F15B 2211/45
Control of bleed-off flow
Official title: Control of bleed-off flow, e.g. control of bypass flow to the return line
F15B2211/45 (Control of bleed-off flow) appears on 453 US grants and 290 published applications in this corpus.
Search patents in F15B- Granted patents
- 453
- Published applications
- 290
- Assignees
- 198
- Inventors
- 715
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 9 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 8 | 0 |
| 1983 | 7 | 0 |
| 1984 | 6 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 8 | 0 |
| 1988 | 8 | 0 |
| 1989 | 6 | 0 |
| 1990 | 1 | 0 |
| 1991 | 8 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 14 | 0 |
| 2000 | 13 | 0 |
| 2001 | 19 | 3 |
| 2002 | 9 | 7 |
| 2003 | 5 | 12 |
| 2004 | 7 | 13 |
| 2005 | 12 | 14 |
| 2006 | 8 | 7 |
| 2007 | 10 | 19 |
| 2008 | 14 | 5 |
| 2009 | 6 | 5 |
| 2010 | 4 | 8 |
| 2011 | 8 | 8 |
| 2012 | 9 | 8 |
| 2013 | 7 | 8 |
| 2014 | 6 | 7 |
| 2015 | 4 | 18 |
| 2016 | 10 | 13 |
| 2017 | 14 | 10 |
| 2018 | 10 | 16 |
| 2019 | 20 | 10 |
| 2020 | 8 | 17 |
| 2021 | 24 | 19 |
| 2022 | 10 | 19 |
| 2023 | 18 | 13 |
| 2024 | 13 | 15 |
| 2025 | 21 | 12 |
| 2026 | 10 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Hydraulically powered power systems and hydraulic circuits having a flow valve and a hydraulic proportional bypass valve1 Jan 2026US 2026/0002549 A1Illinois Tool Works Inc.
- Energy recovery prevention for a hydraulic system18 Dec 2025US 2025/0382771 A1Caterpillar Inc.
Most cited
By later US patents
- Automotive hydraulic system and method for driving a hydraulic accessory in parallel with a power steering unit108US 6,073,536 A2000
- Systems and methods for energy storage and recovery using compressed gas96US 7,832,207 B2SustainX, Inc. · 2010
- Addressable valve arrays for proportional pressure or flow control88US 6,240,944 B1Honeywell International Inc. · 2001
- Hydraulic circuit with a return line metering valve and method of operation81US 6,467,264 B1HUSCO International, Inc. · 2002
- Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression73US 7,874,155 B2SustainX, Inc. · 2011