F04C 14/20
By changing the form of the inner or outer contour of the
Official title: by changing the form of the inner or outer contour of the working chamber
F04C14/20 (By changing the form of the inner or outer contour of the) appears on 31 US grants and 22 published applications in this corpus.
Search patents in F04C- Granted patents
- 31
- Published applications
- 22
- Assignees
- 24
- Inventors
- 67
- Latest grant
- 31 Jan 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 2 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 2 | 1 |
| 2015 | 1 | 2 |
| 2016 | 0 | 1 |
| 2017 | 1 | 5 |
| 2018 | 3 | 2 |
| 2019 | 2 | 2 |
| 2020 | 1 | 1 |
| 2021 | 0 | 1 |
| 2022 | 2 | 0 |
| 2023 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Rotary pump driven medicament delivery device31 Jan 2023US 11,566,618 B2Medico Invest AG
- Rotary pump having an adjustable specific delivery volume and a pressure equalization surface3 Jan 2023US 11,542,940 B2Schwäbische Hüttenwerke Automotive GmbH
- Compressor and air conditioner13 Dec 2022US 11,525,446 B2Green Refrigeration Equipment Engineering Research Center of Zhuhai Gree Co., Ltd.
- Dual chamber and gear pump assembly for a high pressure delivery system12 Jul 2022US 11,383,025 B2Becton, Dickinson and Company
- Adjustable vane pump12 May 2020US 10,648,468 B2Joma-Polytec GmbH
- Rotary Pump Having an Adjustable Specific Delivery Volume and a Pressure Equalization Surface12 Aug 2021US 2021/0246899 A1Schwäbische Hüttenwerke Automotive GmbH
- Compressor and air conditioner17 Sep 2020US 2020/0291948 A1Green Refrigeration Equipment Engineering Research Center of Zhuhai Gree Co., Ltd.
- Dual chamber and gear pump assembly for a high pressure delivery system22 Aug 2019US 2019/0255250 A1Becton, Dickinson and Company
- Rotary pump driven medicament delivery device21 Mar 2019US 2019/0085843 A1Haselmeier AG
- Stiffness tuning and dynamic force balancing rotors of downhole drilling motors20 Sep 2018US 2018/0266181 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Hydraulic machine with wedge-shaped swashplate42US 5,423,183 AAdvanced Power Technology, Inc. · 1995
- Hydraulic motor and hydrostatic power transmission using such motor22US 4,503,928 ACompagnie de Construction Mecanique Sulzer · 1985
- Hydraulic vane pump with flexible band control21US 6,022,201 AKasmer Hydristor Corporation · 2000
- Variable displacement vane pump14US 4,439,117 AThe Bendix Corporation · 1984
- Infinitely variable vane-type hydraulic machine14US 5,839,889 AFolsom Technologies, Inc. · 1998