F04C 28/065
Capacity control using a multiplicity of units or pumping capacities
Official title: {Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable}
F04C28/065 (Capacity control using a multiplicity of units or pumping capacities) appears on 44 US grants and 55 published applications in this corpus.
Search patents in F04C- Granted patents
- 44
- Published applications
- 55
- Assignees
- 30
- Inventors
- 142
- Latest grant
- 28 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 3 |
| 2007 | 0 | 0 |
| 2008 | 2 | 8 |
| 2009 | 2 | 1 |
| 2010 | 3 | 3 |
| 2011 | 1 | 5 |
| 2012 | 4 | 0 |
| 2013 | 2 | 3 |
| 2014 | 1 | 1 |
| 2015 | 2 | 2 |
| 2016 | 3 | 2 |
| 2017 | 0 | 4 |
| 2018 | 0 | 6 |
| 2019 | 5 | 1 |
| 2020 | 1 | 4 |
| 2021 | 2 | 3 |
| 2022 | 1 | 1 |
| 2023 | 4 | 2 |
| 2024 | 4 | 1 |
| 2025 | 2 | 3 |
By publication year. Applications have been published since 2001.
Recent patents
- Gas compressor and gas compression system28 Oct 2025US 12,454,953 B2Hitachi Industrial Equipment Systems Co., Ltd.
- Multi-compressor system with normally-open valves in oil balancing connections4 Mar 2025US 12,241,670 B2Danfoss Commercial Compressors
- Compressor, air conditioner and method for assembling compressor10 Dec 2024US 12,163,521 B2Green Refrigeration Equipment Engineering Research Center of Zhuhai Gree Co., Ltd.
- Scroll compressor17 Sep 2024US 12,092,109 B2LG Electronics Inc.
- Air conditioner and compressor9 Apr 2024US 11,953,008 B2Gree Green Refrigeration Technology Center Co., Ltd. of Zhuhai
- Fluid routing for a vacuum pumping system21 Aug 2025US 2025/0266268 A1Edwards Limited
- Chemical vapor deposition apparatus26 Jun 2025US 2025/0207256 A1
- Gas Compressor and Gas Compression System15 May 2025US 2025/0154954 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Scroll compressor18 Jul 2024US 2024/0240637 A1LG Electronics Inc.
- Multi-compressor system with normally-open valves in oil balancing connections5 Oct 2023US 2023/0314048 A1Danfoss Commercial Compressors
Most cited
By later US patents
- Multiple compressor refrigeration system and controller thereof124US 4,384,462 AFriedrich Air Conditioning & Refrigeration Co. · 1983
- Method of controlling operation of a plurality of compressors102US 4,580,947 AHitachi, Ltd. · 1986
- Control for refrigeration compressors95US 4,152,902 A1979
- Method and control system for controlling multiple throttled inlet rotary screw compressors14US 6,652,240 B2Scales Air Compressor · 2003
- Capacity varying type rotary compressor and refrigeration system having the same13US 7,798,791 B2LG Electronics Inc. · 2010