F04D 29/12
Using sealing-rings
Official title: using sealing-rings
F04D29/12 (Using sealing-rings) appears on 608 US grants and 497 published applications in this corpus.
Search patents in F04D- Granted patents
- 608
- Published applications
- 497
- Assignees
- 349
- Inventors
- 1,319
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 0 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 6 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 10 | 0 |
| 1987 | 6 | 0 |
| 1988 | 7 | 0 |
| 1989 | 11 | 0 |
| 1990 | 12 | 0 |
| 1991 | 9 | 0 |
| 1992 | 16 | 0 |
| 1993 | 8 | 0 |
| 1994 | 15 | 0 |
| 1995 | 7 | 0 |
| 1996 | 11 | 0 |
| 1997 | 8 | 0 |
| 1998 | 11 | 0 |
| 1999 | 6 | 0 |
| 2000 | 10 | 0 |
| 2001 | 12 | 2 |
| 2002 | 15 | 6 |
| 2003 | 8 | 8 |
| 2004 | 7 | 9 |
| 2005 | 8 | 14 |
| 2006 | 9 | 9 |
| 2007 | 6 | 7 |
| 2008 | 5 | 9 |
| 2009 | 2 | 5 |
| 2010 | 10 | 14 |
| 2011 | 6 | 8 |
| 2012 | 4 | 13 |
| 2013 | 12 | 27 |
| 2014 | 9 | 30 |
| 2015 | 16 | 26 |
| 2016 | 26 | 37 |
| 2017 | 26 | 33 |
| 2018 | 28 | 34 |
| 2019 | 33 | 46 |
| 2020 | 40 | 33 |
| 2021 | 33 | 34 |
| 2022 | 32 | 28 |
| 2023 | 32 | 13 |
| 2024 | 27 | 18 |
| 2025 | 13 | 17 |
| 2026 | 12 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Compressor29 Sep 2026US 12,747,734 B2Mitsubishi Heavy Industries Compressor Corporation
- Compressor with integrated speed multiplier15 Sep 2026US 12,736,057 B2TURBODEN S. p. A.
- Electric centrifugal compressor8 Sep 2026US 12,729,690 B2Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Tandem seal pump8 Sep 2026US 12,729,692 B2Ceco Environmental IP Inc.
- Pump unit for a centrifugal pump and centrifugal pump25 Aug 2026US 12,716,422 B2Levitronix LLC
- Device for Forming a Sliding Bearing or a Slip-Ring Seal Having Integrated Temperature Measurement24 Sep 2026US 2026/0287012 A1KSB SE & Co. KGaA
- Compressor13 Aug 2026US 2026/0235136 A1Mitsubishi Heavy Industries Compressor 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.
- Compressor with integrated speed multiplier6 Aug 2026US 2026/0226904 A1TURBODEN S. p. A.
Most cited
By later US patents
- Centrifugal blood pump with impeller212US 4,589,822 AMICI Limited Partnership IV · 1986
- Method and apparatus for sterilization of a centrifugal pump126US 4,643,641 AMICI Limited Partnership IV · 1987
- High speed whirlpool pump121US 5,156,535 AITT Corporation · 1992
- Couplings for joining shafts120US 5,655,849 AHenry Filters, Inc. · 1997
- Face seal assembly118US 6,325,380 B1Feodor Burgmann Dichtungswerke GmbH & Co. · 2001