F16H 61/40
Hydrostatic
Official title: hydrostatic
F16H61/40 (Hydrostatic) appears on 2,335 US grants and 1,558 published applications in this corpus.
Search patents in F16H- Granted patents
- 2,335
- Published applications
- 1,558
- Assignees
- 548
- Inventors
- 3,129
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 64 | 0 |
| 1977 | 34 | 0 |
| 1978 | 38 | 0 |
| 1979 | 18 | 0 |
| 1980 | 40 | 0 |
| 1981 | 18 | 0 |
| 1982 | 23 | 0 |
| 1983 | 19 | 0 |
| 1984 | 26 | 0 |
| 1985 | 32 | 0 |
| 1986 | 25 | 0 |
| 1987 | 30 | 0 |
| 1988 | 32 | 0 |
| 1989 | 29 | 0 |
| 1990 | 47 | 0 |
| 1991 | 35 | 0 |
| 1992 | 29 | 0 |
| 1993 | 34 | 0 |
| 1994 | 27 | 0 |
| 1995 | 21 | 0 |
| 1996 | 32 | 0 |
| 1997 | 30 | 0 |
| 1998 | 18 | 0 |
| 1999 | 30 | 0 |
| 2000 | 31 | 0 |
| 2001 | 42 | 17 |
| 2002 | 56 | 26 |
| 2003 | 39 | 38 |
| 2004 | 34 | 48 |
| 2005 | 43 | 44 |
| 2006 | 51 | 71 |
| 2007 | 48 | 63 |
| 2008 | 60 | 72 |
| 2009 | 47 | 81 |
| 2010 | 53 | 68 |
| 2011 | 58 | 51 |
| 2012 | 64 | 51 |
| 2013 | 76 | 93 |
| 2014 | 77 | 93 |
| 2015 | 70 | 96 |
| 2016 | 92 | 73 |
| 2017 | 86 | 62 |
| 2018 | 49 | 86 |
| 2019 | 96 | 67 |
| 2020 | 104 | 96 |
| 2021 | 78 | 54 |
| 2022 | 68 | 48 |
| 2023 | 47 | 59 |
| 2024 | 66 | 46 |
| 2025 | 49 | 31 |
| 2026 | 20 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F16H 61/42Involving adjustment of a pump or motor with adjustable output or capacity1,091
- F16H 61/46Automatic regulation in accordance with output requirements937
- F16H 61/44With more than one pump or motor in operation452
- F16H 61/4078Fluid exchange between hydrostatic circuits and external sources or consumers402
- F16H 61/4008Control of circuit pressure214
- F16H 61/4157Control of braking208
- F16H 61/4043Control of a bypass valve191
- F16H 61/4035Control of circuit flow139
All 15 subgroupsShow fewer
- F16H 61/4148Open loop circuits131
- F16H 61/4061Control related to directional control valves94
- F16H 61/4165Control of cooling or lubricating73
- F16H 61/4183Preventing or reducing vibrations or noise37
- F16H 61/4069Valves related to the control of neutral33
- F16H 61/4192Detecting malfunction or potential malfunction33
- F16H 61/4174Control of venting18
Recent patents
- Hydraulic system for work machine, and work machine15 Sep 2026US RE51,031 E1Kubota Corporation
- Hydrostatic pressure release apparatus for hydrostatic transmission8 Sep 2026US 12,729,778 B2MTD Products Inc
- Transmission apparatus25 Aug 2026US 12,716,476 B2Kanzaki Kokyukoki Mfg.Co., Ltd.
- Open hydraulic assistance system25 Aug 2026US 12,716,489 B2Poclain Hydraulics Industrie
- System for providing rotary power to implements of machines11 Aug 2026US 12,702,097 B2Caterpillar Inc.
- Work machine13 Aug 2026US 2026/0234906 A1Komatsu Ltd.
- Hydraulically powered power system for controlling input engine power or input motor power2 Jul 2026US 2026/0185544 A1Illinois Tool Works Inc.
- Hydraulic drive system25 Jun 2026US 2026/0177083 A1Hamm AG
- Hydraulically powered power systems for controlling variable displacement hydraulic pumps and variable displacement hydraulic motors11 Jun 2026US 2026/0160280 A1Illinois Tool Works Inc.
- Work machine and method for controlling work machine4 Jun 2026US 2026/0152155 A1Komatsu Ltd.
Most cited
By later US patents
- Hybrid propulsion system for road vehicles153US 6,170,587 B2Transport Energy Systems PTY LTD · 2001
- Hydraulic machine110US 6,358,174 B1Folsom Technologies, Inc. · 2002
- Hydraulic hybrid vehicle107US 6,719,080 B1The United States of America as represented by the Administrator of the Enviromental Protection Agency · 2004
- Utility vehicle driveline control method98US 5,575,737 ADeere & Company · 1996
- Hydrostatic transmission with interconnected swash plate neutral valve and brake unit97US 5,094,077 AKanzaki Kokyukoki Mfg.Co., Ltd. · 1992