F04D 27/005
Control: by changing flow path between different stages or between a plurality
Official title: {by changing flow path between different stages or between a plurality of compressors; Load distribution between compressors}
F04D27/005 (Control: by changing flow path between different stages or between a plurality) appears on 65 US grants and 89 published applications in this corpus.
Search patents in F04D- Granted patents
- 65
- Published applications
- 89
- Assignees
- 63
- Inventors
- 167
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 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 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 2 | 10 |
| 2016 | 4 | 4 |
| 2017 | 4 | 9 |
| 2018 | 6 | 7 |
| 2019 | 6 | 6 |
| 2020 | 5 | 7 |
| 2021 | 4 | 8 |
| 2022 | 7 | 10 |
| 2023 | 9 | 4 |
| 2024 | 6 | 5 |
| 2025 | 5 | 3 |
| 2026 | 3 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Multi-pressure integrated air pump12US 11,686,299 B2Intex Marketing Ltd. · 2023
- Pump device11US 4,558,992 AMitsubishi Denki Kabushiki Kaisha · 1985
- Apparatus and method for controlling compressor, and refrigerator having the same10US 9,670,933 B2LG Electronics Inc. · 2017
- Built-in electric air pumps for inflating objects8US 10,443,602 B2Bestway Inflatables & Material Corp. · 2019
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