F04D 13/0613
Special connection between the rotor compartments
Official title: {Special connection between the rotor compartments}
F04D13/0613 (Special connection between the rotor compartments) appears on 56 US grants and 47 published applications in this corpus.
Search patents in F04D- Granted patents
- 56
- Published applications
- 47
- Assignees
- 47
- Inventors
- 136
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 2 |
| 2016 | 0 | 5 |
| 2017 | 3 | 2 |
| 2018 | 2 | 2 |
| 2019 | 2 | 4 |
| 2020 | 4 | 3 |
| 2021 | 3 | 5 |
| 2022 | 5 | 2 |
| 2023 | 4 | 4 |
| 2024 | 3 | 2 |
| 2025 | 2 | 7 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Water pump housing structure28 Jul 2026US 12,692,876 B2Delta Electronics, Inc.
- Cooling component for automobile and manufacturing method of cooling component for automobile14 Jul 2026US 12,680,554 B2Yamada Manufacturing Co., Ltd.
- Pump device17 Mar 2026US 12,577,956 B2Nidec Instruments Corporation
- Pump device10 Mar 2026US 12,571,397 B2Zhejiang Sanhua Automotive Components Co., Ltd.
- Mechanical reverse rotation prevention device for canned motor pump16 Jul 2026US 2026/0201887 A1Hyosung Goodsprings, Inc.
- Fan module with detachable dual-fan assembly14 May 2026US 2026/0132796 A1Purple Cloud Development Pte. Ltd.
- Bearing retainer for pump and wet-operation pump unit having same5 Mar 2026US 2026/0063133 A1Shanghai Moons' Electric Co., Ltd.
- Pump unit for a centrifugal pump and a centrifugal pump30 Oct 2025US 2025/0334122 A1Levitronix LLC
- Water pump housing structure25 Sep 2025US 2025/0297618 A1Delta Electronics, Inc.
Most cited
By later US patents
- Magnetically driven centrifugal pump82US 4,047,847 AIwaki Co., Ltd. · 1977
- Fluid lubricated bearing assembly62US 3,960,468 AThe United States of America as represented by the United States Energy Research and Development Administration · 1976
- Electrically driven coolant pump for an internal combustion engine54US 5,785,013 APierburg GmbH · 1998
- Pump with fluid bearing46US 5,378,121 A1995
- Motor driven pump43US 5,129,795 APowerdyne, Inc. · 1992