F04B 27/08
Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or
Official title: having cylinders coaxial with, or parallel or inclined to, main shaft axis
F04B27/08 (Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or) appears on 1,873 US grants and 1,450 published applications in this corpus.
Search patents in F04B- Granted patents
- 1,873
- Published applications
- 1,450
- Assignees
- 361
- Inventors
- 1,991
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 11 | 0 |
| 1978 | 10 | 0 |
| 1979 | 7 | 0 |
| 1980 | 7 | 0 |
| 1981 | 15 | 0 |
| 1982 | 8 | 0 |
| 1983 | 16 | 0 |
| 1984 | 8 | 0 |
| 1985 | 14 | 0 |
| 1986 | 10 | 0 |
| 1987 | 20 | 0 |
| 1988 | 37 | 0 |
| 1989 | 44 | 0 |
| 1990 | 28 | 0 |
| 1991 | 43 | 0 |
| 1992 | 34 | 0 |
| 1993 | 33 | 0 |
| 1994 | 26 | 0 |
| 1995 | 34 | 0 |
| 1996 | 37 | 0 |
| 1997 | 39 | 0 |
| 1998 | 52 | 0 |
| 1999 | 62 | 0 |
| 2000 | 92 | 0 |
| 2001 | 103 | 64 |
| 2002 | 127 | 133 |
| 2003 | 123 | 124 |
| 2004 | 77 | 117 |
| 2005 | 51 | 100 |
| 2006 | 50 | 75 |
| 2007 | 39 | 61 |
| 2008 | 34 | 70 |
| 2009 | 20 | 73 |
| 2010 | 36 | 55 |
| 2011 | 27 | 39 |
| 2012 | 34 | 29 |
| 2013 | 29 | 43 |
| 2014 | 28 | 52 |
| 2015 | 35 | 87 |
| 2016 | 38 | 48 |
| 2017 | 61 | 48 |
| 2018 | 43 | 30 |
| 2019 | 27 | 41 |
| 2020 | 38 | 47 |
| 2021 | 33 | 45 |
| 2022 | 39 | 26 |
| 2023 | 30 | 22 |
| 2024 | 32 | 8 |
| 2025 | 14 | 8 |
| 2026 | 8 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Coulisse—eccentric motor21 Jul 2026US 12,687,157 B2
- Compressor assembly for an apparatus for inflating and/or repairing inflatable items or products as needed28 Apr 2026US 12,612,903 B2Illinois Tool Works Inc.
- Pressure actuated diaphragm pump21 Apr 2026US 12,607,181 B2
- Straight axis variable displacement piston pump with rotating swash plate14 Apr 2026US 12,601,333 B2Hamilton Sundstrand Corporation
- Method for producing a water-hydraulic machine24 Mar 2026US 12,584,470 B2Danfoss A/S
- Piston pump with pistons, crank rods, and ball joints17 Sep 2026US 2026/0275975 A1Lear Corporation
- Compressor10 Sep 2026US 2026/0266277 A1Sanden Corporation
- Reciprocating pump power end with monolithic core21 May 2026US 2026/0139668 A1Gd Energy Products, LLC
- Coulisse - eccentric motor2 Apr 2026US 2026/0092598 A1
- Common-rod series hydraulic compressors29 Jan 2026US 2026/0028974 A1I-Jack Technologies Incorporated
Most cited
By later US patents
- Reciprocating pistons of piston-type compressor121US 6,038,960 ASanden Corporation · 2000
- Piston type compressor with improved suction reed valve stopper116US 4,749,340 AKabushiki Kaisha Toyoda Jidoshokki Seisakusho · 1988
- Hybrid compressor and control method102US 6,230,507 B1Kabushiki Kaisha Toyoda Jidoshokki Seisakusho · 2001
- Positive displacement pump and operating method thereof90US 9,695,808 B2Mhwirth AS · 2017
- Variable displacement compressor control valve arrangement87US 4,428,718 AGeneral Motors Corporation · 1984