B66D 5/02
Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
B66D5/02 (Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes) appears on 513 US grants and 401 published applications in this corpus.
Search patents in B66D- Granted patents
- 513
- Published applications
- 401
- Assignees
- 259
- Inventors
- 934
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 9 | 0 |
| 1978 | 10 | 0 |
| 1979 | 7 | 0 |
| 1980 | 6 | 0 |
| 1981 | 8 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 14 | 0 |
| 1985 | 12 | 0 |
| 1986 | 7 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 11 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 6 | 0 |
| 1999 | 7 | 0 |
| 2000 | 9 | 0 |
| 2001 | 8 | 3 |
| 2002 | 6 | 5 |
| 2003 | 8 | 11 |
| 2004 | 6 | 9 |
| 2005 | 2 | 13 |
| 2006 | 12 | 16 |
| 2007 | 10 | 8 |
| 2008 | 6 | 13 |
| 2009 | 10 | 15 |
| 2010 | 12 | 15 |
| 2011 | 10 | 16 |
| 2012 | 10 | 11 |
| 2013 | 5 | 14 |
| 2014 | 13 | 17 |
| 2015 | 15 | 20 |
| 2016 | 15 | 16 |
| 2017 | 14 | 36 |
| 2018 | 32 | 28 |
| 2019 | 34 | 21 |
| 2020 | 15 | 29 |
| 2021 | 23 | 20 |
| 2022 | 20 | 23 |
| 2023 | 10 | 13 |
| 2024 | 20 | 7 |
| 2025 | 8 | 11 |
| 2026 | 6 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B66D 5/24Operating devices235
- B66D 5/12With axial effect148
- B66D 5/06With radial effect92
- B66D 5/16For action on ropes or cables64
- B66D 5/18For generating braking forces which are proportional to the loads suspended44
- B66D 5/04Actuated by centrifugal force35
- B66D 5/026Fluid-resistance brakes12
- B66D 5/023Cooling of brakes3
Recent patents
- Jaw engagement assist system2 Jun 2026US 12,643,202 B2The Charles Machine Works, Inc.
- Hoist system and process implementing an emergency stopping brake2 Jun 2026US 12,643,775 B2Breeze-Eastern LLC
- Electromagnetic brake24 Mar 2026US 12,584,530 B2Konecranes Global Corporation
- Brake static plate assembly, brake and elevator system10 Mar 2026US 12,570,498 B2Otis Elevator Company
- Pneumatic load balancing system and method3 Mar 2026US 12,565,407 B2Staccato Technologies AB
- Free Fall Winch8 Oct 2026US 2026/0307954 A1Liebherr-Components Biberach GmbH
- Brake wear detection30 Jul 2026US 2026/0217494 A1Otis Elevator Company
- Disc Brake for a Hoist, Combining a Positive Brake and a Negative Brake25 Jun 2026US 2026/0177121 A1Stromag France SAS
- Lifting assembly11 Jun 2026US 2026/0159322 A1Ocado Innovation Limited
- Gearless elevator drive system and elevator system comprising a gearless elevator drive system30 Apr 2026US 2026/0116706 A1Otis Elevator Company
Most cited
By later US patents
- Drilling rig drawworks hook load overspeed preventing system86US 4,434,971 AArmco Inc. · 1984
- Control system for drawworks operations74US 6,029,951 AVarco International, Inc. · 2000
- Slow descender including fluid and mechanical braking devices68US 3,946,989 A1976
- Eddy current retarder for use in emergency escape as from higher stories of a building59US 4,567,963 AKabushiki Kaisha Miyano Seisakusho · 1986
- Winch power transmission57US 4,545,567 AWarn Industries, Inc. · 1985