F04C 23/005
Combinations of two or more pumps, each being of rotary-piston or oscillating-piston
Official title: {of dissimilar working principle}
F04C23/005 (Combinations of two or more pumps, each being of rotary-piston or oscillating-piston) appears on 176 US grants and 188 published applications in this corpus.
Search patents in F04C- Granted patents
- 176
- Published applications
- 188
- Assignees
- 105
- Inventors
- 410
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 4 | 7 |
| 2004 | 2 | 4 |
| 2005 | 0 | 4 |
| 2006 | 1 | 5 |
| 2007 | 2 | 4 |
| 2008 | 1 | 7 |
| 2009 | 3 | 11 |
| 2010 | 6 | 17 |
| 2011 | 4 | 10 |
| 2012 | 14 | 7 |
| 2013 | 9 | 5 |
| 2014 | 7 | 7 |
| 2015 | 9 | 15 |
| 2016 | 3 | 11 |
| 2017 | 8 | 11 |
| 2018 | 10 | 9 |
| 2019 | 9 | 4 |
| 2020 | 4 | 11 |
| 2021 | 6 | 11 |
| 2022 | 9 | 4 |
| 2023 | 6 | 9 |
| 2024 | 9 | 4 |
| 2025 | 8 | 6 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Cartridge style front cover and coupling cavity sleeve for automotive supercharger31 Mar 2026US 12,590,585 B2Eaton Intelligent Power Limited
- Dual-mode compressor10 Mar 2026US 12,571,392 B2Beijing Institute of Technology
- Rotary screw compressor13 Jan 2026US 12,523,227 B2Ingersoll-Rand Industrial U.S., Inc.
- Systems and methods for mobile compression8 Oct 2026US 2026/0309154 A1Artemis Production Solutions, Inc.
- Scroll compressor1 Oct 2026US 2026/0298234 A1Ishikawa Energy Research Co., Ltd.
- Air compressor having vacuum and associated methods for loading and extracting materials23 Apr 2026US 2026/0110299 A1Industrial Vacuum Transfer Services USA, LLC
- Hybrid compressor22 Jan 2026US 2026/0022702 A1Garrett Transportation I Inc.
- Two-Stage Pump27 Nov 2025US 2025/0361864 A1Truma Gerätetechnik GmbH & Co. KG
Most cited
By later US patents
- Fluid rotating apparatus61US 5,197,861 AMatsushita Electric Industrial Co., Ltd. · 1993
- Evacuating apparatus40US 5,709,537 AMatsushita Electric Industrial Co., Ltd. · 1998
- Rotary type fluid machine, vane type fluid machine, and waste heat recovering device for internal combustion engine40US 6,675,765 B2Honda Giken Kogyo Kabushiki Kaisha · 2004
- Vacuum evacuation system37US 4,797,068 AHitachi, Ltd. · 1989
- Three stage scroll vacuum pump34US 9,028,230 B2Air Squared, Inc. · 2015