F04B 1/0439
Supporting or guiding means for the pistons
F04B1/0439 (Supporting or guiding means for the pistons) appears on 90 US grants and 118 published applications in this corpus.
Search patents in F04B- Granted patents
- 90
- Published applications
- 118
- Assignees
- 72
- Inventors
- 257
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 5 |
| 2005 | 1 | 1 |
| 2006 | 2 | 1 |
| 2007 | 2 | 7 |
| 2008 | 0 | 3 |
| 2009 | 1 | 4 |
| 2010 | 3 | 3 |
| 2011 | 2 | 6 |
| 2012 | 3 | 2 |
| 2013 | 0 | 3 |
| 2014 | 2 | 9 |
| 2015 | 2 | 11 |
| 2016 | 2 | 4 |
| 2017 | 6 | 2 |
| 2018 | 6 | 8 |
| 2019 | 7 | 4 |
| 2020 | 3 | 12 |
| 2021 | 7 | 9 |
| 2022 | 4 | 2 |
| 2023 | 4 | 8 |
| 2024 | 4 | 4 |
| 2025 | 2 | 7 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Fluid working machine21 Apr 2026US 12,607,172 B2Isuzu Motors Limited
- High-power five-cylinder drilling pump set, solid control system and drilling rig10 Mar 2026US 12,571,391 B2Sichuan Honghua Petroleum Equipment Co., Ltd.
- Gas supply pump for ship dual fuel engine3 Feb 2026US 12,540,591 B2Hd Korea Shipbuilding & Offshore Engineering Co., Ltd.
- Crosshead part and crosshead system for drilling pumps and the drilling pumps17 Jun 2025US 12,331,784 B2Sichuan Honghua Petroleum Equipment Co., Ltd.
- Gas supply pump for ship dual fuel engine21 May 2026US 2026/0139646 A1Hd Korea Shipbuilding & Offshore Engineering Co., Ltd.
- Split-type plunger pump and split-type plunger pump component4 Dec 2025US 2025/0369429 A1Yantai Jereh Oilfield Services Group Co., Ltd.
- Gas supply pump for ship dual fuel engine29 May 2025US 2025/0172132 A1Hyundai Heavy Industries Co., Ltd.
- Magnetic bearing for supporting an rc piston15 May 2025US 2025/0154984 A1Nuovo Pignone Tecnologie Srl
- Reciprocating plunger pump with bi-directional multi-component crankcase seal20 Mar 2025US 2025/0092949 A1A. W. Chesterton Company
Most cited
By later US patents
- 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
- Fuel pump for an internal combustion engine57US 6,951,165 B2Robert Bosch GmbH · 2005
- Pump system39US 10,247,184 B2Forum US, Inc. · 2019
- Cylinder liner retainer system with torque multiplier and method30US 10,436,193 B1Premium Oilfield Technologies, LLC · 2019
- Pump22US 9,677,548 B2Leuco S.P.A. · 2017