F04C 14/22
By changing the eccentricity between cooperating members
Official title: by changing the eccentricity between cooperating members
F04C14/22 (By changing the eccentricity between cooperating members) appears on 426 US grants and 435 published applications in this corpus.
Search patents in F04C- Granted patents
- 426
- Published applications
- 435
- Assignees
- 153
- Inventors
- 605
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 8 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 8 | 0 |
| 1997 | 4 | 0 |
| 1998 | 7 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 5 |
| 2002 | 11 | 12 |
| 2003 | 12 | 10 |
| 2004 | 12 | 13 |
| 2005 | 4 | 13 |
| 2006 | 7 | 5 |
| 2007 | 4 | 8 |
| 2008 | 5 | 21 |
| 2009 | 4 | 28 |
| 2010 | 13 | 23 |
| 2011 | 13 | 16 |
| 2012 | 19 | 17 |
| 2013 | 27 | 31 |
| 2014 | 11 | 24 |
| 2015 | 28 | 41 |
| 2016 | 21 | 36 |
| 2017 | 36 | 24 |
| 2018 | 26 | 21 |
| 2019 | 19 | 13 |
| 2020 | 14 | 27 |
| 2021 | 9 | 12 |
| 2022 | 20 | 12 |
| 2023 | 18 | 8 |
| 2024 | 8 | 9 |
| 2025 | 5 | 1 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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.
- Rotary vane pump13 May 2025US 12,297,739 B2Valeo Powertrain GmbH
- Variable-capacity oil pump13 May 2025US 12,297,829 B2Hitachi Astemo, 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
- Displacement Power Controllers and Applications5 Mar 2026US 2026/0063150 A1Perisseuma Technologies LLC
- Variable displacement oil pump and method for producing variable displacement oil pump26 Feb 2026US 2026/0055762 A1Hitachi Astemo, Ltd.
Most cited
By later US patents
- Fluid pump changeable in diameter, in particular for medical application156US 8,944,748 B2Ecp Entwicklungsgesellschaft Mbh · 2015
- 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
- Reduced rotor assembly diameter vane pump47US 7,997,882 B2MAGNA Powertrain AG & Co KG · 2011