F04D 13/062
Pressure compensation between motor- and pump- compartment
Official title: {pressure compensation between motor- and pump- compartment}
F04D13/062 (Pressure compensation between motor- and pump- compartment) appears on 47 US grants and 46 published applications in this corpus.
Search patents in F04D- Granted patents
- 47
- Published applications
- 46
- Assignees
- 38
- Inventors
- 87
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 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 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 2 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 3 | 5 |
| 2014 | 1 | 2 |
| 2015 | 0 | 4 |
| 2016 | 3 | 5 |
| 2017 | 1 | 3 |
| 2018 | 7 | 6 |
| 2019 | 4 | 2 |
| 2020 | 3 | 1 |
| 2021 | 3 | 3 |
| 2022 | 3 | 4 |
| 2023 | 3 | 1 |
| 2024 | 1 | 0 |
| 2025 | 3 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Bellows system for electrical submersible pump23 Jun 2026US 12,662,916 B1Halliburton Energy Services.Inc.
- Subsea fluid processing system having a canned fluid-filled stator and cooling mechanism14 Oct 2025US 12,442,375 B2OneSubsea IP UK Limited
- Subsea fluid processing system having a canned motor stator filled with a dielectric fluid29 Jul 2025US 12,372,090 B2OneSubsea IP UK Limited
- Fluid pressure compensation apparatus29 Jul 2025US 12,372,098 B2Eddy Pump Corporation
- Inverted closed bellows with lubricated guide ring support7 May 2024US 11,976,660 B2Baker Hughes Oilfield Operations LLC
- Fluid pressure compensation apparatus27 Feb 2025US 2025/0067267 A1Eddy Pump Corporation
- Modular compact pump3 Aug 2023US 2023/0243354 A1Vetco Gray Scandinavia.AS
- Blade and pump impeller assembly for a dishwasher6 Oct 2022US 2022/0313058 A1Whirlpool Corporation
- Submersible pump with barrier fluid isolation of motor lubricating liquid from pumped product6 Oct 2022US 2022/0316465 A1Flowserve Management Company
- Subsea electric fluid processing machine11 Aug 2022US 2022/0252070 A1OneSubsea IP UK Limited
Most cited
By later US patents
- Protector for electrical submersible pumps39US 6,688,860 B2Schlumberger Technology Corporation · 2004
- Pressure equalizing device for the electric motor of an encapsulated motor-pump assembly24US 4,614,482 AKlein, Schanzlin & Becker Aktiengesellschaft · 1986
- Protector for electrical submersible pumps24US 6,981,853 B2Schlumberger Technology Corporation · 2006
- Pump comprising a canned motor18US 4,465,437 AGrundfos A/S · 1984
- System and method for absorbing the expansion and contraction of internal fluids of a sumergible electric motor18US 6,201,327 B1Camco International Inc. · 2001