F04B 41/00
Pumping installations or systems specially adapted for elastic fluids
Official title: Pumping installations or systems specially adapted for elastic fluids (free-piston pumps specially adapted for elastic fluids or systems incorporating such pumps F04B31/00; piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for F04B35/00)
F04B41/00 (Pumping installations or systems specially adapted for elastic fluids) appears on 1,005 US grants and 1,196 published applications in this corpus.
Search patents in F04B- Granted patents
- 1,005
- Published applications
- 1,196
- Assignees
- 588
- Inventors
- 2,144
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 3 | 0 |
| 1978 | 9 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 9 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 11 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 10 | 0 |
| 2001 | 11 | 2 |
| 2002 | 9 | 11 |
| 2003 | 22 | 21 |
| 2004 | 11 | 30 |
| 2005 | 10 | 23 |
| 2006 | 12 | 30 |
| 2007 | 8 | 24 |
| 2008 | 9 | 30 |
| 2009 | 13 | 35 |
| 2010 | 14 | 29 |
| 2011 | 24 | 29 |
| 2012 | 28 | 40 |
| 2013 | 21 | 52 |
| 2014 | 31 | 44 |
| 2015 | 33 | 64 |
| 2016 | 32 | 56 |
| 2017 | 35 | 59 |
| 2018 | 46 | 90 |
| 2019 | 71 | 78 |
| 2020 | 73 | 77 |
| 2021 | 72 | 69 |
| 2022 | 66 | 74 |
| 2023 | 63 | 80 |
| 2024 | 64 | 63 |
| 2025 | 68 | 52 |
| 2026 | 31 | 34 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Gas compression system and control method thereof25 Aug 2026US 12,716,410 B2Hitachi Industrial Equipment Systems Co., Ltd.
- Multi-pressure integrated air pump18 Aug 2026US 12,710,032 B2Intex Marketing Ltd.
- Throttle valve for coolant circulation system18 Aug 2026US 12,710,056 B2Ingersoll-Rand Industrial U.S., Inc.
- Method and system for efficient hydrogen compression11 Aug 2026US 12,704,116 B2Nuovo Pignone Tecnologie Srl
- Systems and apparatuses for portable air distribution28 Jul 2026US 12,692,854 B2Studsvik, Inc.
- Monitoring system and monitoring method8 Oct 2026US 2026/0309148 A1Fuji Corporation
- Systems and methods for mobile compression8 Oct 2026US 2026/0309154 A1Artemis Production Solutions, Inc.
- Vacuum pump1 Oct 2026US 2026/0299394 A1Pfeiffer Vacuum GmbH
- Pump delivery tool and delivery method for vacuum pump using the same13 Aug 2026US 2026/0235119 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Compressor unit6 Aug 2026US 2026/0226891 A1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
Most cited
By later US patents
- Portable, battery-powered air compressor for a pneumatic tool system1,047US 7,225,959 B2Black & Decker Inc. · 2007
- Multiple compressor controller and method139US 4,502,842 AColt Industries Operating Corp. · 1985
- Fluid pump speed controller136US 6,045,331 A2000
- Compressor for high pressure polymerization128US 7,563,413 B2ExxonMobil Chemical Patents Inc. · 2009
- Method and apparatus for compressing gases109US 4,515,516 AChampion, Perrine & Associates · 1985