F03C 1/22
Reciprocating-piston liquid engines: with movable cylinders or cylinder
Official title: with movable cylinders {or cylinder}
F03C1/22 (Reciprocating-piston liquid engines: with movable cylinders or cylinder) appears on 57 US grants and 30 published applications in this corpus.
Search patents in F03C- Granted patents
- 57
- Published applications
- 30
- Assignees
- 25
- Inventors
- 86
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 3 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 3 | 2 |
| 2013 | 1 | 2 |
| 2014 | 0 | 0 |
| 2015 | 1 | 3 |
| 2016 | 2 | 0 |
| 2017 | 1 | 5 |
| 2018 | 1 | 2 |
| 2019 | 0 | 1 |
| 2020 | 2 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydrostatic rotating machine with radial pistons and with improved distribution17 Feb 2026US 12,553,501 B2Robert Bosch GmbH
- Radial piston machine with brake17 Dec 2024US 12,169,006 B2Robert Bosch GmbH
- Method and system for harnessing wind energy using a tethered airfoil21 Nov 2023US 11,821,500 B2New Leaf Management Ltd.
- Cylinder block comprising piston-holding means26 Apr 2022US 11,313,345 B2Poclain Hydraulics Industrie
- Harmonic distribution radial piston hydraulic machine20 Jul 2021US 11,067,066 B2Poclain Hydraulics Industrie
- Improved pressure adapter for hydraulic system8 Oct 2026US 2026/0309122 A1Poclain Hydraulics Industrie
- Hydrostatic Rotating Machine with Radial Pistons and with Improved Distribution1 May 2025US 2025/0137517 A1Robert Bosch GmbH
- Radial Piston Machine with Multi-Disc Brake27 Mar 2025US 2025/0102031 A1Robert Bosch GmbH
- Radial Piston Machine with Brake2 Jun 2022US 2022/0170460 A1Robert Bosch GmbH
- Cylinder Block Comprising Piston-Holding Means19 Aug 2021US 2021/0254597 A1Poclain Hydraulics Industrie
Most cited
By later US patents
- Rotary hydraulic engine having oppositely disposed pistons in a scotch yoke assembly17US 4,598,628 A4 Square Motors · 1986
- Air borne craft, for example helicopter, and related devices17US 4,899,957 A1990
- Hydraulic drive unit for driving a drilling tool13US 5,437,338 APoclain Hydraulics · 1995
- Variable displacement hydrostatic pump and neutral return mechanism therefor11US 5,234,321 AEaton Corporation · 1993
- Hydraulic motor with stationary axle and rotating fluid distributor10US 4,700,613 AOy Partek AB · 1987