F15B 15/2838
With out using position sensors
Official title: {with out using position sensors, e.g. by volume flow measurement or pump speed}
F15B15/2838 (With out using position sensors) appears on 69 US grants and 71 published applications in this corpus.
Search patents in F15B- Granted patents
- 69
- Published applications
- 71
- Assignees
- 66
- Inventors
- 152
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 2 |
| 2002 | 1 | 2 |
| 2003 | 2 | 7 |
| 2004 | 6 | 1 |
| 2005 | 3 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 2 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 4 |
| 2014 | 1 | 1 |
| 2015 | 4 | 4 |
| 2016 | 3 | 7 |
| 2017 | 1 | 1 |
| 2018 | 3 | 4 |
| 2019 | 4 | 4 |
| 2020 | 5 | 2 |
| 2021 | 3 | 5 |
| 2022 | 2 | 1 |
| 2023 | 3 | 3 |
| 2024 | 3 | 4 |
| 2025 | 3 | 5 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic cylinder monitoring11 Aug 2026US 12,704,137 B2The Heil Co.
- Safety system for machine14 Apr 2026US 12,601,150 B2Oilquick AB
- Hydraulic isolation cylinder-based system24 Feb 2026US 12,560,182 B1SRI Energy, Inc.
- Regenerative pumping system and method27 Jan 2026US 12,535,087 B2Artificial Lift Production International Corp.
- System for detecting operation of a fluid pressure actuator1 Apr 2025US 12,264,693 B2Ckd Corporation
- Hydraulic Isolation Cylinder-Based System6 Aug 2026US 2026/0226921 A1SRI Energy, Inc.
- Contact estimation method, contact estimation program, and contact estimation device30 Jul 2026US 2026/0216889 A1Bridgestone Corporation
- Method for the detection of a position of an actuator element of a pneumatic actuator amid the use of a detection device, as well as a system of a pneumatic actuator and a detection device16 Jul 2026US 2026/0201912 A1Festo AG & Co.
- Cylinder device9 Apr 2026US 2026/0098549 A1Kosmek Ltd.
- Learning for controlling pneumatic driven positioning devices19 Mar 2026US 2026/0078779 A1VAT Holding AG
Most cited
By later US patents
- Lift truck control systems97US 4,942,529 AThe Raymond Corporation · 1990
- Bi-directional differential pressure flow sensor55US 6,725,731 B2Rosemount Inc. · 2004
- Hydraulic movement measuring system45US 6,520,008 B1Delaware Capital Formation, Inc. · 2003
- Actuator control system for hydraulic devices43US 6,925,807 B2Comprehensive Power, Inc. · 2005
- Piston position measuring device31US 6,817,252 B2Rosemount Inc. · 2004