F04B 1/0408
Pistons
F04B1/0408 (Pistons) appears on 278 US grants and 289 published applications in this corpus.
Search patents in F04B- Granted patents
- 278
- Published applications
- 289
- Assignees
- 142
- Inventors
- 518
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 7 | 2 |
| 2002 | 5 | 4 |
| 2003 | 4 | 4 |
| 2004 | 3 | 6 |
| 2005 | 4 | 4 |
| 2006 | 2 | 10 |
| 2007 | 1 | 5 |
| 2008 | 2 | 13 |
| 2009 | 5 | 10 |
| 2010 | 7 | 14 |
| 2011 | 10 | 10 |
| 2012 | 7 | 12 |
| 2013 | 11 | 13 |
| 2014 | 7 | 6 |
| 2015 | 7 | 15 |
| 2016 | 8 | 15 |
| 2017 | 10 | 20 |
| 2018 | 13 | 17 |
| 2019 | 20 | 8 |
| 2020 | 14 | 26 |
| 2021 | 11 | 8 |
| 2022 | 12 | 14 |
| 2023 | 18 | 18 |
| 2024 | 15 | 12 |
| 2025 | 16 | 15 |
| 2026 | 10 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Radial piston pump, method for operating a radial piston pump, and steering system15 Sep 2026US 12,736,036 B2Pump Technology Solutions PS GmbH
- Piston pump and method of manufacturing the same7 Jul 2026US 12,674,442 B2
- Fluid routing plug19 May 2026US 12,631,166 B2Kerr Machine Co.
- Fracturing pump arrangement using a plunger with an internal fluid passage28 Apr 2026US 12,612,904 B2Kerr Machine Co.
- Electric diaphragm pump with offset slider crank28 Apr 2026US 12,612,911 B2Ingersoll-Rand Industrial U.S., Inc.
- Lubricant pump system for hvac&r system8 Oct 2026US 2026/0309136 A1Tyco Fire & Security GmbH
- Fracturing pump arrangement using a plunger with an internal fluid passage3 Sep 2026US 2026/0258797 A1Kerr Machine Co.
- Stationary plunger packing25 Jun 2026US 2026/0177054 A1Halliburton Energy Services.Inc.
- Compression ring for a piston slipper arrangement, piston slipper arrangement, and axial piston machine30 Apr 2026US 2026/0117755 A1
- Fluid routing plug16 Apr 2026US 2026/0104039 A1Kerr Machine Co.
Most cited
By later US patents
- Pump gear99US 9,097,249 B2Bran & Luebbe GmbH · 2015
- Coupling arrangement providing an axial space between a plunger and plunger adaptor of a high pressure fluid pump75US 8,701,546 B2Gardner Denver Water Jetting Systems, Inc. · 2014
- Fluid end assembly57US 10,962,001 B2Kerr Machine Co. · 2021
- Fluid end assembly46US 10,670,013 B2Kerr Machine Co. · 2020
- Flexible manifold for reciprocating pump30US 11,261,863 B2Halliburton Energy Services.Inc. · 2022