F03C 1/00
Reciprocating-piston liquid engines
F03C1/00 (Reciprocating-piston liquid engines) appears on 771 US grants and 604 published applications in this corpus.
Search patents in F03C- Granted patents
- 771
- Published applications
- 604
- Assignees
- 291
- Inventors
- 1,225
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 25 | 0 |
| 1977 | 26 | 0 |
| 1978 | 25 | 0 |
| 1979 | 7 | 0 |
| 1980 | 17 | 0 |
| 1981 | 7 | 0 |
| 1982 | 8 | 0 |
| 1983 | 8 | 0 |
| 1984 | 8 | 0 |
| 1985 | 12 | 0 |
| 1986 | 8 | 0 |
| 1987 | 10 | 0 |
| 1988 | 12 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 8 | 0 |
| 1993 | 13 | 0 |
| 1994 | 2 | 0 |
| 1995 | 8 | 0 |
| 1996 | 5 | 0 |
| 1997 | 10 | 0 |
| 1998 | 16 | 0 |
| 1999 | 13 | 0 |
| 2000 | 9 | 0 |
| 2001 | 12 | 3 |
| 2002 | 17 | 8 |
| 2003 | 9 | 11 |
| 2004 | 9 | 14 |
| 2005 | 7 | 13 |
| 2006 | 9 | 11 |
| 2007 | 9 | 11 |
| 2008 | 5 | 20 |
| 2009 | 6 | 12 |
| 2010 | 5 | 11 |
| 2011 | 5 | 10 |
| 2012 | 17 | 16 |
| 2013 | 18 | 28 |
| 2014 | 14 | 34 |
| 2015 | 16 | 45 |
| 2016 | 23 | 33 |
| 2017 | 32 | 43 |
| 2018 | 27 | 37 |
| 2019 | 44 | 47 |
| 2020 | 45 | 45 |
| 2021 | 39 | 35 |
| 2022 | 30 | 32 |
| 2023 | 41 | 25 |
| 2024 | 23 | 25 |
| 2025 | 24 | 19 |
| 2026 | 13 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F03C 1/02Reciprocating-piston liquid engines: with multiple-cylinders, characterised by the number or arrangement of561
- F03C 1/007Reciprocating-piston liquid engines: with single cylinder, double-acting piston77
- F03C 1/22Reciprocating-piston liquid engines: with movable cylinders or cylinder57
- F03C 1/26Reciprocating-piston liquid engines: adapted for special use or combined with apparatus driven57
- F03C 1/003Controlling36
- F03C 1/08Distributing valve-gear peculiar thereto23
- F03C 1/002Details21
- F03C 1/013Reciprocating-piston liquid engines: with single cylinder, single-acting piston20
All 9 subgroupsShow fewer
Recent patents
- Fluid-pressure rotary actuator for clamping systems29 Sep 2026US 12,746,641 B2Rapid Design Solutions, LLC
- Hydraulic axial piston machine25 Aug 2026US 12,716,356 B2Danfoss A/S
- Axial piston machine with neutral valve integrated in the pot-like housing part11 Aug 2026US 12,704,108 B2Robert Bosch GmbH
- Slipper component with ceramic surface11 Aug 2026US 12,704,117 B2Ocean Pacific Technologies
- Hydrostatic radial piston unit26 May 2026US 12,638,057 B2Danfoss A/S
- Hydraulic motor8 Oct 2026US 2026/0309121 A1Worldpower AS
- Improved pressure adapter for hydraulic system8 Oct 2026US 2026/0309122 A1Poclain Hydraulics Industrie
- Volumetric variable displacement machine8 Oct 2026US 2026/0309147 A1
- Hydrostatic Rotary Machine Having Pins That Engage Grooves of a Cam Ring24 Sep 2026US 2026/0286928 A1Robert Bosch GmbH
- Improved axial piston hydraulic machine6 Aug 2026US 2026/0226888 A1
Most cited
By later US patents
- Proportioning pump with pneumatic distributor64US 4,047,850 ACommissariat A L' Energie Atomique · 1977
- Tandem hydraulic motor59US 5,207,060 ASauer Inc. · 1993
- Hydraulic engine powered by introduction and removal of heat from a working fluid57US 5,899,067 A1999
- Adaptive fluid motor control51US 5,794,442 A1998
- Hydro-electric hybrid drive system for motor vehicle46US 7,841,432 B2Bosch Rexroth AG · 2010