F01C 21/003
Systems for the equilibration of forces acting on the elements of the
Official title: {Systems for the equilibration of forces acting on the elements of the machine (interstice adjustment other than by fluid pressure F01C21/102)}
F01C21/003 (Systems for the equilibration of forces acting on the elements of the) appears on 93 US grants and 53 published applications in this corpus.
Search patents in F01C- Granted patents
- 93
- Published applications
- 53
- Assignees
- 56
- Inventors
- 165
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 2 |
| 2004 | 1 | 2 |
| 2005 | 0 | 6 |
| 2006 | 5 | 4 |
| 2007 | 3 | 0 |
| 2008 | 3 | 3 |
| 2009 | 0 | 4 |
| 2010 | 3 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 4 |
| 2014 | 3 | 1 |
| 2015 | 3 | 2 |
| 2016 | 1 | 6 |
| 2017 | 6 | 1 |
| 2018 | 1 | 2 |
| 2019 | 1 | 0 |
| 2020 | 2 | 3 |
| 2021 | 1 | 1 |
| 2022 | 2 | 4 |
| 2023 | 2 | 0 |
| 2024 | 2 | 2 |
| 2025 | 1 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Quieted front exhaust motor16 Dec 2025US 12,496,699 B2Ingersoll-Rand Industrial U.S., Inc.
- Methods and systems for sealing rotating equipment such as expanders or compressors22 Oct 2024US 12,123,499 B2
- Machine for depressurizing or compressing gaseous media26 Mar 2024US 11,939,978 B2BITZER Kuehlmaschinenbau GmbH
- Pistonless rotary motor for air compressor26 Sep 2023US 11,767,759 B2
- Expander system26 Sep 2023US 11,767,784 B2Volvo Car Corporation
- Optimized energy recovery device14 Aug 2025US 2025/0257730 A1
- Methods and systems for sealing rotating equipment such as expanders or compressors27 Mar 2025US 2025/0102067 A1
- Air motor with increased dwell at max vane extension7 Nov 2024US 2024/0368992 A1
- Quieted front exhaust motor24 Oct 2024US 2024/0351180 A1Ingersoll-Rand Industrial U.S., Inc.
- Center camshaft scroll pump27 Oct 2022US 2022/0341422 A1
Most cited
By later US patents
- Fluid-cooled, scroll-type, positive fluid displacement apparatus63US 3,986,799 AArthur D. Little, Inc. · 1976
- Scroll type fluid machinery with counter weight on drive bushing48US 5,199,862 AMitsubishi Jukogyo Kabushiki Kaisha · 1993
- Scroll type fluid displacement apparatus with balance weight41US 4,475,875 ASanden Corporation · 1984
- Scroll type fluid apparatus with lubrication of rotation preventing mechanism and thrust bearing39US 4,637,786 ADaikin Industries, Ltd. · 1987
- Scroll type fluid machinery having a tilt regulating member38US 5,145,346 AMitsubishi Jukogyo Kabushiki Kaisha · 1992