F15B 2211/7121
The chambers being connected in series
Official title: the chambers being connected in series
F15B2211/7121 (The chambers being connected in series) appears on 67 US grants and 57 published applications in this corpus.
Search patents in F15B- Granted patents
- 67
- Published applications
- 57
- Assignees
- 61
- Inventors
- 137
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 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 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 2 |
| 2003 | 1 | 4 |
| 2004 | 0 | 1 |
| 2005 | 4 | 2 |
| 2006 | 1 | 1 |
| 2007 | 1 | 3 |
| 2008 | 3 | 4 |
| 2009 | 3 | 1 |
| 2010 | 2 | 0 |
| 2011 | 2 | 5 |
| 2012 | 0 | 2 |
| 2013 | 3 | 4 |
| 2014 | 2 | 1 |
| 2015 | 3 | 4 |
| 2016 | 4 | 2 |
| 2017 | 2 | 2 |
| 2018 | 1 | 3 |
| 2019 | 2 | 1 |
| 2020 | 5 | 4 |
| 2021 | 2 | 3 |
| 2022 | 1 | 3 |
| 2023 | 3 | 2 |
| 2024 | 4 | 2 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Synchronized hybrid clamp force controller for lift truck attachment17 Mar 2026US 12,577,091 B2Cascade Corporation
- Backhoe loader energy recovery and reuse system and control method thereof, and backhoe loader25 Feb 2025US 12,234,625 B2Jiangsu Xcmg Construction Machinery Research Institute Ltd.
- Synchronized hybrid clamp force controller for lift truck attachment19 Nov 2024US 12,145,828 B2Cascade Corporation
- Systems and methods for bleed down and retraction of a construction machine boom7 May 2024US 11,976,675 B2Xtreme Manufacturing, LLC
- Hydraulic actuator with no friction and zero leakage, and its drive system19 Mar 2024US 11,933,327 B2Shandong University
- Synchronized hybrid clamp force controller for lift truck attachment6 Mar 2025US 2025/0074757 A1Cascade Corporation
- Backhoe loader energy recovery and reuse system and control method thereof, and backhoe loader17 Oct 2024US 2024/0344296 A1Jiangsu Xcmg Construction Machinery Research Institute Ltd.
- Hydraulic actuator with no friction and zero leakage, and its drive system22 Feb 2024US 2024/0060516 A1Shandong University
- Synchronized hybrid clamp force controller for lift truck attachment3 Aug 2023US 2023/0242388 A1Cascade Corporation
- Hydraulic serial rephasing circuits6 Apr 2023US 2023/0107516 A1Lippert Components, Inc.
Most cited
By later US patents
- Hydraulic actuator apparatus for a surgical table45US 6,886,200 B2Hill-Rom Services, Inc. · 2005
- Fluid-actuated clamping apparatus and circuit28US 3,990,594 ACascade Corporation · 1976
- Hydraulic system for controlling a gang of lawn mowers28US 3,992,858 AJacobsen Manufacturing Company · 1976
- Hydraulic drive vehicle27US 7,082,759 B12006
- Forklift truck side shifter24US 5,807,060 ARightline Equipment, Inc. · 1998