B66B 13/12
Arrangements for effecting simultaneous opening or closing of cage and landing doors
B66B13/12 (Arrangements for effecting simultaneous opening or closing of cage and landing doors) appears on 139 US grants and 110 published applications in this corpus.
Search patents in B66B- Granted patents
- 139
- Published applications
- 110
- Assignees
- 33
- Inventors
- 223
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 1 |
| 2002 | 3 | 1 |
| 2003 | 2 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 5 |
| 2006 | 3 | 3 |
| 2007 | 2 | 2 |
| 2008 | 5 | 5 |
| 2009 | 2 | 1 |
| 2010 | 1 | 2 |
| 2011 | 0 | 2 |
| 2012 | 0 | 6 |
| 2013 | 2 | 3 |
| 2014 | 3 | 2 |
| 2015 | 3 | 7 |
| 2016 | 4 | 5 |
| 2017 | 7 | 4 |
| 2018 | 6 | 5 |
| 2019 | 5 | 9 |
| 2020 | 3 | 15 |
| 2021 | 9 | 8 |
| 2022 | 13 | 2 |
| 2023 | 11 | 5 |
| 2024 | 2 | 4 |
| 2025 | 4 | 5 |
| 2026 | 0 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Elevator car door locking device and elevator equipment25 Nov 2025US 12,479,701 B2Otis Elevator Company
- Walk-to-work system and method thereof4 Nov 2025US 12,459,609 B2MacGregor Norway AS
- Magnetic door coupler13 May 2025US 12,297,078 B2Otis Elevator Company
- Elevator door interlock device, elevator door interlock operation method and elevator system25 Feb 2025US 12,234,123 B2Otis Elevator Company
- Magnetically activated elevator door lock2 Apr 2024US 11,945,685 B2Otis Elevator Company
- Car door interlock13 Aug 2026US 2026/0233975 A1Otis Elevator Company
- Lock hook assembly, door hanging plate assembly, hall door lock device, and elevator system9 Jul 2026US 2026/0193060 A1Otls Elevator Company
- Lost motion slider for operating an elevator car door interlock21 May 2026US 2026/0138851 A1Otis Elevator Company
- Door system16 Apr 2026US 2026/0103361 A1Inventio AG
- Door drive device with two independently displaceable drivers5 Feb 2026US 2026/0035213 A1Inventio AG
Most cited
By later US patents
- Door drive apparatus with locking mechanism for elevators46US 4,947,964 AInventio AG · 1990
- Door coupler and latch system for elevator car and landing doors31US 6,446,759 B1Otis Elevator Company · 2002
- Elevator evacuation deterrent device25US 5,819,877 AOtis Elevator Company · 1998
- Door drive apparatus with locking mechanism for elevators23US 5,246,089 AInventio AG · 1993
- Apparatus for opening and closing a car door and a shaft door of an elevator installation23US 6,021,871 AInventio AG · 2000