F04B 27/005
Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or
Official title: {with two cylinders}
F04B27/005 (Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or) appears on 109 US grants and 148 published applications in this corpus.
Search patents in F04B- Granted patents
- 109
- Published applications
- 148
- Assignees
- 87
- Inventors
- 254
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 2 | 1 |
| 2005 | 0 | 6 |
| 2006 | 1 | 2 |
| 2007 | 1 | 3 |
| 2008 | 1 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 4 |
| 2011 | 1 | 5 |
| 2012 | 2 | 2 |
| 2013 | 0 | 2 |
| 2014 | 1 | 6 |
| 2015 | 4 | 9 |
| 2016 | 3 | 8 |
| 2017 | 4 | 10 |
| 2018 | 8 | 16 |
| 2019 | 11 | 11 |
| 2020 | 10 | 6 |
| 2021 | 11 | 15 |
| 2022 | 6 | 10 |
| 2023 | 8 | 7 |
| 2024 | 5 | 7 |
| 2025 | 12 | 12 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Reciprocating piston pump18 Aug 2026US 12,710,033 B1Oshkosh Corporation
- Sound reduction device for rocking piston compressors4 Aug 2026US 12,698,765 B2Gast Manufacturing, Inc.
- Apparatus and method for engine control14 Jul 2026US 12,683,828 B2Vieletech Inc.
- Head module for air compressor and air compressor including same2 Jun 2026US 12,644,446 B2MDX Co., Ltd.
- Pressure multiplier31 Mar 2026US 12,590,593 B2Camozzi Automation S.P.A.
- Vapor recovery multi-stage common-rod hydraulic compressor16 Jul 2026US 2026/0201873 A1I-Jack Technologies Incorporated
- Modular Pump and Pump Modules for Modular Pumps16 Jul 2026US 2026/0201874 A1Oxus America, Inc.
- Compressor and sensor cleaning system including the same9 Jul 2026US 2026/0192781 A1Hyundai Motor Company
- Common-rod series hydraulic compressors29 Jan 2026US 2026/0028974 A1I-Jack Technologies Incorporated
- Head module for air compressor and air compressor including same18 Dec 2025US 2025/0382953 A1MDX Co., Ltd.
Most cited
By later US patents
- Piston mounting and balancing system115US 6,832,900 B2Thomas Industries, Inc. · 2004
- Method and equipment for improving the efficiency of compressors and refrigerators94US 10,961,995 B22021
- Automatic constant air flow rate pump unit for sampling air46US 5,163,818 AAmetek, Inc. · 1992
- Integrated compressor expander apparatus39US 6,283,723 B1Vairex Corporation · 2001
- Method of controlling gaseous fluid pump21US 9,695,806 B2Vbox, Incorporated · 2017