F04C 28/26
Using bypass channels
Official title: using bypass channels
F04C28/26 (Using bypass channels) appears on 394 US grants and 362 published applications in this corpus.
Search patents in F04C- Granted patents
- 394
- Published applications
- 362
- Assignees
- 132
- Inventors
- 737
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 5 | 0 |
| 1994 | 12 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 7 | 0 |
| 1998 | 10 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 9 | 3 |
| 2002 | 14 | 7 |
| 2003 | 8 | 15 |
| 2004 | 11 | 14 |
| 2005 | 5 | 12 |
| 2006 | 6 | 12 |
| 2007 | 8 | 10 |
| 2008 | 9 | 15 |
| 2009 | 6 | 12 |
| 2010 | 4 | 15 |
| 2011 | 13 | 15 |
| 2012 | 10 | 12 |
| 2013 | 15 | 16 |
| 2014 | 14 | 15 |
| 2015 | 16 | 11 |
| 2016 | 9 | 15 |
| 2017 | 17 | 22 |
| 2018 | 17 | 20 |
| 2019 | 13 | 13 |
| 2020 | 14 | 15 |
| 2021 | 17 | 14 |
| 2022 | 22 | 20 |
| 2023 | 14 | 13 |
| 2024 | 28 | 16 |
| 2025 | 10 | 14 |
| 2026 | 2 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fixed scroll assembly and scroll compressor7 Jul 2026US 12,674,458 B2Copeland Climate Technologies (Suzhou) Co. Ltd.
- Electric compressor with passive pressure system between high and low pressure regions9 Jun 2026US 12,650,126 B2Mahle International GmbH
- Pre-pressurized system with reverse rotation of pump for valve actuation16 Dec 2025US 12,497,957 B2Johnson Electric Motion Technology Canada Ltd.
- Device for compressing a gaseous fluid and method for operating the device25 Nov 2025US 12,480,493 B2Hanon Systems
- Variable capacity bypass valve for screw compressor11 Nov 2025US 12,467,458 B2Hitachi Global Air Power US, LLC
- Operation control method for engine driven compressor and engine driven compressor27 Aug 2026US 2026/0251144 A1Airman Corporation
- Gas Compressor20 Aug 2026US 2026/0243258 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Gas Compressor20 Aug 2026US 2026/0243261 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Discharge Passages For Compressors and Compressors Including Same13 Aug 2026US 2026/0235126 A1
- Air Compressor30 Jul 2026US 2026/0218705 A1Hitachi Industrial Equipment Systems Co., Ltd.
Most cited
By later US patents
- Scroll-type machine with axially compliant mounting226US 4,877,382 ACopeland Corporation · 1989
- Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor194US 6,047,557 ACopeland Corporation · 2000
- Compressor pulse width modulation172US 6,213,731 B1Copeland Corporation · 2001
- Capacity modulated scroll machine162US 5,613,841 ACopeland Corporation · 1997
- Capacity modulated scroll machine156US 5,741,120 ACopeland Corporation · 1998