F04B 7/0042
Piston machines or pumps characterised by having positively-driven valving: with specific kinematics
Official title: {with specific kinematics of the distribution member (F04B7/0003, F04B7/0019 take precedence)}
F04B7/0042 (Piston machines or pumps characterised by having positively-driven valving: with specific kinematics) appears on 90 US grants and 98 published applications in this corpus.
Search patents in F04B- Granted patents
- 90
- Published applications
- 98
- Assignees
- 75
- Inventors
- 210
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 1 |
| 2011 | 0 | 5 |
| 2012 | 1 | 3 |
| 2013 | 1 | 2 |
| 2014 | 2 | 3 |
| 2015 | 7 | 2 |
| 2016 | 0 | 4 |
| 2017 | 1 | 4 |
| 2018 | 6 | 6 |
| 2019 | 4 | 10 |
| 2020 | 10 | 16 |
| 2021 | 5 | 6 |
| 2022 | 9 | 12 |
| 2023 | 8 | 9 |
| 2024 | 7 | 9 |
| 2025 | 7 | 2 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for operating a construction-material and/or viscous-material pump for conveying construction material and/or viscous material, and construction-material and/or viscous-material pump for conveying construction material and/or viscous material28 Jul 2026US 12,692,860 B2Putzmeister Engineering GmbH
- Mode selection valve for RAT re-stow pump14 Apr 2026US 12,601,345 B2Hamilton Sundstrand Corporation
- Valve shaft pump with coordinated pumping and valving operations10 Feb 2026US 12,544,504 B2Becton, Dickinson and Company
- Disposable medical flow-regulating device and system16 Sep 2025US 12,415,023 B2NxStage Medical, Inc.
- Electro-magnetic throttle valve with integrated blowdown conduit29 Jul 2025US 12,372,162 B2Ingersoll-Rand Industrial U.S., Inc.
- Method for determining a leak rate in a displacement pump18 Dec 2025US 2025/0382957 A1Tecan Trading AG
- Electro-magnetic throttle valve with integrated blowdown conduit6 Nov 2025US 2025/0341263 A1
- System and method of using oscillator to create pulsing waves14 Nov 2024US 2024/0376793 A1GTherm Energy, Inc.
- Assembly for and method of dispensing a liquid7 Nov 2024US 2024/0367192 A1Fast & Fluid Managment B.V.
- Electro-magnetic throttle valve3 Oct 2024US 2024/0328530 A1Ingersoll-Rand Industrial U.S., Inc.
Most cited
By later US patents
- Flow metering cassette and controller403US 4,303,376 ABaxter Travenol Laboratories, Inc. · 1981
- Mechanical drive system for a medication infusion system140US 4,850,817 APacesetter Infusion, Ltd. · 1989
- Reverse osmosis method and apparatus88US 4,187,173 A1980
- Rotary shaft driven reverse osmosis method and apparatus83US 4,288,326 A1981
- Liquid metering pump25US 4,236,881 AEcodyne Corporation · 1980