B63H 2023/323
Bearings for coaxial propeller shafts
Official title: {Bearings for coaxial propeller shafts, e.g. for driving propellers of the counter-rotative type}
B63H2023/323 (Bearings for coaxial propeller shafts) appears on 43 US grants and 19 published applications in this corpus.
Search patents in B63H- Granted patents
- 43
- Published applications
- 19
- Assignees
- 17
- Inventors
- 87
- Latest grant
- 22 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 4 |
| 2016 | 0 | 1 |
| 2017 | 2 | 0 |
| 2018 | 2 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 2 |
| 2021 | 3 | 2 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Counter rotating propeller pod mechanical arrangement22 Jul 2025US 12,365,438 B2GE Energy Power Conversion France
- Stern drive propeller hub assembly7 Jan 2025US 12,187,403 B1
- Boat shaft seal system23 May 2023US 11,655,014 B2Johnson Propeller Company
- Drive for a boat with electric motor4 Oct 2022US 11,459,075 B2Torqeedo GmbH
- Marine propulsion device and lower unit therefor7 Sep 2021US 11,111,849 B1Brunswick Corporation
- Marine drive unit15 Jan 2026US 2026/0015072 A1AB Volvo Penta
- Drive assembly for a marine dual-propeller drive unit12 Jun 2025US 2025/0187710 A1AB Volvo Penta
- Counter rotating propeller pod mechanical arrangement27 Jul 2023US 2023/0234691 A1GE Energy Power Conversion France
- Coaxial contra-rotating circumferential thruster9 Jun 2022US 2022/0177105 A1
- Drive for a Boat with Electric Motor22 Apr 2021US 2021/0114705 A1Torqeedo GmbH
Most cited
By later US patents
- Marine drive with dual propeller exhaust and lubrication33US 5,352,141 ABrunswick Corporation · 1994
- Marine contra-rotating propeller apparatus32US 4,642,059 AMitsubishi Jukogyo Kabushiki Kaisha · 1987
- Marine drive having two counter-rotating surfacing propellers and dual propeller shaft assembly32US 5,249,995 ABrunswick Corporation · 1993
- Marine dual propeller lower bore drive assembly29US 5,366,398 ABrunswick Corporation · 1994
- Marine drive lower unit with thrust bearing rotation control28US 4,795,382 ABrunswick Corporation · 1989