F16H 39/00
Rotary fluid gearing using pumps and motors of the volumetric type, i.e.
Official title: Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution (control of exclusively fluid gearing F16H61/38)
F16H39/00 (Rotary fluid gearing using pumps and motors of the volumetric type, i.e.) appears on 728 US grants and 460 published applications in this corpus.
Search patents in F16H- Granted patents
- 728
- Published applications
- 460
- Assignees
- 189
- Inventors
- 882
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 3 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 11 | 0 |
| 1989 | 12 | 0 |
| 1990 | 19 | 0 |
| 1991 | 10 | 0 |
| 1992 | 5 | 0 |
| 1993 | 11 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 11 | 0 |
| 1997 | 13 | 0 |
| 1998 | 12 | 0 |
| 1999 | 8 | 0 |
| 2000 | 11 | 0 |
| 2001 | 14 | 5 |
| 2002 | 18 | 19 |
| 2003 | 17 | 11 |
| 2004 | 25 | 37 |
| 2005 | 24 | 28 |
| 2006 | 46 | 26 |
| 2007 | 27 | 36 |
| 2008 | 33 | 24 |
| 2009 | 21 | 19 |
| 2010 | 17 | 15 |
| 2011 | 18 | 5 |
| 2012 | 18 | 11 |
| 2013 | 12 | 12 |
| 2014 | 17 | 22 |
| 2015 | 15 | 16 |
| 2016 | 24 | 22 |
| 2017 | 26 | 26 |
| 2018 | 22 | 33 |
| 2019 | 42 | 19 |
| 2020 | 39 | 21 |
| 2021 | 24 | 11 |
| 2022 | 18 | 11 |
| 2023 | 11 | 8 |
| 2024 | 6 | 9 |
| 2025 | 10 | 6 |
| 2026 | 3 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydrostatic transaxle17 Mar 2026US 12,578,008 B2Kanzaki Kokyukoki Mfg.Co., Ltd.
- Hydrostatic rotating machine with radial pistons and with improved distribution17 Feb 2026US 12,553,501 B2Robert Bosch GmbH
- Hydraulic assembly device, system and method6 Jan 2026US 12,516,653 B2Gartech, LLC
- HST and transmission18 Nov 2025US 12,473,964 B2Kanzaki Kokyukoki Mfg.Co., Ltd.
- Hydrostatic traction drive for a laterally-steered vehicle and hydrostatic drive for a laterally-steered mobile work machine4 Nov 2025US 12,459,568 B2Robert Bosch GmbH
- Work vehicle13 Aug 2026US 2026/0231845 A1Kubota Corporation
- Hydraulic machine6 Aug 2026US 2026/0226967 A1Danfoss Scotland Limited
- Small displacement hydraulic actuator11 Jun 2026US 2026/0160278 A1Zhejiang Kc Mechanical & Electrical Co., Ltd.
- Hydraulic systems for a power machine7 May 2026US 2026/0126104 A1Doosan Bobcat North America, Inc.
- System for driving a hydraulic member23 Apr 2026US 2026/0110312 A1Poclain Hydraulics Industrie
Most cited
By later US patents
- Axle driving system130US 5,339,631 AKanzaki Kokyukoki Mfg.Co., Ltd. · 1994
- Drive system for a moving mechanism109US 4,100,822 A1978
- HST system axle driving apparatus103US 4,893,524 AKanzaki Kokyukoki Mfg.Co., Ltd. · 1990
- Hydrostatic transmission with fixed fluid capacity ratio between pump and motor102US 4,627,237 ASundstrand Corporation · 1986
- Axle driving apparatus100US 4,905,472 AKanzaki Kokyukoki Mfg.Co., Ltd. · 1990