F16D 31/00
Fluid couplings or clutches with pumping sets of the volumetric type, i.e.
Official title: Fluid couplings or clutches with pumping sets of the volumetric type, i.e. in the case of liquid passing a predetermined volume per revolution
F16D31/00 (Fluid couplings or clutches with pumping sets of the volumetric type, i.e.) appears on 371 US grants and 237 published applications in this corpus.
Search patents in F16D- Granted patents
- 371
- Published applications
- 237
- Assignees
- 140
- Inventors
- 502
- Latest grant
- 29 Aug 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 19 | 1 |
| 2002 | 21 | 16 |
| 2003 | 19 | 18 |
| 2004 | 10 | 17 |
| 2005 | 15 | 16 |
| 2006 | 27 | 27 |
| 2007 | 17 | 22 |
| 2008 | 24 | 17 |
| 2009 | 13 | 12 |
| 2010 | 12 | 10 |
| 2011 | 15 | 14 |
| 2012 | 10 | 9 |
| 2013 | 13 | 10 |
| 2014 | 16 | 10 |
| 2015 | 18 | 7 |
| 2016 | 8 | 3 |
| 2017 | 2 | 5 |
| 2018 | 3 | 5 |
| 2019 | 6 | 5 |
| 2020 | 10 | 7 |
| 2021 | 6 | 3 |
| 2022 | 4 | 3 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Integrated energy conversion, transfer and storage system29 Aug 2023US 11,742,663 B2A & A International, LLC
- Positive displacement pump including an unloading device18 Oct 2022US 11,473,574 B2Deere & Company
- Hydraulic clutches, gearboxes, transmissions, and energy recovery systems13 Sep 2022US 11,441,617 B2A & A International, LLC
- Hydraulic transaxle24 May 2022US 11,338,671 B2Kanzaki Kokyukoki Mfg.Co., Ltd.
- Gas purifying apparatus, gas purifying method and conveying heating apparatus8 Mar 2022US 11,266,925 B2Tamura Corporation
- Hydraulic clutches, gearboxes, transmissions, and energy recovery systems24 Nov 2022US 2022/0373041 A1A & A International, LLC
- Gas purifying apparatus, gas purifying method and conveying heating apparatus14 Apr 2022US 2022/0111305 A1Tamura Corporation
- Integrated energy conversion, transfer and storage system24 Feb 2022US 2022/0060022 A1A & A International, LLC
- Positive displacement pump including an unloading device26 Aug 2021US 2021/0262464 A1Deere & Company
- Hydraulic clutches, gearboxes, transmissions, and energy recovery systems6 May 2021US 2021/0129805 A1A & A International, LLC
Most cited
By later US patents
- Radial piston damped torsional coupling and machine using same114US 8,469,826 B2Caterpillar Inc. · 2013
- Hydrostatic transmission with fixed fluid capacity ratio between pump and motor102US 4,627,237 ASundstrand Corporation · 1986
- Pump unit77US 6,425,244 B1Kanzaki Kokyukoki Mfg.Co., Ltd. · 2002
- Axle driving apparatus74US 6,125,630 ATuff Torq Corporation · 2000
- Cylinder block brake for a hydrostatic drive apparatus64US 7,134,276 B1Hydro-Gear Limited Partnership · 2006