B66D 3/04
Pulley blocks or like devices in which force is applied to a
Official title: Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage (sheaves F16H55/00)
B66D3/04 (Pulley blocks or like devices in which force is applied to a) appears on 390 US grants and 318 published applications in this corpus.
Search patents in B66D- Granted patents
- 390
- Published applications
- 318
- Assignees
- 206
- Inventors
- 627
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 4 | 0 |
| 1978 | 10 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 9 | 0 |
| 2000 | 10 | 0 |
| 2001 | 8 | 1 |
| 2002 | 4 | 2 |
| 2003 | 8 | 6 |
| 2004 | 2 | 6 |
| 2005 | 11 | 11 |
| 2006 | 3 | 8 |
| 2007 | 7 | 10 |
| 2008 | 10 | 11 |
| 2009 | 14 | 14 |
| 2010 | 9 | 6 |
| 2011 | 9 | 11 |
| 2012 | 4 | 12 |
| 2013 | 9 | 17 |
| 2014 | 9 | 13 |
| 2015 | 14 | 10 |
| 2016 | 6 | 9 |
| 2017 | 8 | 11 |
| 2018 | 13 | 18 |
| 2019 | 21 | 17 |
| 2020 | 20 | 23 |
| 2021 | 19 | 28 |
| 2022 | 18 | 23 |
| 2023 | 17 | 12 |
| 2024 | 19 | 15 |
| 2025 | 10 | 11 |
| 2026 | 6 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Modular pulley block22 Sep 2026US 12,741,853 B2ROPE Savers LLC
- Block and tackle assembly for bladder anchor17 Mar 2026US 12,576,948 B1Hotwire Development, LLC
- Rope grab device for a portable power driven system10 Mar 2026US 12,570,505 B2Skylotec GmbH
- Wilderness lifting system17 Feb 2026US 12,552,646 B2
- Line roller assembly10 Feb 2026US 12,545,560 B2
- Field-deployable modular snatch block device8 Oct 2026US 2026/0307955 A1
- Wind turbine mounted crane1 Oct 2026US 2026/0296845 A1Liftra IP Aps
- Frame for trenchless pipe replacement system and method1 Oct 2026US 2026/0298370 A1TT Technologies, Inc.
- Motorized Electric Cart Device27 Aug 2026US 2026/0249894 A1
- Pulley that can slide on webbing27 Aug 2026US 2026/0250107 A1Taizhou Sen Kang Protective Equipment Factory
Most cited
By later US patents
- Cable traction sheave40US 3,934,482 AThe United States of America as represented by the Secretary of the Navy · 1976
- Multiple pulley sheave assembly with retainer pulleys33US 4,492,363 A1985
- Adjustable, collapsible and portable game hoist33US 7,913,980 B12011
- Overhead hoist and sling apparatus for removing, storing and replacing a removable automobile hardtop30US 5,897,104 A1999
- Ratchet with journaled spool30US 6,092,791 A2000