F01C 21/0863
The fluid being the working fluid
Official title: {the fluid being the working fluid}
F01C21/0863 (The fluid being the working fluid) appears on 219 US grants and 216 published applications in this corpus.
Search patents in F01C- Granted patents
- 219
- Published applications
- 216
- Assignees
- 98
- Inventors
- 396
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 7 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 4 | 7 |
| 2003 | 6 | 8 |
| 2004 | 5 | 9 |
| 2005 | 7 | 16 |
| 2006 | 7 | 12 |
| 2007 | 3 | 6 |
| 2008 | 5 | 17 |
| 2009 | 19 | 7 |
| 2010 | 5 | 7 |
| 2011 | 6 | 20 |
| 2012 | 5 | 6 |
| 2013 | 8 | 6 |
| 2014 | 10 | 9 |
| 2015 | 10 | 9 |
| 2016 | 4 | 12 |
| 2017 | 12 | 20 |
| 2018 | 13 | 14 |
| 2019 | 8 | 4 |
| 2020 | 10 | 10 |
| 2021 | 6 | 3 |
| 2022 | 4 | 4 |
| 2023 | 5 | 5 |
| 2024 | 8 | 2 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Vane pump featuring fluid lubrication for an impeller17 Mar 2026US 12,577,949 B2Schwäbische Hüttenwerke Automotive GmbH
- Compressor, air conditioner and method for assembling compressor10 Dec 2024US 12,163,521 B2Green Refrigeration Equipment Engineering Research Center of Zhuhai Gree Co., Ltd.
- Fluid transfer apparatus3 Dec 2024US 12,158,149 B2Korea Atomic Energy Research Institute
- Flange and pump body assembly with same26 Nov 2024US 12,152,584 B2Gree Electric Appliances, Inc. of Zhuhai
- Rotary compressor22 Oct 2024US 12,123,414 B2LG Electronics Inc.
- Vane pump with hydrostatic pressure plates12 Feb 2026US 2026/0043402 A1Eaton Intelligent Power Limited
- Kidney port configurations in port plates for balanced vanes27 Mar 2025US 2025/0101977 A1Hamilton Sundstrand Corporation
- Vane pump featuring fluid lubrication for an impeller12 Dec 2024US 2024/0410364 A1Schwäbische Hüttenwerke Automotive GmbH
- Rotary compressor23 May 2024US 2024/0167476 A1LG Electronics Inc.
- Rotary compressor2 Nov 2023US 2023/0349382 A1LG Electronics Inc.
Most cited
By later US patents
- Rotary hydraulic vane pump with undervane passages for priming53US 4,386,891 AGeneral Motors Corporation · 1983
- Rotary pump having a hydraulic intermediate capacity with first and second connections48US 6,817,847 B2LuK Fahrzeug-Hydraulik GmbH & Co.KG · 2004
- Variable displacement vane pump, component parts and method30US 5,545,014 AColtec Industries Inc. · 1996
- High efficiency rotary vane motor28US 6,106,255 AThermo King Corporation · 2000
- Vane pump having vane pressurizing grooves26US 5,490,770 AAisin Seiki Kabushiki Kaisha · 1996