B66B 1/308
With ac powered elevator drive
Official title: {with AC powered elevator drive}
B66B1/308 (With ac powered elevator drive) appears on 110 US grants and 95 published applications in this corpus.
Search patents in B66B- Granted patents
- 110
- Published applications
- 95
- Assignees
- 35
- Inventors
- 207
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 6 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 6 |
| 2008 | 1 | 2 |
| 2009 | 3 | 6 |
| 2010 | 5 | 6 |
| 2011 | 3 | 3 |
| 2012 | 6 | 2 |
| 2013 | 1 | 2 |
| 2014 | 4 | 2 |
| 2015 | 3 | 7 |
| 2016 | 2 | 4 |
| 2017 | 2 | 4 |
| 2018 | 6 | 7 |
| 2019 | 2 | 4 |
| 2020 | 3 | 12 |
| 2021 | 11 | 6 |
| 2022 | 10 | 7 |
| 2023 | 3 | 1 |
| 2024 | 2 | 3 |
| 2025 | 0 | 5 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Conveyance system with regenerative drive6 Oct 2026US 12,753,042 B2Otis Elevator Company
- Drive of an elevator system17 Mar 2026US 12,577,082 B2Inventio AG
- Control device for elevator17 Sep 2024US 12,091,282 B2Mitsubishi Electric Corporation
- Method for reducing thermal stress of a power semiconductor switch, an electrical converter unit and an elevator28 May 2024US 11,993,479 B2Kone Corporation
- Semiconductor device, method for manufacturing semiconductor device, inverter circuit, drive device, vehicle, and elevator19 Dec 2023US 11,848,211 B2Kabushiki Kaisha Toshiba
- Elevator system with capacitor pre-charge30 Jul 2026US 2026/0217493 A1Otis Elevator Company
- Active dynamic braking solution for an elevator system30 Apr 2026US 2026/0116705 A1Kone Corporation
- Safety torque off device for interrupting the generation of torque by an elevator installation drive machine supplied by a power supply device16 Apr 2026US 2026/0103360 A1Inventio AG
- Systems and methods for battery management of subject lift units5 Mar 2026US 2026/0062258 A1Liko Research & Development AB
- Safe torque off using digital isolator16 Oct 2025US 2025/0320084 A1Otis Elevator Company
Most cited
By later US patents
- Display control apparatus for elevator91US 4,749,062 AMitsubishi Denki Kabushiki Kaisha · 1988
- Device for driving elevator at service interruption54US 5,285,029 AMitsubishi Denki Kabushiki Kaisha · 1994
- Control apparatus for elevator46US 4,666,020 AMitsubishi Denki Kabushiki Kaisha · 1987
- Method and system for stopping elevators using AC motors driven by static frequency converters44US 7,775,327 B2Danfoss A/S · 2010
- Alternating current motor control apparatus37US 4,902,954 A1990