F04B 1/0452
Distribution members
Official title: Distribution members, e.g. valves (machines or pumps with cam-actuated distribution members at the outer ends of the cylinders F04B1/0472; machines or pumps with cam-actuated distribution members at the inner ends of the cylinders F04B1/0531; the piston-driving cams being provided with inlets and outlets F04B1/0535)
F04B1/0452 (Distribution members) appears on 349 US grants and 344 published applications in this corpus.
Search patents in F04B- Granted patents
- 349
- Published applications
- 344
- Assignees
- 151
- Inventors
- 602
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 8 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 1 |
| 2002 | 3 | 7 |
| 2003 | 11 | 5 |
| 2004 | 3 | 7 |
| 2005 | 3 | 9 |
| 2006 | 1 | 7 |
| 2007 | 5 | 7 |
| 2008 | 6 | 9 |
| 2009 | 0 | 8 |
| 2010 | 8 | 13 |
| 2011 | 7 | 7 |
| 2012 | 7 | 9 |
| 2013 | 9 | 10 |
| 2014 | 13 | 13 |
| 2015 | 2 | 14 |
| 2016 | 11 | 18 |
| 2017 | 19 | 13 |
| 2018 | 8 | 16 |
| 2019 | 16 | 24 |
| 2020 | 21 | 23 |
| 2021 | 17 | 18 |
| 2022 | 24 | 17 |
| 2023 | 15 | 25 |
| 2024 | 24 | 24 |
| 2025 | 29 | 26 |
| 2026 | 18 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fluid end with transition surface geometry18 Aug 2026US 12,710,036 B2Gd Energy Products, LLC
- Fluid end with transition surface geometry18 Aug 2026US 12,710,038 B2Gd Energy Products, LLC
- Fluid end assembly18 Aug 2026US 12,710,039 B2Kerr Machine Co.
- Compact opposed pump19 May 2026US 12,631,164 B2Cummins-Scania HPCR System, LLC
- Fluid routing plug19 May 2026US 12,631,166 B2Kerr Machine Co.
- Lubricant pump system for hvac&r system8 Oct 2026US 2026/0309136 A1Tyco Fire & Security GmbH
- Fluid end17 Sep 2026US 2026/0275971 A1Kerr Machine Co.
- Fluid routing plug17 Sep 2026US 2026/0275972 A1Kerr Machine Co.
- Valve seat assemblies, valve assemblies, and fluid ends for high power pumps and related methods6 Aug 2026US 2026/0226987 A1Vulcan Industrial Holdings, LLC
- Compact opposed pump23 Jul 2026US 2026/0210342 A1Cummins-Scania HPCR System, LLC
Most cited
By later US patents
- Valve seats for use in fracturing pumps131US 9,822,894 B2S,P.M. Flow Control, Inc. · 2017
- Segmented fluid end124US 10,184,470 B22019
- Valve and seat assembly for a high pressure pump107US 9,631,739 B2Black Horse, LLC · 2017
- Pump assembly useful in internal combustion engines99US 6,669,453 B12003
- Injection molding system having a digital displacement pump98US 8,641,399 B2Husky Injection Molding Systems Ltd. · 2014