Rotary actuated overspeed safety device
US6457569B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1999 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Oct 27, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/18
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A rotary actuated overspeed safety device is provided for elevators. The overspeed safety device comprises a pair of pivotally mounted counterweights linked by a pivotally attached coupling rod and a wheel that rollably engages a guide rail. The counterweights are pivotally mounted to the wheel in a parallel plane configuration. Centrifugal force causes the pivotally mounted counterweights to pivot outward toward an actuator as the wheel spins. The overspeed safety device is triggered when the pair of pivotally mounted counterweights engages an actuator. The actuator is a housing that is engagably connected to an elevator safety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.