F15B 13/015
Using an enclosed pilot flow valve
Official title: {using an enclosed pilot flow valve}
F15B13/015 (Using an enclosed pilot flow valve) appears on 93 US grants and 44 published applications in this corpus.
Search patents in F15B- Granted patents
- 93
- Published applications
- 44
- Assignees
- 53
- Inventors
- 148
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 2 | 0 |
| 2006 | 0 | 4 |
| 2007 | 2 | 0 |
| 2008 | 2 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 2 | 2 |
| 2012 | 0 | 2 |
| 2013 | 1 | 4 |
| 2014 | 2 | 0 |
| 2015 | 2 | 5 |
| 2016 | 2 | 2 |
| 2017 | 4 | 2 |
| 2018 | 1 | 1 |
| 2019 | 4 | 3 |
| 2020 | 4 | 3 |
| 2021 | 4 | 4 |
| 2022 | 1 | 1 |
| 2023 | 2 | 2 |
| 2024 | 5 | 3 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic control system and method with electro-proportional pressure valve and integral check5 May 2026US 12,618,424 B2HydraForce, Inc.
- Hydraulic valve and system27 May 2025US 12,310,896 B2Stryker Corporation
- Hydraulic valve assembly29 Oct 2024US 12,129,873 B2HAWE Hydraulik SE
- Hydraulic jack assemblies24 Sep 2024US 12,098,060 B1Roadtek Enterprises Inc.
- Valve assembly with preloaded control oil return23 Jul 2024US 12,044,323 B2Robert Bosch GmbH
- Hydraulic jack assemblies25 Sep 2025US 2025/0296823 A1Roadtek Enterprises Inc.
- Hydraulic control system for coupler safety knuckle31 Jul 2025US 2025/0243881 A1Cascade Corporation
- Hydraulic control system and method with electro-proportional pressure valve and integral check1 Aug 2024US 2024/0255008 A1HydraForce, Inc.
- Hydraulic valve and system14 Mar 2024US 2024/0082079 A1Stryker Corporation
- Hydraulic valve assembly1 Feb 2024US 2024/0035491 A1HAWE Hydraulik SE
Most cited
By later US patents
- Proportional control valve46US 4,623,118 ADeere & Company · 1986
- Pressure holding directional control valve37US 5,738,142 ACase Corporation · 1998
- Piloted valve34US 4,746,093 ASulzer Brothers Limited · 1988
- Low leakage orifice-controlled poppet valve33US 4,679,765 ADeere & Company · 1987
- Hydraulic circuit for cylinder27US 4,955,283 AKabushiki Kaisha Kobe Seiko Sho · 1990