F04D 29/14
Operative only when pump is inoperative
Official title: operative only when pump is inoperative
F04D29/14 (Operative only when pump is inoperative) appears on 66 US grants and 45 published applications in this corpus.
Search patents in F04D- Granted patents
- 66
- Published applications
- 45
- Assignees
- 47
- Inventors
- 140
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 2 |
| 2004 | 1 | 0 |
| 2005 | 2 | 2 |
| 2006 | 0 | 2 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 3 |
| 2012 | 1 | 0 |
| 2013 | 3 | 2 |
| 2014 | 2 | 3 |
| 2015 | 4 | 7 |
| 2016 | 1 | 4 |
| 2017 | 2 | 2 |
| 2018 | 2 | 0 |
| 2019 | 5 | 3 |
| 2020 | 2 | 4 |
| 2021 | 2 | 1 |
| 2022 | 4 | 2 |
| 2023 | 1 | 0 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electric centrifugal compressor8 Sep 2026US 12,729,690 B2Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Compressor arrangement and method of operating a compressor3 Dec 2024US 12,158,159 B2Nuovo Pignone Tecnologie Srl
- Sealing system11 Jul 2023US 11,698,080 B2Ebara Corporation
- Sealing system13 Sep 2022US 11,441,571 B2Ebara Corporation
- Shaft bearing device with a lifting device16 Aug 2022US 11,415,142 B2Sulzer Management AG
- Sealing system for hvac&r system17 Sep 2026US 2026/0275996 A1Tyco Fire & Security GmbH
- Dry gas seal system5 Feb 2026US 2026/0036207 A1John Crane Inc.
- Electric centrifugal compressor28 Mar 2024US 2024/0102479 A1Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Sealing system1 Dec 2022US 2022/0381258 A1Ebara Corporation
- Compressor arrangement and method of operating a compressor28 Jul 2022US 2022/0235789 A1Nuovo Pignone Tecnologie Srl
Most cited
By later US patents
- Automatic shut down seal control42US 5,772,214 ACarrier Corporation · 1998
- Drain pump for home appliances35US 7,758,323 B2BSH Bosch und Siemens Hausgeraete GmbH · 2010
- Gas compressor33US 6,607,348 B2Dresser-Rand Company · 2003
- Pump sealing apparatus32US 4,915,579 AA. R. Wilfley & Sons, Inc. · 1990
- Apparatus for delivery of fuel from a storage tank to an internal combustion engine of a vehicle19US 5,058,557 ARobert Bosch GmbH · 1991