B66B 5/044
Mechanical overspeed governors
Official title: {Mechanical overspeed governors}
B66B5/044 (Mechanical overspeed governors) appears on 137 US grants and 134 published applications in this corpus.
Search patents in B66B- Granted patents
- 137
- Published applications
- 134
- Assignees
- 39
- Inventors
- 241
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 2 |
| 2002 | 5 | 4 |
| 2003 | 1 | 4 |
| 2004 | 2 | 2 |
| 2005 | 1 | 0 |
| 2006 | 2 | 0 |
| 2007 | 1 | 3 |
| 2008 | 0 | 2 |
| 2009 | 4 | 2 |
| 2010 | 1 | 3 |
| 2011 | 1 | 6 |
| 2012 | 3 | 8 |
| 2013 | 2 | 4 |
| 2014 | 4 | 2 |
| 2015 | 4 | 5 |
| 2016 | 4 | 7 |
| 2017 | 2 | 13 |
| 2018 | 7 | 15 |
| 2019 | 13 | 13 |
| 2020 | 13 | 13 |
| 2021 | 12 | 5 |
| 2022 | 12 | 5 |
| 2023 | 9 | 4 |
| 2024 | 5 | 5 |
| 2025 | 1 | 3 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electromechanical sensing and safety actuation of elevator governors15 Sep 2026US 12,735,298 B1Otis Elevator Company
- Electromechanical safety actuation of elevator governors2 Jun 2026US 12,643,769 B2Otis Elevator Company
- Triggering unit for actuating an elevator braking device25 Feb 2025US 12,234,125 B2Wittur Holding GmbH
- Overspeed governor for a stairlift22 Oct 2024US 12,122,642 B2Otolift Trapliften B.V.
- Elevator counterweight mounted governor assemblies15 Oct 2024US 12,116,242 B2TK Elevator Innovation and Operations GmbH
- Elevator governor assembly with damper2 Jul 2026US 2026/0184536 A1Otis Elevator Company
- Electromechanical safety actuation of elevator governors23 Apr 2026US 2026/0109574 A1Otis Elevator Company
- Encoder mount on car-mounted governor19 Mar 2026US 2026/0077978 A1Otis Elevator Company
- Actuator activated by transversal acceleration5 Feb 2026US 2026/0036189 A1Brillianze Sweden AB
- Rope tensioning device for an overspeed governor of an elevator and an elevator comprising such a rope tensioning device4 Sep 2025US 2025/0276873 A1Wittur Holding GmbH
Most cited
By later US patents
- Elevator with a governor38US 5,377,786 AKabushiki Kaisha Toshiba · 1995
- Elevator car-mounted govenor system31US 5,052,523 AOtis Elevator Company · 1991
- Overspeed safety braking device26US 4,531,617 AD. Wickham and Company Limited · 1985
- Elevator system24US 4,662,481 AWestinghouse Electric Corp. · 1987
- Mechanical overspeed safety device24US 5,299,661 AOtis Elevator Company · 1994