F04B 1/04
Multi-cylinder machines or pumps characterised by number or arrangement of cylinders: having
Official title: having cylinders in star- or fan-arrangement
F04B1/04 (Multi-cylinder machines or pumps characterised by number or arrangement of cylinders: having) appears on 1,658 US grants and 1,550 published applications in this corpus.
Search patents in F04B- Granted patents
- 1,658
- Published applications
- 1,550
- Assignees
- 575
- Inventors
- 2,613
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 29 | 0 |
| 1977 | 18 | 0 |
| 1978 | 14 | 0 |
| 1979 | 15 | 0 |
| 1980 | 6 | 0 |
| 1981 | 10 | 0 |
| 1982 | 16 | 0 |
| 1983 | 8 | 0 |
| 1984 | 16 | 0 |
| 1985 | 14 | 0 |
| 1986 | 14 | 0 |
| 1987 | 17 | 0 |
| 1988 | 12 | 0 |
| 1989 | 11 | 0 |
| 1990 | 18 | 0 |
| 1991 | 18 | 0 |
| 1992 | 13 | 0 |
| 1993 | 18 | 0 |
| 1994 | 21 | 0 |
| 1995 | 9 | 0 |
| 1996 | 13 | 0 |
| 1997 | 22 | 0 |
| 1998 | 19 | 0 |
| 1999 | 23 | 0 |
| 2000 | 20 | 0 |
| 2001 | 39 | 10 |
| 2002 | 38 | 32 |
| 2003 | 42 | 35 |
| 2004 | 33 | 47 |
| 2005 | 23 | 30 |
| 2006 | 20 | 39 |
| 2007 | 18 | 39 |
| 2008 | 19 | 42 |
| 2009 | 16 | 50 |
| 2010 | 32 | 48 |
| 2011 | 28 | 35 |
| 2012 | 35 | 51 |
| 2013 | 39 | 67 |
| 2014 | 34 | 65 |
| 2015 | 43 | 63 |
| 2016 | 50 | 75 |
| 2017 | 53 | 71 |
| 2018 | 50 | 86 |
| 2019 | 96 | 85 |
| 2020 | 79 | 95 |
| 2021 | 69 | 72 |
| 2022 | 83 | 75 |
| 2023 | 79 | 107 |
| 2024 | 76 | 92 |
| 2025 | 100 | 86 |
| 2026 | 70 | 53 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fuel pump15 Sep 2026US 12,736,034 B2Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Fluid end block and fluid end for a multiplex piston pump having multiple inlet passages15 Sep 2026US 12,736,035 B2
- Radial piston pump, method for operating a radial piston pump, and steering system15 Sep 2026US 12,736,036 B2Pump Technology Solutions PS GmbH
- Multi-part sealing assembly25 Aug 2026US 12,716,403 B2Gd Energy Products, LLC
- Fluid end with clamped retention25 Aug 2026US 12,716,495 B2Kerr Machine Co.
- Improved pressure adapter for hydraulic system8 Oct 2026US 2026/0309122 A1Poclain Hydraulics Industrie
- Improved multi-cylinder hydraulic machine8 Oct 2026US 2026/0309134 A1Poclain Hydraulics Industrie
- Lubricant pump system for hvac&r system8 Oct 2026US 2026/0309136 A1Tyco Fire & Security GmbH
- Long stroke parallel pump1 Oct 2026US 2026/0298218 A1National Oilwell Varco, L. P.
- Power end of reciprocating pump24 Sep 2026US 2026/0286955 A1Gd Energy Products, LLC
Most cited
By later US patents
- Pump drivetrain damper system and control systems and methods for same206US 10,316,832 B2S,P.M. Flow Control, Inc. · 2019
- Status monitoring and failure diagnosis system for plunger pump155US 11,047,379 B1American Jereh International Corporation · 2021
- Valve seats for use in fracturing pumps131US 9,822,894 B2S,P.M. Flow Control, Inc. · 2017
- Segmented fluid end124US 10,184,470 B22019
- Positive-displacement type pump system119US 5,167,493 ANissan Motor Co., Ltd. · 1992