F04B 39/108
Circular reed valves
Official title: {circular reed valves}
F04B39/108 (Circular reed valves) appears on 50 US grants and 41 published applications in this corpus.
Search patents in F04B- Granted patents
- 50
- Published applications
- 41
- Assignees
- 40
- Inventors
- 143
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 5 |
| 2005 | 1 | 0 |
| 2006 | 1 | 5 |
| 2007 | 0 | 0 |
| 2008 | 2 | 1 |
| 2009 | 0 | 2 |
| 2010 | 2 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 2 |
| 2014 | 1 | 2 |
| 2015 | 0 | 5 |
| 2016 | 2 | 0 |
| 2017 | 1 | 4 |
| 2018 | 1 | 0 |
| 2019 | 2 | 1 |
| 2020 | 3 | 1 |
| 2021 | 2 | 0 |
| 2022 | 0 | 2 |
| 2023 | 3 | 3 |
| 2024 | 1 | 0 |
| 2025 | 1 | 5 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Valve15 Apr 2025US 12,276,345 B2Lee Ventus Ltd.
- Air compressor with ramped head deck30 Apr 2024US 11,971,026 B2Zf Cv Systems Europe BV
- Valve12 Dec 2023US 11,841,094 B2Ttp Ventus Ltd.
- Valve28 Nov 2023US 11,828,374 B2Ttp Ventus Ltd.
- Integrated air supply unit14 Nov 2023US 11,813,916 B2Beijingwest Industries Co., Ltd.
- Compressor21 May 2026US 2026/0139675 A1Mitsubishi Heavy Industries Thermal Systems, Ltd.
- Valve for controlling fluid flow therethrough23 Oct 2025US 2025/0327529 A1
- Reciprocating compressor with non-self-actuated suction valve8 May 2025US 2025/0146483 A1Heaten AS
- High pressure compressor system for compressed air or gas rifles or pistols24 Apr 2025US 2025/0130010 A1Gamo Outdoor, S.L.
- Reciprocating compressor10 Apr 2025US 2025/0116265 A1LG Electronics Inc.
Most cited
By later US patents
- Increased efficiency valve system for a fluid pumping assembly20US 5,147,190 AGeneral Motors Corporation · 1992
- Diaphragm vacuum pump16US 3,981,636 AToyota Jidosha Kogyo Kabushiki Kaisha · 1976
- Fluid-operated valve for pumps and the like14US 5,275,541 AKNF Neuberger GmbH · 1994
- Air conditioning reed valve support seat14US 5,884,665 AGeneral Motors Corporation · 1999
- Closing plate for a ring valve12US 4,164,238 AHoerbiger & Co. · 1979