,854 ARenold Plc, A British Company of Renold House · 1985