F04C 2270/21
Pressure difference
F04C2270/21 (Pressure difference) appears on 43 US grants and 50 published applications in this corpus.
Search patents in F04C- Granted patents
- 43
- Published applications
- 50
- Assignees
- 45
- Inventors
- 123
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 5 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 3 | 2 |
| 2010 | 3 | 2 |
| 2011 | 2 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 2 | 2 |
| 2015 | 1 | 0 |
| 2016 | 3 | 3 |
| 2017 | 0 | 2 |
| 2018 | 1 | 5 |
| 2019 | 2 | 3 |
| 2020 | 3 | 4 |
| 2021 | 3 | 4 |
| 2022 | 4 | 1 |
| 2023 | 0 | 3 |
| 2024 | 5 | 3 |
| 2025 | 3 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Device for compressing a gaseous fluid and method for operating the device25 Nov 2025US 12,480,493 B2Hanon Systems
- Fuel supply system and fuel supply method for aircraft gas turbine engine9 Sep 2025US 12,410,791 B2IHI Corporation
- Element for compressing a gas and method for controlling such element25 Feb 2025US 12,234,825 B2Atlas Copco Airpower, Naamloze Vennootschap
- Fluid supply system23 Jul 2024US 12,044,179 B2IHI Corporation
- Variable economizer injection position16 Apr 2024US 11,959,483 B2Trane International Inc.
- Method for controlling an eccentric screw pump23 Jul 2026US 2026/0210354 A1Seepex GmbH
- Compression mechanism and scroll compressor1 Jan 2026US 2026/0002538 A1Copeland Climate Technologies (Suzhou) Co. Ltd.
- Fuel supply system and fuel supply method for aircraft gas turbine engine9 Jan 2025US 2025/0012274 A1IHI Corporation
- Element for compressing a gas and method for controlling such element14 Nov 2024US 2024/0376894 A1Atlas Copco Airpower, Naamloze Vennootschap
- Device for compressing a gaseous fluid and method for operating the device7 Nov 2024US 2024/0369062 A1Hanon Systems
Most cited
By later US patents
- Scroll machine with reverse rotation protection87US 5,607,288 ACopeland Corporation · 1997
- Differential pressure sensor for screw compressors61US 5,219,041 AJohnson Service Company · 1993
- Scroll machine with reverse rotation protection52US 5,591,014 ACopeland Corporation · 1997
- Scroll machine with reverse rotation protection39US 5,803,716 ACopeland Corporation · 1998
- Internal intermediate pressure multistage compression type rotary compressor, manufacturing method thereof and displacement ratio setting method10US 7,131,821 B2Sanyo Electric Co., Ltd. · 2006