F15B 1/0275
With two or more pilot valves
Official title: {with two or more pilot valves, e.g. for independent setting of the cut-in and cut-out pressures}
F15B1/0275 (With two or more pilot valves) appears on 10 US grants and 8 published applications in this corpus.
Search patents in F15B- Granted patents
- 10
- Published applications
- 8
- Assignees
- 10
- Inventors
- 24
- Latest grant
- 26 Apr 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 2 |
| 2016 | 2 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- System for charging and discharging at least one hydraulic accumulator26 Apr 2022US 11,313,387 B2Hydac Fluidtechnik GmbH
- Self-contained pressure compensation system14 Jan 2020US 10,534,381 B2Xuzhou Construciton Machinery Group Co., Ltd.
- Energy-accumulation apparatus9 Aug 2016US 9,410,559 B2Hydrostor Inc.
- Energy recovery system having integrated boom/swing circuits22 Mar 2016US 9,290,912 B2Caterpillar Inc.
- Drive train of a mobile machine3 Nov 2015US 9,174,521 B2Linde Hydraulics GmbH & Co. KG
- System for charging and discharging at least one hydraulic accumulator14 Oct 2021US 2021/0317846 A1Hydac Fluidtechnik GmbH
- Self-contained pressure compensation system and control method thereof7 Sep 2017US 2017/0255210 A1Xuzhou Construction Machinery Group Co., Ltd.
- Energy-accumulation apparatus30 Jul 2015US 2015/0214815 A1Hydrostor Inc.
- Apparatus and method for hydraulic systems9 Jul 2015US 2015/0192149 A1Caterpillar Inc.
- Energy recovery system having integrated boom/swing circuits1 May 2014US 2014/0119867 A1Caterpillar Inc.
Most cited
By later US patents
- Non-leaking storage charging valve18US 5,373,865 AFlutec Fluidtechnische Gerate GmbH · 1994
- Energy-accumulation apparatus13US 9,410,559 B2Hydrostor Inc. · 2016
- Variable differential pressure unloading valve apparatus11US 4,114,637 ADouble A Products Company · 1978
- Energy recovery system having integrated boom/swing circuits11US 9,290,912 B2Caterpillar Inc. · 2016
- Shut-off valve6US 4,603,708 A1986