B66B 15/04
Friction sheaves
Official title: Friction sheaves; "Koepe" pulleys
B66B15/04 (Friction sheaves) appears on 101 US grants and 122 published applications in this corpus.
Search patents in B66B- Granted patents
- 101
- Published applications
- 122
- Assignees
- 25
- Inventors
- 222
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 7 | 3 |
| 2003 | 1 | 3 |
| 2004 | 3 | 5 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 3 |
| 2009 | 0 | 3 |
| 2010 | 0 | 2 |
| 2011 | 2 | 6 |
| 2012 | 2 | 2 |
| 2013 | 2 | 1 |
| 2014 | 1 | 5 |
| 2015 | 2 | 6 |
| 2016 | 2 | 11 |
| 2017 | 9 | 9 |
| 2018 | 3 | 10 |
| 2019 | 8 | 12 |
| 2020 | 9 | 14 |
| 2021 | 13 | 7 |
| 2022 | 12 | 2 |
| 2023 | 4 | 3 |
| 2024 | 4 | 4 |
| 2025 | 2 | 5 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Elevator car and elevator30 Dec 2025US 12,509,330 B2Hitachi, Ltd.
- Elevator system with method of position detection of a car14 Oct 2025US 12,441,585 B2Kone Corporation
- Belt sheave for passenger conveyor systems6 Aug 2024US 12,055,206 B2Otis Elevator Company
- Tension equalizing traction sheave assembly for elevator assemblies23 Jul 2024US 12,043,518 B1TK Elevator Innovation and Operations GmbH
- Pulley for guiding a belt for carrying a car and/or a counterweight of an elevator system18 Jun 2024US 12,012,304 B2Inventio AG
- Elevator Car and Elevator26 Mar 2026US 2026/0084935 A1Hitachi, Ltd.
- Rack for machine roomless elevator system, elevator lifting drive and elevator system19 Feb 2026US 2026/0048965 A1Otis Elevator Company
- Elevator sheave liner, elevator sheave assembly, and elevator system13 Nov 2025US 2025/0346455 A1Otis Elevator Company
- Elevator sheave liner, elevator sheave assembly, and elevator system13 Nov 2025US 2025/0346456 A1Otis Elevator Company
- Pulley for a suspension element11 Sep 2025US 2025/0282578 A1Faigle Kunststoffe GmbH
Most cited
By later US patents
- Rope drive element for driving synthetic fiber ropes34US 6,371,448 B1Inventio AG · 2002
- Tension member for an elevator34US 6,739,433 B1Otis Elevator Company · 2004
- Ether-based polyurethane elevator sheave liner-polyurethane-urea made from polyether urethane prepolymer chain extended with polyester/diamine blend30US 5,112,933 AOtis Elevator Company · 1992
- Traction elevator system having cable groove in drive sheave formed by spaced, elastically deflectable metallic ring members29US 4,030,569 AWestinghouse Electric Corp. · 1977
- Elevator traction sheave28US 6,386,324 B1Otis Elevator Company · 2002