F03D 15/20
Gearless transmission, i.e. direct-drive
F03D15/20 (Gearless transmission, i.e. direct-drive) appears on 232 US grants and 297 published applications in this corpus.
Search patents in F03D- Granted patents
- 232
- Published applications
- 297
- Assignees
- 125
- Inventors
- 520
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 2 | 4 |
| 2007 | 3 | 7 |
| 2008 | 5 | 10 |
| 2009 | 3 | 6 |
| 2010 | 6 | 17 |
| 2011 | 16 | 29 |
| 2012 | 15 | 37 |
| 2013 | 22 | 39 |
| 2014 | 15 | 19 |
| 2015 | 26 | 31 |
| 2016 | 17 | 20 |
| 2017 | 15 | 6 |
| 2018 | 13 | 11 |
| 2019 | 6 | 10 |
| 2020 | 8 | 7 |
| 2021 | 7 | 6 |
| 2022 | 5 | 10 |
| 2023 | 11 | 6 |
| 2024 | 8 | 6 |
| 2025 | 7 | 5 |
| 2026 | 2 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Support apparatus for shaft system, and wind turbine27 Jan 2026US 12,535,059 B2Goldwind Science & Technology Co., Ltd.
- Direct-drive wind turbine20 Jan 2026US 12,529,360 B2
- Energy storage system14 Oct 2025US 12,442,358 B1Star Sailor Energy, Inc.
- Adjustable bearing assembly, in particular for wind turbines8 Jul 2025US 12,352,245 B2Flender GmbH
- Method for computer-implemented determination of control parameters of a turbine1 Jul 2025US 12,345,236 B2Siemens Gamesa Renewable Energy A/S
- Systems and methods for power generation or direct air capture30 Jul 2026US 2026/0218687 A1Innovator Energy, LLC
- Method, program and computer-readable medium for avoiding an unintended fall of a blade of a wind turbine, and energy conversion system23 Jul 2026US 2026/0210328 A1
- Wind turbine and method for constructing a wind turbine16 Jul 2026US 2026/0201869 A1Siemens Gamesa Renewable Energy A/S
- Fastening arrangement and wind turbine25 Jun 2026US 2026/0177033 A1ZF Friedrichshafen AG
- Fastening arrangement and wind turbine18 Jun 2026US 2026/0168479 A1ZF Friedrichshafen AG
Most cited
By later US patents
- Wind turbine and a shaft for a wind turbine1,094US 8,664,792 B2Envision Energy (Denmark) ApS · 2014
- Windmill114US 4,291,235 A1981
- Low-speed directly driven wind turbine109US 6,285,090 B1Jeumont Industrie · 2001
- Jet assisted counter rotating wind turbine98US 6,127,739 A2000
- Electrical generator system89US 6,476,513 B12002