F04B 19/022
Reciprocating cylinders
Official title: {reciprocating cylinders}
F04B19/022 (Reciprocating cylinders) appears on 51 US grants and 31 published applications in this corpus.
Search patents in F04B- Granted patents
- 51
- Published applications
- 31
- Assignees
- 35
- Inventors
- 103
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 1 |
| 2003 | 2 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 3 |
| 2010 | 0 | 2 |
| 2011 | 2 | 0 |
| 2012 | 0 | 0 |
| 2013 | 2 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 2 | 2 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 2 | 2 |
| 2020 | 2 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 3 |
| 2023 | 1 | 2 |
| 2024 | 0 | 6 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pump mechanism with double reservoir and stationary fluid ports27 Jan 2026US 12,533,461 B2Insulet Corporation
- Fluid injection or suction device29 Apr 2025US 12,286,984 B2Fuji Filter Manufacturing Co., Ltd.
- Co-axial inverted piston linear actuator pumping system25 Apr 2023US 11,635,071 B2Schaeffler Technologies AG & Co. KG
- Piston pump for brake system23 Nov 2021US 11,181,102 B2Mando Corporation
- Hydraulic system and method for providing fluid pressure to hydraulically-powered systems16 Jun 2020US 10,683,858 B1
- Pump mechanism with double reservoir and stationary fluid ports16 Apr 2026US 2026/0102557 A1Insulet Corporation
- Liquid pumping device and liquid pumping and lid opening apparatus20 Nov 2025US 2025/0353720 A1Asia Ic Mic-Process, Inc.
- Reversible Reciprocating Pump22 Aug 2024US 2024/0280101 A1Quidnet Energy Inc.
- Soft serve ice cream pump assembly29 Feb 2024US 2024/0068467 A1Plum Creek Farm LLC
- Variable capacity reciprocating pump22 Feb 2024US 2024/0060485 A1
Most cited
By later US patents
- Reciprocating pump63US 4,174,194 A1979
- Positive displacement shuttle pump62US 5,044,900 AKnight Tool Company, Inc. · 1991
- Pumping apparatus for perfusion and other fluid catheterization procedures62US 5,529,463 ACordis Corporation · 1996
- Pumping system using solar energy37US 3,937,599 AAgence Nationale de Valorisation de la Recherche (ANVAR) · 1976
- Piston pump35US 6,126,418 ARobert Bosch GmbH · 2000