Elevator having a limit switch for controlling power to the drive system as an elevator car approaches a shallow pit or a low overhead
US8162108B2 · kind B2 · utility
13Cited by
13References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2006 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Nov 17, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/16
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The elevator has a car movable vertically within a shaft between lower and upper end positions and a drive system coupled to a traction system for controlling movement of the car. A limit switch which is open when the car is in a selected distance range from one of the end positions. The limit switch forms part of a power line supplying power to the drive system for controlling movement of the car in a direction towards that end position in an inspection operation. Thus movement of the car is prevented only in that direction when the car is in the selected distance range in an inspection operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.