B66D 1/44
Pneumatic of hydraulic
Official title: pneumatic of hydraulic
B66D1/44 (Pneumatic of hydraulic) appears on 116 US grants and 47 published applications in this corpus.
Search patents in B66D- Granted patents
- 116
- Published applications
- 47
- Assignees
- 78
- Inventors
- 222
- Latest grant
- 22 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 6 | 0 |
| 1978 | 9 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 0 |
| 2003 | 2 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 3 | 5 |
| 2013 | 1 | 1 |
| 2014 | 2 | 2 |
| 2015 | 4 | 1 |
| 2016 | 0 | 2 |
| 2017 | 4 | 3 |
| 2018 | 0 | 4 |
| 2019 | 4 | 5 |
| 2020 | 7 | 5 |
| 2021 | 3 | 2 |
| 2022 | 3 | 2 |
| 2023 | 2 | 3 |
| 2024 | 3 | 4 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Winch drive device in crane22 Apr 2025US 12,280,990 B2Kobelco Construction Machinery Co., Ltd.
- Main hoist system of rotary drilling rig, and control method therefor17 Sep 2024US 12,091,293 B2Xuzhou Xugong Foundation Construction Machinery Co., Ltd.
- Valve assembly and hydraulic circuit13 Aug 2024US 12,060,950 B2Dana Motion Systems Italia S.R.L.
- Forestry winch30 Jul 2024US 12,049,391 B2Bernward Welschof
- Winch overload protection system12 Sep 2023US 11,753,880 B2Halliburton Energy Services.Inc.
- Winch control device and crane comprising same26 Mar 2026US 2026/0084938 A1Kobelco Construction Machinery Co., Ltd.
- Manual controller for indirectly controlling a fluid-operated lifting device, and fluid-operated lifting device17 Apr 2025US 2025/0122054 A1
- Stand-alone electronic control of winches28 Nov 2024US 2024/0391741 A1
- Winch20 Jun 2024US 2024/0199388 A1
- Winch18 Apr 2024US 2024/0124279 A1
Most cited
By later US patents
- Method and apparatus for controlling speed and direction of a vehicular towing winch and improvements in a towing winch34US 4,185,520 APACCAR Inc · 1980
- Winch with compact, high efficiency and high ratio gearing suitable for free fall32US 4,328,954 APettibone Corporation · 1982
- Vehicle supported winch30US 4,093,034 ACaterpillar Tractor Co. · 1978
- Multiple-speed winch or drum drive29US 4,453,430 APACCAR of Canada Ltd. · 1984
- Hydrostatic winch23US 4,187,681 ABucyrus-Erie Company · 1980