F04C 11/005
Combinations of two or more machines or pumps, each being of rotary-piston
Official title: {of dissimilar working principle}
F04C11/005 (Combinations of two or more machines or pumps, each being of rotary-piston) appears on 136 US grants and 143 published applications in this corpus.
Search patents in F04C- Granted patents
- 136
- Published applications
- 143
- Assignees
- 127
- Inventors
- 347
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 3 | 4 |
| 2003 | 2 | 6 |
| 2004 | 7 | 5 |
| 2005 | 1 | 4 |
| 2006 | 5 | 3 |
| 2007 | 0 | 6 |
| 2008 | 2 | 8 |
| 2009 | 3 | 7 |
| 2010 | 4 | 4 |
| 2011 | 3 | 4 |
| 2012 | 8 | 7 |
| 2013 | 3 | 7 |
| 2014 | 4 | 8 |
| 2015 | 2 | 8 |
| 2016 | 6 | 15 |
| 2017 | 9 | 11 |
| 2018 | 11 | 6 |
| 2019 | 5 | 4 |
| 2020 | 5 | 5 |
| 2021 | 4 | 5 |
| 2022 | 7 | 3 |
| 2023 | 4 | 3 |
| 2024 | 3 | 3 |
| 2025 | 2 | 6 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electric diaphragm pump with offset slider crank28 Apr 2026US 12,612,911 B2Ingersoll-Rand Industrial U.S., Inc.
- Fuel supply system and fuel supply method for aircraft gas turbine engine9 Sep 2025US 12,410,791 B2IHI Corporation
- Electric motor with dual pump for providing scavenge and delivery functions8 Apr 2025US 12,270,396 B2GHSP, Inc.
- Fluid supply system23 Jul 2024US 12,044,179 B2IHI Corporation
- Hydraulic pump having impeller pump and trochoid pump18 Jun 2024US 12,012,956 B2Thales
- Pump assembly for gas turbine engines4 Dec 2025US 2025/0369371 A1Rtx Corporation
- Two-Stage Pump27 Nov 2025US 2025/0361864 A1Truma Gerätetechnik GmbH & Co. KG
- External gear and rotor hybrid pump18 Sep 2025US 2025/0290509 A1Roper Pump Company
- Pump arrangement28 Aug 2025US 2025/0270994 A1Valeo Embrayages
- Tandem pump comprising a main flow and a dry sump flow27 Mar 2025US 2025/0101978 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents
- System and method for driving a pump174US 8,801,394 B2Solar Turbines Incorporated · 2014
- Dual pump unit55US 6,361,282 B1Brueninghaus Hydromatik GmbH · 2002
- Reciprocating pump with dual circuit power end lubrication system49US 10,352,321 B2S,P.M. Flow Control, Inc. · 2019
- Highly-viscous-fluid applying apparatus capable of controlling delivery amount of fluid35US 6,736,900 B2Fuji Machine Mfg. Co., Ltd. · 2004
- Fixed displacement vane pump with undervane pumping34US 4,354,809 AChandler Evans Inc. · 1982