F04B 53/122
The piston being free-floating
Official title: {the piston being free-floating, e.g. the valve being formed between the actuating rod and the piston}
F04B53/122 (The piston being free-floating) appears on 38 US grants and 17 published applications in this corpus.
Search patents in F04B- Granted patents
- 38
- Published applications
- 17
- Assignees
- 23
- Inventors
- 49
- Latest grant
- 27 Sep 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 2 |
| 2003 | 0 | 0 |
| 2004 | 1 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 3 |
| 2014 | 2 | 0 |
| 2015 | 1 | 0 |
| 2016 | 1 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mechanically actuated travelling plug valve27 Sep 2022US 11,454,234 B2
- Piston pump and seal ring25 May 2021US 11,015,595 B2Graco Minnesota Inc.
- Double acting refrigeration compressor3 Oct 2017US 9,777,717 B2Inficon GmbH
- Valveless reciprocating compressor6 Sep 2016US 9,435,322 B2GE Oil & Gas Compression Systems, LLC
- Lishanski's vibratory cavitation pump23 Jun 2015US 9,062,664 B2
- Low-pressure pump for hydrogen pumping system25 Jun 2026US 2026/0177052 A1FirstElement Fuel, Inc.
- Center rod plunger with clutch assembly28 Mar 2024US 2024/0102464 A1Epic Lift Systems
- Mechanically Actuated Travelling Plug Valve6 May 2021US 2021/0131424 A1
- Piston pump and seal ring17 Oct 2019US 2019/0316582 A1Graco Minnesota Inc.
- Double-acting refrigeration compressor27 Jul 2017US 2017/0211557 A1Inficon GmbH
Most cited
By later US patents
- Tubing pump system for pumping well fluids94US 5,765,639 AMuth Pump LLC · 1998
- Pump system and method for pumping well fluids89US 5,934,372 AMuth Pump LLC · 1999
- Methods and apparatuses for joining a pumping cartridge to a pump drive88US 7,337,538 B2HydroCision, Inc. · 2008
- High pressure pumping cartridges for medical and surgical pumping and infusion applications82US 7,717,685 B2HydroCision, Inc. · 2010
- Methods and apparatuses for joining a pumping cartridge to a pump drive45US 8,851,866 B2HydroCision, Inc. · 2014