F15B 21/14
Energy-recuperation means
F15B21/14 (Energy-recuperation means) appears on 566 US grants and 603 published applications in this corpus.
Search patents in F15B- Granted patents
- 566
- Published applications
- 603
- Assignees
- 235
- Inventors
- 893
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 2 |
| 2002 | 8 | 7 |
| 2003 | 7 | 16 |
| 2004 | 12 | 12 |
| 2005 | 13 | 13 |
| 2006 | 12 | 17 |
| 2007 | 7 | 13 |
| 2008 | 11 | 23 |
| 2009 | 11 | 21 |
| 2010 | 11 | 14 |
| 2011 | 12 | 20 |
| 2012 | 14 | 17 |
| 2013 | 18 | 34 |
| 2014 | 22 | 48 |
| 2015 | 20 | 53 |
| 2016 | 47 | 37 |
| 2017 | 33 | 41 |
| 2018 | 38 | 33 |
| 2019 | 42 | 32 |
| 2020 | 35 | 26 |
| 2021 | 30 | 31 |
| 2022 | 27 | 29 |
| 2023 | 26 | 23 |
| 2024 | 23 | 12 |
| 2025 | 15 | 17 |
| 2026 | 14 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Control method based on a four-chamber hydraulic cylinder6 Oct 2026US 12,753,780 B2Taiyuan University of Technology
- Hybrid electro-hydraulic load sensing system and control method thereof15 Sep 2026US 12,736,067 B2Chongqing University
- Hydraulic drive device18 Aug 2026US 12,710,061 B2Kawasaki Jukogyo Kabushiki Kaisha
- Hydraulic distributor with pressure compensator for directional valves18 Aug 2026US 12,710,062 B2Walvoil S.P.A.
- Hydraulic system having a conditioning circuit4 Aug 2026US 12,698,788 B2Robert Bosch GmbH
- Fluid pressure circuit3 Sep 2026US 2026/0258821 A1Eagle Industry Co., Ltd.
- Mobile machine with improved electric powered actuator system6 Aug 2026US 2026/0226710 A1Moog Inc.
- Work machine6 Aug 2026US 2026/0226927 A1Komatsu Ltd.
- Integrated Electrohydraulic Actuator30 Jul 2026US 2026/0218734 A1Parker-Hannifin Corporation
- Dump truck23 Jul 2026US 2026/0208652 A1Komatsu Ltd.
Most cited
By later US patents
- Hydraulic system with cross function regeneration90US 6,502,393 B1HUSCO International, Inc. · 2003
- Regenerative adaptive fluid motor control77US 6,349,543 B12002
- Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression73US 7,874,155 B2SustainX, Inc. · 2011
- Energy recovery device69US 5,477,677 AHydac Technology GmbH · 1995
- Hydraulic energy storage systems66US 7,107,767 B2Shep Limited · 2006