B66D 1/24
For varying speed or reversing direction of rotation of drums or barrels
Official title: for varying speed or reversing direction of rotation of drums or barrels {, i.e. variable ratio or reversing gearing (B66D1/225 takes precedence)}
B66D1/24 (For varying speed or reversing direction of rotation of drums or barrels) appears on 30 US grants and 22 published applications in this corpus.
Search patents in B66D- Granted patents
- 30
- Published applications
- 22
- Assignees
- 22
- Inventors
- 63
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 3 |
| 2018 | 2 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 2 |
| 2021 | 0 | 0 |
| 2022 | 2 | 3 |
| 2023 | 1 | 3 |
| 2024 | 1 | 3 |
| 2025 | 3 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Rescue hoist cable foul protection15 May 2025US 2025/0153982 A1Hornet Acquisitionco, LLC
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Most cited
By later US patents
- Winch with free-wheeling drum30US 4,078,770 ACaterpillar Tractor Co. · 1978
- Safety winch with disengageable drive24US 4,489,919 A1984
- Multispeed winch18US 4,974,814 AMaxwell Marine Limited · 1990
- Portable winch10US 5,123,630 A1992
- Winch assembly with anti-fallback clutch9US 4,187,936 ACaterpillar Tractor Co. · 1980