F15B 13/0403
A secondary valve member sliding within the main spool
Official title: {a secondary valve member sliding within the main spool, e.g. for regeneration flow (F15B13/0418 takes precedence)}
F15B13/0403 (A secondary valve member sliding within the main spool) appears on 64 US grants and 49 published applications in this corpus.
Search patents in F15B- Granted patents
- 64
- Published applications
- 49
- Assignees
- 58
- Inventors
- 135
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 2 |
| 2004 | 0 | 2 |
| 2005 | 3 | 3 |
| 2006 | 1 | 2 |
| 2007 | 1 | 1 |
| 2008 | 2 | 1 |
| 2009 | 1 | 4 |
| 2010 | 0 | 2 |
| 2011 | 2 | 1 |
| 2012 | 1 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
| 2015 | 3 | 6 |
| 2016 | 0 | 0 |
| 2017 | 4 | 3 |
| 2018 | 3 | 1 |
| 2019 | 1 | 4 |
| 2020 | 2 | 3 |
| 2021 | 2 | 2 |
| 2022 | 4 | 2 |
| 2023 | 1 | 3 |
| 2024 | 2 | 0 |
| 2025 | 0 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Direct drive valve20 Mar 2025US 2025/0092960 A1Microtecnica S.R.L.
Most cited
By later US patents
- Pressure regulator36US 5,571,248 AGeneral Motors Corporation · 1996
- Pressure regulating valve29US 4,643,225 AMannesmann Rexroth GmbH · 1987
- Proportional power control valve22US 6,021,997 AFlutec Fluidtechnische Gerate GmbH · 2000
- Proportional pressure reducing and relieving valve21US 5,377,720 AApplied Power Inc. · 1995
- Four-way valve with internal pilot20US 4,526,201 ASpectra-Physics, Inc. · 1985