B63H 23/34
Propeller shafts
Official title: Propeller shafts; Paddle-wheel shafts; Attachment of propellers on shafts
B63H23/34 (Propeller shafts) appears on 330 US grants and 228 published applications in this corpus.
Search patents in B63H- Granted patents
- 330
- Published applications
- 228
- Assignees
- 126
- Inventors
- 537
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 8 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 9 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 2 |
| 2002 | 10 | 5 |
| 2003 | 8 | 12 |
| 2004 | 12 | 7 |
| 2005 | 5 | 4 |
| 2006 | 5 | 6 |
| 2007 | 2 | 1 |
| 2008 | 3 | 5 |
| 2009 | 4 | 4 |
| 2010 | 3 | 3 |
| 2011 | 1 | 4 |
| 2012 | 3 | 3 |
| 2013 | 6 | 4 |
| 2014 | 4 | 11 |
| 2015 | 5 | 11 |
| 2016 | 9 | 2 |
| 2017 | 8 | 11 |
| 2018 | 7 | 7 |
| 2019 | 7 | 11 |
| 2020 | 7 | 8 |
| 2021 | 13 | 13 |
| 2022 | 17 | 37 |
| 2023 | 21 | 26 |
| 2024 | 24 | 12 |
| 2025 | 31 | 9 |
| 2026 | 12 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B63H 2023/342Comprising couplingsIndexing code84
- B63H 2023/344Comprising flexible shafts membersIndexing code14
- B63H 2023/346Comprising hollow shaft membersIndexing code9
- B63H 23/35Shaft braking or locking, i.e. means to slow or stop the rotation7
- B63H 2023/348With turning or inching gear, i.e. with means for slowly rotating, orIndexing code2
Recent patents
- Outboard motor6 Oct 2026US 12,752,902 B2Yamaha Hatsudoki Kabushiki Kaisha
- Arrangement and method for sealing a propeller shaft of a marine vessel8 Sep 2026US 12,728,975 B2ABB AB
- Propeller assembly7 Jul 2026US 12,674,393 B1PARTS KOREA Co., Ltd
- Gearcases for marine drives and methods of making gearcases for marine drives having reduced noise output30 Jun 2026US 12,668,345 B1Brunswick Corporation
- Outboard motor and marine vessel21 Apr 2026US 12,606,287 B2Yamaha Hatsudoki Kabushiki Kaisha
- Apparatus and methods for ship propeller shaft removal10 Sep 2026US 2026/0264819 A1Vigor Industrial LLC
- Electric Propulsion Device for Surfboard with Flexible Shaft Drive27 Aug 2026US 2026/0249960 A1Boost Surf, Inc.
- Watercraft27 Aug 2026US 2026/0249973 A1Kawasaki Motors, Ltd.
- Systems and methods for optimizing driveshaft coupling of marine propulsion device9 Jul 2026US 2026/0192905 A1Brunswick Corporation
- Propeller assembly for a boat28 May 2026US 2026/0145770 A1MasterCraft Boat Company, LLC
Most cited
By later US patents
- Marine propeller with breakaway hub297US 5,201,679 AAttwood Corporation · 1993
- Drive shaft coupling111US 5,154,652 A1992
- Shock absorbing clutch assembly for marine propeller49US 4,566,855 A1986
- Multi-stage pump powered by integral canned motors43US 5,713,727 AWestinghouse Electric Corp. · 1998
- Propeller and coupling member39US 4,842,483 A1989