F04C 14/18
Control of, monitoring of, or safety arrangements for, machines, pumps or pumping
Official title: characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C14/10)
F04C14/18 (Control of, monitoring of, or safety arrangements for, machines, pumps or pumping) appears on 521 US grants and 522 published applications in this corpus.
Search patents in F04C- Granted patents
- 521
- Published applications
- 522
- Assignees
- 203
- Inventors
- 768
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 11 | 0 |
| 1986 | 2 | 0 |
| 1987 | 9 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 9 | 0 |
| 1997 | 11 | 0 |
| 1998 | 9 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 7 |
| 2002 | 12 | 13 |
| 2003 | 14 | 11 |
| 2004 | 12 | 14 |
| 2005 | 5 | 16 |
| 2006 | 8 | 6 |
| 2007 | 6 | 13 |
| 2008 | 5 | 28 |
| 2009 | 7 | 33 |
| 2010 | 19 | 25 |
| 2011 | 16 | 20 |
| 2012 | 22 | 26 |
| 2013 | 31 | 33 |
| 2014 | 16 | 27 |
| 2015 | 32 | 46 |
| 2016 | 21 | 39 |
| 2017 | 38 | 29 |
| 2018 | 30 | 32 |
| 2019 | 24 | 18 |
| 2020 | 15 | 32 |
| 2021 | 14 | 15 |
| 2022 | 27 | 13 |
| 2023 | 20 | 10 |
| 2024 | 8 | 9 |
| 2025 | 7 | 1 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rotary pump with telescoping rotor sections that vary the flow rate18 Aug 2026US 12,710,040 B1Pratt & Whitney Canada Corp.
- Variable displacement pump24 Feb 2026US 12,560,168 B2Hitachi Astemo, Ltd.
- Fluid pump changeable in diameter, in particular for medical application30 Dec 2025US 12,508,417 B2Ecp Entwicklungsgesellschaft Mbh
- Variable displacement oil pump21 Oct 2025US 12,448,967 B2Hitachi Astemo, Ltd.
- Pump with variable suction/discharge amount and drive device composed of the pump and driving method thereof9 Sep 2025US 12,410,793 B2CH Creative Co., Ltd.
- Lubrication system for an internal combustion engine25 Jun 2026US 2026/0176992 A1DAF Trucks N. V.
- Mutant gene detection method18 Jun 2026US 2026/0168008 A1Hitachi High-Tech Corporation
- Fluid pump changeable in diameter, in particular for medical application26 Mar 2026US 2026/0083958 A1Ecp Entwicklungsgesellschaft Mbh
- Adjustable pump for pumping a liquid food product19 Mar 2026US 2026/0078755 A1Tetra Laval Holdings & Finance S. A.
- Displacement Power Controllers and Applications5 Mar 2026US 2026/0063150 A1Perisseuma Technologies LLC
Most cited
By later US patents
- Fluid pump changeable in diameter, in particular for medical application156US 8,944,748 B2Ecp Entwicklungsgesellschaft Mbh · 2015
- Scroll machine with continuous capacity modulation148US 6,412,293 B1Copeland Corporation · 2002
- Fluid pump changeable in diameter, in particular for medical application65US 11,278,711 B2Ecp Entwicklungsgesellschaft Mbh · 2022
- Variable displacement gerotor pump58US 4,492,539 A1985
- Fluid pump changeable in diameter, in particular for medical application55US 9,512,839 B2Ecp Entwicklungsgesellschaft Mbh · 2016