B63H 23/321
Bearings or seals specially adapted for propeller shafts
Official title: {Bearings or seals specially adapted for propeller shafts}
B63H23/321 (Bearings or seals specially adapted for propeller shafts) appears on 305 US grants and 160 published applications in this corpus.
Search patents in B63H- Granted patents
- 305
- Published applications
- 160
- Assignees
- 138
- Inventors
- 495
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 9 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 9 | 0 |
| 1988 | 4 | 0 |
| 1989 | 9 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 15 | 0 |
| 1995 | 9 | 0 |
| 1996 | 8 | 0 |
| 1997 | 9 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 10 | 0 |
| 2001 | 7 | 6 |
| 2002 | 8 | 5 |
| 2003 | 6 | 6 |
| 2004 | 9 | 8 |
| 2005 | 6 | 6 |
| 2006 | 2 | 4 |
| 2007 | 3 | 5 |
| 2008 | 5 | 3 |
| 2009 | 2 | 3 |
| 2010 | 5 | 4 |
| 2011 | 1 | 6 |
| 2012 | 1 | 2 |
| 2013 | 6 | 10 |
| 2014 | 5 | 5 |
| 2015 | 5 | 11 |
| 2016 | 9 | 3 |
| 2017 | 3 | 10 |
| 2018 | 10 | 5 |
| 2019 | 7 | 3 |
| 2020 | 5 | 4 |
| 2021 | 6 | 10 |
| 2022 | 5 | 9 |
| 2023 | 9 | 9 |
| 2024 | 3 | 4 |
| 2025 | 8 | 12 |
| 2026 | 9 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B63H 2023/327Sealings specially adapted for propeller shafts or stern tubesIndexing code151
- B63H 2023/323Bearings for coaxial propeller shaftsIndexing code43
- B63H 23/326Water lubricated bearings37
- B63H 2023/325Thrust bearings, i.e. axial bearings for propeller shaftsIndexing code15
- B63H 2023/322Intermediate propeller shaft bearingsIndexing code10
Recent patents
- Arrangement and method for sealing a propeller shaft of a marine vessel8 Sep 2026US 12,728,975 B2ABB AB
- Arrangement and method for sealing a propeller shaft of a marine vessel18 Aug 2026US 12,709,372 B2ABB AB
- Gearcases for marine drives and methods of making gearcases for marine drives having reduced noise output30 Jun 2026US 12,668,345 B1Brunswick Corporation
- Wake boats having battery systems and electric propulsion devices for wake boats9 Jun 2026US 12,649,560 B1Brunswick Corporation
- Shaft contact device5 May 2026US 12,620,300 B2Waynedd Enterprises Ltd
- Shaft bearing8 Oct 2026US 2026/0307773 A1thyssenkrupp AG
- Ring-shaped or tubular component, in particular a stern bush tube of a watercraft, and method for producing such a component24 Sep 2026US 2026/0285464 A1
- Electric outboard motor6 Aug 2026US 2026/0225705 A1Suzuki Motor Corporation
- Pod propulsion unit23 Jul 2026US 2026/0208844 A1ABB AB
- Propeller assembly for a boat28 May 2026US 2026/0145770 A1MasterCraft Boat Company, LLC
Most cited
By later US patents
- Marine jet drive48US 5,421,753 A1995
- Embedded wear sensor47US 6,080,982 AThe United States of America as represented by the Secretary of the Navy · 2000
- Pressure insensitive lip seal45US 4,344,631 AMechanical Technology Incorporated · 1982
- Sealing apparatus for rotating shafts, in particular stern tube seal for the propeller shaft of a ship43US 5,267,736 ABlohm & Voss AG · 1993
- Propeller shaft liner and inserting apparatus42US 4,014,184 A1977