F04C 2270/72
Preventing reverse rotation
Official title: preventing reverse rotation
F04C2270/72 (Preventing reverse rotation) appears on 117 US grants and 47 published applications in this corpus.
Search patents in F04C- Granted patents
- 117
- Published applications
- 47
- Assignees
- 41
- Inventors
- 207
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 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 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 11 | 0 |
| 1997 | 6 | 0 |
| 1998 | 9 | 0 |
| 1999 | 1 | 0 |
| 2000 | 10 | 0 |
| 2001 | 9 | 0 |
| 2002 | 7 | 7 |
| 2003 | 7 | 6 |
| 2004 | 0 | 1 |
| 2005 | 2 | 8 |
| 2006 | 5 | 4 |
| 2007 | 4 | 0 |
| 2008 | 2 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 3 |
| 2017 | 1 | 3 |
| 2018 | 3 | 1 |
| 2019 | 4 | 3 |
| 2020 | 3 | 3 |
| 2021 | 1 | 0 |
| 2022 | 2 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 2 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Scroll-type electric compressor6 Oct 2026US 12,753,761 B2Sanden Corporation
- Device for compressing a gaseous fluid and method for operating the device25 Nov 2025US 12,480,493 B2Hanon Systems
- Scroll compressor18 Nov 2025US 12,473,918 B2LG Electronics Inc.
- Compressor fault diagnostic apparatus and system12 Sep 2023US 11,754,073 B2LG Electronics Inc.
- Fluid compressor25 Oct 2022US 11,480,179 B2LG Electronics Inc.
- Scroll-type electric compressor7 May 2026US 2026/0126044 A1Sanden Corporation
- Scroll compressor5 Jun 2025US 2025/0180017 A1LG Electronics Inc.
- Oil-Free Air Compressor27 Mar 2025US 2025/0101984 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Device for compressing a gaseous fluid and method for operating the device7 Nov 2024US 2024/0369062 A1Hanon Systems
- Compressor fault diagnostic apparatus and system16 Jul 2020US 2020/0224948 A1LG Electronics Inc.
Most cited
By later US patents
- System and method for controlling rotary screw compressors125US 6,450,771 B1Coltec Industries Inc. · 2002
- System and methods for controlling rotary screw compressors122US 5,713,724 AColtec Industries Inc. · 1998
- Scroll compressor with a thrust reduction mechanism96US 4,696,630 AKabushiki Kaisha Toshiba · 1987
- Scroll machine with reverse rotation protection87US 5,607,288 ACopeland Corporation · 1997
- Systems and methods for remotely controlling a machine82US 6,529,590 B1Coltec Industries Inc. · 2003