F15B 13/027
Check valves
Official title: {Check valves}
F15B13/027 (Check valves) appears on 162 US grants and 196 published applications in this corpus.
Search patents in F15B- Granted patents
- 162
- Published applications
- 196
- Assignees
- 133
- Inventors
- 420
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 4 |
| 2011 | 1 | 1 |
| 2012 | 1 | 2 |
| 2013 | 1 | 2 |
| 2014 | 2 | 4 |
| 2015 | 4 | 7 |
| 2016 | 2 | 12 |
| 2017 | 3 | 19 |
| 2018 | 13 | 24 |
| 2019 | 21 | 19 |
| 2020 | 20 | 14 |
| 2021 | 15 | 18 |
| 2022 | 14 | 17 |
| 2023 | 18 | 13 |
| 2024 | 17 | 16 |
| 2025 | 14 | 12 |
| 2026 | 10 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Integrated pump device16 Jun 2026US 12,655,857 B2Denso Corporation
- Electro-hydraulic actuator with a pilot-actuated float mode16 Jun 2026US 12,655,918 B2Parker-Hannifin Corporation
- Hydraulic pressure control unit19 May 2026US 12,630,131 B2Robert Bosch GmbH
- Hydraulic control system and method with electro-proportional pressure valve and integral check5 May 2026US 12,618,424 B2HydraForce, Inc.
- Motor load interface sealing arrangement21 Apr 2026US 12,607,173 B2Goodrich Actuation Systems Limited
- Motion Driven Filtration System6 Aug 2026US 2026/0226923 A1
- Three servovalve thrust reverser actuator system23 Jul 2026US 2026/0210311 A1
- Hydraulic control system for a sprayer boom on an agricultural field sprayer9 Jul 2026US 2026/0191181 A1Voith Patent GmbH
- Hydraulic drive system25 Jun 2026US 2026/0177083 A1Hamm AG
- Pilot operated blow-off valves for hydraulic actuators19 Mar 2026US 2026/0078778 A1ClearMotion, Inc.
Most cited
By later US patents
- Incompressible fluid injection apparatus32US 10,094,478 B2Caterpillar SARL and Others · 2018
- Pressure reducer and flow control valve23US 4,195,552 AMAC Valves, Inc. · 1980
- Monotube active suspension system having different system layouts for controlling pump flow distribution19US 10,434,835 B22019
- Flow compensated restrictive orifice for overrunning load protection18US 8,091,355 B2Clark Equipment Company · 2012
- Track tensioner13US 10,113,656 B2Clark Equipment Company · 2018