F04B 49/243
By keeping open the inlet valve
Official title: {by keeping open the inlet valve}
F04B49/243 (By keeping open the inlet valve) appears on 128 US grants and 99 published applications in this corpus.
Search patents in F04B- Granted patents
- 128
- Published applications
- 99
- Assignees
- 76
- Inventors
- 237
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 5 |
| 2003 | 6 | 6 |
| 2004 | 3 | 9 |
| 2005 | 2 | 0 |
| 2006 | 2 | 4 |
| 2007 | 2 | 5 |
| 2008 | 1 | 4 |
| 2009 | 8 | 13 |
| 2010 | 6 | 7 |
| 2011 | 3 | 1 |
| 2012 | 6 | 5 |
| 2013 | 4 | 5 |
| 2014 | 1 | 4 |
| 2015 | 5 | 4 |
| 2016 | 5 | 3 |
| 2017 | 5 | 4 |
| 2018 | 5 | 2 |
| 2019 | 2 | 4 |
| 2020 | 1 | 2 |
| 2021 | 4 | 2 |
| 2022 | 2 | 2 |
| 2023 | 1 | 1 |
| 2024 | 2 | 1 |
| 2025 | 2 | 4 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Electro-magnetic throttle valve with integrated blowdown conduit29 Jul 2025US 12,372,162 B2Ingersoll-Rand Industrial U.S., Inc.
- Controlling suction valves of a fluid pump28 May 2026US 2026/0146602 A1SPM Oil & Gas Inc.
- Connector structure of stepless capacity control actuator of reciprocating compressor7 May 2026US 2026/0126038 A1Beijing University of Chemical Technology
- Controlling suction valves of a fluid pump18 Dec 2025US 2025/0382956 A1SPM Oil & Gas Inc.
- Controlling suction valves of a fluid pump20 Nov 2025US 2025/0354546 A1SPM Oil & Gas Inc.
- Electro-magnetic throttle valve with integrated blowdown conduit6 Nov 2025US 2025/0341263 A1
Most cited
By later US patents
- Valve-seat interface architecture114US 8,317,498 B2Schlumberger Technology Corporation · 2012
- Low power electromagnetic pump55US 6,227,818 B1Wilson Greatbatch Ltd. · 2001
- Compressor inlet valve38US 4,362,475 AJoy Manufacturing Company · 1982
- Compressor valve lifter35US 5,634,492 AHoerbiger Ventilwerke Aktiengesellschaft · 1997
- Compressor inlet valve35US 5,785,081 AWestinghouse Air Brake Company · 1998