F04B 1/182
Check valves
F04B1/182 (Check valves) appears on 27 US grants and 33 published applications in this corpus.
Search patents in F04B- Granted patents
- 27
- Published applications
- 33
- Assignees
- 28
- Inventors
- 67
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 3 |
| 2018 | 1 | 3 |
| 2019 | 3 | 6 |
| 2020 | 2 | 0 |
| 2021 | 1 | 3 |
| 2022 | 4 | 3 |
| 2023 | 2 | 2 |
| 2024 | 3 | 2 |
| 2025 | 2 | 3 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rotary swash plate hydraulic pump15 Sep 2026US 12,736,037 B2Kawasaki Jukogyo Kabushiki Kaisha
- Axial pump with inclined plate16 Jun 2026US 12,655,842 B2Mixtron S.R.L.
- Rotary swash plate hydraulic pump19 May 2026US 12,631,165 B2Kawasaki Jukogyo Kabushiki Kaisha
- Rotary swash plate hydraulic pump24 Mar 2026US 12,584,467 B2Kawasaki Jukogyo Kabushiki Kaisha
- Piston pump having plastic material inlet valve insert part for a high pressure cleaning device3 Mar 2026US 12,565,888 B2Alfred Kärcher GmbH & Co. KG
- Active checked multiple displacer assembly1 Oct 2026US 2026/0298217 A1Graco Minnesota Inc.
- Piston pump of the type having at least three pumping chambers23 Jul 2026US 2026/0210343 A1Mixtron S.R.L.
- Rotary swash plate hydraulic pump1 Jan 2026US 2026/0002525 A1Kawasaki Jukogyo Kabushiki Kaisha
- Rotary swash plate hydraulic pump26 Jun 2025US 2025/0207570 A1Kawasaki Jukogyo Kabushiki Kaisha
- Wobble plate piston water pump for use in a low flow gas pressure washer or a low current electric pressure washer19 Jun 2025US 2025/0198398 A1Active Products Inc.
Most cited
By later US patents
- High pressure pumps having a check valve keeper and associated systems and methods14US 10,808,688 B1OMAX Corporation · 2020
- Fluid end block for frac pump11US 11,225,861 B1KHOLLE Magnolia 2015, LLC · 2022
- Piston type liquid fuel pump with an improved inlet valve4US 5,836,749 AChrysler Corporation · 1998
- Axial piston pump barrel with a cast high pressure collection cavity3US 6,682,315 B2Caterpillar Inc. · 2004
- Piston engaging with valve for self-priming in fluid sprayers2US 10,422,325 B2Grace Minnesota Inc. · 2019