Elevator speed measurement system including reflective signal technology for making speed determinations
US6484849B2 · kind B2 · utility
3Cited by
11References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Feb 28, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S187/90
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator speed measurement system includes a reflective sensing device that is supported within the hoistway. In one example, the reflective sensing device is a radar-type device that is supported for movement with the cab through the hoistway. Reflected signals off of a structural component within the hoistway provides information regarding speed of movement of the cab in the hoistway. The speed signals are then transmitted to a remotely located receiver that provides an indication to a technician of the speed of the elevator movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.