F04D 29/128
With special means for adducting cooling or sealing fluid
Official title: {with special means for adducting cooling or sealing fluid}
F04D29/128 (With special means for adducting cooling or sealing fluid) appears on 146 US grants and 100 published applications in this corpus.
Search patents in F04D- Granted patents
- 146
- Published applications
- 100
- Assignees
- 108
- Inventors
- 313
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 0 |
| 2002 | 5 | 1 |
| 2003 | 0 | 2 |
| 2004 | 1 | 3 |
| 2005 | 1 | 5 |
| 2006 | 2 | 1 |
| 2007 | 2 | 1 |
| 2008 | 2 | 1 |
| 2009 | 0 | 0 |
| 2010 | 2 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 5 |
| 2013 | 3 | 1 |
| 2014 | 1 | 4 |
| 2015 | 1 | 2 |
| 2016 | 5 | 10 |
| 2017 | 4 | 10 |
| 2018 | 6 | 3 |
| 2019 | 7 | 6 |
| 2020 | 4 | 5 |
| 2021 | 5 | 6 |
| 2022 | 6 | 10 |
| 2023 | 10 | 5 |
| 2024 | 9 | 5 |
| 2025 | 4 | 4 |
| 2026 | 2 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Tandem seal pump8 Sep 2026US 12,729,692 B2Ceco Environmental IP Inc.
- Closed-loop cooling fluid circuit for magnetic bearings of an expander-compressor system24 Mar 2026US 12,584,420 B2Nuovo Pignone Tecnologie Srl
- Fluid coolers, heat exchangers, seal assemblies and systems including fluid coolers or heat exchangers and related methods2 Dec 2025US 12,487,036 B2Flowserve Pte. Ltd.
- Pump arrangement for pumping barrier liquid and a mechanical shaft seal30 Sep 2025US 12,429,062 B2Sulzer Management AG
- Electric submersible pump systems29 Jul 2025US 12,371,978 B2Schlumberger Technology Corporation
- Sealing arrangement, pump and method13 Aug 2026US 2026/0235137 A1Aalto University Foundation sr
- Shaft sealing device13 Aug 2026US 2026/0235208 A1Eagle Industry Co., Ltd.
- Pump system30 Jul 2026US 2026/0218719 A1Pentair Flow Technologies, LLC
- Sealing assembly and vertical pump/mixer comprising the sealing assembly18 Jun 2026US 2026/0166503 A1Sulzer Management AG
- Pump unit, pump system, and pump system operation method30 Apr 2026US 2026/0117782 A1Nikkiso Co., Ltd.
Most cited
By later US patents
- Environmentally safe pump including seal93US 5,499,902 AEnvironamics Corporation · 1996
- Impeller adjuster for centrifugal pump50US 4,439,096 AA. W. Chesterton Company · 1984
- Blood pump43US 5,399,145 ANikkiso Co., Ltd. · 1995
- Slurry pump shaft seal flushing37US 5,195,867 ABarrett, Haentjens & Co. · 1993
- Sealing and pumping means and methods environmentally leak-proof pump with misting chamber defined therein37US 5,340,273 AEnvironamics Corporation · 1994