F04B 23/10
At least one pump being of the reciprocating positive-displacement type
Official title: at least one pump being of the reciprocating positive-displacement type
F04B23/10 (At least one pump being of the reciprocating positive-displacement type) appears on 198 US grants and 153 published applications in this corpus.
Search patents in F04B- Granted patents
- 198
- Published applications
- 153
- Assignees
- 108
- Inventors
- 334
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 2 |
| 2002 | 5 | 4 |
| 2003 | 5 | 12 |
| 2004 | 13 | 7 |
| 2005 | 4 | 2 |
| 2006 | 6 | 6 |
| 2007 | 7 | 3 |
| 2008 | 7 | 2 |
| 2009 | 2 | 5 |
| 2010 | 3 | 7 |
| 2011 | 4 | 6 |
| 2012 | 3 | 5 |
| 2013 | 5 | 13 |
| 2014 | 8 | 7 |
| 2015 | 9 | 12 |
| 2016 | 11 | 10 |
| 2017 | 8 | 9 |
| 2018 | 11 | 7 |
| 2019 | 8 | 7 |
| 2020 | 7 | 4 |
| 2021 | 10 | 5 |
| 2022 | 3 | 4 |
| 2023 | 5 | 4 |
| 2024 | 4 | 4 |
| 2025 | 7 | 4 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus for delivering metered fluid at elevated pressure22 Sep 2026US 12,742,443 B1Prince Sattam Bin Abdulaziz University
- Multi-pressure integrated air pump18 Aug 2026US 12,710,032 B2Intex Marketing Ltd.
- Single-motor, dual-hydraulic-circuit drive system for industrial materials-handling vehicle and method for controlling the same13 Jan 2026US 12,522,487 B2Hyster-Yale Materials Handling, Inc.
- Multipurpose inflation pump13 Jan 2026US 12,523,208 B2Jingyan Mechanical & Electrical Tools Co., Ltd, Jinhua
- Multi-pressure integrated air pump21 Oct 2025US 12,448,958 B2Intex Marketing Ltd.
- Accumulator for Prevention of Hydraulic Pump Cavitation19 Feb 2026US 2026/0049604 A1The Boeing Company
- Multi-pressure integrated air pump29 Jan 2026US 2026/0028973 A1Intex Marketing Ltd.
- Hydraulic unit with sequential piston pumps operated by rolling weights23 Oct 2025US 2025/0327444 A1
- Replaceable Cartridge for Coating System26 Jun 2025US 2025/0205726 A1Transitions Optical, Inc.
- Cementing equipment and control method19 Jun 2025US 2025/0198253 A1Yantai Jereh Petroleum Equipment & Technologies Co., Ltd.
Most cited
By later US patents
- Valve having opposed curved sealing surfaces on a valve member and a valve seat to facilitate effective sealing160US 10,094,366 B2National Oilwell Varco, L. P. · 2018
- Pump94US 6,332,393 B1Hydro-Gear Limited Partnership · 2001
- Dual pump apparatus comprising dual drive shafts and auxiliary pump78US 6,672,843 B1Hydro-Gear Limited Partnership · 2004
- Pump unit77US 6,425,244 B1Kanzaki Kokyukoki Mfg.Co., Ltd. · 2002
- Variable speed hydraulic pump75US 6,863,502 B2Actuant Corporation · 2005