Passenger lift with an electric safety interlock
US5228538A · kind A · utility
28Cited by
15References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1992 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Feb 12, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S414/134
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A passenger lift incorporates an electronic safety interlock to prevent all movement of the lift, until a restraining belt is fastened. In some embodiments, the interlock is a normally open electric switch located inside the restraining belt's buckle. The switch is closed and the movement of the lift actuated only when the restraining belt's matingly interlocking tab is inserted in the buckle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.