F03C 1/02
Reciprocating-piston liquid engines: with multiple-cylinders, characterised by the number or arrangement of
Official title: with multiple-cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C1/22; of flexible-wall type F03C7/00)
F03C1/02 (Reciprocating-piston liquid engines: with multiple-cylinders, characterised by the number or arrangement of) appears on 561 US grants and 494 published applications in this corpus.
Search patents in F03C- Granted patents
- 561
- Published applications
- 494
- Assignees
- 206
- Inventors
- 925
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 9 | 0 |
| 1978 | 10 | 0 |
| 1979 | 0 | 0 |
| 1980 | 11 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 7 | 0 |
| 1986 | 5 | 0 |
| 1987 | 7 | 0 |
| 1988 | 7 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 11 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 8 | 0 |
| 1998 | 6 | 0 |
| 1999 | 10 | 0 |
| 2000 | 6 | 0 |
| 2001 | 12 | 3 |
| 2002 | 14 | 7 |
| 2003 | 7 | 9 |
| 2004 | 7 | 12 |
| 2005 | 6 | 11 |
| 2006 | 8 | 10 |
| 2007 | 8 | 7 |
| 2008 | 3 | 11 |
| 2009 | 5 | 10 |
| 2010 | 4 | 8 |
| 2011 | 2 | 7 |
| 2012 | 13 | 14 |
| 2013 | 12 | 22 |
| 2014 | 9 | 25 |
| 2015 | 12 | 35 |
| 2016 | 20 | 29 |
| 2017 | 23 | 35 |
| 2018 | 22 | 34 |
| 2019 | 36 | 38 |
| 2020 | 37 | 36 |
| 2021 | 32 | 30 |
| 2022 | 23 | 26 |
| 2023 | 34 | 22 |
| 2024 | 20 | 21 |
| 2025 | 20 | 17 |
| 2026 | 12 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- 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
- Hydraulic machine6 Aug 2026US 2026/0226967 A1Danfoss Scotland Limited
Most cited
By later US patents
- Tandem hydraulic motor59US 5,207,060 ASauer Inc. · 1993
- Hydro-electric hybrid drive system for motor vehicle46US 7,841,432 B2Bosch Rexroth AG · 2010
- Rotary hydrostatic radial piston machines44US 4,686,829 AUnipat AG · 1987
- Hydraulic motor unit42US 4,271,725 AEbara Corporation · 1981
- Rotary cam internal combustion radial engine37US 3,964,450 A1976