F04C 28/16
Using lift valves
Official title: using lift valves
F04C28/16 (Using lift valves) appears on 153 US grants and 77 published applications in this corpus.
Search patents in F04C- Granted patents
- 153
- Published applications
- 77
- Assignees
- 56
- Inventors
- 304
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 6 | 0 |
| 1985 | 8 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 7 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 8 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 6 | 3 |
| 2003 | 5 | 4 |
| 2004 | 4 | 6 |
| 2005 | 3 | 1 |
| 2006 | 5 | 9 |
| 2007 | 0 | 1 |
| 2008 | 3 | 0 |
| 2009 | 3 | 5 |
| 2010 | 1 | 3 |
| 2011 | 3 | 2 |
| 2012 | 1 | 3 |
| 2013 | 2 | 1 |
| 2014 | 3 | 4 |
| 2015 | 2 | 2 |
| 2016 | 3 | 6 |
| 2017 | 5 | 4 |
| 2018 | 4 | 6 |
| 2019 | 5 | 2 |
| 2020 | 1 | 1 |
| 2021 | 4 | 2 |
| 2022 | 2 | 2 |
| 2023 | 2 | 2 |
| 2024 | 4 | 3 |
| 2025 | 2 | 1 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Economizer port valve7 Apr 2026US 12,595,943 B2Tyco Fire & Security GmbH
- Compact variable volume index valve for screw compressor background11 Feb 2025US 12,221,963 B2Hitachi Global Air Power US, LLC
- Scroll compressor with center hub7 Jan 2025US 12,188,470 B2Copeland Corporation
- Retainer block bypass hole valve assembly arranged in non-orbiting scroll of a compressor24 Sep 2024US 12,098,723 B2LG Electronics Inc.
- Injection valve assembly for a compressor11 Jun 2024US 12,006,938 B1Hanon Systems
- Discharge Passages For Compressors and Compressors Including Same13 Aug 2026US 2026/0235126 A1
- Compressor Having Capacity Modulation System29 Jan 2026US 2026/0028988 A1Copeland Corporation
- Compressor Having Capacity Modulation System29 Jan 2026US 2026/0028989 A1Copeland Corporation
- Compressor Having Capacity Modulation System29 Jan 2026US 2026/0028990 A1Copeland Corporation
- Compressor Having Capacity Modulation System23 Oct 2025US 2025/0327449 A1Copeland Corporation
Most cited
By later US patents
- Gas compressor of the scroll type having delayed suction closing capacity modulation108US 4,383,805 AThe Trane Company · 1983
- Scroll-type machine106US 4,497,615 ACopeland Corporation · 1985
- Scroll-type compressor with variable displacement mechanism95US 5,336,058 ASanden Corporation · 1994
- Scroll type compressor with displacement adjusting mechanism90US 4,642,034 ASanden Corporation · 1987
- Air conditioner or refrigerating plant incorporating scroll compressor87US 4,774,816 AHitachi, Ltd. · 1988